2 * Copyright 2001-2006 Internet2
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * AbstractXMLObjectUnmarshaller.cpp
20 * A thread-safe abstract unmarshaller.
24 #include "exceptions.h"
25 #include "XMLObjectBuilder.h"
26 #include "io/AbstractXMLObjectUnmarshaller.h"
28 #include "util/XMLConstants.h"
29 #include "util/XMLHelper.h"
31 #include <xercesc/util/XMLUniDefs.hpp>
33 using namespace xmlconstants;
34 using namespace xmltooling;
38 XMLObject* AbstractXMLObjectUnmarshaller::unmarshall(DOMElement* element, bool bindDocument)
41 xmltooling::NDC ndc("unmarshall");
44 if (getDOM() || hasParent())
45 throw UnmarshallingException("Object already contains data, it cannot be unmarshalled at this stage.");
47 if (!XMLString::equals(element->getNamespaceURI(),getElementQName().getNamespaceURI()) ||
48 !XMLString::equals(element->getLocalName(),getElementQName().getLocalPart())) {
49 throw UnmarshallingException("Unrecognized element supplied to implementation for unmarshalling.");
52 if (m_log.isDebugEnabled()) {
53 auto_ptr_char dname(element->getNodeName());
54 m_log.debug("unmarshalling DOM element (%s)", dname.get());
57 if (element->hasAttributes()) {
58 unmarshallAttributes(element);
61 unmarshallContent(element);
63 setDOM(element,bindDocument);
67 void AbstractXMLObjectUnmarshaller::unmarshallAttributes(const DOMElement* domElement)
70 xmltooling::NDC ndc("unmarshallAttributes");
73 if (m_log.isDebugEnabled()) {
74 auto_ptr_char dname(domElement->getNodeName());
75 m_log.debug("unmarshalling attributes for DOM element (%s)", dname.get());
78 DOMNamedNodeMap* attributes = domElement->getAttributes();
80 m_log.debug("no attributes to unmarshall");
86 for (XMLSize_t i=0; i<attributes->getLength(); i++) {
87 childNode = attributes->item(i);
89 // The child node should always be an attribute, but just in case
90 if (childNode->getNodeType() != DOMNode::ATTRIBUTE_NODE) {
91 m_log.debug("encountered child node of type %d in attribute list, ignoring it", childNode->getNodeType());
95 attribute = static_cast<DOMAttr*>(childNode);
97 const XMLCh* nsuri=attribute->getNamespaceURI();
98 if (XMLString::equals(nsuri,XMLNS_NS)) {
99 if (XMLString::equals(attribute->getLocalName(),XMLNS_PREFIX)) {
100 m_log.debug("found default namespace declaration, adding it to the list of namespaces on the XMLObject");
101 addNamespace(Namespace(attribute->getValue(), NULL, true));
105 m_log.debug("found namespace declaration, adding it to the list of namespaces on the XMLObject");
106 addNamespace(Namespace(attribute->getValue(), attribute->getLocalName(), true));
110 else if (XMLString::equals(nsuri,XSI_NS)) {
111 static const XMLCh type[]= UNICODE_LITERAL_4(t,y,p,e);
112 static const XMLCh schemaLocation[]= UNICODE_LITERAL_14(s,c,h,e,m,a,L,o,c,a,t,i,o,n);
113 if (XMLString::equals(attribute->getLocalName(),type)) {
114 m_log.debug("skipping xsi:type declaration");
117 else if (XMLString::equals(attribute->getLocalName(),schemaLocation)) {
118 m_log.debug("storing off xsi:schemaLocation attribute");
119 if (m_schemaLocation)
120 XMLString::release(&m_schemaLocation);
121 m_schemaLocation=XMLString::replicate(attribute->getValue());
125 else if (nsuri && !XMLString::equals(nsuri,XML_NS)) {
126 m_log.debug("found namespace-qualified attribute, adding prefix to the list of namespaces on the XMLObject");
127 addNamespace(Namespace(nsuri, attribute->getPrefix()));
130 m_log.debug("processing generic attribute");
131 processAttribute(attribute);
135 void AbstractXMLObjectUnmarshaller::unmarshallContent(const DOMElement* domElement)
138 xmltooling::NDC ndc("unmarshallContent");
141 if (m_log.isDebugEnabled()) {
142 auto_ptr_char dname(domElement->getNodeName());
143 m_log.debug("unmarshalling child nodes of DOM element (%s)", dname.get());
146 DOMNode* childNode = domElement->getFirstChild();
148 m_log.debug("element had no children");
152 unsigned int position = 0;
154 if (childNode->getNodeType() == DOMNode::ELEMENT_NODE) {
155 const XMLObjectBuilder* builder = XMLObjectBuilder::getBuilder(static_cast<DOMElement*>(childNode));
157 auto_ptr<QName> cname(XMLHelper::getNodeQName(childNode));
158 m_log.error("no default builder installed, found unknown child element (%s)", cname->toString().c_str());
159 throw UnmarshallingException("Unmarshaller found unknown child element, but no default builder was found.");
162 if (m_log.isDebugEnabled()) {
163 auto_ptr<QName> cname(XMLHelper::getNodeQName(childNode));
164 m_log.debug("unmarshalling child element (%s)", cname->toString().c_str());
167 // Retain ownership of the unmarshalled child until it's processed by the parent.
168 auto_ptr<XMLObject> childObject(builder->buildFromElement(static_cast<DOMElement*>(childNode)));
169 processChildElement(childObject.get(), static_cast<DOMElement*>(childNode));
170 childObject.release();
172 // Advance the text node position marker.
175 else if (childNode->getNodeType() == DOMNode::TEXT_NODE) {
176 m_log.debug("processing text content at position (%d)", position);
177 setTextContent(childNode->getNodeValue(), position);
180 childNode = childNode->getNextSibling();
184 void AbstractXMLObjectUnmarshaller::processChildElement(XMLObject* child, const DOMElement* childRoot)
186 throw UnmarshallingException("Invalid child element: $1",params(1,child->getElementQName().toString().c_str()));
189 void AbstractXMLObjectUnmarshaller::processAttribute(const DOMAttr* attribute)
191 auto_ptr<QName> q(XMLHelper::getNodeQName(attribute));
192 throw UnmarshallingException("Invalid attribute: $1",params(1,q->toString().c_str()));