com.icl.saxon.tree

## Class NodeImpl

- java.lang.Object
- - com.icl.saxon.om.AbstractNode
  - - com.icl.saxon.tree.NodeImpl

- All Implemented Interfaces:
    NodeInfo, javax.xml.transform.dom.DOMLocator, javax.xml.transform.Source, javax.xml.transform.SourceLocator, org.w3c.dom.Node
  Direct Known Subclasses:
    DocumentImpl, ElementImpl

      public abstract class NodeImpl
      extends AbstractNode

  A node in the XML parse tree representing an XML element, character content, or attribute.

  This is the top-level class in the implementation class hierarchy; it essentially contains all those methods that can be defined using other primitive methods, without direct access to data.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected static NodeInfo[]` | `emptyArray`
    `protected int` | `index`
    `protected com.icl.saxon.tree.ParentNodeImpl` | `parent`

    - ### Fields inherited from class com.icl.saxon.om.AbstractNode

      `NODE_LETTER`

    - ### 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`

    - ### Fields inherited from interface com.icl.saxon.om.NodeInfo

      `ATTRIBUTE, COMMENT, ELEMENT, NAMESPACE, NODE, NONE, NUMBER_OF_TYPES, PI, ROOT, TEXT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `NodeImpl()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `compareOrder(NodeInfo other)` Determine the relative position of this node and another node, in document order.
    `java.lang.String` | `generateId()` Get a character string that uniquely identifies this node within this document (The calling code will prepend a document identifier)
    `org.w3c.dom.NamedNodeMap` | `getAttributes()` Return a `NamedNodeMap` containing the attributes of this node (if it is an `Element` ) or `null` otherwise.
    `java.lang.String` | `getAttributeValue(int fingerprint)` Get the value of a given attribute of this node
    `java.lang.String` | `getAttributeValue(java.lang.String uri, java.lang.String localName)` Find the value of a given attribute of this node.
    `java.lang.String` | `getBaseURI()` Get the base URI for the node.
    `org.w3c.dom.NodeList` | `getChildNodes()` Return a `NodeList` that contains all children of this node.
    `java.lang.String` | `getDisplayName()` Get the display name of this node.
    `org.w3c.dom.Element` | `getDocumentElement()` Get the outermost element.
    `DocumentInfo` | `getDocumentRoot()` Get the root (document) node
    `AxisEnumeration` | `getEnumeration(byte axisNumber, NodeTest nodeTest)` Return an enumeration over the nodes reached by the given axis from this node
    `int` | `getFingerprint()` Get the fingerprint of the node.
    `org.w3c.dom.Node` | `getFirstChild()` Get first child - default implementation used for leaf nodes
    `org.w3c.dom.Node` | `getLastChild()` Get last child - default implementation used for leaf nodes
    `int` | `getLineNumber()` Get the line number of the node within its source document entity
    `java.lang.String` | `getLocalName()` Get the local name of this node.
    `int` | `getNameCode()` Get the nameCode of the node.
    `NamePool` | `getNamePool()` Get the NamePool
    `NodeImpl` | `getNextInDocument(NodeImpl anchor)` Get the next node in document order
    `org.w3c.dom.Node` | `getNextSibling()` Get next sibling node
    `org.w3c.dom.Node` | `getOriginatingNode()` Get the node corresponding to this javax.xml.transform.dom.DOMLocator
    `NodeInfo` | `getParent()` Find the parent node of this node.
    `java.lang.String` | `getPrefix()` Get the prefix part of the name of this node.
    `NodeImpl` | `getPreviousInDocument()` Get the previous node in document order
    `org.w3c.dom.Node` | `getPreviousSibling()` Get the previous sibling of the node
    `protected long` | `getSequenceNumber()` Get the node sequence number (in document order).
    `java.lang.String` | `getSystemId()` Get the system ID for the node.
    `java.lang.String` | `getURI()` Get the URI part of the name of this node.
    `boolean` | `hasAttributes()` Returns whether this node (if it is an element) has any attributes.
    `boolean` | `hasChildNodes()` Determine whether the node has any children.
    `boolean` | `isSameNodeInfo(NodeInfo other)` Determine whether this is the same node as another node
    `void` | `outputNamespaceNodes(Outputter out, boolean includeAncestors)` Output all namespace nodes associated with this element.
    `void` | `removeNode()` Remove this node from the tree.
    `void` | `setSystemId(java.lang.String uri)` Set the system ID of this node.

