1168 lines
36 KiB
Java
1168 lines
36 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.commons.lang3;
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import org.apache.commons.lang3.math.NumberUtils;
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/**
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* <p>
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* Operations on boolean primitives and Boolean objects.
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* </p>
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*
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* <p>
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* This class tries to handle {@code null} input gracefully. An exception will
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* not be thrown for a {@code null} input. Each method documents its behavior in
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* more detail.
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* </p>
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*
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* <p>
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* #ThreadSafe#
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* </p>
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*
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* @since 2.0
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*/
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public class BooleanUtils {
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/**
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* The false String {@code "false"}.
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*
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* @since 3.12.0
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*/
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public static final String FALSE = "false";
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/**
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* The no String {@code "no"}.
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*
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* @since 3.12.0
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*/
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public static final String NO = "no";
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/**
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* The off String {@code "off"}.
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*
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* @since 3.12.0
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*/
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public static final String OFF = "off";
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/**
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* The on String {@code "on"}.
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*
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* @since 3.12.0
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*/
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public static final String ON = "on";
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/**
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* The true String {@code "true"}.
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*
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* @since 3.12.0
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*/
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public static final String TRUE = "true";
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/**
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* The yes String {@code "yes"}.
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*
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* @since 3.12.0
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*/
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public static final String YES = "yes";
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/**
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* <p>
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* Performs an 'and' operation on a set of booleans.
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* </p>
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*
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* <pre>
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* BooleanUtils.and(true, true) = true
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* BooleanUtils.and(false, false) = false
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* BooleanUtils.and(true, false) = false
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* BooleanUtils.and(true, true, false) = false
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* BooleanUtils.and(true, true, true) = true
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* </pre>
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*
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* @param array an array of {@code boolean}s
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* @return the result of the logical 'and' operation. That is {@code false} if
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* any of the parameters is {@code false} and {@code true} otherwise.
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* @throws NullPointerException if {@code array} is {@code null}
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* @throws IllegalArgumentException if {@code array} is empty.
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* @since 3.0.1
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*/
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public static boolean and(final boolean... array) {
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ObjectUtils.requireNonEmpty(array, "array");
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for (final boolean element : array) {
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if (!element) {
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return false;
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}
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}
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return true;
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}
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/**
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* Returns a new array of possible values (like an enum would).
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*
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* @return a new array of possible values (like an enum would).
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* @since 3.12.0
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*/
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public static Boolean[] booleanValues() {
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return new Boolean[] { Boolean.FALSE, Boolean.TRUE };
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}
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/**
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* <p>
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* Compares two {@code boolean} values. This is the same functionality as
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* provided in Java 7.
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* </p>
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*
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* @param x the first {@code boolean} to compare
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* @param y the second {@code boolean} to compare
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* @return the value {@code 0} if {@code x == y}; a value less than {@code 0} if
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* {@code !x && y}; and a value greater than {@code 0} if
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* {@code x && !y}
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* @since 3.4
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*/
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public static int compare(final boolean x, final boolean y) {
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if (x == y) {
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return 0;
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}
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return x ? 1 : -1;
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}
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/**
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* <p>
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* Checks if a {@code Boolean} value is {@code false}, handling {@code null} by
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* returning {@code false}.
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* </p>
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*
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* <pre>
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* BooleanUtils.isFalse(Boolean.TRUE) = false
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* BooleanUtils.isFalse(Boolean.FALSE) = true
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* BooleanUtils.isFalse(null) = false
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* </pre>
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*
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* @param bool the boolean to check, null returns {@code false}
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* @return {@code true} only if the input is non-{@code null} and {@code false}
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* @since 2.1
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*/
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public static boolean isFalse(final Boolean bool) {
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return Boolean.FALSE.equals(bool);
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}
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/**
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* <p>
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* Checks if a {@code Boolean} value is <i>not</i> {@code false}, handling
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* {@code null} by returning {@code true}.
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* </p>
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*
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* <pre>
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* BooleanUtils.isNotFalse(Boolean.TRUE) = true
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* BooleanUtils.isNotFalse(Boolean.FALSE) = false
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* BooleanUtils.isNotFalse(null) = true
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* </pre>
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*
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* @param bool the boolean to check, null returns {@code true}
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* @return {@code true} if the input is {@code null} or {@code true}
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* @since 2.3
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*/
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public static boolean isNotFalse(final Boolean bool) {
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return !isFalse(bool);
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}
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/**
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* <p>
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* Checks if a {@code Boolean} value is <i>not</i> {@code true}, handling
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* {@code null} by returning {@code true}.
