X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=xmltooling%2FAbstractDOMCachingXMLObject.cpp;h=496615604d4245a00ae01531b95699e30da6edf9;hb=e7a65d784215bc04355f014141219b3e7ab4559a;hp=750e3f91f06ee104a526fc5efd35373a346a57ed;hpb=cc0bfa6146fb0a556e80ae5f83c330dbe2ddf3c9;p=shibboleth%2Fcpp-xmltooling.git

diff --git a/xmltooling/AbstractDOMCachingXMLObject.cpp b/xmltooling/AbstractDOMCachingXMLObject.cpp
index 750e3f9..4966156 100644
--- a/xmltooling/AbstractDOMCachingXMLObject.cpp
+++ b/xmltooling/AbstractDOMCachingXMLObject.cpp
@@ -1,122 +1,153 @@
-/*
- *  Copyright 2001-2006 Internet2
- * 
- * 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.
- */
-
-/**
- * AbstractDOMCachingXMLObject.cpp
- * 
- * Extension of AbstractXMLObject that implements a DOMCachingXMLObject. 
- */
-
-#include "internal.h"
-#include "exceptions.h"
-#include "AbstractDOMCachingXMLObject.h"
-
-#include <algorithm>
-#include <functional>
-#include <log4cpp/Category.hh>
-
-using namespace xmltooling;
-using namespace log4cpp;
-using namespace std;
-
-AbstractDOMCachingXMLObject::~AbstractDOMCachingXMLObject()
-{
-    if (m_document)
-        m_document->release();
-}
-
-void AbstractDOMCachingXMLObject::setDOM(DOMElement* dom, bool bindDocument)
-{
-    m_dom=dom;
-    if (dom) {
-        if (bindDocument) {
-            setDocument(dom->getOwnerDocument());
-        }
-    }
-}
-
-void AbstractDOMCachingXMLObject::releaseDOM()
-{
-    Category& log=Category::getInstance(XMLTOOLING_LOGCAT".DOM");
-    if (log.isDebugEnabled()) {
-        string qname=getElementQName().toString();
-        log.debug("releasing cached DOM representation for (%s)", qname.empty() ? "unknown" : qname.c_str());
-    }
-    setDOM(NULL);
-}
-
-void AbstractDOMCachingXMLObject::releaseParentDOM(bool propagateRelease)
-{
-    DOMCachingXMLObject* domCachingParent = dynamic_cast<DOMCachingXMLObject*>(getParent());
-    if (domCachingParent) {
-        Category::getInstance(XMLTOOLING_LOGCAT".DOM").debug(
-            "releasing cached DOM representation for parent object with propagation set to %s",
-            propagateRelease ? "true" : "false"
-            );
-        domCachingParent->releaseDOM();
-        if (propagateRelease)
-            domCachingParent->releaseParentDOM(propagateRelease);
-    }
-}
-
-class _release : public binary_function<XMLObject*,bool,void> {
-public:
-    void operator()(XMLObject* obj, bool propagate) const {
-        DOMCachingXMLObject* domCaching = dynamic_cast<DOMCachingXMLObject*>(obj);
-        if (domCaching) {
-            domCaching->releaseDOM();
-            if (propagate)
-                domCaching->releaseChildrenDOM(propagate);
-        }
-    }
-};
-
-void AbstractDOMCachingXMLObject::releaseChildrenDOM(bool propagateRelease)
-{
-    vector<XMLObject*> children;
-    if (getOrderedChildren(children)) {
-        Category::getInstance(XMLTOOLING_LOGCAT".DOM").debug(
-            "releasing cached DOM representation for children with propagation set to %s",
-            propagateRelease ? "true" : "false"
-            );
-        for_each(children.begin(),children.end(),bind2nd(_release(),propagateRelease));
-    }
-}
-
-XMLObject* AbstractDOMCachingXMLObject::prepareForAssignment(const XMLObject* oldValue, XMLObject* newValue) {
-
-    if (newValue && newValue->hasParent())
-        throw XMLObjectException("Child XMLObject cannot be added - it is already the child of another XMLObject");
-
-    if (!oldValue) {
-        if (newValue) {
-            releaseThisandParentDOM();
-            newValue->setParent(this);
-            return newValue;
-        }
-        else {
-            return NULL;
-        }
-    }
-
-    if (oldValue != newValue) {
-        delete oldValue;
-        releaseThisandParentDOM();
-        newValue->setParent(this);
-    }
-
-    return newValue;
-}
+/*
+ *  Copyright 2001-2006 Internet2
+ * 
+ * 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.
+ */
+
+/**
+ * AbstractDOMCachingXMLObject.cpp
+ * 
+ * Extension of AbstractXMLObject that implements a DOMCachingXMLObject. 
