| #ifndef DOMElement_HEADER_GUARD_ |
| #define DOMElement_HEADER_GUARD_ |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| /* |
| * $Id: DOMElement.hpp 568078 2007-08-21 11:43:25Z amassari $ |
| */ |
| |
| #include <xercesc/util/XercesDefs.hpp> |
| #include <xercesc/dom/DOMNode.hpp> |
| |
| XERCES_CPP_NAMESPACE_BEGIN |
| |
| |
| class DOMAttr; |
| class DOMNodeList; |
| class DOMTypeInfo; |
| |
| |
| /** |
| * By far the vast majority of objects (apart from text) that authors |
| * encounter when traversing a document are <code>DOMElement</code> nodes. |
| * |
| * Assume the following XML document:<elementExample id="demo"> |
| * <subelement1/> |
| * <subelement2><subsubelement/></subelement2> |
| * </elementExample> |
| * <p>When represented using DOM, the top node is an <code>DOMElement</code> node |
| * for "elementExample", which contains two child <code>DOMElement</code> nodes, |
| * one for "subelement1" and one for "subelement2". "subelement1" contains no |
| * child nodes. |
| * <p>Elements may have attributes associated with them; since the |
| * <code>DOMElement</code> interface inherits from <code>DOMNode</code>, the generic |
| * <code>DOMNode</code> interface method <code>getAttributes</code> may be used |
| * to retrieve the set of all attributes for an element. There are methods on |
| * the <code>DOMElement</code> interface to retrieve either an <code>DOMAttr</code> |
| * object by name or an attribute value by name. In XML, where an attribute |
| * value may contain entity references, an <code>DOMAttr</code> object should be |
| * retrieved to examine the possibly fairly complex sub-tree representing the |
| * attribute value. On the other hand, in HTML, where all attributes have |
| * simple string values, methods to directly access an attribute value can |
| * safely be used as a convenience. |
| * |
| * @since DOM Level 1 |
| */ |
| |
| class CDOM_EXPORT DOMElement: public DOMNode { |
| protected: |
| // ----------------------------------------------------------------------- |
| // Hidden constructors |
| // ----------------------------------------------------------------------- |
| /** @name Hidden constructors */ |
| //@{ |
| DOMElement() {} |
| DOMElement(const DOMElement &other) : DOMNode(other) {} |
| //@} |
| |
| private: |
| // ----------------------------------------------------------------------- |
| // Unimplemented constructors and operators |
| // ----------------------------------------------------------------------- |
| /** @name Unimplemented operators */ |
| //@{ |
| DOMElement & operator = (const DOMElement &); |
| //@} |
| |
| public: |
| // ----------------------------------------------------------------------- |
| // All constructors are hidden, just the destructor is available |
| // ----------------------------------------------------------------------- |
| /** @name Destructor */ |
| //@{ |
| /** |
| * Destructor |
| * |
| */ |
| virtual ~DOMElement() {}; |
| //@} |
| |
| // ----------------------------------------------------------------------- |
| // Virtual DOMElement interface |
| // ----------------------------------------------------------------------- |
| /** @name Functions introduced in DOM Level 1 */ |
| //@{ |
| // ----------------------------------------------------------------------- |
| // Getter methods |
| // ----------------------------------------------------------------------- |
| /** |
| * The name of the element. |
| * |
| * For example, in: <elementExample |
| * id="demo"> ... </elementExample> , <code>tagName</code> has |
| * the value <code>"elementExample"</code>. Note that this is |
| * case-preserving in XML, as are all of the operations of the DOM. |
| * @since DOM Level 1 |
| */ |
| virtual const XMLCh * getTagName() const = 0; |
| |
| /** |
| * Retrieves an attribute value by name. |
| * |
| * @param name The name of the attribute to retrieve. |
| * @return The <code>DOMAttr</code> value as a string, or the empty string if |
| * that attribute does not have a specified or default value. |
| * @since DOM Level 1 |
| */ |
| virtual const XMLCh * getAttribute(const XMLCh *name) const = 0; |
| |
| /** |
| * Retrieves an <code>DOMAttr</code> node by name. |
| * |
| * @param name The name (<CODE>nodeName</CODE>) of the attribute to retrieve. |
| * @return The <code>DOMAttr</code> node with the specified name (<CODE>nodeName</CODE>) or |
| * <code>null</code> if there is no such attribute. |
| * @since DOM Level 1 |
| */ |
| virtual DOMAttr * getAttributeNode(const XMLCh *name) const = 0; |
| |
| /** |
| * Returns a <code>DOMNodeList</code> of all descendant elements with a given |
| * tag name, in the order in which they would be encountered in a preorder |
| * traversal of the <code>DOMElement</code> tree. |
