/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.commons.lang3.text;
import java.text.FieldPosition;
import java.text.Format;
import java.text.ParseException;
import java.text.ParsePosition;
/**
* Formats using one formatter and parses using a different formatter. An
* example of use for this would be a webapp where data is taken in one way and
* stored in a database another way.
*
* @version $Id: CompositeFormat.java 1088899 2011-04-05 05:31:27Z bayard $
*/
public class CompositeFormat extends Format {
/**
* Required for serialization support.
*
* @see java.io.Serializable
*/
private static final long serialVersionUID = -4329119827877627683L;
/** The parser to use. */
private final Format parser;
/** The formatter to use. */
private final Format formatter;
/**
* Create a format that points its parseObject method to one implementation
* and its format method to another.
*
* @param parser implementation
* @param formatter implementation
*/
public CompositeFormat(Format parser, Format formatter) {
this.parser = parser;
this.formatter = formatter;
}
/**
* Uses the formatter Format instance.
*
* @param obj the object to format
* @param toAppendTo the {@link StringBuffer} to append to
* @param pos the FieldPosition to use (or ignore).
* @return <code>toAppendTo</code>
* @see Format#format(Object, StringBuffer, FieldPosition)
*/
@Override
public StringBuffer format(Object obj, StringBuffer toAppendTo,
FieldPosition pos) {
return formatter.format(obj, toAppendTo, pos);
}
/**
* Uses the parser Format instance.
*
* @param source the String source
* @param pos the ParsePosition containing the position to parse from, will
* be updated according to parsing success (index) or failure
* (error index)
* @return the parsed Object
* @see Format#parseObject(String, ParsePosition)
*/
@Override
public Object parseObject(String source, ParsePosition pos) {
return parser.parseObject(source, pos);
}
/**
* Provides access to the parser Format implementation.
*
* @return parser Format implementation
*/
public Format getParser() {
return this.parser;
}
/**
* Provides access to the parser Format implementation.
*
* @return formatter Format implementation
*/
public Format getFormatter() {
return this.formatter;
}
/**
* Utility method to parse and then reformat a String.
*
* @param input String to reformat
* @return A reformatted String
* @throws ParseException thrown by parseObject(String) call
*/
public String reformat(String input) throws ParseException {
return format(parseObject(input));
}
}
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