org.apache.xerces.dom: public final class: DeferredAttrImpl

org.apache.xerces.dom
public final class: DeferredAttrImpl [javadoc | source]

java.lang.Object
   org.apache.xerces.dom.NodeImpl
      org.apache.xerces.dom.AttrImpl
         org.apache.xerces.dom.DeferredAttrImpl

All Implemented Interfaces:
DeferredNode, TypeInfo, Attr, Cloneable, Node, EventTarget, Serializable, NodeList

Attribute represents an XML-style attribute of an Element. Typically, the allowable values are controlled by its declaration in the Document Type Definition (DTD) governing this kind of document.

If the attribute has not been explicitly assigned a value, but has been declared in the DTD, it will exist and have that default. Only if neither the document nor the DTD specifies a value will the Attribute really be considered absent and have no value; in that case, querying the attribute will return null.

Attributes may have multiple children that contain their data. (XML allows attributes to contain entity references, and tokenized attribute types such as NMTOKENS may have a child for each token.) For convenience, the Attribute object's getValue() method returns the string version of the attribute's value.

Attributes are not children of the Elements they belong to, in the usual sense, and have no valid Parent reference. However, the spec says they _do_ belong to a specific Element, and an INUSE exception is to be thrown if the user attempts to explicitly share them between elements.

Note that Elements do not permit attributes to appear to be shared (see the INUSE exception), so this object's mutability is officially not an issue.

DeferredAttrImpl inherits from AttrImpl which does not support Namespaces. DeferredAttrNSImpl, which inherits from AttrNSImpl, does.

Also see:

DeferredAttrNSImpl

xerces.internal:

author: Andy - Clark, IBM

author: Arnaud - Le Hors, IBM

version: $ - Id: DeferredAttrImpl.java 447266 2006-09-18 05:57:49Z mrglavas $

since: PR-DOM-Level-1-19980818. -

Field Summary
static final long	serialVersionUID	Serialization version.
protected transient int	fNodeIndex	Node index.

Fields inherited from org.apache.xerces.dom.AttrImpl:
serialVersionUID, DTD_URI, value, name, type, textNode

Fields inherited from org.apache.xerces.dom.NodeImpl:
TREE_POSITION_PRECEDING, TREE_POSITION_FOLLOWING, TREE_POSITION_ANCESTOR, TREE_POSITION_DESCENDANT, TREE_POSITION_EQUIVALENT, TREE_POSITION_SAME_NODE, TREE_POSITION_DISCONNECTED, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_PRECEDING, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_IS_CONTAINED, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, serialVersionUID, ELEMENT_DEFINITION_NODE, ownerNode, flags, READONLY, SYNCDATA, SYNCCHILDREN, OWNED, FIRSTCHILD, SPECIFIED, IGNORABLEWS, HASSTRING, NORMALIZED, ID

Fields inherited from org.apache.xerces.dom.NodeImpl:

TREE_POSITION_PRECEDING, TREE_POSITION_FOLLOWING, TREE_POSITION_ANCESTOR, TREE_POSITION_DESCENDANT, TREE_POSITION_EQUIVALENT, TREE_POSITION_SAME_NODE, TREE_POSITION_DISCONNECTED, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_PRECEDING, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_IS_CONTAINED, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, serialVersionUID, ELEMENT_DEFINITION_NODE, ownerNode, flags, READONLY, SYNCDATA, SYNCCHILDREN, OWNED, FIRSTCHILD, SPECIFIED, IGNORABLEWS, HASSTRING, NORMALIZED, ID

Constructor:
DeferredAttrImpl(DeferredDocumentImpl ownerDocument, int nodeIndex) { // // Constructors // super(ownerDocument, null); fNodeIndex = nodeIndex; needsSyncData(true); needsSyncChildren(true); } This is the deferred constructor. Only the fNodeIndex is given here. All other data, can be requested from the ownerDocument via the index.

Constructor:

 DeferredAttrImpl(DeferredDocumentImpl ownerDocument,
    int nodeIndex) {
    //
    // Constructors
    //
        super(ownerDocument, null);
        fNodeIndex = nodeIndex;
        needsSyncData(true);
        needsSyncChildren(true);
}

This is the deferred constructor. Only the fNodeIndex is given here. All other data, can be requested from the ownerDocument via the index.

Method from org.apache.xerces.dom.DeferredAttrImpl Summary:
getNodeIndex, synchronizeChildren, synchronizeData

Methods from org.apache.xerces.dom.AttrImpl:
checkNormalizationAfterInsert, checkNormalizationAfterRemove, cloneNode, getChildNodes, getElement, getFirstChild, getLastChild, getLength, getName, getNodeName, getNodeType, getNodeValue, getOwnerElement, getSchemaTypeInfo, getSpecified, getTypeName, getTypeNamespace, getValue, hasChildNodes, insertBefore, internalInsertBefore, internalRemoveChild, isDerivedFrom, isEqualNode, isId, item, lastChild, lastChild, makeChildNode, normalize, removeChild, rename, replaceChild, setIdAttribute, setNodeValue, setOwnerDocument, setReadOnly, setSpecified, setType, setValue, synchronizeChildren, toString

