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/*
 * Copyright (c) 2004 World Wide Web Consortium,
 *
 * (Massachusetts Institute of Technology, European Research Consortium for
 * Informatics and Mathematics, Keio University). All Rights Reserved. This
 * work is distributed under the W3C(r) Software License [1] in the hope that
 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */

package org.w3c.dom;

/**
 * The Element interface represents an element in an HTML or XML 
 * document. Elements may have attributes associated with them; since the 
 * Element interface inherits from Node, the 
 * generic Node interface attribute attributes may 
 * be used to retrieve the set of all attributes for an element. There are 
 * methods on the Element interface to retrieve either an 
 * Attr object by name or an attribute value by name. In XML, 
 * where an attribute value may contain entity references, an 
 * Attr 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.
 * 

Note: In DOM Level 2, the method normalize is * inherited from the Node interface where it was moved. *

See also the Document Object Model (DOM) Level 3 Core Specification. */ public interface Element extends Node { /** * The name of the element. If Node.localName is different * from null, this attribute is a qualified name. For * example, in: *

 <elementExample id="demo"> ... 
     * </elementExample> , 
* tagName has the value * "elementExample". Note that this is case-preserving in * XML, as are all of the operations of the DOM. The HTML DOM returns * the tagName of an HTML element in the canonical * uppercase form, regardless of the case in the source HTML document. */ public String getTagName(); /** * Retrieves an attribute value by name. * @param name The name of the attribute to retrieve. * @return The Attr value as a string, or the empty string * if that attribute does not have a specified or default value. */ public String getAttribute(String name); /** * 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 Attr node plus any * Text and EntityReference nodes, build the * appropriate subtree, and use setAttributeNode to assign * it as the value of an attribute. *
To set an attribute with a qualified name and namespace URI, use * the setAttributeNS method. * @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 is not an XML * name according to the XML version in use specified in the * Document.xmlVersion attribute. *
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. */ public void setAttribute(String name, String value) throws DOMException; /** * Removes an attribute by name. If a default value for the removed * attribute is defined in the DTD, a new attribute immediately appears * with the default value as well as the corresponding namespace URI, * local name, and prefix when applicable. The implementation may handle * default values from other schemas similarly but applications should * use Document.normalizeDocument() to guarantee this * information is up-to-date. *
If no attribute with this name is found, this method has no effect. *
To remove an attribute by local name and namespace URI, use the * removeAttributeNS method. * @param name The name of the attribute to remove. * @exception DOMException * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. */ public void removeAttribute(String name) throws DOMException; /** * Retrieves an attribute node by name. *
To retrieve an attribute node by qualified name and namespace URI, * use the getAttributeNodeNS method. * @param name The name (nodeName) of the attribute to * retrieve. * @return The Attr node with the specified name ( * nodeName) or null if there is no such * attribute. */ public Attr getAttributeNode(String name); /** * Adds a new attribute node. If an attribute with that name ( * nodeName) is already present in the element, it is * replaced by the new one. Replacing an attribute node by itself has no * effect. *
To add a new attribute node with a qualified name and namespace * URI, use the setAttributeNodeNS method. * @param newAttr The Attr node to add to the attribute list. * @return If the newAttr attribute replaces an existing * attribute, the replaced Attr node is returned, * otherwise null is returned. * @exception DOMException * WRONG_DOCUMENT_ERR: Raised if newAttr was created from a * different document than the one that created the element. *
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
INUSE_ATTRIBUTE_ERR: Raised if newAttr is already an * attribute of another Element object. The DOM user must * explicitly clone Attr nodes to re-use them in other * elements. */ public Attr setAttributeNode(Attr newAttr) throws DOMException; /** * Removes the specified attribute node. If a default value for the * removed Attr node is defined in the DTD, a new node * immediately appears with the default value as well as the * corresponding namespace URI, local name, and prefix when applicable. * The implementation may handle default values from other schemas * similarly but applications should use * Document.normalizeDocument() to guarantee this * information is up-to-date. * @param oldAttr The Attr node to remove from the attribute * list. * @return The Attr node that was removed. * @exception DOMException * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
