2 * Copyright 2001-2007 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.
20 * Abstract interface to objects that can be manipulated in and out of XML form.
23 #ifndef __xmltooling_xmlobj_h__
24 #define __xmltooling_xmlobj_h__
26 #include <xmltooling/QName.h>
27 #include <xmltooling/Namespace.h>
32 #include <xercesc/dom/DOM.hpp>
34 using namespace xercesc;
36 #ifndef XMLTOOLING_NO_XMLSEC
37 namespace xmlsignature {
38 class XMLTOOL_API Signature;
42 #if defined (_MSC_VER)
43 #pragma warning( push )
44 #pragma warning( disable : 4250 4251 )
47 namespace xmltooling {
49 #ifndef XMLTOOLING_NO_XMLSEC
50 class XMLTOOL_API Credential;
54 * Object that represents an XML Element that has been unmarshalled into this C++ object.
56 class XMLTOOL_API XMLObject
59 virtual ~XMLObject() {}
62 * Creates a copy of the object, along with all of its children.
64 * The new object tree will be completely distinct and independent of
65 * the original in all respects.
67 virtual XMLObject* clone() const=0;
70 * Specialized function for detaching a child object from its parent
71 * <strong>while disposing of the parent</strong>.
73 * This is not a generic way of detaching any child object, but only of
74 * pruning a single child from the root of an XMLObject tree. If the
75 * detached XMLObject's parent is itself a child, an exception will be
76 * thrown. It's mainly useful for turning a child into the new root of
77 * the tree without having to clone the child.
79 virtual void detach()=0;
82 * Gets the QName for this element. This QName <strong>MUST</strong>
83 * contain the namespace URI, namespace prefix, and local element name.
85 * @return constant reference to the QName for this object
87 virtual const QName& getElementQName() const=0;
90 * Gets the namespaces that are scoped to this element.
92 * The caller MUST NOT modify the set returned, but may use any
93 * non-modifying operations or algorithms on it. Iterators will
94 * remain valid unless the set member referenced is removed using
95 * the removeNamespace method.
97 * @return the namespaces that are scoped to this element
99 virtual const std::set<Namespace>& getNamespaces() const=0;
102 * Adds a namespace to the ones already scoped to this element
104 * @param ns the namespace to add
106 virtual void addNamespace(const Namespace& ns) const=0;
109 * Removes a namespace from this element
111 * @param ns the namespace to remove
113 virtual void removeNamespace(const Namespace& ns)=0;
116 * Gets the XML schema type of this element. This translates to contents the xsi:type
117 * attribute for the element.
119 * @return XML schema type of this element
121 virtual const QName* getSchemaType() const=0;
124 * Gets the value of the ID attribute set on this object, if any.
126 * @return an ID value or NULL
128 virtual const XMLCh* getXMLID() const=0;
131 * Checks to see if this object has a parent.
133 * @return true if the object has a parent, false if not
135 virtual bool hasParent() const=0;
138 * Gets the parent of this element or null if there is no parent.
140 * @return the parent of this element or null
142 virtual XMLObject* getParent() const=0;
145 * Sets the parent of this element.
147 * @param parent the parent of this element
149 virtual void setParent(XMLObject* parent)=0;
152 * Checks if this XMLObject has children.
154 * @return true if this XMLObject has children, false if not
156 virtual bool hasChildren() const=0;
159 * Returns an unmodifiable list of child objects in the order that they
160 * should appear in the serialized representation.
162 * The validity of the returned list is not maintained if any non-const
163 * operations are performed on the parent object.
165 * @return the list of children
167 virtual const std::list<XMLObject*>& getOrderedChildren() const=0;
170 * Used by a child's detach method to isolate the child from
171 * this parent object in preparation for destroying the parent
174 * @param child the child object to remove
176 virtual void removeChild(XMLObject* child)=0;
179 * Returns the text content at the specified position relative to
180 * any child elements. A zero represents leading text, 1 comes after
181 * the first child, and so forth.
183 * @param position the relative child element position of the text
184 * @return the designated text value
186 virtual const XMLCh* getTextContent(unsigned int position=0) const=0;
189 * Sets (or clears) text content relative to a child element's position.