Methods from org.apache.xerces.dom.AttrImpl:

checkNormalizationAfterInsert, checkNormalizationAfterRemove, cloneNode, getChildNodes, getElement, getFirstChild, getLastChild, getLength, getName, getNodeName, getNodeType, getNodeValue, getOwnerElement, getSchemaTypeInfo, getSpecified, getTypeName, getTypeNamespace, getValue, hasChildNodes, insertBefore, internalInsertBefore, internalRemoveChild, isDerivedFrom, isEqualNode, isId, item, lastChild, lastChild, makeChildNode, normalize, removeChild, rename, replaceChild, setIdAttribute, setNodeValue, setOwnerDocument, setReadOnly, setSpecified, setType, setValue, synchronizeChildren, toString

Methods from org.apache.xerces.dom.NodeImpl:
addEventListener, appendChild, changed, changes, cloneNode, compareDocumentPosition, compareTreePosition, dispatchEvent, getAttributes, getBaseURI, getChildNodes, getContainer, getElementAncestor, getFeature, getFirstChild, getLastChild, getLength, getLocalName, getNamespaceURI, getNextSibling, getNodeName, getNodeNumber, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getReadOnly, getTextContent, getTextContent, getUserData, getUserData, getUserDataRecord, hasAttributes, hasChildNodes, hasStringValue, hasStringValue, insertBefore, internalIsIgnorableWhitespace, isDefaultNamespace, isEqualNode, isFirstChild, isFirstChild, isIdAttribute, isIdAttribute, isIgnorableWhitespace, isNormalized, isNormalized, isOwned, isOwned, isReadOnly, isReadOnly, isSameNode, isSpecified, isSpecified, isSupported, item, lookupNamespacePrefix, lookupNamespaceURI, lookupPrefix, needsSyncChildren, needsSyncChildren, needsSyncData, needsSyncData, normalize, ownerDocument, parentNode, previousSibling, removeChild, removeEventListener, replaceChild, setNodeValue, setOwnerDocument, setPrefix, setReadOnly, setTextContent, setUserData, setUserData, synchronizeData, toString

Methods from org.apache.xerces.dom.NodeImpl:

addEventListener, appendChild, changed, changes, cloneNode, compareDocumentPosition, compareTreePosition, dispatchEvent, getAttributes, getBaseURI, getChildNodes, getContainer, getElementAncestor, getFeature, getFirstChild, getLastChild, getLength, getLocalName, getNamespaceURI, getNextSibling, getNodeName, getNodeNumber, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getReadOnly, getTextContent, getTextContent, getUserData, getUserData, getUserDataRecord, hasAttributes, hasChildNodes, hasStringValue, hasStringValue, insertBefore, internalIsIgnorableWhitespace, isDefaultNamespace, isEqualNode, isFirstChild, isFirstChild, isIdAttribute, isIdAttribute, isIgnorableWhitespace, isNormalized, isNormalized, isOwned, isOwned, isReadOnly, isReadOnly, isSameNode, isSpecified, isSpecified, isSupported, item, lookupNamespacePrefix, lookupNamespaceURI, lookupPrefix, needsSyncChildren, needsSyncChildren, needsSyncData, needsSyncData, normalize, ownerDocument, parentNode, previousSibling, removeChild, removeEventListener, replaceChild, setNodeValue, setOwnerDocument, setPrefix, setReadOnly, setTextContent, setUserData, setUserData, synchronizeData, toString

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.apache.xerces.dom.DeferredAttrImpl Detail:
public int getNodeIndex() { return fNodeIndex; } Returns the node index.
protected void synchronizeChildren() { DeferredDocumentImpl ownerDocument = (DeferredDocumentImpl) ownerDocument(); ownerDocument.synchronizeChildren(this, fNodeIndex); } Synchronizes the node's children with the internal structure. Fluffing the children at once solves a lot of work to keep the two structures in sync. The problem gets worse when editing the tree -- this makes it a lot easier.
protected void synchronizeData() { // no need to sync in the future needsSyncData(false); // fluff data DeferredDocumentImpl ownerDocument = (DeferredDocumentImpl) ownerDocument(); name = ownerDocument.getNodeName(fNodeIndex); int extra = ownerDocument.getNodeExtra(fNodeIndex); isSpecified((extra & SPECIFIED) != 0); isIdAttribute((extra & ID) != 0); int extraNode = ownerDocument.getLastChild(fNodeIndex); type = ownerDocument.getTypeInfo(extraNode); } Synchronizes the data (name and value) for fast nodes.

Method from org.apache.xerces.dom.DeferredAttrImpl Detail:

 public int getNodeIndex() {
        return fNodeIndex;
}

Returns the node index.

 protected  void synchronizeChildren() {
        DeferredDocumentImpl ownerDocument =
            (DeferredDocumentImpl) ownerDocument();
        ownerDocument.synchronizeChildren(this, fNodeIndex);
}

Synchronizes the node's children with the internal structure. Fluffing the children at once solves a lot of work to keep the two structures in sync. The problem gets worse when editing the tree -- this makes it a lot easier.

 protected  void synchronizeData() {
        // no need to sync in the future
        needsSyncData(false);
        // fluff data
        DeferredDocumentImpl ownerDocument =
            (DeferredDocumentImpl) ownerDocument();
        name = ownerDocument.getNodeName(fNodeIndex);
        int extra = ownerDocument.getNodeExtra(fNodeIndex);
        isSpecified((extra & SPECIFIED) != 0);
        isIdAttribute((extra & ID) != 0);
        int extraNode = ownerDocument.getLastChild(fNodeIndex);
        type = ownerDocument.getTypeInfo(extraNode);
}

Synchronizes the data (name and value) for fast nodes.