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* </p>
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*
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* <pre>
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* BooleanUtils.isNotTrue(Boolean.TRUE) = false
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* BooleanUtils.isNotTrue(Boolean.FALSE) = true
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* BooleanUtils.isNotTrue(null) = true
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* </pre>
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*
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* @param bool the boolean to check, null returns {@code true}
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* @return {@code true} if the input is null or false
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* @since 2.3
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*/
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public static boolean isNotTrue(final Boolean bool) {
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return !isTrue(bool);
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}
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/**
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* <p>
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* Checks if a {@code Boolean} value is {@code true}, handling {@code null} by
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* returning {@code false}.
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* </p>
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*
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* <pre>
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* BooleanUtils.isTrue(Boolean.TRUE) = true
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* BooleanUtils.isTrue(Boolean.FALSE) = false
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* BooleanUtils.isTrue(null) = false
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* </pre>
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*
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* @param bool the boolean to check, {@code null} returns {@code false}
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* @return {@code true} only if the input is non-null and true
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* @since 2.1
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*/
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public static boolean isTrue(final Boolean bool) {
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return Boolean.TRUE.equals(bool);
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}
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/**
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* <p>
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* Negates the specified boolean.
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* </p>
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*
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* <p>
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* If {@code null} is passed in, {@code null} will be returned.
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* </p>
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*
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* <p>
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* NOTE: This returns {@code null} and will throw a {@code NullPointerException}
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* if unboxed to a boolean.
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* </p>
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*
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* <pre>
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* BooleanUtils.negate(Boolean.TRUE) = Boolean.FALSE;
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* BooleanUtils.negate(Boolean.FALSE) = Boolean.TRUE;
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* BooleanUtils.negate(null) = null;
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* </pre>
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*
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* @param bool the Boolean to negate, may be null
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* @return the negated Boolean, or {@code null} if {@code null} input
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*/
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public static Boolean negate(final Boolean bool) {
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if (bool == null) {
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return null;
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}
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return bool.booleanValue() ? Boolean.FALSE : Boolean.TRUE;
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}
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/**
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* <p>
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* Performs an 'or' operation on a set of booleans.
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* </p>
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*
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* <pre>
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* BooleanUtils.or(true, true) = true
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* BooleanUtils.or(false, false) = false
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* BooleanUtils.or(true, false) = true
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* BooleanUtils.or(true, true, false) = true
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* BooleanUtils.or(true, true, true) = true
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* BooleanUtils.or(false, false, false) = false
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* </pre>
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*
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* @param array an array of {@code boolean}s
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* @return {@code true} if any of the arguments is {@code true}, and it returns
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* {@code false} otherwise.
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* @throws NullPointerException if {@code array} is {@code null}
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* @throws IllegalArgumentException if {@code array} is empty.
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* @since 3.0.1
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*/
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public static boolean or(final boolean... array) {
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ObjectUtils.requireNonEmpty(array, "array");
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for (final boolean element : array) {
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if (element) {
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return true;
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}
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}
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return false;
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}
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/**
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* Returns a new array of possible values (like an enum would).
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*
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* @return a new array of possible values (like an enum would).
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* @since 3.12.0
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*/
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public static boolean[] primitiveValues() {
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return new boolean[] { false, true };
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}
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/**
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* <p>
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* Converts a Boolean to a boolean handling {@code null} by returning
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* {@code false}.
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* </p>
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*
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* <pre>
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* BooleanUtils.toBoolean(Boolean.TRUE) = true
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* BooleanUtils.toBoolean(Boolean.FALSE) = false
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* BooleanUtils.toBoolean(null) = false
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* </pre>
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*
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* @param bool the boolean to convert
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* @return {@code true} or {@code false}, {@code null} returns {@code false}
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*/
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public static boolean toBoolean(final Boolean bool) {
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return bool != null && bool.booleanValue();
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}
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/**
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* <p>
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* Converts an int to a boolean using the convention that {@code zero} is
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* {@code false}, everything else is {@code true}.
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* </p>
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*
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* <pre>
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* BooleanUtils.toBoolean(0) = false
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* BooleanUtils.toBoolean(1) = true
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* BooleanUtils.toBoolean(2) = true
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* </pre>
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*
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* @param value the int to convert
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* @return {@code true} if non-zero, {@code false} if zero
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*/
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public static boolean toBoolean(final int value) {
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return value != 0;
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}
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/**
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* <p>
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* Converts an int to a boolean specifying the conversion values.
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* </p>
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*
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* <p>
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* If the {@code trueValue} and {@code falseValue} are the same number then the
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* return value will be {@code true} in case {@code value} matches it.