    - ### Methods inherited from class com.icl.saxon.om.AbstractNode

      `appendChild, appendData, cloneNode, compareDocumentPosition, copyStringValue, createAttribute, createAttributeNS, createCDATASection, createComment, createDocumentFragment, createElement, createElementNS, createEntityReference, createProcessingInstruction, createTextNode, deleteData, disallowUpdate, getAttribute, getAttributeNode, getAttributeNodeNS, getAttributeNS, getColumnNumber, getData, getDoctype, getElementById, getElementsByTagName, getElementsByTagNameNS, getFeature, getImplementation, getLength, getName, getNamespaceURI, getNodeName, getNodeValue, getOwnerDocument, getOwnerElement, getParentNode, getPublicId, getSchemaTypeInfo, getSpecified, getTagName, getTextContent, getUserData, getValue, getWholeText, hasAttribute, hasAttributeNS, importNode, insertBefore, insertData, isDefaultNamespace, isElementContentWhitespace, isEqualNode, isId, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeAttribute, removeAttributeNode, removeAttributeNS, removeChild, replaceChild, replaceData, replaceWholeText, setAttributeNode, setAttributeNodeNS, setAttributeNS, setData, setIdAttribute, setIdAttributeNode, setIdAttributeNS, setNodeValue, setPrefix, setTextContent, setUserData, setValue, splitText, substringData, supports`

    - ### 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

      `getNodeType`

    - ### Methods inherited from interface com.icl.saxon.om.NodeInfo

      `copy, getNodeType, getStringValue`

- - ### Field Detail

    - #### emptyArray

          protected static NodeInfo[] emptyArray

    - #### parent

          protected com.icl.saxon.tree.ParentNodeImpl parent

    - #### index

          protected int index

  - ### Constructor Detail

    - #### NodeImpl

          public NodeImpl()

  - ### Method Detail

    - #### setSystemId

          public void setSystemId(java.lang.String uri)

      Set the system ID of this node. This method is provided so that a NodeInfo implements the javax.xml.transform.Source interface, allowing a node to be used directly as the Source of a transformation

    - #### isSameNodeInfo

          public boolean isSameNodeInfo(NodeInfo other)

      Determine whether this is the same node as another node
      Specified by:
        `isSameNodeInfo` in interface `NodeInfo`
      Specified by:
        `isSameNodeInfo` in class `AbstractNode`
      Returns:
        true if this Node object and the supplied Node object represent the same node in the tree.

    - #### getNameCode

          public int getNameCode()

      Get the nameCode of the node. This is used to locate the name in the NamePool
      Specified by:
        `getNameCode` in interface `NodeInfo`
      Specified by:
        `getNameCode` in class `AbstractNode`
      See Also:
        `allocate`, `getFingerprint`

    - #### getFingerprint

          public int getFingerprint()

      Get the fingerprint of the node. This is used to compare whether two nodes have equivalent names. Return -1 for a node with no name.
      Specified by:
        `getFingerprint` in interface `NodeInfo`
      Specified by:
        `getFingerprint` in class `AbstractNode`

    - #### generateId

          public java.lang.String generateId()

      Get a character string that uniquely identifies this node within this document (The calling code will prepend a document identifier)
      Specified by:
        `generateId` in interface `NodeInfo`
      Specified by:
        `generateId` in class `AbstractNode`
      Returns:
        a string.

    - #### getOriginatingNode

          public org.w3c.dom.Node getOriginatingNode()

      Get the node corresponding to this javax.xml.transform.dom.DOMLocator
      Specified by:
        `getOriginatingNode` in interface `javax.xml.transform.dom.DOMLocator`
      Overrides:
        `getOriginatingNode` in class `AbstractNode`

    - #### getSystemId

          public java.lang.String getSystemId()

      Get the system ID for the node. Default implementation for child nodes.
      Specified by:
        `getSystemId` in interface `NodeInfo`
      Specified by:
        `getSystemId` in interface `javax.xml.transform.Source`
      Specified by:
        `getSystemId` in interface `javax.xml.transform.SourceLocator`
      Specified by:
        `getSystemId` in class `AbstractNode`
      Returns:
        the System Identifier of the entity in the source document containing the node, or null if not known. Note this is not the same as the base URI: the base URI can be modified by xml:base, but the system ID cannot.

    - #### getBaseURI

          public java.lang.String getBaseURI()

      Get the base URI for the node. Default implementation for child nodes.
      Specified by:
        `getBaseURI` in interface `NodeInfo`
      Specified by:
        `getBaseURI` in interface `org.w3c.dom.Node`
      Specified by:
        `getBaseURI` in class `AbstractNode`

    - #### getSequenceNumber

          protected long getSequenceNumber()

      Get the node sequence number (in document order). Sequence numbers are monotonic but not consecutive. In the current implementation, parent nodes (elements and roots) have a zero least-significant word, while namespaces, attributes, text nodes, comments, and PIs have the top word the same as their owner and the bottom half reflecting their relative position. This is the default implementation for child nodes.

