/*
* 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.SynapseException;
import org.apache.synapse.mediators.MediatorProperty;
import org.jaxen.JaxenException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* A utility class capable of creating instances of MediatorProperty objects by reading
* through a given XML configuration
*
* <pre>
* <element>
* <property name="string" (value="literal" | expression="xpath")/>*
* </element>
* </pre>
*/
public class MediatorPropertyFactory {
private static final Log log = LogFactory.getLog(MediatorPropertyFactory.class);
public static List<MediatorProperty> getMediatorProperties(OMElement elem) {
List<MediatorProperty> propertyList = new ArrayList<MediatorProperty>();
Iterator iter = elem.getChildrenWithName(MediatorProperty.PROPERTY_Q);
while (iter.hasNext()) {
OMElement propEle = (OMElement) iter.next();
OMAttribute attName = propEle.getAttribute(MediatorProperty.ATT_NAME_Q);
OMAttribute attValue = propEle.getAttribute(MediatorProperty.ATT_VALUE_Q);
OMAttribute attExpr = propEle.getAttribute(MediatorProperty.ATT_EXPR_Q);
MediatorProperty prop = new MediatorProperty();
if (attName == null || attName.getAttributeValue() == null ||
attName.getAttributeValue().trim().length() == 0) {
String msg = "Entry name is a required attribute for a Log property";
log.error(msg);
throw new SynapseException(msg);
} else {
prop.setName(attName.getAttributeValue());
}
// if a value is specified, use it, else look for an expression
if (attValue != null) {
if (attValue.getAttributeValue() == null ||
attValue.getAttributeValue().trim().length() == 0) {
String msg = "Entry attribute value (if specified) " +
"is required for a Log property";
log.error(msg);
throw new SynapseException(msg);
} else {
prop.setValue(attValue.getAttributeValue());
}
} else if (attExpr != null) {
if (attExpr.getAttributeValue() == null ||
attExpr.getAttributeValue().trim().length() == 0) {
String msg = "Entry attribute expression (if specified) " +
"is required for a mediator property";
log.error(msg);
throw new SynapseException(msg);
} else {
try {
prop.setExpression(SynapseXPathFactory.getSynapseXPath(
propEle, MediatorProperty.ATT_EXPR_Q));
} catch (JaxenException e) {
String msg = "Invalid XPapth expression : " + attExpr.getAttributeValue();
log.error(msg);
throw new SynapseException(msg, e);
}
}
} else {
String msg = "Entry attribute value OR expression must " +
"be specified for a mediator property";
log.error(msg);
throw new SynapseException(msg);
}
propertyList.add(prop);
}
return propertyList;
}
}