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* </p>
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*
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* <pre>
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* BooleanUtils.toBoolean(0, 1, 0) = false
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* BooleanUtils.toBoolean(1, 1, 0) = true
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* BooleanUtils.toBoolean(1, 1, 1) = true
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* BooleanUtils.toBoolean(2, 1, 2) = false
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* BooleanUtils.toBoolean(2, 2, 0) = true
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* </pre>
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*
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* @param value the {@code Integer} to convert
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* @param trueValue the value to match for {@code true}
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* @param falseValue the value to match for {@code false}
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* @return {@code true} or {@code false}
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* @throws IllegalArgumentException if {@code value} does not match neither
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* {@code trueValue} no {@code falseValue}
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*/
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public static boolean toBoolean(final int value, final int trueValue, final int falseValue) {
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if (value == trueValue) {
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return true;
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}
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if (value == falseValue) {
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return false;
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}
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throw new IllegalArgumentException("The Integer did not match either specified value");
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}
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/**
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* <p>
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* Converts an Integer to a boolean specifying the conversion values.
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* </p>
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*
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* <pre>
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* BooleanUtils.toBoolean(Integer.valueOf(0), Integer.valueOf(1), Integer.valueOf(0)) = false
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* BooleanUtils.toBoolean(Integer.valueOf(1), Integer.valueOf(1), Integer.valueOf(0)) = true
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* BooleanUtils.toBoolean(Integer.valueOf(2), Integer.valueOf(1), Integer.valueOf(2)) = false
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* BooleanUtils.toBoolean(Integer.valueOf(2), Integer.valueOf(2), Integer.valueOf(0)) = true
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* BooleanUtils.toBoolean(null, null, Integer.valueOf(0)) = true
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* </pre>
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*
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* @param value the Integer to convert
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* @param trueValue the value to match for {@code true}, may be {@code null}
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* @param falseValue the value to match for {@code false}, may be {@code null}
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* @return {@code true} or {@code false}
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* @throws IllegalArgumentException if no match
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*/
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public static boolean toBoolean(final Integer value, final Integer trueValue, final Integer falseValue) {
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if (value == null) {
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if (trueValue == null) {
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return true;
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}
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if (falseValue == null) {
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return false;
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}
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} else if (value.equals(trueValue)) {
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return true;
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} else if (value.equals(falseValue)) {
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return false;
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}
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throw new IllegalArgumentException("The Integer did not match either specified value");
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}
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/**
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* <p>
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* Converts a String to a boolean (optimised for performance).
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* </p>
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*
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* <p>
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* {@code 'true'}, {@code 'on'}, {@code 'y'}, {@code 't'} or {@code 'yes'} (case
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* insensitive) will return {@code true}. Otherwise, {@code false} is returned.
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* </p>
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*
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* <p>
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* This method performs 4 times faster (JDK1.4) than
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* {@code Boolean.valueOf(String)}. However, this method accepts 'on' and 'yes',
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* 't', 'y' as true values.
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*
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* <pre>
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* BooleanUtils.toBoolean(null) = false
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* BooleanUtils.toBoolean("true") = true
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* BooleanUtils.toBoolean("TRUE") = true
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* BooleanUtils.toBoolean("tRUe") = true
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* BooleanUtils.toBoolean("on") = true
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* BooleanUtils.toBoolean("yes") = true
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* BooleanUtils.toBoolean("false") = false
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* BooleanUtils.toBoolean("x gti") = false
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* BooleanUtils.toBoolean("y") = true
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* BooleanUtils.toBoolean("n") = false
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* BooleanUtils.toBoolean("t") = true
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* BooleanUtils.toBoolean("f") = false
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* </pre>
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*
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* @param str the String to check
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* @return the boolean value of the string, {@code false} if no match or the
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* String is null
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*/
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public static boolean toBoolean(final String str) {
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return toBooleanObject(str) == Boolean.TRUE;
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}
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/**
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* <p>
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* Converts a String to a Boolean throwing an exception if no match found.
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* </p>
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*
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* <pre>
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* BooleanUtils.toBoolean("true", "true", "false") = true
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* BooleanUtils.toBoolean("false", "true", "false") = false
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* </pre>
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*
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* @param str the String to check
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* @param trueString the String to match for {@code true} (case sensitive), may
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* be {@code null}
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* @param falseString the String to match for {@code false} (case sensitive),
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* may be {@code null}
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* @return the boolean value of the string
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* @throws IllegalArgumentException if the String doesn't match
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*/
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public static boolean toBoolean(final String str, final String trueString, final String falseString) {
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if (str == trueString) {
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return true;
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} else if (str == falseString) {
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return false;
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} else if (str != null) {
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if (str.equals(trueString)) {
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return true;
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} else if (str.equals(falseString)) {
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return false;
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}
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}
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throw new IllegalArgumentException("The String did not match either specified value");
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}
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|
|
/**
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* <p>
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* Converts a Boolean to a boolean handling {@code null}.
