Xerces2 Implementation: Class AttrImpl

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## org.apache.xerces.impl.xs.opti
Class AttrImpl

    java.lang.Object
      |
      +--org.apache.xerces.impl.xs.opti.DefaultNode
            |
            +--org.apache.xerces.impl.xs.opti.NodeImpl
                  |
                  +--org.apache.xerces.impl.xs.opti.AttrImpl

All Implemented Interfaces:
  org.w3c.dom.Attr, org.w3c.dom.Node

public class AttrImpl
extends NodeImpl
implements org.w3c.dom.Attr

This class represents a single attribute.

# INTERNAL:

  Usage of this class is not supported. It may be altered or removed at any time.

Version:
  $Id: AttrImpl.java 446728 2006-09-15 20:43:46Z mrglavas $
Author:
  Rahul Srivastava, Sun Microsystems Inc.

Fields inherited from interface org.w3c.dom.Node
`ATTRIBUTE_NODE, CDATA_SECTION_NODE, COMMENT_NODE, DOCUMENT_FRAGMENT_NODE, DOCUMENT_NODE, DOCUMENT_POSITION_CONTAINED_BY, DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, DOCUMENT_POSITION_PRECEDING, DOCUMENT_TYPE_NODE, ELEMENT_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE, NOTATION_NODE, PROCESSING_INSTRUCTION_NODE, TEXT_NODE`

Constructor Summary
`AttrImpl()` Default Constructor
`AttrImpl(org.w3c.dom.Element element, java.lang.String prefix, java.lang.String localpart, java.lang.String rawname, java.lang.String uri, java.lang.String value)` Constructs an attribute.

Method Summary
`java.lang.String` | `getName()` Returns the name of this attribute.
`org.w3c.dom.Element` | `getOwnerElement()` The `Element` node this attribute is attached to or `null` if this attribute is not in use.
`org.w3c.dom.TypeInfo` | `getSchemaTypeInfo()` Method getSchemaTypeInfo.
`boolean` | `getSpecified()` `True` if this attribute was explicitly given a value in the instance document, `false` otherwise.
`java.lang.String` | `getValue()` On retrieval, the value of the attribute is returned as a string.
`boolean` | `isId()` Returns whether this attribute is known to be of type ID (i.e.
`void` | `setValue(java.lang.String value)` On retrieval, the value of the attribute is returned as a string.

Methods inherited from class org.apache.xerces.impl.xs.opti.NodeImpl
`getLocalName, getNamespaceURI, getNodeName, getNodeType, getPrefix, getReadOnly, setReadOnly`

Methods inherited from class org.apache.xerces.impl.xs.opti.DefaultNode
`appendChild, cloneNode, compareDocumentPosition, getAttributes, getBaseURI, getChildNodes, getFeature, getFirstChild, getLastChild, getNextSibling, getNodeValue, getOwnerDocument, getParentNode, getPreviousSibling, getTextContent, getUserData, hasAttributes, hasChildNodes, insertBefore, isDefaultNamespace, isEqualNode, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeChild, replaceChild, setNodeValue, setPrefix, setTextContent, setUserData`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.w3c.dom.Node
`appendChild, cloneNode, compareDocumentPosition, getAttributes, getBaseURI, getChildNodes, getFeature, getFirstChild, getLastChild, getLocalName, getNamespaceURI, getNextSibling, getNodeName, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getTextContent, getUserData, hasAttributes, hasChildNodes, insertBefore, isDefaultNamespace, isEqualNode, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeChild, replaceChild, setNodeValue, setPrefix, setTextContent, setUserData`

Constructor Detail

### AttrImpl

    public AttrImpl()

  Default Constructor

### AttrImpl

    public AttrImpl(org.w3c.dom.Element element,
                    java.lang.String prefix,
                    java.lang.String localpart,
                    java.lang.String rawname,
                    java.lang.String uri,
                    java.lang.String value)

  Constructs an attribute.
  Parameters:
    `element` - Element which owns this attribute
    `prefix` - The QName prefix.
    `localpart` - The QName localpart.
    `rawname` - The QName rawname.
    `uri` - The uri binding for the associated prefix.
    `value` - The value of the attribute.

