136 lines
4.4 KiB
Java
136 lines
4.4 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 java.util.HashMap;
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import java.util.Map;
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import java.util.stream.Stream;
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import org.apache.commons.lang3.arch.Processor;
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/**
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* An utility class for the os.arch System Property. The class defines methods
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* for identifying the architecture of the current JVM.
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* <p>
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* Important: The os.arch System Property returns the architecture used by the
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* JVM not of the operating system.
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* </p>
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*
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* @since 3.6
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*/
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public class ArchUtils {
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private static final Map<String, Processor> ARCH_TO_PROCESSOR;
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static {
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ARCH_TO_PROCESSOR = new HashMap<>();
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init();
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}
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private static void init() {
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init_X86_32Bit();
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init_X86_64Bit();
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init_IA64_32Bit();
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init_IA64_64Bit();
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init_PPC_32Bit();
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init_PPC_64Bit();
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}
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private static void init_X86_32Bit() {
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final Processor processor = new Processor(Processor.Arch.BIT_32, Processor.Type.X86);
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addProcessors(processor, "x86", "i386", "i486", "i586", "i686", "pentium");
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}
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private static void init_X86_64Bit() {
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final Processor processor = new Processor(Processor.Arch.BIT_64, Processor.Type.X86);
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addProcessors(processor, "x86_64", "amd64", "em64t", "universal");
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}
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private static void init_IA64_32Bit() {
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final Processor processor = new Processor(Processor.Arch.BIT_32, Processor.Type.IA_64);
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addProcessors(processor, "ia64_32", "ia64n");
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}
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private static void init_IA64_64Bit() {
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final Processor processor = new Processor(Processor.Arch.BIT_64, Processor.Type.IA_64);
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addProcessors(processor, "ia64", "ia64w");
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}
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private static void init_PPC_32Bit() {
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final Processor processor = new Processor(Processor.Arch.BIT_32, Processor.Type.PPC);
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addProcessors(processor, "ppc", "power", "powerpc", "power_pc", "power_rs");
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}
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private static void init_PPC_64Bit() {
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final Processor processor = new Processor(Processor.Arch.BIT_64, Processor.Type.PPC);
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addProcessors(processor, "ppc64", "power64", "powerpc64", "power_pc64", "power_rs64");
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}
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/**
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* Adds the given {@link Processor} with the given key {@link String} to the
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* map.
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*
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* @param key The key as {@link String}.
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* @param processor The {@link Processor} to add.
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* @throws IllegalStateException If the key already exists.
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*/
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private static void addProcessor(final String key, final Processor processor) {
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if (ARCH_TO_PROCESSOR.containsKey(key)) {
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throw new IllegalStateException("Key " + key + " already exists in processor map");
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}
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ARCH_TO_PROCESSOR.put(key, processor);
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}
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/**
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* Adds the given {@link Processor} with the given keys to the map.
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*
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* @param keys The keys.
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* @param processor The {@link Processor} to add.
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* @throws IllegalStateException If the key already exists.
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*/
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private static void addProcessors(final Processor processor, final String... keys) {
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Stream.of(keys).forEach(e -> addProcessor(e, processor));
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}
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/**
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* Returns a {@link Processor} object of the current JVM.
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*
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* <p>
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* Important: The os.arch System Property returns the architecture used by the
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* JVM not of the operating system.
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* </p>
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*
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* @return A {@link Processor} when supported, else {@code null}.
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*/
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public static Processor getProcessor() {
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return getProcessor(SystemUtils.OS_ARCH);
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}
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/**
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* Returns a {@link Processor} object the given value {@link String}. The
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* {@link String} must be like a value returned by the os.arch System Property.
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*
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* @param value A {@link String} like a value returned by the os.arch System
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* Property.
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* @return A {@link Processor} when it exists, else {@code null}.
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*/
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public static Processor getProcessor(final String value) {
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return ARCH_TO_PROCESSOR.get(value);
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}
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}
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