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* </p>
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*
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* <pre>
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* BooleanUtils.toBooleanDefaultIfNull(Boolean.TRUE, false) = true
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* BooleanUtils.toBooleanDefaultIfNull(Boolean.TRUE, true) = true
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* BooleanUtils.toBooleanDefaultIfNull(Boolean.FALSE, true) = false
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* BooleanUtils.toBooleanDefaultIfNull(Boolean.FALSE, false) = false
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* BooleanUtils.toBooleanDefaultIfNull(null, true) = true
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* BooleanUtils.toBooleanDefaultIfNull(null, false) = false
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* </pre>
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*
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* @param bool the boolean object to convert to primitive
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* @param valueIfNull the boolean value to return if the parameter {@code bool}
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* is {@code null}
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* @return {@code true} or {@code false}
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*/
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public static boolean toBooleanDefaultIfNull(final Boolean bool, final boolean valueIfNull) {
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if (bool == null) {
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return valueIfNull;
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}
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return bool.booleanValue();
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}
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|
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/**
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* <p>
|
|
* Converts an int to a Boolean using the convention that {@code zero} is
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* {@code false}, everything else is {@code true}.
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* </p>
|
|
*
|
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* <pre>
|
|
* BooleanUtils.toBoolean(0) = Boolean.FALSE
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* BooleanUtils.toBoolean(1) = Boolean.TRUE
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* BooleanUtils.toBoolean(2) = Boolean.TRUE
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* </pre>
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*
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* @param value the int to convert
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* @return Boolean.TRUE if non-zero, Boolean.FALSE if zero, {@code null} if
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* {@code null}
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*/
|
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public static Boolean toBooleanObject(final int value) {
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return value == 0 ? Boolean.FALSE : Boolean.TRUE;
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}
|
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|
|
/**
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|
* <p>
|
|
* Converts an int to a Boolean specifying the conversion values.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* NOTE: This method may return {@code null} and may throw a
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* {@code NullPointerException} if unboxed to a {@code boolean}.
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* </p>
|
|
*
|
|
* <p>
|
|
* The checks are done first for the {@code trueValue}, then for the
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* {@code falseValue} and finally for the {@code nullValue}.
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* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toBooleanObject(0, 0, 2, 3) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(0, 0, 0, 3) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(0, 0, 0, 0) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(2, 1, 2, 3) = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject(2, 1, 2, 2) = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject(3, 1, 2, 3) = null
|
|
* </pre>
|
|
*
|
|
* @param value the Integer to convert
|
|
* @param trueValue the value to match for {@code true}
|
|
* @param falseValue the value to match for {@code false}
|
|
* @param nullValue the value to to match for {@code null}
|
|
* @return Boolean.TRUE, Boolean.FALSE, or {@code null}
|
|
* @throws IllegalArgumentException if no match
|
|
*/
|
|
public static Boolean toBooleanObject(final int value, final int trueValue, final int falseValue,
|
|
final int nullValue) {
|
|
if (value == trueValue) {
|
|
return Boolean.TRUE;
|
|
}
|
|
if (value == falseValue) {
|
|
return Boolean.FALSE;
|
|
}
|
|
if (value == nullValue) {
|
|
return null;
|
|
}
|
|
throw new IllegalArgumentException("The Integer did not match any specified value");
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts an Integer to a Boolean using the convention that {@code zero} is
|
|
* {@code false}, every other numeric value is {@code true}.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* {@code null} will be converted to {@code null}.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* NOTE: This method may return {@code null} and may throw a
|
|
* {@code NullPointerException} if unboxed to a {@code boolean}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(0)) = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(1)) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(null)) = null
|
|
* </pre>
|
|
*
|
|
* @param value the Integer to convert
|
|
* @return Boolean.TRUE if non-zero, Boolean.FALSE if zero, {@code null} if
|
|
* {@code null} input
|
|
*/
|
|
public static Boolean toBooleanObject(final Integer value) {
|
|
if (value == null) {
|
|
return null;
|
|
}
|
|
return value.intValue() == 0 ? Boolean.FALSE : Boolean.TRUE;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts an Integer to a Boolean specifying the conversion values.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* NOTE: This method may return {@code null} and may throw a
|
|
* {@code NullPointerException} if unboxed to a {@code boolean}.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* The checks are done first for the {@code trueValue}, then for the
|
|
* {@code falseValue} and finally for the {@code nullValue}.
