/*
* 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.config.xml;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.xpath.AXIOMXPath;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.SynapseException;
import org.apache.synapse.Mediator;
import org.apache.synapse.mediators.filters.FilterMediator;
import org.jaxen.JaxenException;
import javax.xml.namespace.QName;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/**
* Creates a filter mediator instance
*
* <pre>
* <filter (source="xpath" regex="string") | xpath="xpath">
* mediator+
* </filter>
* </pre>
*/
public class FilterMediatorFactory extends AbstractListMediatorFactory {
private static final Log log = LogFactory.getLog(FaultMediatorFactory.class);
private static final QName FILTER_Q = new QName(Constants.SYNAPSE_NAMESPACE, "filter");
public Mediator createMediator(OMElement elem) {
FilterMediator filter = new FilterMediator();
super.addChildren(elem, filter);
OMAttribute attXpath = elem.getAttribute(new QName(Constants.NULL_NAMESPACE, "xpath"));
OMAttribute attSource = elem.getAttribute(new QName(Constants.NULL_NAMESPACE, "source"));
OMAttribute attRegex = elem.getAttribute(new QName(Constants.NULL_NAMESPACE, "regex"));
if (attXpath != null) {
if (attXpath.getAttributeValue() != null && attXpath.getAttributeValue().trim().length() == 0) {
String msg = "Invalid attribute value specified for xpath";
log.error(msg);
throw new SynapseException(msg);
} else {
try {
filter.setXpath(new AXIOMXPath(attXpath.getAttributeValue()));
} catch (JaxenException e) {
String msg = "Invalid XPath expression for attribute xpath : " + attXpath.getAttributeValue();
log.error(msg);
throw new SynapseException(msg);
}
}
OMElementUtils.addNameSpaces(filter.getXpath(), elem, log);
} else if (attSource != null && attRegex != null) {
if (
(attSource.getAttributeValue() != null && attSource.getAttributeValue().trim().length() == 0) ||
(attRegex.getAttributeValue() != null && attRegex.getAttributeValue().trim().length() == 0) ){
String msg = "Invalid attribute values for source and/or regex specified";
log.error(msg);
throw new SynapseException(msg);
} else {
try {
filter.setSource(new AXIOMXPath(attSource.getAttributeValue()));
} catch (JaxenException e) {
String msg = "Invalid XPath expression for attribute source : " + attSource.getAttributeValue();
log.error(msg);
throw new SynapseException(msg);
}
try {
filter.setRegex(Pattern.compile(attRegex.getAttributeValue()));
} catch (PatternSyntaxException pse) {
String msg = "Invalid Regular Expression for attribute regex : " + attRegex.getAttributeValue();
log.error(msg);
throw new SynapseException(msg);
}
}
OMElementUtils.addNameSpaces(filter.getSource(), elem, log);
} else {
String msg = "An xpath or (source, regex) attributes are required for a filter";
log.error(msg);
throw new SynapseException(msg);
}
return filter;
}
public QName getTagQName() {
return FILTER_Q;
}
}