/**
* 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.model;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementRef;
import javax.xml.bind.annotation.XmlRootElement;
import org.apache.camel.Predicate;
import org.apache.camel.Processor;
import org.apache.camel.builder.ExpressionClause;
import org.apache.camel.processor.ChoiceProcessor;
import org.apache.camel.processor.FilterProcessor;
import org.apache.camel.spi.RouteContext;
import org.apache.camel.util.CollectionStringBuffer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Represents an XML <choice/> element
*
* @version $Revision: 719980 $
*/
@XmlRootElement(name = "choice")
@XmlAccessorType(XmlAccessType.FIELD)
public class ChoiceType extends ProcessorType<ChoiceType> {
private static final transient Log LOG = LogFactory.getLog(ChoiceType.class);
@XmlElementRef
private List<WhenType> whenClauses = new ArrayList<WhenType>();
@XmlElement(required = false)
private OtherwiseType otherwise;
@Override
public String toString() {
if (getOtherwise() != null) {
return "Choice[" + getWhenClauses() + " " + getOtherwise() + "]";
} else {
return "Choice[" + getWhenClauses() + "]";
}
}
@Override
public String getShortName() {
return "choice";
}
@Override
public Processor createProcessor(RouteContext routeContext) throws Exception {
List<FilterProcessor> filters = new ArrayList<FilterProcessor>();
for (WhenType whenClaus : whenClauses) {
filters.add(whenClaus.createProcessor(routeContext));
}
Processor otherwiseProcessor = null;
if (otherwise != null) {
otherwiseProcessor = otherwise.createProcessor(routeContext);
} else {
LOG.warn("No otherwise clause was specified for a choice block -- any unmatched exchanges will be dropped");
}
return new ChoiceProcessor(filters, otherwiseProcessor);
}
// Fluent API
// -------------------------------------------------------------------------
public ChoiceType when(Predicate predicate) {
getWhenClauses().add(new WhenType(predicate));
return this;
}
public ExpressionClause<ChoiceType> when() {
WhenType when = new WhenType();
getWhenClauses().add(when);
ExpressionClause<ChoiceType> clause = new ExpressionClause<ChoiceType>(this);
when.setExpression(clause);
return clause;
}
public ChoiceType otherwise() {
OtherwiseType answer = new OtherwiseType();
setOtherwise(answer);
return this;
}
// Properties
// -------------------------------------------------------------------------
@Override
public String getLabel() {
CollectionStringBuffer buffer = new CollectionStringBuffer();
List<WhenType> list = getWhenClauses();
for (WhenType whenType : list) {
buffer.append(whenType.getLabel());
}
return buffer.toString();
}
public List<WhenType> getWhenClauses() {
return whenClauses;
}
public void setWhenClauses(List<WhenType> whenClauses) {
this.whenClauses = whenClauses;
}
public List<ProcessorType<?>> getOutputs() {
if (otherwise != null) {
return otherwise.getOutputs();
} else if (whenClauses.isEmpty()) {
return Collections.EMPTY_LIST;
} else {
WhenType when = whenClauses.get(whenClauses.size() - 1);
return when.getOutputs();
}
}
public OtherwiseType getOtherwise() {
return otherwise;
}
public void setOtherwise(OtherwiseType otherwise) {
this.otherwise = otherwise;
}
}