|
|
* </p>
|
|
**
|
|
* <pre>
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(2), Integer.valueOf(3)) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(3)) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(0)) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(2), Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(3)) = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(2), Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(2)) = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject(Integer.valueOf(3), Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(3)) = null
|
|
* </pre>
|
|
*
|
|
* @param value the Integer to convert
|
|
* @param trueValue the value to match for {@code true}, may be {@code null}
|
|
* @param falseValue the value to match for {@code false}, may be {@code null}
|
|
* @param nullValue the value to to match for {@code null}, may be {@code null}
|
|
* @return Boolean.TRUE, Boolean.FALSE, or {@code null}
|
|
* @throws IllegalArgumentException if no match
|
|
*/
|
|
public static Boolean toBooleanObject(final Integer value, final Integer trueValue, final Integer falseValue,
|
|
final Integer nullValue) {
|
|
if (value == null) {
|
|
if (trueValue == null) {
|
|
return Boolean.TRUE;
|
|
}
|
|
if (falseValue == null) {
|
|
return Boolean.FALSE;
|
|
}
|
|
if (nullValue == null) {
|
|
return null;
|
|
}
|
|
} else if (value.equals(trueValue)) {
|
|
return Boolean.TRUE;
|
|
} else if (value.equals(falseValue)) {
|
|
return Boolean.FALSE;
|
|
} else if (value.equals(nullValue)) {
|
|
return null;
|
|
}
|
|
throw new IllegalArgumentException("The Integer did not match any specified value");
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a String to a Boolean.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* {@code 'true'}, {@code 'on'}, {@code 'y'}, {@code 't'}, {@code 'yes'} or
|
|
* {@code '1'} (case insensitive) will return {@code true}. {@code 'false'},
|
|
* {@code 'off'}, {@code 'n'}, {@code 'f'}, {@code 'no'} or {@code '0'} (case
|
|
* insensitive) will return {@code false}. Otherwise, {@code null} is returned.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* NOTE: This method may return {@code null} and may throw a
|
|
* {@code NullPointerException} if unboxed to a {@code boolean}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* // N.B. case is not significant
|
|
* BooleanUtils.toBooleanObject(null) = null
|
|
* BooleanUtils.toBooleanObject("true") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject("T") = Boolean.TRUE // i.e. T[RUE]
|
|
* BooleanUtils.toBooleanObject("false") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject("f") = Boolean.FALSE // i.e. f[alse]
|
|
* BooleanUtils.toBooleanObject("No") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject("n") = Boolean.FALSE // i.e. n[o]
|
|
* BooleanUtils.toBooleanObject("on") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject("ON") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject("off") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject("oFf") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject("yes") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject("Y") = Boolean.TRUE // i.e. Y[ES]
|
|
* BooleanUtils.toBooleanObject("1") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject("0") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject("blue") = null
|
|
* BooleanUtils.toBooleanObject("true ") = null // trailing space (too long)
|
|
* BooleanUtils.toBooleanObject("ono") = null // does not match on or no
|
|
* </pre>
|
|
*
|
|
* @param str the String to check; upper and lower case are treated as the same
|
|
* @return the Boolean value of the string, {@code null} if no match or
|
|
* {@code null} input
|
|
*/
|
|
public static Boolean toBooleanObject(final String str) {
|
|
// Previously used equalsIgnoreCase, which was fast for interned 'true'.
|
|
// Non interned 'true' matched 15 times slower.
|
|
//
|
|
// Optimisation provides same performance as before for interned 'true'.
|
|
// Similar performance for null, 'false', and other strings not length 2/3/4.
|
|
// 'true'/'TRUE' match 4 times slower, 'tRUE'/'True' 7 times slower.