Method Detail

### getName

    public java.lang.String getName()

  Description copied from interface: `org.w3c.dom.Attr`
  Returns the name of this attribute. If `Node.localName` is different from `null`, this attribute is a qualified name.
  Specified by:
    `getName` in interface `org.w3c.dom.Attr`

### getSpecified

    public boolean getSpecified()

  Description copied from interface: `org.w3c.dom.Attr`
  `True` if this attribute was explicitly given a value in the instance document, `false` otherwise. If the application changed the value of this attribute node (even if it ends up having the same value as the default value) then it is set to `true`. The implementation may handle attributes with default values from other schemas similarly but applications should use `Document.normalizeDocument()` to guarantee this information is up-to-date.
  Specified by:
    `getSpecified` in interface `org.w3c.dom.Attr`

### getValue

    public java.lang.String getValue()

  Description copied from interface: `org.w3c.dom.Attr`
  On retrieval, the value of the attribute is returned as a string. Character and general entity references are replaced with their values. See also the method `getAttribute` on the `Element` interface.
  On setting, this creates a `Text` node with the unparsed contents of the string, i.e. any characters that an XML processor would recognize as markup are instead treated as literal text. See also the method `Element.setAttribute()`.
  Some specialized implementations, such as some [SVG 1.1] implementations, may do normalization automatically, even after mutation; in such case, the value on retrieval may differ from the value on setting.
  Specified by:
    `getValue` in interface `org.w3c.dom.Attr`

### getOwnerElement

    public org.w3c.dom.Element getOwnerElement()

  Description copied from interface: `org.w3c.dom.Attr`
  The `Element` node this attribute is attached to or `null` if this attribute is not in use.
  Specified by:
    `getOwnerElement` in interface `org.w3c.dom.Attr`

### setValue

    public void setValue(java.lang.String value)
                  throws org.w3c.dom.DOMException

  Description copied from interface: `org.w3c.dom.Attr`
  On retrieval, the value of the attribute is returned as a string. Character and general entity references are replaced with their values. See also the method `getAttribute` on the `Element` interface.
  On setting, this creates a `Text` node with the unparsed contents of the string, i.e. any characters that an XML processor would recognize as markup are instead treated as literal text. See also the method `Element.setAttribute()`.
  Some specialized implementations, such as some [SVG 1.1] implementations, may do normalization automatically, even after mutation; in such case, the value on retrieval may differ from the value on setting.
  Specified by:
    `setValue` in interface `org.w3c.dom.Attr`
  Following copied from interface: `org.w3c.dom.Attr`
  Throws:
    `org.w3c.dom.DOMException` - NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.

### isId

    public boolean isId()

  Description copied from interface: `org.w3c.dom.Attr`
  Returns whether this attribute is known to be of type ID (i.e. to contain an identifier for its owner element) or not. When it is and its value is unique, the `ownerElement` of this attribute can be retrieved using the method `Document.getElementById` . The implementation could use several ways to determine if an attribute node is known to contain an identifier:
  - If validation occurred using an XML Schema [XML Schema Part 1] while loading the document or while invoking `Document.normalizeDocument()`, the post-schema-validation infoset contributions (PSVI contributions) values are used to determine if this attribute is a schema-determined ID attribute using the schema-determined ID definition in [XPointer] .
  - If validation occurred using a DTD while loading the document or while invoking `Document.normalizeDocument()`, the infoset [type definition] value is used to determine if this attribute is a DTD-determined ID attribute using the DTD-determined ID definition in [XPointer] .
  - from the use of the methods `Element.setIdAttribute()`, `Element.setIdAttributeNS()`, or `Element.setIdAttributeNode()`, i.e. it is an user-determined ID attribute;

    Note: XPointer framework (see section 3.2 in [XPointer] ) consider the DOM user-determined ID attribute as being part of the XPointer externally-determined ID definition.

  - using mechanisms that are outside the scope of this specification, it is then an externally-determined ID attribute. This includes using schema languages different from XML schema and DTD.
  If validation occurred while invoking `Document.normalizeDocument()`, all user-determined ID attributes are reset and all attribute nodes ID information are then reevaluated in accordance to the schema used. As a consequence, if the `Attr.schemaTypeInfo` attribute contains an ID type, `isId` will always return true.
  Specified by:
    `isId` in interface `org.w3c.dom.Attr`
  Since:
    DOM Level 3

### getSchemaTypeInfo

    public org.w3c.dom.TypeInfo getSchemaTypeInfo()

  Method getSchemaTypeInfo.
  Specified by:
    `getSchemaTypeInfo` in interface `org.w3c.dom.Attr`
  Returns:
    TypeInfo

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