/*
* 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.synapse.commons.evaluators.config;
import org.apache.synapse.commons.evaluators.Evaluator;
import org.apache.synapse.commons.evaluators.OrEvaluator;
import org.apache.synapse.commons.evaluators.EvaluatorException;
import org.apache.axiom.om.OMElement;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
/**
* This factory creates a {@link OrFactory} using the following XML configuration.</p>
*
* <pre>
* <or>
* two or more evaluators
* </or>
* </pre>
*/
public class OrFactory implements EvaluatorFactory {
private Log log = LogFactory.getLog(OrFactory.class);
public Evaluator create(OMElement e) throws EvaluatorException {
OrEvaluator o = new OrEvaluator();
Iterator it = e.getChildElements();
List<Evaluator> evaluators = new ArrayList<Evaluator>();
while (it.hasNext()) {
OMElement evaluatorElement = (OMElement) it.next();
EvaluatorFactory ef = EvaluatorFactoryFinder.getInstance().
findEvaluatorFactory(evaluatorElement.getLocalName());
if (ef == null) {
handleException("Invalid configuration element: " +
evaluatorElement.getLocalName());
return null;
}
Evaluator evaluator = ef.create(evaluatorElement);
evaluators.add(evaluator);
}
if (evaluators.size() > 1) {
o.setEvaluators(evaluators.toArray(new Evaluator[evaluators.size()]));
} else {
handleException("Two or more expressions " +
"should be provided under Or");
return null;
}
return o;
}
private void handleException(String message) throws EvaluatorException {
log.error(message);
throw new EvaluatorException(message);
}
}