/*
* 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.translate;
import java.io.IOException;
import java.io.Writer;
import org.apache.commons.lang3.ArrayUtils;
/**
* Executes a sequence of translators one after the other. Execution ends whenever
* the first translator consumes codepoints from the input.
*
* @since 3.0
* @version $Id: AggregateTranslator.java 1088899 2011-04-05 05:31:27Z bayard $
*/
public class AggregateTranslator extends CharSequenceTranslator {
private final CharSequenceTranslator[] translators;
/**
* Specify the translators to be used at creation time.
*
* @param translators CharSequenceTranslator array to aggregate
*/
public AggregateTranslator(CharSequenceTranslator... translators) {
this.translators = ArrayUtils.clone(translators);
}
/**
* The first translator to consume codepoints from the input is the 'winner'.
* Execution stops with the number of consumed codepoints being returned.
* {@inheritDoc}
*/
@Override
public int translate(CharSequence input, int index, Writer out) throws IOException {
for (CharSequenceTranslator translator : translators) {
int consumed = translator.translate(input, index, out);
if(consumed != 0) {
return consumed;
}
}
return 0;
}
}
|