org.w3c.dom.Element Maven / Gradle / Ivy
/*
* Copyright (c) 2000 World Wide Web Consortium,
* (Massachusetts Institute of Technology, Institut National de
* Recherche en Informatique et en Automatique, Keio University). All
* Rights Reserved. This program is distributed under the W3C's Software
* Intellectual Property License. This program is distributed 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.
* See W3C License http://www.w3.org/Consortium/Legal/ for more details.
*/
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.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 2 Core Specification.
*/
public interface Element extends Node {
/**
* The name of the element. 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 contains an
* illegal character.
*
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 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.
*
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.
*
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 the removed Attr
* 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 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 the order in which they are encountered in
* a preorder traversal of this Element tree.
* @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.
*
Documents which do not support the "XML" feature will permit only
* the DOM Level 1 calls for creating/setting elements and attributes.
* Hence, if you specify a non-null namespace URI, these DOMs will never
* find a matching node.
* @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.
* @since DOM Level 2
*/
public String getAttributeNS(String namespaceURI,
String localName);
/**
* 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.
* @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
* contains an illegal character, per the XML 1.0 specification .
*
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", or if the
* qualifiedName, or its prefix, is "xmlns" and the
* namespaceURI is different from "
* http://www.w3.org/2000/xmlns/".
*
NOT_SUPPORTED_ERR: Always thrown if the current document does not
* support the "XML" feature, since namespaces were
* defined by XML.
* @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 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.
*
Documents which do not support the "XML" feature will permit only
* the DOM Level 1 calls for creating/setting elements and attributes.
* Hence, if you specify a non-null namespace URI, these DOMs will never
* find a matching node.
* @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.
* @since DOM Level 2
*/
public void removeAttributeNS(String namespaceURI,
String localName)
throws DOMException;
/**
* Retrieves an Attr node by local name and namespace URI.
*
Documents which do not support the "XML" feature will permit only
* the DOM Level 1 calls for creating/setting elements and attributes.
* Hence, if you specify a non-null namespace URI, these DOMs will never
* find a matching node.
* @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.
* @since DOM Level 2
*/
public Attr getAttributeNodeNS(String namespaceURI,
String localName);
/**
* 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.
* @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: Always thrown if the current document does not
* support the "XML" feature, since namespaces were
* defined by XML.
* @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
* the order in which they are encountered in a preorder traversal of
* this Element tree.
*
Documents which do not support the "XML" feature will permit only
* the DOM Level 1 calls for creating/setting elements and attributes.
* Hence, if you specify a non-null namespace URI, these DOMs will never
* find a matching node.
* @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.
* @since DOM Level 2
*/
public NodeList getElementsByTagNameNS(String namespaceURI,
String localName);
/**
* 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.
*
Documents which do not support the "XML" feature will permit only
* the DOM Level 1 calls for creating/setting elements and attributes.
* Hence, if you specify a non-null namespace URI, these DOMs will never
* find a matching node.
* @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.
* @since DOM Level 2
*/
public boolean hasAttributeNS(String namespaceURI,
String localName);
}