2 * Copyright 2001-2006 Internet2
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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8 * http://www.apache.org/licenses/LICENSE-2.0
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10 * Unless required by applicable law or agreed to in writing, software
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 * See the License for the specific language governing permissions and
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14 * limitations under the License.
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18 * AbstractXMLObjectUnmarshaller.cpp
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20 * A thread-safe abstract unmarshaller.
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23 #include "internal.h"
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24 #include "DOMCachingXMLObject.h"
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25 #include "exceptions.h"
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26 #include "XMLObjectBuilder.h"
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27 #include "io/AbstractXMLObjectUnmarshaller.h"
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28 #include "util/NDC.h"
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29 #include "util/XMLConstants.h"
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30 #include "util/XMLHelper.h"
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32 #include <xercesc/util/XMLUniDefs.hpp>
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33 #include <log4cpp/Category.hh>
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35 using namespace xmltooling;
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36 using namespace log4cpp;
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37 using namespace std;
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39 #define XT_log (*static_cast<Category*>(m_log))
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41 AbstractXMLObjectUnmarshaller::AbstractXMLObjectUnmarshaller()
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42 : m_log(&Category::getInstance(XMLTOOLING_LOGCAT".Unmarshaller")) {}
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44 XMLObject* AbstractXMLObjectUnmarshaller::unmarshall(DOMElement* element, bool bindDocument) const
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47 xmltooling::NDC ndc("unmarshall");
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50 if (XT_log.isDebugEnabled()) {
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51 auto_ptr_char dname(element->getLocalName());
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52 XT_log.debug("unmarshalling DOM element %s", dname.get());
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55 auto_ptr<XMLObject> xmlObject(buildXMLObject(element));
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57 if (element->hasAttributes()) {
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58 unmarshallAttributes(element, *(xmlObject.get()));
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61 unmarshallChildElements(element, *(xmlObject.get()));
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64 if (xmlObject instanceof SignableXMLObject) {
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65 verifySignature(domElement, xmlObject);
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69 DOMCachingXMLObject* dc=dynamic_cast<DOMCachingXMLObject*>(xmlObject.get());
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71 dc->setDOM(element,bindDocument);
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72 else if (bindDocument)
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73 throw UnmarshallingException("Unable to bind document to non-DOM caching XMLObject instance.");
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75 return xmlObject.release();
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78 XMLObject* AbstractXMLObjectUnmarshaller::buildXMLObject(const DOMElement* domElement) const
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80 const XMLObjectBuilder* xmlObjectBuilder = XMLObjectBuilder::getBuilder(domElement);
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81 if (xmlObjectBuilder)
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82 return xmlObjectBuilder->buildObject();
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83 throw UnmarshallingException("Failed to locate XMLObjectBuilder for element.");
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86 void AbstractXMLObjectUnmarshaller::unmarshallAttributes(const DOMElement* domElement, XMLObject& xmlObject) const
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89 xmltooling::NDC ndc("unmarshallAttributes");
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91 static const XMLCh type[]={chLatin_t, chLatin_y, chLatin_p, chLatin_e, chNull};
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93 if (XT_log.isDebugEnabled()) {
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94 auto_ptr_char dname(domElement->getLocalName());
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95 XT_log.debug("unmarshalling attributes for DOM element %s", dname.get());
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98 DOMNamedNodeMap* attributes = domElement->getAttributes();
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100 XT_log.debug("no attributes to unmarshall");
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104 DOMNode* childNode;
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105 DOMAttr* attribute;
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106 for (XMLSize_t i=0; i<attributes->getLength(); i++) {
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107 childNode = attributes->item(i);
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109 // The child node should always be an attribute, but just in case
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110 if (childNode->getNodeType() != DOMNode::ATTRIBUTE_NODE) {
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111 XT_log.debug("encountered child node of type %d in attribute list, ignoring it", childNode->getNodeType());
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115 attribute = static_cast<DOMAttr*>(childNode);
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117 const XMLCh* nsuri=attribute->getNamespaceURI();
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118 if (XMLString::equals(nsuri,XMLConstants::XMLNS_NS)) {
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119 if (XMLString::equals(attribute->getLocalName(),XMLConstants::XMLNS_PREFIX)) {
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120 XT_log.debug("found default namespace declaration, adding it to the list of namespaces on the XMLObject");
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121 xmlObject.addNamespace(Namespace(attribute->getValue(), NULL, true));
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125 XT_log.debug("found namespace declaration, adding it to the list of namespaces on the XMLObject");
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126 xmlObject.addNamespace(Namespace(attribute->getValue(), attribute->getLocalName(), true));
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130 else if (XMLString::equals(nsuri,XMLConstants::XSI_NS) && XMLString::equals(attribute->getLocalName(),type)) {
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131 XT_log.debug("found xsi:type declaration, setting the schema type of the XMLObject");
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132 auto_ptr<QName> xsitype(XMLHelper::getAttributeValueAsQName(attribute));
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133 xmlObject.setSchemaType(xsitype.get());
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137 XT_log.debug("found namespace-qualified attribute, adding prefix to the list of namespaces on the XMLObject");
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138 xmlObject.addNamespace(Namespace(nsuri, attribute->getPrefix()));
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141 XT_log.debug("processing generic attribute");
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142 processAttribute(xmlObject, attribute);
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146 void AbstractXMLObjectUnmarshaller::unmarshallChildElements(const DOMElement* domElement, XMLObject& xmlObject) const
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149 xmltooling::NDC ndc("unmarshallChildElements");
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152 if (XT_log.isDebugEnabled()) {
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153 auto_ptr_char dname(domElement->getLocalName());
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154 XT_log.debug("unmarshalling child elements of DOM element %s", dname.get());
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157 DOMNodeList* childNodes = domElement->getChildNodes();
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158 DOMNode* childNode;
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159 const Unmarshaller* unmarshaller;
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160 if (!childNodes || childNodes->getLength()==0) {
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161 XT_log.debug("element had no children");
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165 XMLToolingConfig& config=XMLToolingConfig::getConfig();
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166 for (XMLSize_t i = 0; i < childNodes->getLength(); i++) {
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167 childNode = childNodes->item(i);
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168 if (childNode->getNodeType() == DOMNode::ELEMENT_NODE) {
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169 unmarshaller = Unmarshaller::getUnmarshaller(static_cast<DOMElement*>(childNode));
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170 if (!unmarshaller) {
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171 auto_ptr<QName> cname(XMLHelper::getNodeQName(childNode));
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173 "no default unmarshaller installed, found unknown child element %s", cname->toString().c_str()
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175 throw UnmarshallingException("Unmarshaller found unknown child element, but no default unmarshaller was found.");
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178 if (XT_log.isDebugEnabled()) {
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179 auto_ptr<QName> cname(XMLHelper::getNodeQName(childNode));
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180 XT_log.debug("unmarshalling child element %s", cname->toString().c_str());
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183 // Retain ownership of the unmarshalled child until it's processed by the parent.
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184 auto_ptr<XMLObject> childObject(unmarshaller->unmarshall(static_cast<DOMElement*>(childNode)));
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185 processChildElement(xmlObject, childObject.get());
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186 childObject.release();
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188 else if (childNode->getNodeType() == DOMNode::TEXT_NODE) {
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189 XT_log.debug("processing element content");
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190 processElementContent(xmlObject, childNode->getNodeValue());
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