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4 * Licensed under the Apache License, Version 2.0 (the "License");
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13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * AbstractDOMCachingXMLObject.cpp
20 * Extension of AbstractXMLObject that implements a DOMCachingXMLObject.
24 #include "AbstractDOMCachingXMLObject.h"
25 #include "exceptions.h"
26 #include "XMLObjectBuilder.h"
27 #include "util/XMLHelper.h"
31 #include <log4cpp/Category.hh>
33 using namespace xmltooling;
34 using namespace log4cpp;
37 AbstractDOMCachingXMLObject::~AbstractDOMCachingXMLObject()
40 m_document->release();
43 void AbstractDOMCachingXMLObject::setDOM(DOMElement* dom, bool bindDocument) const
48 setDocument(dom->getOwnerDocument());
53 void AbstractDOMCachingXMLObject::releaseDOM() const
56 Category& log=Category::getInstance(XMLTOOLING_LOGCAT".DOM");
57 if (log.isDebugEnabled()) {
58 string qname=getElementQName().toString();
59 log.debug("releasing cached DOM representation for (%s)", qname.empty() ? "unknown" : qname.c_str());
65 void AbstractDOMCachingXMLObject::releaseParentDOM(bool propagateRelease) const
67 if (getParent() && getParent()->getDOM()) {
68 Category::getInstance(XMLTOOLING_LOGCAT".DOM").debug(
69 "releasing cached DOM representation for parent object with propagation set to %s",
70 propagateRelease ? "true" : "false"
72 getParent()->releaseDOM();
74 getParent()->releaseParentDOM(propagateRelease);
78 class _release : public binary_function<XMLObject*,bool,void> {
80 void operator()(XMLObject* obj, bool propagate) const {
84 obj->releaseChildrenDOM(propagate);
89 void AbstractDOMCachingXMLObject::releaseChildrenDOM(bool propagateRelease) const
92 Category::getInstance(XMLTOOLING_LOGCAT".DOM").debug(
93 "releasing cached DOM representation for children with propagation set to %s",
94 propagateRelease ? "true" : "false"
96 const list<XMLObject*>& children=getOrderedChildren();
97 for_each(children.begin(),children.end(),bind2nd(_release(),propagateRelease));
101 DOMElement* AbstractDOMCachingXMLObject::cloneDOM(DOMDocument* doc) const
105 doc=DOMImplementationRegistry::getDOMImplementation(NULL)->createDocument();
106 return static_cast<DOMElement*>(doc->importNode(getDOM(),true));
111 XMLObject* AbstractDOMCachingXMLObject::clone() const
113 // See if we can clone via the DOM.
114 DOMElement* domCopy=cloneDOM();
116 // Seemed to work, so now we unmarshall the DOM to produce the clone.
117 const XMLObjectBuilder* b=XMLObjectBuilder::getBuilder(domCopy);
119 auto_ptr<QName> q(XMLHelper::getNodeQName(domCopy));
120 Category::getInstance(XMLTOOLING_LOGCAT".DOM").error(
121 "DOM clone failed, unable to locate builder for element (%s)", q->toString().c_str()
123 domCopy->getOwnerDocument()->release();
124 throw UnmarshallingException("Unable to locate builder for cloned element.");
126 XercesJanitor<DOMDocument> janitor(domCopy->getOwnerDocument());
127 XMLObject* ret = b->buildFromElement(domCopy,true); // bind document
128 janitor.release(); // safely transferred
134 void AbstractDOMCachingXMLObject::detach()
136 // This is an override that duplicates some of the checking in the base class but
137 // adds document management in preparation for deletion of the parent.
142 if (getParent()->hasParent())
143 throw XMLObjectException("Cannot detach an object whose parent is itself a child.");
145 AbstractDOMCachingXMLObject* parent = dynamic_cast<AbstractDOMCachingXMLObject*>(getParent());
146 if (parent && parent->m_document) {
147 // Transfer control of document to me...
148 setDocument(parent->m_document);
149 parent->m_document = NULL;
151 // The rest is done by the base.
152 AbstractXMLObject::detach();