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Further progress on SimpleDateFormat
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konsoletyper
parent
c0909c7cce
commit
2127ae4280
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@ -16,6 +16,7 @@
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package org.teavm.classlib.java.text;
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import org.teavm.classlib.java.util.TCalendar;
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import org.teavm.classlib.java.util.TGregorianCalendar;
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/**
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*
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@ -157,4 +158,122 @@ abstract class DateFormatElement {
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}
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}
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}
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public static class Numeric extends DateFormatElement {
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private int field;
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private int length;
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private int offset;
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public Numeric(int field, int length, int offset) {
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this.field = field;
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this.length = length;
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this.offset = offset;
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}
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@Override
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public void format(TCalendar date, StringBuffer buffer) {
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int number = date.get(field) + offset;
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String str = Integer.toString(number);
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for (int i = str.length(); i < length; ++i) {
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buffer.append('0');
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}
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buffer.append(str);
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}
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@Override
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public void parse(String text, TCalendar date, TParsePosition position) {
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int num = 0;
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int i = 0;
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int pos = position.getIndex();
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while (position.getIndex() < text.length() && i < length) {
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char c = text.charAt(pos);
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if (c >= '0' && c <= '9') {
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num = num * 10 + (c - '0');
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++pos;
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++i;
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} else {
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break;
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}
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}
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if (i == 0) {
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position.setErrorIndex(position.getIndex());
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return;
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}
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position.setIndex(pos);
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date.set(field, num - offset);
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}
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}
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public static class Year extends DateFormatElement {
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private int field;
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public Year(int field) {
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this.field = field;
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}
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@Override
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public void format(TCalendar date, StringBuffer buffer) {
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int number = date.get(field);
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if (number < 10) {
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buffer.append(number);
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} else {
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buffer.append((char)((number % 100 / 10) + '0'));
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buffer.append((char)((number % 10) + '0'));
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}
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}
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@Override
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public void parse(String text, TCalendar date, TParsePosition position) {
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int num = 0;
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int pos = position.getIndex();
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char c = text.charAt(pos++);
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if (c < '0' || c > '9') {
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position.setErrorIndex(position.getErrorIndex());
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return;
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}
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num = c - '0';
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c = text.charAt(pos);
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if (c >= '0' && c <= '9') {
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num = num * 10 + (c - '0');
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++pos;
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}
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position.setIndex(pos);
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TCalendar calendar = new TGregorianCalendar();
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int currentYear = calendar.get(TCalendar.YEAR);
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int currentShortYear = currentYear % 100;
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int century = currentYear / 100;
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if (currentShortYear > 80) {
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if (num < currentShortYear - 80) {
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century++;
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}
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} else {
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if (num > currentShortYear + 20) {
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--century;
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}
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}
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date.set(field, num + century * 100);
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}
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}
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public static class ConstantText extends DateFormatElement {
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private String textConstant;
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public ConstantText(String textConstant) {
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this.textConstant = textConstant;
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}
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@Override
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public void format(TCalendar date, StringBuffer buffer) {
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buffer.append(textConstant);
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}
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@Override
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public void parse(String text, TCalendar date, TParsePosition position) {
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if (matches(text, position.getIndex(), textConstant)) {
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position.setIndex(position.getIndex() + textConstant.length());
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} else {
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position.setErrorIndex(position.getIndex());
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}
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}
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}
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}
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@ -0,0 +1,120 @@
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/*
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* Copyright 2014 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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.teavm.classlib.java.text;
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import java.util.ArrayList;
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import java.util.List;
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/**
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*
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* @author Alexey Andreev
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*/
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class SimpleDatePatternParser {
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private TDateFormatSymbols symbols;
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private List<DateFormatElement> elements = new ArrayList<>();
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private int index;
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private String pattern;
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public SimpleDatePatternParser(TDateFormatSymbols symbols) {
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this.symbols = symbols;
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}
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public void parsePattern(String pattern) {
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this.pattern = pattern;
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for (index = 0; index < pattern.length(); ++index) {
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char c = pattern.charAt(index);
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switch (c) {
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case '\'': {
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++index;
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parseQuoted();
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break;
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}
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case 'G':
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parseRepetitions();
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elements.add(new DateFormatElement.EraText(symbols));
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break;
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case 'y':
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break;
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default: {
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StringBuilder sb = new StringBuilder();
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while (index < pattern.length() && isControl(pattern.charAt(index))) {
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sb.append(pattern.charAt(index++));
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}
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break;
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}
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}
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}
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}
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private boolean isControl(char c) {
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switch (c) {
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case '\'':
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case 'G':
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case 'y':
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case 'Y':
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case 'M':
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case 'w':
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case 'W':
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case 'D':
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case 'd':
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case 'F':
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case 'E':
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case 'u':
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case 'a':
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case 'H':
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case 'k':
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case 'K':
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case 'h':
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case 'm':
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case 's':
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case 'S':
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case 'z':
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case 'Z':
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case 'X':
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return true;
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default:
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return false;
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}
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}
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private void parseQuoted() {
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StringBuilder sb = new StringBuilder();
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while (index < pattern.length()) {
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char c = pattern.charAt(index++);
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if (c == '\'') {
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if (index < pattern.length() && pattern.charAt(index) == '\'') {
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sb.append('\'');
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++index;
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} else {
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break;
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}
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} else {
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sb.append(c);
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}
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}
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elements.add(new DateFormatElement.ConstantText(sb.toString()));
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}
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private int parseRepetitions() {
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int count = 1;
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char orig = pattern.charAt(index++);
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while (index < pattern.length() && pattern.charAt(index) == orig) {
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++index;
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++count;
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}
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return count;
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}
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}
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@ -0,0 +1,55 @@
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/*
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* Copyright 2014 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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.teavm.classlib.java.text;
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import org.teavm.classlib.java.util.TCalendar;
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import org.teavm.classlib.java.util.TDate;
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import org.teavm.classlib.java.util.TGregorianCalendar;
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/**
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*
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* @author Alexey Andreev
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*/
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public class TSimpleDateFormat extends TDateFormat {
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private DateFormatElement[] elements;
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@Override
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public StringBuffer format(TDate date, StringBuffer buffer, TFieldPosition field) {
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TCalendar calendar = new TGregorianCalendar();
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calendar.setTime(date);
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for (DateFormatElement element : elements) {
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element.format(calendar, buffer);
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}
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return buffer;
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}
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@Override
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public TDate parse(String string, TParsePosition position) {
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TCalendar calendar = new TGregorianCalendar();
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calendar.set(0, 0, 0, 0, 0, 0);
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for (DateFormatElement element : elements) {
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if (position.getIndex() > string.length()) {
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position.setErrorIndex(position.getErrorIndex());
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return null;
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}
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element.parse(string, calendar, position);
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if (position.getErrorIndex() >= 0) {
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return null;
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}
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}
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return calendar.getTime();
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}
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}
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