191 * @param value value to set, or NULL to clear
192 * @param position position relative to child element
194 virtual void setTextContent(const XMLCh* value, unsigned int position=0)=0;
197 * Gets the DOM representation of this XMLObject, if one exists.
199 * @return the DOM representation of this XMLObject
201 virtual DOMElement* getDOM() const=0;
204 * Sets the DOM representation of this XMLObject.
206 * @param dom DOM representation of this XMLObject
207 * @param bindDocument true if the object should take ownership of the associated Document
209 virtual void setDOM(DOMElement* dom, bool bindDocument=false) const=0;
212 * Assigns ownership of a DOM document to the XMLObject.
213 * This binds the lifetime of the document to the lifetime of the object.
215 * @param doc DOM document bound to this object
217 virtual void setDocument(DOMDocument* doc) const=0;
220 * Releases the DOM representation of this XMLObject, if there is one.
222 virtual void releaseDOM() const=0;
225 * Releases the DOM representation of this XMLObject's parent.
227 * @param propagateRelease true if all ancestors of this element should release their DOM
229 virtual void releaseParentDOM(bool propagateRelease=true) const=0;
232 * Releases the DOM representation of this XMLObject's children.
234 * @param propagateRelease true if all descendants of this element should release their DOM
236 virtual void releaseChildrenDOM(bool propagateRelease=true) const=0;
239 * A convenience method that is equal to calling releaseDOM() then releaseParentDOM(true).
241 void releaseThisandParentDOM() const {
244 releaseParentDOM(true);
249 * A convenience method that is equal to calling releaseChildrenDOM(true) then releaseDOM().
251 void releaseThisAndChildrenDOM() const {
253 releaseChildrenDOM(true);
259 * Marshalls the XMLObject, and its children, into a DOM element.
260 * If a document is supplied, then it will be used to create the resulting elements.
261 * If the document does not have a Document Element set, then the resulting
262 * element will be set as the Document Element. If no document is supplied, then
263 * a new document will be created and bound to the lifetime of the root object being
264 * marshalled, unless an existing DOM can be reused without creating a new document.
266 * @param document the DOM document the marshalled element will be placed in, or NULL
267 * @param sigs ordered array of signatures to create after marshalling is complete
268 * @param credential optional credential to supply signing key and related info
269 * @return the DOM element representing this XMLObject
271 * @throws MarshallingException thrown if there is a problem marshalling the given object
272 * @throws SignatureException thrown if a problem occurs during signature creation
274 virtual DOMElement* marshall(
275 DOMDocument* document=NULL
276 #ifndef XMLTOOLING_NO_XMLSEC
277 ,const std::vector<xmlsignature::Signature*>* sigs=NULL
278 ,const Credential* credential=NULL
283 * Marshalls the XMLObject and appends it as a child of the given parent element.
285 * <strong>NOTE:</strong> The given Element must be within a DOM tree rooted in
286 * the Document owning the given Element.
288 * @param parentElement the parent element to append the resulting DOM tree
289 * @param sigs ordered array of signatures to create after marshalling is complete
290 * @param credential optional credential to supply signing key and related info
291 * @return the marshalled element tree
293 * @throws MarshallingException thrown if the given XMLObject can not be marshalled.
294 * @throws SignatureException thrown if a problem occurs during signature creation
296 virtual DOMElement* marshall(
297 DOMElement* parentElement
298 #ifndef XMLTOOLING_NO_XMLSEC
299 ,const std::vector<xmlsignature::Signature*>* sigs=NULL
300 ,const Credential* credential=NULL
305 * Unmarshalls the given W3C DOM element into the XMLObject.
306 * The root of a given XML construct should be unmarshalled with the bindDocument parameter
309 * @param element the DOM element to unmarshall
310 * @param bindDocument true iff the resulting XMLObject should take ownership of the DOM's Document
312 * @return the unmarshalled XMLObject
314 * @throws UnmarshallingException thrown if an error occurs unmarshalling the DOM element into the XMLObject
316 virtual XMLObject* unmarshall(DOMElement* element, bool bindDocument=false)=0;
321 XMLObject& operator=(const XMLObject& src);
326 #if defined (_MSC_VER)
327 #pragma warning( pop )
330 #endif /* __xmltooling_xmlobj_h__ */