|
|
if (str == TRUE) {
|
|
return Boolean.TRUE;
|
|
}
|
|
if (str == null) {
|
|
return null;
|
|
}
|
|
switch (str.length()) {
|
|
case 1: {
|
|
final char ch0 = str.charAt(0);
|
|
if (ch0 == 'y' || ch0 == 'Y' || ch0 == 't' || ch0 == 'T' || ch0 == '1') {
|
|
return Boolean.TRUE;
|
|
}
|
|
if (ch0 == 'n' || ch0 == 'N' || ch0 == 'f' || ch0 == 'F' || ch0 == '0') {
|
|
return Boolean.FALSE;
|
|
}
|
|
break;
|
|
}
|
|
case 2: {
|
|
final char ch0 = str.charAt(0);
|
|
final char ch1 = str.charAt(1);
|
|
if ((ch0 == 'o' || ch0 == 'O') && (ch1 == 'n' || ch1 == 'N')) {
|
|
return Boolean.TRUE;
|
|
}
|
|
if ((ch0 == 'n' || ch0 == 'N') && (ch1 == 'o' || ch1 == 'O')) {
|
|
return Boolean.FALSE;
|
|
}
|
|
break;
|
|
}
|
|
case 3: {
|
|
final char ch0 = str.charAt(0);
|
|
final char ch1 = str.charAt(1);
|
|
final char ch2 = str.charAt(2);
|
|
if ((ch0 == 'y' || ch0 == 'Y') && (ch1 == 'e' || ch1 == 'E') && (ch2 == 's' || ch2 == 'S')) {
|
|
return Boolean.TRUE;
|
|
}
|
|
if ((ch0 == 'o' || ch0 == 'O') && (ch1 == 'f' || ch1 == 'F') && (ch2 == 'f' || ch2 == 'F')) {
|
|
return Boolean.FALSE;
|
|
}
|
|
break;
|
|
}
|
|
case 4: {
|
|
final char ch0 = str.charAt(0);
|
|
final char ch1 = str.charAt(1);
|
|
final char ch2 = str.charAt(2);
|
|
final char ch3 = str.charAt(3);
|
|
if ((ch0 == 't' || ch0 == 'T') && (ch1 == 'r' || ch1 == 'R') && (ch2 == 'u' || ch2 == 'U')
|
|
&& (ch3 == 'e' || ch3 == 'E')) {
|
|
return Boolean.TRUE;
|
|
}
|
|
break;
|
|
}
|
|
case 5: {
|
|
final char ch0 = str.charAt(0);
|
|
final char ch1 = str.charAt(1);
|
|
final char ch2 = str.charAt(2);
|
|
final char ch3 = str.charAt(3);
|
|
final char ch4 = str.charAt(4);
|
|
if ((ch0 == 'f' || ch0 == 'F') && (ch1 == 'a' || ch1 == 'A') && (ch2 == 'l' || ch2 == 'L')
|
|
&& (ch3 == 's' || ch3 == 'S') && (ch4 == 'e' || ch4 == 'E')) {
|
|
return Boolean.FALSE;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a String to a Boolean throwing an exception if no match.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* NOTE: This method may return {@code null} and may throw a
|
|
* {@code NullPointerException} if unboxed to a {@code boolean}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toBooleanObject("true", "true", "false", "null") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(null, null, "false", "null") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(null, null, null, "null") = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject(null, null, null, null) = Boolean.TRUE
|
|
* BooleanUtils.toBooleanObject("false", "true", "false", "null") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject("false", "true", "false", "false") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject(null, "true", null, "false") = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject(null, "true", null, null) = Boolean.FALSE
|
|
* BooleanUtils.toBooleanObject("null", "true", "false", "null") = null
|
|
* </pre>
|
|
*
|
|
* @param str the String to check
|
|
* @param trueString the String to match for {@code true} (case sensitive), may
|
|
* be {@code null}
|
|
* @param falseString the String to match for {@code false} (case sensitive),
|
|
* may be {@code null}
|
|
* @param nullString the String to match for {@code null} (case sensitive), may
|
|
* be {@code null}
|
|
* @return the Boolean value of the string, {@code null} if either the String
|
|
* matches {@code nullString} or if {@code null} input and
|
|
* {@code nullString} is {@code null}
|
|
* @throws IllegalArgumentException if the String doesn't match
|
|
*/
|
|
public static Boolean toBooleanObject(final String str, final String trueString, final String falseString,
|
|
final String nullString) {
|
|
if (str == null) {
|
|
if (trueString == null) {
|
|
return Boolean.TRUE;
|
|
}
|
|
if (falseString == null) {
|
|
return Boolean.FALSE;
|
|
}
|
|
if (nullString == null) {
|
|
return null;
|
|
}
|
|
} else if (str.equals(trueString)) {
|
|
return Boolean.TRUE;
|
|
} else if (str.equals(falseString)) {
|
|
return Boolean.FALSE;
|
|
} else if (str.equals(nullString)) {
|
|
return null;
|
|
}
|
|
// no match
|
|
throw new IllegalArgumentException("The String did not match any specified value");
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to an int using the convention that {@code true} is
|
|
* {@code 1} and {@code false} is {@code 0}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toInteger(true) = 1
|
|
* BooleanUtils.toInteger(false) = 0
|
|
* </pre>
|
|
*
|
|
* @param bool the boolean to convert
|
|
* @return one if {@code true}, zero if {@code false}
|
|
*/
|
|
public static int toInteger(final boolean bool) {
|
|
return bool ? 1 : 0;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to an int specifying the conversion values.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toInteger(true, 1, 0) = 1
|
|
* BooleanUtils.toInteger(false, 1, 0) = 0
|
|
* </pre>
|
|
*
|
|
* @param bool the to convert
|
|
* @param trueValue the value to return if {@code true}
|
|
* @param falseValue the value to return if {@code false}
