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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;
}