SynapsePathFactory.java
/*
* 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.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.SynapseConstants;
import org.apache.synapse.SynapseException;
import org.apache.synapse.config.SynapsePropertiesLoader;
import org.apache.synapse.util.xpath.SynapseJsonPath;
import org.apache.synapse.util.xpath.SynapseXPath;
import org.jaxen.JaxenException;
import javax.xml.namespace.QName;
/**
*
*/
public class SynapsePathFactory {
private static final Log log = LogFactory.getLog(SynapsePathFactory.class);
public static SynapsePath getSynapsePath(OMElement elem, QName attribName)
throws JaxenException {
SynapsePath path = null;
OMAttribute pathAttrib = elem.getAttribute(attribName);
if (pathAttrib != null && pathAttrib.getAttributeValue() != null) {
if(pathAttrib.getAttributeValue().startsWith("json-eval(")) {
path = new SynapseJsonPath(pathAttrib.getAttributeValue().substring(10, pathAttrib.getAttributeValue().length() - 1));
} else {
try {
path = new SynapseXPath(pathAttrib.getAttributeValue());
} catch (org.jaxen.XPathSyntaxException ex) {
/* Try and see whether the expression can be compiled with XPath 2.0
* This will only be done if the failover DOM XPath 2.0 is enabled */
if (Boolean.parseBoolean(SynapsePropertiesLoader.loadSynapseProperties().
getProperty(SynapseConstants.FAIL_OVER_DOM_XPATH_PROCESSING))) {
if(log.isDebugEnabled()) {
log.debug(
"Trying to compile the expression in XPath 2.0: " + pathAttrib.getAttributeValue());
}
path = new SynapseXPath(pathAttrib.getAttributeValue(), elem);
} else {
throw ex;
}
}
}
OMElementUtils.addNameSpaces(path, elem, log);
path.addNamespacesForFallbackProcessing(elem);
} else {
handleException("Couldn't find the XPath attribute with the QName : "
+ attribName.toString() + " in the element : " + elem.toString());
}
return path;
}
public static SynapsePath getSynapsePathfromExpression(OMElement elem, String expression) throws JaxenException {
SynapsePath path = null;
if (expression != null) {
if (expression.startsWith("json-eval(")) {
path = new SynapseJsonPath(expression.substring(10, expression.length() - 1));
} else {
try {
path = new SynapseXPath(expression);
} catch (org.jaxen.XPathSyntaxException ex) {
/* Try and see whether the expression can be compiled with XPath 2.0
* This will only be done if the failover DOM XPath 2.0 is enabled */
if (Boolean.parseBoolean(SynapsePropertiesLoader.loadSynapseProperties().
getProperty(SynapseConstants.FAIL_OVER_DOM_XPATH_PROCESSING))) {
if (log.isDebugEnabled()) {
log.debug("Trying to compile the expression in XPath 2.0: " + expression);
}
path = new SynapseXPath(expression, elem);
} else {
throw ex;
}
}
}
OMElementUtils.addNameSpaces(path, elem, log);
path.addNamespacesForFallbackProcessing(elem);
} else {
handleException("Couldn't find the XPath expression");
}
return path;
}
public static SynapsePath getSynapsePath(OMElement elem, String expression)
throws JaxenException {
if (expression == null) {
handleException("XPath expression cannot be null");
}
SynapseXPath xpath = new SynapseXPath(expression);
OMElementUtils.addNameSpaces(xpath, elem, log);
return xpath;
}
private static void handleException(String message) {
log.error(message);
throw new SynapseException(message);
}
}