|
|
* @return the appropriate value
|
|
*/
|
|
public static int toInteger(final boolean bool, final int trueValue, final int falseValue) {
|
|
return bool ? trueValue : falseValue;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a Boolean to an int specifying the conversion values.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toInteger(Boolean.TRUE, 1, 0, 2) = 1
|
|
* BooleanUtils.toInteger(Boolean.FALSE, 1, 0, 2) = 0
|
|
* BooleanUtils.toInteger(null, 1, 0, 2) = 2
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to convert
|
|
* @param trueValue the value to return if {@code true}
|
|
* @param falseValue the value to return if {@code false}
|
|
* @param nullValue the value to return if {@code null}
|
|
* @return the appropriate value
|
|
*/
|
|
public static int toInteger(final Boolean bool, final int trueValue, final int falseValue, final int nullValue) {
|
|
if (bool == null) {
|
|
return nullValue;
|
|
}
|
|
return bool.booleanValue() ? trueValue : falseValue;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to an Integer using the convention that {@code true} is
|
|
* {@code 1} and {@code false} is {@code 0}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toIntegerObject(true) = Integer.valueOf(1)
|
|
* BooleanUtils.toIntegerObject(false) = Integer.valueOf(0)
|
|
* </pre>
|
|
*
|
|
* @param bool the boolean to convert
|
|
* @return one if {@code true}, zero if {@code false}
|
|
*/
|
|
public static Integer toIntegerObject(final boolean bool) {
|
|
return bool ? NumberUtils.INTEGER_ONE : NumberUtils.INTEGER_ZERO;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to an Integer specifying the conversion values.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toIntegerObject(true, Integer.valueOf(1), Integer.valueOf(0)) = Integer.valueOf(1)
|
|
* BooleanUtils.toIntegerObject(false, Integer.valueOf(1), Integer.valueOf(0)) = Integer.valueOf(0)
|
|
* </pre>
|
|
*
|
|
* @param bool the to convert
|
|
* @param trueValue the value to return if {@code true}, may be {@code null}
|
|
* @param falseValue the value to return if {@code false}, may be {@code null}
|
|
* @return the appropriate value
|
|
*/
|
|
public static Integer toIntegerObject(final boolean bool, final Integer trueValue, final Integer falseValue) {
|
|
return bool ? trueValue : falseValue;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a Boolean to a Integer using the convention that {@code zero} is
|
|
* {@code false}.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* {@code null} will be converted to {@code null}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toIntegerObject(Boolean.TRUE) = Integer.valueOf(1)
|
|
* BooleanUtils.toIntegerObject(Boolean.FALSE) = Integer.valueOf(0)
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to convert
|
|
* @return one if Boolean.TRUE, zero if Boolean.FALSE, {@code null} if
|
|
* {@code null}
|
|
*/
|
|
public static Integer toIntegerObject(final Boolean bool) {
|
|
if (bool == null) {
|
|
return null;
|
|
}
|
|
return bool.booleanValue() ? NumberUtils.INTEGER_ONE : NumberUtils.INTEGER_ZERO;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a Boolean to an Integer specifying the conversion values.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toIntegerObject(Boolean.TRUE, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2)) = Integer.valueOf(1)
|
|
* BooleanUtils.toIntegerObject(Boolean.FALSE, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2)) = Integer.valueOf(0)
|
|
* BooleanUtils.toIntegerObject(null, Integer.valueOf(1), Integer.valueOf(0), Integer.valueOf(2)) = Integer.valueOf(2)
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to convert
|
|
* @param trueValue the value to return if {@code true}, may be {@code null}
|
|
* @param falseValue the value to return if {@code false}, may be {@code null}
|
|
* @param nullValue the value to return if {@code null}, may be {@code null}
|
|
* @return the appropriate value
|
|
*/
|
|
public static Integer toIntegerObject(final Boolean bool, final Integer trueValue, final Integer falseValue,
|
|
final Integer nullValue) {
|
|
if (bool == null) {
|
|
return nullValue;
|
|
}
|
|
return bool.booleanValue() ? trueValue : falseValue;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to a String returning one of the input Strings.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toString(true, "true", "false") = "true"
|
|
* BooleanUtils.toString(false, "true", "false") = "false"
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @param trueString the String to return if {@code true}, may be {@code null}
|
|
* @param falseString the String to return if {@code false}, may be {@code null}
|
|
* @return one of the two input Strings
|
|
*/
|
|
public static String toString(final boolean bool, final String trueString, final String falseString) {
|
|
return bool ? trueString : falseString;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a Boolean to a String returning one of the input Strings.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toString(Boolean.TRUE, "true", "false", null) = "true"
