spring AbstractNumberFormatter 源码
spring AbstractNumberFormatter 代码
文件路径：/spring-context/src/main/java/org/springframework/format/number/AbstractNumberFormatter.java
/*
* Copyright 2002-2012 the original author or authors.
*
* 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
*
* https://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.springframework.format.number;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.util.Locale;
import org.springframework.format.Formatter;
/**
* Abstract formatter for Numbers,
* providing a {@link #getNumberFormat(java.util.Locale)} template method.
*
* @author Juergen Hoeller
* @author Keith Donald
* @since 3.0
*/
public abstract class AbstractNumberFormatter implements Formatter<Number> {
private boolean lenient = false;
/**
* Specify whether parsing is to be lenient. Default is {@code false}.
* <p>With lenient parsing, the parser may allow inputs that do not precisely match the format.
* With strict parsing, inputs must match the format exactly.
*/
public void setLenient(boolean lenient) {
this.lenient = lenient;
}
@Override
public String print(Number number, Locale locale) {
return getNumberFormat(locale).format(number);
}
@Override
public Number parse(String text, Locale locale) throws ParseException {
NumberFormat format = getNumberFormat(locale);
ParsePosition position = new ParsePosition(0);
Number number = format.parse(text, position);
if (position.getErrorIndex() != -1) {
throw new ParseException(text, position.getIndex());
}
if (!this.lenient) {
if (text.length() != position.getIndex()) {
// indicates a part of the string that was not parsed
throw new ParseException(text, position.getIndex());
}
}
return number;
}
/**
* Obtain a concrete NumberFormat for the specified locale.
* @param locale the current locale
* @return the NumberFormat instance (never {@code null})
*/
protected abstract NumberFormat getNumberFormat(Locale locale);
}
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