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Axis2 Data Binding module
/*
* 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.axis2.databinding.utils;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.om.OMText;
import org.apache.axiom.om.impl.builder.StAXOMBuilder;
import org.apache.axiom.soap.SOAPBody;
import org.apache.axiom.soap.SOAPEnvelope;
import org.apache.axis2.AxisFault;
import org.apache.axis2.databinding.typemapping.SimpleTypeMapper;
import org.apache.axis2.engine.ObjectSupplier;
import javax.xml.namespace.QName;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class MultirefHelper {
public static final String SOAP12_REF_ATTR = "ref";
public static final String SOAP11_REF_ATTR = "href";
private boolean filledTable;
private OMElement parent;
private HashMap objectmap = new HashMap();
private HashMap elementMap = new HashMap();
private HashMap omElementMap = new HashMap();
public MultirefHelper(OMElement parent) {
this.parent = parent;
}
public Object getObject(String id) {
return objectmap.get(id);
}
public OMElement getOMElement(String id) {
return (OMElement)omElementMap.get(id);
}
public OMElement processOMElementRef(String id) throws AxisFault {
if (!filledTable) {
readallChildElements();
}
OMElement val = (OMElement)elementMap.get(id);
if (val == null) {
throw new AxisFault("Invalid reference :" + id);
} else {
OMElement ele = processElementforRefs(val);
OMElement cloneele = elementClone(ele);
omElementMap.put(id, cloneele);
return cloneele;
}
}
public OMElement processElementforRefs(OMElement elemnts) throws AxisFault {
Iterator itr = elemnts.getChildElements();
while (itr.hasNext()) {
OMElement omElement = (OMElement)itr.next();
OMAttribute attri = processRefAtt(omElement);
if (attri != null) {
String ref = getAttvalue(attri);
OMElement tempele = getOMElement(ref);
if (tempele == null) {
tempele = processOMElementRef(ref);
}
OMElement ele2 = elementClone(tempele);
Iterator itrChild = ele2.getChildren();
while (itrChild.hasNext()) {
Object obj = itrChild.next();
if (obj instanceof OMNode) {
itrChild.remove();
omElement.addChild((OMNode)obj);
}
}
}
}
return elemnts;
}
private OMElement elementClone(OMElement ele) {
return new StAXOMBuilder(ele.getXMLStreamReader()).getDocumentElement();
}
public Object processRef(Class javatype, String id, ObjectSupplier objectSupplier)
throws AxisFault {
if (!filledTable) {
readallChildElements();
}
OMElement val = (OMElement)elementMap.get(id);
if (val == null) {
throw new AxisFault("Invalid reference :" + id);
} else {
if (SimpleTypeMapper.isSimpleType(javatype)) {
/**
* in this case OM element can not contains more child, that is no way to get
* the value as an exp ,
*
* foo
*
* the above one is not valid , that should always be like below
* foo
*/
Object valObj = SimpleTypeMapper.getSimpleTypeObject(javatype, val);
objectmap.put(id, valObj);
return valObj;
} else if (SimpleTypeMapper.isCollection(javatype)) {
Object valobj = SimpleTypeMapper.getArrayList(val);
objectmap.put(id, valobj);
return valobj;
} else {
Object obj = BeanUtil.deserialize(javatype, val, this, objectSupplier);
objectmap.put(id, obj);
return obj;
}
}
}
private void readallChildElements() {
Iterator childs = parent.getChildElements();
while (childs.hasNext()) {
OMElement omElement = (OMElement)childs.next();
OMAttribute id = omElement.getAttribute(new QName("id"));
if (id != null) {
omElement.build();
elementMap.put(id.getAttributeValue(), omElement.detach());
}
}
filledTable = true;
}
public static String getAttvalue(OMAttribute omatribute) {
String ref;
ref = omatribute.getAttributeValue();
if (ref != null) {
if (ref.charAt(0) == '#') {
ref = ref.substring(1);
}
}
return ref;
}
public static OMAttribute processRefAtt(OMElement omElement) {
OMAttribute omatribute = omElement.getAttribute(new QName(SOAP11_REF_ATTR));
if (omatribute == null) {
omatribute = omElement.getAttribute(new QName(SOAP12_REF_ATTR));
}
return omatribute;
}
public void clean() {
elementMap.clear();
objectmap.clear();
}
/**
* this method is used to process the href attributes which may comes with the incomming soap mesaage
*
*
*
*
* the real argument
* blue
*
*
* here we assume first child of the soap body has the main object structure and others contain the
* multiref parts.