NOT_FOUND_ERR: Raised if oldAttr is not an attribute * of the element. */ public Attr removeAttributeNode(Attr oldAttr) throws DOMException; /** * Returns a NodeList of all descendant Elements * with a given tag name, in document order. * @param name The name of the tag to match on. The special value "*" * matches all tags. * @return A list of matching Element nodes. */ public NodeList getElementsByTagName(String name); /** * Retrieves an attribute value by local name and namespace URI. *
Per [XML Namespaces] * , applications must use the value null as the * namespaceURI parameter for methods if they wish to have * no namespace. * @param namespaceURI The namespace URI of the attribute to retrieve. * @param localName The local name of the attribute to retrieve. * @return The Attr value as a string, or the empty string * if that attribute does not have a specified or default value. * @exception DOMException * NOT_SUPPORTED_ERR: May be raised if the implementation does not * support the feature "XML" and the language exposed * through the Document does not support XML Namespaces (such as [HTML 4.01]). * @since DOM Level 2 */ public String getAttributeNS(String namespaceURI, String localName) throws DOMException; /** * 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 qualifiedName, and * its value is changed to be 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 Attr node plus any Text and * EntityReference nodes, build the appropriate subtree, * and use setAttributeNodeNS or * setAttributeNode to assign it as the value of an * attribute. *
Per [XML Namespaces] * , applications must use the value null as the * namespaceURI parameter for methods if they wish to have * no namespace. * @param namespaceURI The namespace URI of the attribute to create or * alter. * @param qualifiedName The qualified name 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 is not * an XML name according to the XML version in use specified in the * Document.xmlVersion attribute. *
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
NAMESPACE_ERR: Raised if the qualifiedName is * malformed per the Namespaces in XML specification, if the * qualifiedName has a prefix and the * namespaceURI is null, if the * qualifiedName has a prefix that is "xml" and the * namespaceURI is different from " * http://www.w3.org/XML/1998/namespace", if the qualifiedName or its prefix is "xmlns" and the * namespaceURI is different from "http://www.w3.org/2000/xmlns/", or if the namespaceURI is "http://www.w3.org/2000/xmlns/" and neither the qualifiedName nor its prefix is "xmlns". *
NOT_SUPPORTED_ERR: May be raised if the implementation does not * support the feature "XML" and the language exposed * through the Document does not support XML Namespaces (such as [HTML 4.01]). * @since DOM Level 2 */ public void setAttributeNS(String namespaceURI, String qualifiedName, String value) throws DOMException; /** * Removes an attribute by local name and namespace URI. If a default * value for the removed attribute is defined in the DTD, a new * attribute immediately appears with the default value as well as the * corresponding namespace URI, local name, and prefix when applicable. * The implementation may handle default values from other schemas * similarly but applications should use * Document.normalizeDocument() to guarantee this * information is up-to-date. *
If no attribute with this local name and namespace URI is found, * this method has no effect. *
Per [XML Namespaces] * , applications must use the value null as the * namespaceURI parameter for methods if they wish to have * no namespace. * @param namespaceURI The namespace URI of the attribute to remove. * @param localName The local name of the attribute to remove. * @exception DOMException * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
NOT_SUPPORTED_ERR: May be raised if the implementation does not * support the feature "XML" and the language exposed * through the Document does not support XML Namespaces (such as [HTML 4.01]). * @since DOM Level 2 */ public void removeAttributeNS(String namespaceURI, String localName) throws DOMException; /** * Retrieves an Attr node by local name and namespace URI. *
Per [XML Namespaces] * , applications must use the value null as the * namespaceURI parameter for methods if they wish to have * no namespace. * @param namespaceURI The namespace URI of the attribute to retrieve. * @param localName The local name of the attribute to retrieve. * @return The Attr node with the specified attribute local * name and namespace URI or null if there is no such * attribute. * @exception DOMException * NOT_SUPPORTED_ERR: May be raised if the implementation does not * support the feature "XML" and the language exposed * through the Document does not support XML Namespaces (such as [HTML 4.01]). * @since DOM Level 2 */ public Attr getAttributeNodeNS(String namespaceURI, String localName) throws DOMException; /** * Adds a new attribute. If an attribute with that local name and that * namespace URI is already present in the element, it is replaced by * the new one. Replacing an attribute node by itself has no effect. *
Per [XML Namespaces] * , applications must use the value null as the * namespaceURI parameter for methods if they wish to have * no namespace. * @param newAttr The Attr node to add to the attribute list. * @return If the newAttr attribute replaces an existing * attribute with the same local name and namespace URI, the replaced * Attr node is returned, otherwise null is * returned. * @exception DOMException * WRONG_DOCUMENT_ERR: Raised if newAttr was created from a * different document than the one that created the element. *
