org.joda.money.format.AmountPrinterParser Maven / Gradle / Ivy
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/*
* Copyright 2009-present, Stephen Colebourne
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.joda.money.format;
import java.io.IOException;
import java.io.Serializable;
import java.math.BigDecimal;
import org.joda.money.BigMoney;
/**
* Prints and parses the amount part of the money.
*
* This class is immutable and thread-safe.
*/
final class AmountPrinterParser implements MoneyPrinter, MoneyParser, Serializable {
/** Serialization version. */
private static final long serialVersionUID = 1L;
/** The style to use. */
private final MoneyAmountStyle style;
/**
* Constructor.
* @param style the style, not null
*/
AmountPrinterParser(MoneyAmountStyle style) {
this.style = style;
}
//-----------------------------------------------------------------------
@Override
public void print(MoneyPrintContext context, Appendable appendable, BigMoney money) throws IOException {
MoneyAmountStyle activeStyle = style.localize(context.getLocale());
if (money.isNegative()) {
money = money.negated();
if (!activeStyle.isAbsValue()) {
appendable.append(activeStyle.getNegativeSignCharacter());
}
}
String str = money.getAmount().toPlainString();
char zeroChar = activeStyle.getZeroCharacter();
if (zeroChar != '0') {
int diff = zeroChar - '0';
StringBuilder zeroConvert = new StringBuilder(str);
for (int i = 0; i < str.length(); i++) {
char ch = str.charAt(i);
if (ch >= '0' && ch <= '9') {
zeroConvert.setCharAt(i, (char) (ch + diff));
}
}
str = zeroConvert.toString();
}
final int decPoint = str.indexOf('.');
final int afterDecPoint = decPoint + 1;
if (activeStyle.getGroupingStyle() == GroupingStyle.NONE) {
if (decPoint < 0) {
appendable.append(str);
if (activeStyle.isForcedDecimalPoint()) {
appendable.append(activeStyle.getDecimalPointCharacter());
}
} else {
appendable.append(str.subSequence(0, decPoint))
.append(activeStyle.getDecimalPointCharacter()).append(str.substring(afterDecPoint));
}
} else {
int groupingSize = activeStyle.getGroupingSize();
int extendedGroupingSize = activeStyle.getExtendedGroupingSize();
extendedGroupingSize = extendedGroupingSize == 0 ? groupingSize : extendedGroupingSize;
char groupingChar = activeStyle.getGroupingCharacter();
int pre = (decPoint < 0 ? str.length() : decPoint);
int post = (decPoint < 0 ? 0 : str.length() - decPoint - 1);
appendable.append(str.charAt(0));
for (int i = 1; i < pre; i++) {
if (isPreGroupingPoint(pre - i, groupingSize, extendedGroupingSize)) {
appendable.append(groupingChar);
}
appendable.append(str.charAt(i));
}
if (decPoint >= 0 || activeStyle.isForcedDecimalPoint()) {
appendable.append(activeStyle.getDecimalPointCharacter());
}
if (activeStyle.getGroupingStyle() == GroupingStyle.BEFORE_DECIMAL_POINT) {
if (decPoint >= 0) {
appendable.append(str.substring(afterDecPoint));
}
} else {
for (int i = 0; i < post; i++) {
appendable.append(str.charAt(i + afterDecPoint));
if (isPostGroupingPoint(i, post, groupingSize, extendedGroupingSize)) {
appendable.append(groupingChar);
}
}
}
}
}
private boolean isPreGroupingPoint(int remaining, int groupingSize, int extendedGroupingSize) {
if (remaining >= groupingSize + extendedGroupingSize) {
return (remaining - groupingSize) % extendedGroupingSize == 0;
}
return remaining % groupingSize == 0;
}
private boolean isPostGroupingPoint(int i, int post, int groupingSize, int extendedGroupingSize) {
boolean atEnd = (i + 1) >= post;
if (i > groupingSize) {
return (i - groupingSize) % extendedGroupingSize == (extendedGroupingSize - 1) && !atEnd;
}
return i % groupingSize == (groupingSize - 1) && !atEnd;
}
@Override
public void parse(MoneyParseContext context) {
final int len = context.getTextLength();
final MoneyAmountStyle activeStyle = style.localize(context.getLocale());
char[] buf = new char[len - context.getIndex()];
int bufPos = 0;
boolean dpSeen = false;
int pos = context.getIndex();
if (pos < len) {
char ch = context.getText().charAt(pos++);
if (ch == activeStyle.getNegativeSignCharacter()) {
buf[bufPos++] = '-';
} else if (ch == activeStyle.getPositiveSignCharacter()) {
buf[bufPos++] = '+';
} else if (ch >= activeStyle.getZeroCharacter() && ch < activeStyle.getZeroCharacter() + 10) {
buf[bufPos++] = (char) ('0' + ch - activeStyle.getZeroCharacter());
} else if (ch == activeStyle.getDecimalPointCharacter()) {
buf[bufPos++] = '.';
dpSeen = true;
} else {
context.setError();
return;
}
}
boolean lastWasGroup = false;
for ( ; pos < len; pos++) {
char ch = context.getText().charAt(pos);
if (ch >= activeStyle.getZeroCharacter() && ch < activeStyle.getZeroCharacter() + 10) {
buf[bufPos++] = (char) ('0' + ch - activeStyle.getZeroCharacter());
lastWasGroup = false;
} else if (ch == activeStyle.getDecimalPointCharacter() && dpSeen == false) {
buf[bufPos++] = '.';
dpSeen = true;
lastWasGroup = false;
} else if (ch == activeStyle.getGroupingCharacter() && lastWasGroup == false) {
lastWasGroup = true;
} else {
break;
}
}
if (lastWasGroup) {
pos--;
}
try {
context.setAmount(new BigDecimal(buf, 0, bufPos));
context.setIndex(pos);
} catch (NumberFormatException ex) {
context.setError();
}
}
@Override
public String toString() {
return "${amount}";
}
}