* Soap spec says that those multiref parts must be top level elements.
*
* @param soapEnvelope
*/
public static void processHrefAttributes(SOAPEnvelope soapEnvelope)
throws AxisFault {
// first populate the multiref parts to a hash table.
SOAPBody soapBody = soapEnvelope.getBody();
// first build the whole tree
soapBody.build();
OMElement omElement = null;
OMAttribute idAttribute = null;
Map idAndOMElementMap = new HashMap();
for (Iterator iter = soapBody.getChildElements(); iter.hasNext();) {
omElement = (OMElement) iter.next();
// the attribute id is an unqualified attribute
idAttribute = omElement.getAttribute(new QName(null, "id"));
if (idAttribute != null) {
// for the first element there may not have an id
idAndOMElementMap.put(idAttribute.getAttributeValue(), omElement);
}
}
// start processing from the first child
processHrefAttributes(idAndOMElementMap, soapBody.getFirstElement(), OMAbstractFactory.getOMFactory());
}
public static void processHrefAttributes(Map idAndOMElementMap,
OMElement elementToProcess,
OMFactory omFactory)
throws AxisFault {
// first check whether this element has an href value.
// href is also an unqualifed attribute
OMAttribute hrefAttribute = elementToProcess.getAttribute(new QName(null, "href"));
if (hrefAttribute != null) {
// i.e this has an href attribute
String hrefAttributeValue = hrefAttribute.getAttributeValue();
if (!hrefAttributeValue.startsWith("#")) {
throw new AxisFault("In valid href ==> " + hrefAttributeValue + " does not starts with #");
} else {
OMElement referedOMElement =
(OMElement) idAndOMElementMap.get(hrefAttributeValue.substring(1));
if (referedOMElement == null) {
throw new AxisFault("In valid href ==> " + hrefAttributeValue + " can not find" +
"the matching element");
} else {
// now we have to remove the hrefAttribute and add all the child elements to the
// element being proccesed
elementToProcess.removeAttribute(hrefAttribute);
OMElement clonedReferenceElement = getClonedOMElement(referedOMElement, omFactory);
OMNode omNode = null;
for (Iterator iter = clonedReferenceElement.getChildren(); iter.hasNext();) {
omNode = (OMNode) iter.next();
iter.remove();
elementToProcess.addChild(omNode);
}
// add attributes
OMAttribute omAttribute = null;
for (Iterator iter = clonedReferenceElement.getAllAttributes(); iter.hasNext();) {
omAttribute = (OMAttribute) iter.next();
// we do not have to populate the id attribute
if (!omAttribute.getLocalName().equals("id")) {
elementToProcess.addAttribute(omAttribute);
}
}
}
}
}
// call recursively to proces all elements
OMElement childOMElement = null;
for (Iterator iter = elementToProcess.getChildElements(); iter.hasNext();) {
childOMElement = (OMElement) iter.next();
processHrefAttributes(idAndOMElementMap, childOMElement, omFactory);
}
}
/**
* returns an cloned om element for this OMElement
*
* @param omElement
* @return cloned omElement
*/
public static OMElement getClonedOMElement(OMElement omElement, OMFactory omFactory) throws AxisFault {
OMElement newOMElement = omFactory.createOMElement(omElement.getQName());
// copying attributes
OMAttribute omAttribute = null;
OMAttribute newOMAttribute = null;
for (Iterator iter = omElement.getAllAttributes(); iter.hasNext();) {
omAttribute = (OMAttribute) iter.next();
if (!omAttribute.getAttributeValue().equals("id")) {
newOMAttribute = omFactory.createOMAttribute(
omAttribute.getLocalName(),
omAttribute.getNamespace(),
omAttribute.getAttributeValue());
newOMElement.addAttribute(newOMAttribute);
}
}
OMNode omNode = null;
OMText omText = null;
for (Iterator iter = omElement.getChildren(); iter.hasNext();) {
omNode = (OMNode) iter.next();
if (omNode instanceof OMText) {
omText = (OMText) omNode;
newOMElement.addChild(omFactory.createOMText(omText.getText()));
} else if (omNode instanceof OMElement) {
newOMElement.addChild(getClonedOMElement((OMElement) omNode, omFactory));
} else {
throw new AxisFault("Unknown child element type ==> " + omNode.getClass().getName());
}
}
return newOMElement;
}
}