/**
* 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.camel.processor;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.Processor;
import org.apache.camel.util.ExpressionComparator;
import org.apache.camel.util.ExpressionListComparator;
/**
* An implementation of the <a href="http://camel.apache.org/resequencer.html">Resequencer</a>
* which can reorder messages within a batch.
*
* @version $Revision: 788621 $
*/
public class Resequencer extends BatchProcessor implements Traceable {
public Resequencer(Processor processor, Expression expression) {
this(processor, createSet(expression));
}
public Resequencer(Processor processor, List<Expression> expressions) {
this(processor, createSet(expressions));
}
public Resequencer(Processor processor, Set<Exchange> collection) {
super(processor, collection);
}
@Override
public String toString() {
return "Resequencer[to: " + getProcessor() + "]";
}
public String getTraceLabel() {
return "Resequence";
}
// Implementation methods
//-------------------------------------------------------------------------
protected static Set<Exchange> createSet(Expression expression) {
return createSet(new ExpressionComparator(expression));
}
protected static Set<Exchange> createSet(List<Expression> expressions) {
if (expressions.size() == 1) {
return createSet(expressions.get(0));
}
return createSet(new ExpressionListComparator(expressions));
}
protected static Set<Exchange> createSet(Comparator<? super Exchange> comparator) {
return new TreeSet<Exchange>(comparator);
}
}