| * |
| * @param name The name of the tag to match on. The special value "*" |
| * matches all tags. |
| * @return A list of matching <code>DOMElement</code> nodes. |
| * @since DOM Level 1 |
| */ |
| virtual DOMNodeList * getElementsByTagName(const XMLCh *name) const = 0; |
| |
| // ----------------------------------------------------------------------- |
| // Setter methods |
| // ----------------------------------------------------------------------- |
| /** |
| * Adds a new attribute. |
| * |
| * If an attribute with that name is already present |
| * in the element, its value is changed to be that of the value parameter. |
| * This value is a simple string, it is not parsed as it is being set. So |
| * any markup (such as syntax to be recognized as an entity reference) is |
| * treated as literal text, and needs to be appropriately escaped by the |
| * implementation when it is written out. In order to assign an attribute |
| * value that contains entity references, the user must create an |
| * <code>DOMAttr</code> node plus any <code>DOMText</code> and |
| * <code>DOMEntityReference</code> nodes, build the appropriate subtree, and |
| * use <code>setAttributeNode</code> to assign it as the value of an |
| * attribute. |
| * @param name The name of the attribute to create or alter. |
| * @param value Value to set in string form. |
| * @exception DOMException |
| * INVALID_CHARACTER_ERR: Raised if the specified name contains an |
| * illegal character. |
| * <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * @since DOM Level 1 |
| */ |
| virtual void setAttribute(const XMLCh *name, |
| const XMLCh *value) = 0; |
| /** |
| * Adds a new attribute. |
| * |
| * If an attribute with that name (<CODE>nodeName</CODE>) is already present |
| * in the element, it is replaced by the new one. |
| * @param newAttr The <code>DOMAttr</code> node to add to the attribute list. |
| * @return If the <code>newAttr</code> attribute replaces an existing |
| * attribute, the replaced |
| * <code>DOMAttr</code> node is returned, otherwise <code>null</code> is |
| * returned. |
| * @exception DOMException |
| * WRONG_DOCUMENT_ERR: Raised if <code>newAttr</code> was created from a |
| * different document than the one that created the element. |
| * <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * <br>INUSE_ATTRIBUTE_ERR: Raised if <code>newAttr</code> is already an |
| * attribute of another <code>DOMElement</code> object. The DOM user must |
| * explicitly clone <code>DOMAttr</code> nodes to re-use them in other |
| * elements. |
| * @since DOM Level 1 |
| */ |
| virtual DOMAttr * setAttributeNode(DOMAttr *newAttr) = 0; |
| |
| /** |
| * Removes the specified attribute node. |
| * If the removed <CODE>DOMAttr</CODE> |
| * has a default value it is immediately replaced. The replacing attribute |
| * has the same namespace URI and local name, as well as the original prefix, |
| * when applicable. |
| * |
| * @param oldAttr The <code>DOMAttr</code> node to remove from the attribute |
| * list. |
| * @return The <code>DOMAttr</code> node that was removed. |
| * @exception DOMException |
| * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * <br>NOT_FOUND_ERR: Raised if <code>oldAttr</code> is not an attribute |
| * of the element. |
| * @since DOM Level 1 |
| */ |
| virtual DOMAttr * removeAttributeNode(DOMAttr *oldAttr) = 0; |
| |
| /** |
| * Removes an attribute by name. |
| * |
| * If the removed attribute |
| * is known to have a default value, an attribute immediately appears |
| * containing the default value as well as the corresponding namespace URI, |
| * local name, and prefix when applicable.<BR>To remove an attribute by local |
| * name and namespace URI, use the <CODE>removeAttributeNS</CODE> method. |
| * @param name The name of the attribute to remove. |
| * @exception DOMException |
| * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * @since DOM Level 1 |
| */ |
| virtual void removeAttribute(const XMLCh *name) = 0; |
| //@} |
| |
| /** @name Functions introduced in DOM Level 2. */ |
| //@{ |
| /** |
| * Retrieves an attribute value by local name and namespace URI. |
| * |
| * @param namespaceURI The <em>namespace URI</em> of |
| * the attribute to retrieve. |
| * @param localName The <em>local name</em> of the |
| * attribute to retrieve. |
| * @return The <code>DOMAttr</code> value as a string, or an <CODE>null</CODE> if |
| * that attribute does not have a specified or default value. |
| * @since DOM Level 2 |
| */ |
| virtual const XMLCh * getAttributeNS(const XMLCh *namespaceURI, |
| const XMLCh *localName) const = 0; |
| |
| /** |
| * Adds a new attribute. If an attribute with the same |
| * local name and namespace URI is already present on the element, its prefix |