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
INUSE_ATTRIBUTE_ERR: Raised if newAttr is already an * attribute of another Element object. The DOM user must * explicitly clone Attr nodes to re-use them in other * elements. *
NOT_SUPPORTED_ERR: May be raised if the implementation does not * support the feature "XML" and the language exposed * through the Document does not support XML Namespaces (such as [HTML 4.01]). * @since DOM Level 2 */ public Attr setAttributeNodeNS(Attr newAttr) throws DOMException; /** * Returns a NodeList of all the descendant * Elements with a given local name and namespace URI in * document order. * @param namespaceURI The namespace URI of the elements to match on. The * special value "*" matches all namespaces. * @param localName The local name of the elements to match on. The * special value "*" matches all local names. * @return A new NodeList object containing all the matched * Elements. * @exception DOMException * NOT_SUPPORTED_ERR: May be raised if the implementation does not * support the feature "XML" and the language exposed * through the Document does not support XML Namespaces (such as [HTML 4.01]). * @since DOM Level 2 */ public NodeList getElementsByTagNameNS(String namespaceURI, String localName) throws DOMException; /** * Returns true when an attribute with a given name is * specified on this element or has a default value, false * otherwise. * @param name The name of the attribute to look for. * @return true if an attribute with the given name is * specified on this element or has a default value, false * otherwise. * @since DOM Level 2 */ public boolean hasAttribute(String name); /** * Returns true when an attribute with a given local name and * namespace URI is specified on this element or has a default value, * false otherwise. *
Per [XML Namespaces] * , applications must use the value null as the * namespaceURI parameter for methods if they wish to have * no namespace. * @param namespaceURI The namespace URI of the attribute to look for. * @param localName The local name of the attribute to look for. * @return true if an attribute with the given local name * and namespace URI is specified or has a default value on this * element, false otherwise. * @exception DOMException * NOT_SUPPORTED_ERR: May be raised if the implementation does not * support the feature "XML" and the language exposed * through the Document does not support XML Namespaces (such as [HTML 4.01]). * @since DOM Level 2 */ public boolean hasAttributeNS(String namespaceURI, String localName) throws DOMException; /** * The type information associated with this element. * @since DOM Level 3 */ public TypeInfo getSchemaTypeInfo(); /** * If the parameter isId is true, this method * declares the specified attribute to be a user-determined ID attribute * . This affects the value of Attr.isId and the behavior * of Document.getElementById, but does not change any * schema that may be in use, in particular this does not affect the * Attr.schemaTypeInfo of the specified Attr * node. Use the value false for the parameter * isId to undeclare an attribute for being a * user-determined ID attribute. *
To specify an attribute by local name and namespace URI, use the * setIdAttributeNS method. * @param name The name of the attribute. * @param isId Whether the attribute is a of type ID. * @exception DOMException * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
NOT_FOUND_ERR: Raised if the specified node is not an attribute * of this element. * @since DOM Level 3 */ public void setIdAttribute(String name, boolean isId) throws DOMException; /** * If the parameter isId is true, this method * declares the specified attribute to be a user-determined ID attribute * . This affects the value of Attr.isId and the behavior * of Document.getElementById, but does not change any * schema that may be in use, in particular this does not affect the * Attr.schemaTypeInfo of the specified Attr * node. Use the value false for the parameter * isId to undeclare an attribute for being a * user-determined ID attribute. * @param namespaceURI The namespace URI of the attribute. * @param localName The local name of the attribute. * @param isId Whether the attribute is a of type ID. * @exception DOMException * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
NOT_FOUND_ERR: Raised if the specified node is not an attribute * of this element. * @since DOM Level 3 */ public void setIdAttributeNS(String namespaceURI, String localName, boolean isId) throws DOMException; /** * If the parameter isId is true, this method * declares the specified attribute to be a user-determined ID attribute * . This affects the value of Attr.isId and the behavior * of Document.getElementById, but does not change any * schema that may be in use, in particular this does not affect the * Attr.schemaTypeInfo of the specified Attr * node. Use the value false for the parameter * isId to undeclare an attribute for being a * user-determined ID attribute. * @param idAttr The attribute node. * @param isId Whether the attribute is a of type ID. * @exception DOMException * NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. *
NOT_FOUND_ERR: Raised if the specified node is not an attribute * of this element. * @since DOM Level 3 */ public void setIdAttributeNode(Attr idAttr, boolean isId) throws DOMException; }




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