|
|
* BooleanUtils.toString(Boolean.FALSE, "true", "false", null) = "false"
|
|
* BooleanUtils.toString(null, "true", "false", null) = null;
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @param trueString the String to return if {@code true}, may be {@code null}
|
|
* @param falseString the String to return if {@code false}, may be {@code null}
|
|
* @param nullString the String to return if {@code null}, may be {@code null}
|
|
* @return one of the three input Strings
|
|
*/
|
|
public static String toString(final Boolean bool, final String trueString, final String falseString,
|
|
final String nullString) {
|
|
if (bool == null) {
|
|
return nullString;
|
|
}
|
|
return bool.booleanValue() ? trueString : falseString;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to a String returning {@code 'on'} or {@code 'off'}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toStringOnOff(true) = "on"
|
|
* BooleanUtils.toStringOnOff(false) = "off"
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @return {@code 'on'}, {@code 'off'}, or {@code null}
|
|
*/
|
|
public static String toStringOnOff(final boolean bool) {
|
|
return toString(bool, ON, OFF);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a Boolean to a String returning {@code 'on'}, {@code 'off'}, or
|
|
* {@code null}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toStringOnOff(Boolean.TRUE) = "on"
|
|
* BooleanUtils.toStringOnOff(Boolean.FALSE) = "off"
|
|
* BooleanUtils.toStringOnOff(null) = null;
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @return {@code 'on'}, {@code 'off'}, or {@code null}
|
|
*/
|
|
public static String toStringOnOff(final Boolean bool) {
|
|
return toString(bool, ON, OFF, null);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to a String returning {@code 'true'} or {@code 'false'}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toStringTrueFalse(true) = "true"
|
|
* BooleanUtils.toStringTrueFalse(false) = "false"
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @return {@code 'true'}, {@code 'false'}, or {@code null}
|
|
*/
|
|
public static String toStringTrueFalse(final boolean bool) {
|
|
return toString(bool, TRUE, FALSE);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a Boolean to a String returning {@code 'true'}, {@code 'false'}, or
|
|
* {@code null}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toStringTrueFalse(Boolean.TRUE) = "true"
|
|
* BooleanUtils.toStringTrueFalse(Boolean.FALSE) = "false"
|
|
* BooleanUtils.toStringTrueFalse(null) = null;
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @return {@code 'true'}, {@code 'false'}, or {@code null}
|
|
*/
|
|
public static String toStringTrueFalse(final Boolean bool) {
|
|
return toString(bool, TRUE, FALSE, null);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a boolean to a String returning {@code 'yes'} or {@code 'no'}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toStringYesNo(true) = "yes"
|
|
* BooleanUtils.toStringYesNo(false) = "no"
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @return {@code 'yes'}, {@code 'no'}, or {@code null}
|
|
*/
|
|
public static String toStringYesNo(final boolean bool) {
|
|
return toString(bool, YES, NO);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Converts a Boolean to a String returning {@code 'yes'}, {@code 'no'}, or
|
|
* {@code null}.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.toStringYesNo(Boolean.TRUE) = "yes"
|
|
* BooleanUtils.toStringYesNo(Boolean.FALSE) = "no"
|
|
* BooleanUtils.toStringYesNo(null) = null;
|
|
* </pre>
|
|
*
|
|
* @param bool the Boolean to check
|
|
* @return {@code 'yes'}, {@code 'no'}, or {@code null}
|
|
*/
|
|
public static String toStringYesNo(final Boolean bool) {
|
|
return toString(bool, YES, NO, null);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Performs an xor on a set of booleans.
|
|
* </p>
|
|
*
|
|
* <pre>
|
|
* BooleanUtils.xor(true, true) = false
|
|
* BooleanUtils.xor(false, false) = false
|
|
* BooleanUtils.xor(true, false) = true
|
|
* </pre>
|
|
*
|
|
* @param array an array of {@code boolean}s
|
|
* @return the result of the xor operations
|
|
* @throws NullPointerException if {@code array} is {@code null}
|
|
* @throws IllegalArgumentException if {@code array} is empty.
|
|
*/
|
|
public static boolean xor(final boolean... array) {
|
|
ObjectUtils.requireNonEmpty(array, "array");
|
|
// false if the neutral element of the xor operator
|
|
boolean result = false;
|
|
for (final boolean element : array) {
|
|
result ^= element;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* {@code BooleanUtils} instances should NOT be constructed in standard
|
|
* programming. Instead, the class should be used as
|
|
* {@code BooleanUtils.negate(true);}.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* This constructor is public to permit tools that require a JavaBean instance
|
|
* to operate.
|
|
* </p>
|
|
*/
|
|
public BooleanUtils() {
|
|
}
|
|
|
|
}
|