/**
* Copyright (c) 2008, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* Licensed 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.wso2.carbon.mediator.xslt;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMElement;
import org.apache.synapse.config.xml.*;
import org.apache.synapse.mediators.Value;
import org.apache.synapse.util.xpath.SynapseXPath;
import org.jaxen.JaxenException;
import org.wso2.carbon.mediator.service.MediatorException;
import org.wso2.carbon.mediator.service.ui.AbstractMediator;
import org.wso2.carbon.mediator.service.util.MediatorProperty;
import javax.xml.namespace.QName;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class XSLTMediator extends AbstractMediator {
private static final QName ATTRIBUTE_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "attribute");
private Value xsltKey = null;
private SynapseXPath source = null;
private String targetPropertyName = null;
private final List<MediatorProperty> properties = new ArrayList<MediatorProperty>();
private final List<MediatorProperty> transformerFactoryFeatures =
new ArrayList<MediatorProperty>();
private final List<MediatorProperty> transformerFactoryAttributes
= new ArrayList<MediatorProperty>();
Map<String, String> resources = new HashMap<String, String>();
public String getTagLocalName() {
return "xslt";
}
public OMElement serialize(OMElement parent) {
OMElement xslt = fac.createOMElement("xslt", synNS);
if (xsltKey != null) {
// Use KeySerializer to serialize Key
ValueSerializer keySerializer = new ValueSerializer();
keySerializer.serializeValue(xsltKey, XMLConfigConstants.KEY, xslt);
} else {
throw new MediatorException("Invalid XSLT mediator. XSLT registry key is required");
}
saveTracingState(xslt, this);
if (source != null) {
SynapseXPathSerializer.serializeXPath(source, xslt, "source");
}
if (targetPropertyName != null) {
xslt.addAttribute(fac.createOMAttribute(
"target", nullNS, targetPropertyName));
}
serializeMediatorProperties(xslt, properties, PROP_Q);
if (!transformerFactoryFeatures.isEmpty()) {
for (MediatorProperty mp : transformerFactoryFeatures) {
OMElement prop = fac.createOMElement("feature", synNS, xslt);
if (mp.getName() != null) {
prop.addAttribute(fac.createOMAttribute("name", nullNS, mp.getName()));
} else {
throw new MediatorException("The Feature name is missing");
}
if (mp.getValue() != null) {
prop.addAttribute(fac.createOMAttribute("value", nullNS, mp.getValue()));
} else {
throw new MediatorException("The Feature value is missing");
}
}
}
serializeMediatorProperties(xslt, transformerFactoryAttributes, ATTRIBUTE_Q);
if (resources.size() > 0) {
OMElement resource;
Set resourceKeys = resources.keySet();
for (Iterator i = resourceKeys.iterator(); i.hasNext();) {
String key = i.next().toString();
String value = resources.get(key);
resource = fac.createOMElement("resource", synNS);
resource.addAttribute("location", key, nullNS);
resource.addAttribute("key", value, nullNS);
xslt.addChild(resource);
}
}
if (parent != null) {
parent.addChild(xslt);
}
return xslt;
}
public void build(OMElement elem) {
OMAttribute attXslt = elem.getAttribute(ATT_KEY);
OMAttribute attSource = elem.getAttribute(ATT_SOURCE);
OMAttribute attTarget = elem.getAttribute(ATT_TARGET);
QName ATT_RESOURCE_QNAME = new QName("resource");
Iterator itr = elem.getChildrenWithName(ATT_RESOURCE_QNAME);
Map<String, String> xsltResourecMap = new HashMap<String, String>();
while (itr.hasNext()) {
OMElement resourceElement = (OMElement) itr.next();
QName ATT_RESOURCE_LOCATION_QNAME = new QName("location");
QName ATT_RESOURCE_KEY_QNAME = new QName("key");
OMAttribute locationAttr = resourceElement.getAttribute(ATT_RESOURCE_LOCATION_QNAME);
OMAttribute keyAttr = resourceElement.getAttribute(ATT_RESOURCE_KEY_QNAME);
xsltResourecMap.put(locationAttr.getAttributeValue(), keyAttr.getAttributeValue());
}
this.resources = xsltResourecMap;
if (attXslt != null) {
//Use KeyFactory to create Key
ValueFactory keyFactory = new ValueFactory();
xsltKey = keyFactory.createValue(XMLConfigConstants.KEY, elem);
} else {
throw new MediatorException("The 'key' attribute is required for the XSLT mediator");
}
if (attSource != null) {
try {
source = SynapseXPathFactory.getSynapseXPath(elem, ATT_SOURCE);
} catch (JaxenException e) {
throw new MediatorException("Invalid XPath specified for the source attribute : " +
attSource.getAttributeValue());
}
}
if (attTarget != null) {
targetPropertyName = attTarget.getAttributeValue();
}
// after successfully creating the mediator
// set its common attributes such as tracing etc
processAuditStatus(this, elem);
// set the features
for (Map.Entry<String,String> entry : collectNameValuePairs(elem, FEATURE_Q).entrySet()) {
String value = entry.getValue();
boolean isFeatureEnabled;
if ("true".equals(value)) {
isFeatureEnabled = true;
} else if ("false".equals(value)) {
isFeatureEnabled = false;
} else {
throw new MediatorException("The feature must have value true or false");
}
addFeature(entry.getKey(), isFeatureEnabled);
}
for (Map.Entry<String,String> entry : collectNameValuePairs(elem, ATTRIBUTE_Q).entrySet()) {
addAttribute(entry.getKey(), entry.getValue());
}
properties.addAll(getMediatorProperties(elem));
}
public void addFeature(String featureName, boolean isFeatureEnable) {
MediatorProperty mp = new MediatorProperty();
mp.setName(featureName);
if (isFeatureEnable) {
mp.setValue("true");
} else {
mp.setValue("false");
}
transformerFactoryFeatures.add(mp);
}
public void addAttribute(String name, String value) {
MediatorProperty mp = new MediatorProperty();
mp.setName(name);
mp.setValue(value);
transformerFactoryAttributes.add(mp);
}
public List<MediatorProperty> getFeatures(){
return transformerFactoryFeatures;
}
/**
* @return Return the attributes explicitly set to the TransformerFactory through this mediator.
*/
public List<MediatorProperty> getAttributes(){
return transformerFactoryAttributes;
}
public void addAllProperties(List<MediatorProperty> list) {
properties.addAll(list);
}
public List<MediatorProperty> getProperties() {
return properties;
}
public String getTargetPropertyName() {
return targetPropertyName;
}
public void setTargetPropertyName(String targetPropertyName) {
this.targetPropertyName = targetPropertyName;
}
public SynapseXPath getSource() {
return source;
}
public void setSource(SynapseXPath source) {
this.source = source;
}
public Value getXsltKey() {
return xsltKey;
}
public void setXsltKey(Value xsltKey) {
this.xsltKey = xsltKey;
}
public void addProperty(MediatorProperty p) {
properties.add(p);
}
public void setResources(Map<String,String> resources) {
this.resources = resources;
}
public Map<String,String> getResources() {
return resources;
}
}