+ */
+
+#include "internal.h"
+#include "AbstractDOMCachingXMLObject.h"
+#include "exceptions.h"
+#include "XMLObjectBuilder.h"
+#include "util/XMLHelper.h"
+
+#include <algorithm>
+#include <functional>
+#include <log4cpp/Category.hh>
+
+using namespace xmltooling;
+using namespace log4cpp;
+using namespace std;
+
+AbstractDOMCachingXMLObject::~AbstractDOMCachingXMLObject()
+{
+    if (m_document)
+        m_document->release();
+}
+
+void AbstractDOMCachingXMLObject::setDOM(DOMElement* dom, bool bindDocument) const
+{
+    m_dom=dom;
+    if (dom) {
+        if (bindDocument) {
+            setDocument(dom->getOwnerDocument());
+        }
+    }
+}
+
+void AbstractDOMCachingXMLObject::releaseDOM() const
+{
+    if (m_dom) {
+        Category& log=Category::getInstance(XMLTOOLING_LOGCAT".DOM");
+        if (log.isDebugEnabled()) {
+            string qname=getElementQName().toString();
+            log.debug("releasing cached DOM representation for (%s)", qname.empty() ? "unknown" : qname.c_str());
+        }
+        setDOM(NULL);
+    }
+}
+
+void AbstractDOMCachingXMLObject::releaseParentDOM(bool propagateRelease) const
+{
+    if (getParent() && getParent()->getDOM()) {
+        Category::getInstance(XMLTOOLING_LOGCAT".DOM").debug(
+            "releasing cached DOM representation for parent object with propagation set to %s",
+            propagateRelease ? "true" : "false"
+            );
+        getParent()->releaseDOM();
+        if (propagateRelease)
+            getParent()->releaseParentDOM(propagateRelease);
+    }
+}
+
+class _release : public binary_function<XMLObject*,bool,void> {
+public:
+    void operator()(XMLObject* obj, bool propagate) const {
+        if (obj) {
+            obj->releaseDOM();
+            if (propagate)
+                obj->releaseChildrenDOM(propagate);
+        }
+    }
+};
+
+void AbstractDOMCachingXMLObject::releaseChildrenDOM(bool propagateRelease) const
+{
+    if (hasChildren()) {
+        Category::getInstance(XMLTOOLING_LOGCAT".DOM").debug(
+            "releasing cached DOM representation for children with propagation set to %s",
+            propagateRelease ? "true" : "false"
+            );
+        const list<XMLObject*>& children=getOrderedChildren();
+        for_each(children.begin(),children.end(),bind2nd(_release(),propagateRelease));
+    }
+}
+
+DOMElement* AbstractDOMCachingXMLObject::cloneDOM(DOMDocument* doc) const
+{
+    if (getDOM()) {
+        if (!doc)
+            doc=DOMImplementationRegistry::getDOMImplementation(NULL)->createDocument();
+        return static_cast<DOMElement*>(doc->importNode(getDOM(),true));
+    }
+    return NULL;
+}
+
+XMLObject* AbstractDOMCachingXMLObject::clone() const
+{
+    // See if we can clone via the DOM.
+    DOMElement* domCopy=cloneDOM();
+    if (domCopy) {
+        // Seemed to work, so now we unmarshall the DOM to produce the clone.
+        const XMLObjectBuilder* b=XMLObjectBuilder::getBuilder(domCopy);
+        if (!b) {
+            auto_ptr<QName> q(XMLHelper::getNodeQName(domCopy));
+            Category::getInstance(XMLTOOLING_LOGCAT".DOM").error(
+                "DOM clone failed, unable to locate builder for element (%s)", q->toString().c_str()
+                );
+            domCopy->getOwnerDocument()->release();
+            throw UnmarshallingException("Unable to locate builder for cloned element.");
+        }
+        XercesJanitor<DOMDocument> janitor(domCopy->getOwnerDocument());
+        XMLObject* ret = b->buildFromElement(domCopy,true); // bind document
+        janitor.release(); // safely transferred
+        return ret;
+    }
+    return NULL;
+}
+
+void AbstractDOMCachingXMLObject::detach()
+{
+    // This is an override that duplicates some of the checking in the base class but
+    // adds document management in preparation for deletion of the parent.
+
+    if (!getParent())
+        return;
+
+    if (getParent()->hasParent())
+        throw XMLObjectException("Cannot detach an object whose parent is itself a child.");
+
+    AbstractDOMCachingXMLObject* parent = dynamic_cast<AbstractDOMCachingXMLObject*>(getParent());
+    if (parent && parent->m_document) {
+        // Transfer control of document to me...
+        setDocument(parent->m_document);
+        parent->m_document = NULL;
+    }
+    // The rest is done by the base.
+    AbstractXMLObject::detach();
+}