| /** |
| * 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.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Expression; |
| import org.apache.camel.Message; |
| import org.apache.camel.Processor; |
| import org.apache.camel.processor.aggregate.AggregationStrategy; |
| import org.apache.camel.util.CollectionHelper; |
| import org.apache.camel.util.ObjectHelper; |
| |
| import static org.apache.camel.util.ObjectHelper.notNull; |
| |
| /** |
| * Implements a dynamic <a |
| * href="http://camel.apache.org/splitter.html">Splitter</a> pattern |
| * where an expression is evaluated to iterate through each of the parts of a |
| * message and then each part is then send to some endpoint. |
| * |
| * @version $Revision$ |
| */ |
| public class Splitter extends MulticastProcessor implements Processor { |
| private final Expression expression; |
| |
| public Splitter(Expression expression, Processor destination, AggregationStrategy aggregationStrategy) { |
| this(expression, destination, aggregationStrategy, false, null, false); |
| } |
| |
| public Splitter(Expression expression, Processor destination, AggregationStrategy aggregationStrategy, |
| boolean parallelProcessing, ExecutorService executorService, boolean streaming) { |
| super(Collections.singleton(destination), aggregationStrategy, parallelProcessing, executorService, streaming); |
| |
| this.expression = expression; |
| notNull(expression, "expression"); |
| notNull(destination, "destination"); |
| } |
| |
| @Override |
| public String toString() { |
| return "Splitter[on: " + expression + " to: " + getProcessors().iterator().next() + " aggregate: " + getAggregationStrategy() + "]"; |
| } |
| |
| @Override |
| protected Iterable<ProcessorExchangePair> createProcessorExchangePairs(Exchange exchange) { |
| Object value = expression.evaluate(exchange, Object.class); |
| |
| if (isStreaming()) { |
| return createProcessorExchangePairsIterable(exchange, value); |
| } else { |
| return createProcessorExchangePairsList(exchange, value); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| private Iterable<ProcessorExchangePair> createProcessorExchangePairsIterable(final Exchange exchange, Object value) { |
| final Iterator iterator = ObjectHelper.createIterator(value); |
| return new Iterable() { |
| |
| public Iterator iterator() { |
| return new Iterator() { |
| |
| public boolean hasNext() { |
| return iterator.hasNext(); |
| } |
| |
| public Object next() { |
| Object part = iterator.next(); |
| Exchange newExchange = exchange.copy(); |
| if (part instanceof Message) { |
| newExchange.setIn((Message)part); |
| } else { |
| Message in = newExchange.getIn(); |
| in.setBody(part); |
| } |
| return new ProcessorExchangePair(getProcessors().iterator().next(), newExchange); |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException("Remove is not supported by this iterator"); |
| } |
| }; |
| } |
| |
| }; |
| } |
| |
| private Iterable<ProcessorExchangePair> createProcessorExchangePairsList(Exchange exchange, Object value) { |
| List<ProcessorExchangePair> result; |
| Integer collectionSize = CollectionHelper.size(value); |
| if (collectionSize != null) { |
| result = new ArrayList<ProcessorExchangePair>(collectionSize); |
| } else { |
| result = new ArrayList<ProcessorExchangePair>(); |
| } |
| Iterator iter = ObjectHelper.createIterator(value); |
| while (iter.hasNext()) { |
| Object part = iter.next(); |
| Exchange newExchange = exchange.copy(); |
| if (part instanceof Message) { |
| newExchange.setIn((Message)part); |
| } else { |
| Message in = newExchange.getIn(); |
| in.setBody(part); |
| } |
| result.add(new ProcessorExchangePair(getProcessors().iterator().next(), newExchange)); |
| } |
| return result; |
| } |
| |
| @Override |
| protected void updateNewExchange(Exchange exchange, int index, Iterable<ProcessorExchangePair> allPairs) { |
| super.updateNewExchange(exchange, index, allPairs); |
| exchange.getIn().setHeader(Exchange.SPLIT_INDEX, index); |
| if (allPairs instanceof Collection) { |
| exchange.getIn().setHeader(Exchange.SPLIT_SIZE, ((Collection) allPairs).size()); |
| } |
| } |
| |
| public Expression getExpression() { |
| return expression; |
| } |
| } |