| * is changed to be the prefix part of the <CODE>qualifiedName</CODE>, and |
| * its value is changed to be the <CODE>value</CODE> parameter. This value is |
| * a simple string, it is not parsed as it is being set. So any markup (such |
| * as syntax to be recognized as an entity reference) is treated as literal |
| * text, and needs to be appropriately escaped by the implementation when it |
| * is written out. In order to assign an attribute value that contains entity |
| * references, the user must create an <CODE>DOMAttr</CODE> |
| * node plus any <CODE>DOMText</CODE> and <CODE>DOMEntityReference</CODE> |
| * nodes, build the appropriate subtree, and use |
| * <CODE>setAttributeNodeNS</CODE> or <CODE>setAttributeNode</CODE> to assign |
| * it as the value of an attribute. |
| * |
| * @param namespaceURI The <em>namespace URI</em> of |
| * the attribute to create or alter. |
| * @param qualifiedName The <em>qualified name</em> of the |
| * attribute to create or alter. |
| * @param value The value to set in string form. |
| * @exception DOMException |
| * INVALID_CHARACTER_ERR: Raised if the specified qualified name contains an |
| * illegal character. |
| * <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * <br> |
| * NAMESPACE_ERR: Raised if the <CODE>qualifiedName</CODE> is |
| * malformed, if the <CODE>qualifiedName</CODE> has a prefix and the |
| * <CODE>namespaceURI</CODE> is <CODE>null</CODE> or an empty string, |
| * if the <CODE>qualifiedName</CODE> has a prefix that is "xml" and the |
| * <CODE>namespaceURI</CODE> is different from |
| * "http://www.w3.org/XML/1998/namespace", if the |
| * <CODE>qualifiedName</CODE> has a prefix that is "xmlns" and the |
| * <CODE>namespaceURI</CODE> is different from |
| * "http://www.w3.org/2000/xmlns/", or if the |
| * <CODE>qualifiedName</CODE> is "xmlns" and the |
| * <CODE>namespaceURI</CODE> is different from |
| * "http://www.w3.org/2000/xmlns/". |
| * @since DOM Level 2 |
| */ |
| virtual void setAttributeNS(const XMLCh *namespaceURI, |
| const XMLCh *qualifiedName, const XMLCh *value) = 0; |
| |
| /** |
| * Removes an attribute by local name and namespace URI. If the |
| * removed attribute has a default value it is immediately replaced. |
| * The replacing attribute has the same namespace URI and local name, as well as |
| * the original prefix. |
| * |
| * @param namespaceURI The <em>namespace URI</em> of |
| * the attribute to remove. |
| * @param localName The <em>local name</em> of the |
| * attribute to remove. |
| * @exception DOMException |
| * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * @since DOM Level 2 |
| */ |
| virtual void removeAttributeNS(const XMLCh *namespaceURI, |
| const XMLCh *localName) = 0; |
| |
| /** |
| * Retrieves an <code>DOMAttr</code> node by local name and namespace URI. |
| * |
| * @param namespaceURI The <em>namespace URI</em> of |
| * the attribute to retrieve. |
| * @param localName The <em>local name</em> of the |
| * attribute to retrieve. |
| * @return The <code>DOMAttr</code> node with the specified attribute local |
| * name and namespace URI or <code>null</code> if there is no such attribute. |
| * @since DOM Level 2 |
| */ |
| virtual DOMAttr * getAttributeNodeNS(const XMLCh *namespaceURI, |
| const XMLCh *localName) const = 0; |
| |
| /** |
| * Adds a new attribute. |
| * |
| * If an attribute with that local name and namespace URI is already present |
| * in the element, it is replaced by the new one. |
| * |
| * @param newAttr The <code>DOMAttr</code> node to add to the attribute list. |
| * @return If the <code>newAttr</code> attribute replaces an existing |
| * attribute with the same <em>local name</em> and <em>namespace URI</em>, |
| * the replaced <code>DOMAttr</code> node is |
| * returned, otherwise <code>null</code> is returned. |
| * @exception DOMException |
| * WRONG_DOCUMENT_ERR: Raised if <code>newAttr</code> was created from a |
| * different document than the one that created the element. |
| * <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * <br>INUSE_ATTRIBUTE_ERR: Raised if <code>newAttr</code> is already an |
| * attribute of another <code>DOMElement</code> object. The DOM user must |
| * explicitly clone <code>DOMAttr</code> nodes to re-use them in other |
| * elements. |
| * @since DOM Level 2 |
| */ |
| virtual DOMAttr * setAttributeNodeNS(DOMAttr *newAttr) = 0; |
| |
| /** |
| * Returns a <code>DOMNodeList</code> of all the <code>DOMElement</code>s |
| * with a given local name and namespace URI in the order in which they |
| * would be encountered in a preorder traversal of the |
| * <code>DOMDocument</code> tree, starting from this node. |
| * |
| * @param namespaceURI The <em>namespace URI</em> of |
| * the elements to match on. The special value "*" matches all |
| * namespaces. |
| * @param localName The <em>local name</em> of the |
| * elements to match on. The special value "*" matches all local names. |
| * @return A new <code>DOMNodeList</code> object containing all the matched |
| * <code>DOMElement</code>s. |
| * @since DOM Level 2 |
| */ |
| virtual DOMNodeList * getElementsByTagNameNS(const XMLCh *namespaceURI, |
| const XMLCh *localName) const = 0; |
| |
| /** |
| * Returns <code>true</code> when an attribute with a given name is |
| * specified on this element or has a default value, <code>false</code> |
| * otherwise. |
| * @param name The name of the attribute to look for. |
| * @return <code>true</code> if an attribute with the given name is |
| * specified on this element or has a default value, <code>false</code> |
| * otherwise. |
| * @since DOM Level 2 |
| */ |
| virtual bool hasAttribute(const XMLCh *name) const = 0; |
| |
| /** |
| * Returns <code>true</code> when an attribute with a given local name and |
| * namespace URI is specified on this element or has a default value, |
| * <code>false</code> otherwise. HTML-only DOM implementations do not |
| * need to implement this method. |
| * @param namespaceURI The namespace URI of the attribute to look for. |
| * @param localName The local name of the attribute to look for. |
| * @return <code>true</code> if an attribute with the given local name |
| * and namespace URI is specified or has a default value on this |
| * element, <code>false</code> otherwise. |
| * @since DOM Level 2 |
| */ |
| virtual bool hasAttributeNS(const XMLCh *namespaceURI, |
| const XMLCh *localName) const = 0; |
| //@} |
| |
| /** @name Functions introduced in DOM Level 3 */ |
| //@{ |
| |
| /** |
| * Declares the <code>DOMAttr</code> specified by name to be of type ID. If the |
| * value of the specified <code>DOMAttr</code> is unique then this element node |
| * can later be retrieved using getElementById on Document. Note, however, |
| * that this simply affects this node and does not change any grammar that |
| * may be in use. |
| * To specify an <code>DOMAttr</code> by local name and namespace URI, use the |
| * setIdAttributeNS method. |
| * @param name The name of the <code>DOMAttr</code>. |
| * @exception DOMException |
| * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * <br />NOT_FOUND_ERR: Raised if the specified node is not an <code>DOMAttr</code> |
| * of this element. |
| * |
| * <p><b>"Experimental - subject to change"</b></p> |
| * |
| * @since DOM Level 3 |
| */ |
| virtual void setIdAttribute(const XMLCh* name) = 0; |
| |
| |
| /** |
| * Declares the <code>DOMAttr</code> specified by local name and namespace |
| * URI to be of type ID. If the value of the specified <code>DOMAttr</code> |
| * is unique then this <code>DOMElement</code> node can later be retrieved |
| * using getElementById on <code>DOMDocument</code>. Note, however, that |
| * this simply affects this node and does not change any grammar that may |
| * be in use. |
| * @param namespaceURI The namespace URI of the <code>DOMAttr</code>. |
| * @param localName The local name of the <code>DOMAttr</code>. |
| * @exception DOMException |
| * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * <br />NOT_FOUND_ERR: Raised if the specified node is not an <code>DOMAttr</code> of this element. |
| * |
| * <p><b>"Experimental - subject to change"</b></p> |
| * |
| * @since DOM Level 3 |
| */ |
| virtual void setIdAttributeNS(const XMLCh* namespaceURI, const XMLCh* localName) = 0; |
| |
| |
| |
| /** |
| * Declares the <code>DOMAttr</code> specified by node to be of type ID. |
| * If the value of the specified <code>DOMAttr</code> is unique then this |
| * <code>DOMElement</code> node can later be retrieved using getElementById |
| * on <code>DOMDocument</code>. Note, however, that this simply affects this |
| * node and does not change any grammar that may be in use. |
| * @param idAttr The <code>DOMAttr</code> node. |
| * @exception DOMException |
| * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. |
| * <br />NOT_FOUND_ERR: Raised if the specified node is not an <code>DOMAttr</code> of this element. |
| * |
| * <p><b>"Experimental - subject to change"</b></p> |
| * |
| * @since DOM Level 3 |
| */ |
| virtual void setIdAttributeNode(const DOMAttr *idAttr) = 0; |
| |
| |
| |
| /** |
| * Returns the type information associated with this element. |
| * |
| * <p><b>"Experimental - subject to change"</b></p> |
| * |
| * @return the <code>DOMTypeInfo</code> associated with this element |
| * @since DOM level 3 |
| */ |
| virtual const DOMTypeInfo* getTypeInfo() const = 0; |
| |
| //@} |
| |
| }; |
| |
| XERCES_CPP_NAMESPACE_END |
| |
| #endif |
| |
| |
| |