    - #### compareOrder

          public final int compareOrder(NodeInfo other)

      Determine the relative position of this node and another node, in document order. The other node will always be in the same document.
      Specified by:
        `compareOrder` in interface `NodeInfo`
      Specified by:
        `compareOrder` in class `AbstractNode`
      Parameters:
        `other` - The other node, whose position is to be compared with this node
      Returns:
        -1 if this node precedes the other node, +1 if it follows the other node, or 0 if they are the same node. (In this case, isSameNode() will always return true, and the two nodes will produce the same result for generateId())

    - #### getNamePool

          public NamePool getNamePool()

      Get the NamePool

    - #### getPrefix

          public java.lang.String getPrefix()

      Get the prefix part of the name of this node. This is the name before the ":" if any.
      Specified by:
        `getPrefix` in interface `NodeInfo`
      Specified by:
        `getPrefix` in interface `org.w3c.dom.Node`
      Specified by:
        `getPrefix` in class `AbstractNode`
      Returns:
        the prefix part of the name. For an unnamed node, return an empty string.

    - #### getURI

          public java.lang.String getURI()

      Get the URI part of the name of this node. This is the URI corresponding to the prefix, or the URI of the default namespace if appropriate.
      Specified by:
        `getURI` in interface `NodeInfo`
      Specified by:
        `getURI` in class `AbstractNode`
      Returns:
        The URI of the namespace of this node. For the default namespace, return an empty string. For an unnamed node, return null.

    - #### getDisplayName

          public java.lang.String getDisplayName()

      Get the display name of this node. For elements and attributes this is [prefix:]localname. For unnamed nodes, it is an empty string.
      Specified by:
        `getDisplayName` in interface `NodeInfo`
      Overrides:
        `getDisplayName` in class `AbstractNode`
      Returns:
        The display name of this node. For a node with no name, return an empty string.

    - #### getLocalName

          public java.lang.String getLocalName()

      Get the local name of this node.
      Specified by:
        `getLocalName` in interface `NodeInfo`
      Specified by:
        `getLocalName` in interface `org.w3c.dom.Node`
      Specified by:
        `getLocalName` in class `AbstractNode`
      Returns:
        The local name of this node. For a node with no name, return an empty string.

    - #### getLineNumber

          public int getLineNumber()

      Get the line number of the node within its source document entity
      Specified by:
        `getLineNumber` in interface `NodeInfo`
      Specified by:
        `getLineNumber` in interface `javax.xml.transform.SourceLocator`
      Overrides:
        `getLineNumber` in class `AbstractNode`
      Returns:
        the line number of the node in its original source document; or -1 if not available

    - #### getParent

          public final NodeInfo getParent()

      Find the parent node of this node.
      Specified by:
        `getParent` in interface `NodeInfo`
      Specified by:
        `getParent` in class `AbstractNode`
      Returns:
        The Node object describing the containing element or root node.

    - #### getPreviousSibling

          public org.w3c.dom.Node getPreviousSibling()

      Get the previous sibling of the node
      Specified by:
        `getPreviousSibling` in interface `org.w3c.dom.Node`
      Overrides:
        `getPreviousSibling` in class `AbstractNode`
      Returns:
        The previous sibling node. Returns null if the current node is the first child of its parent.

    - #### getNextSibling

          public org.w3c.dom.Node getNextSibling()

      Get next sibling node
      Specified by:
        `getNextSibling` in interface `org.w3c.dom.Node`
      Overrides:
        `getNextSibling` in class `AbstractNode`
      Returns:
        The next sibling node of the required type. Returns null if the current node is the last child of its parent.

    - #### getFirstChild

          public org.w3c.dom.Node getFirstChild()

      Get first child - default implementation used for leaf nodes
      Specified by:
        `getFirstChild` in interface `org.w3c.dom.Node`
      Overrides:
        `getFirstChild` in class `AbstractNode`
      Returns:
        null

    - #### getLastChild

          public org.w3c.dom.Node getLastChild()

      Get last child - default implementation used for leaf nodes
      Specified by:
        `getLastChild` in interface `org.w3c.dom.Node`
      Overrides:
        `getLastChild` in class `AbstractNode`
      Returns:
        null

    - #### getEnumeration

          public AxisEnumeration getEnumeration(byte axisNumber,
                                       NodeTest nodeTest)

      Return an enumeration over the nodes reached by the given axis from this node
      Specified by:
        `getEnumeration` in interface `NodeInfo`
      Specified by:
        `getEnumeration` in class `AbstractNode`
      Parameters:
        `node` - NodeInfo representing the node from which the enumeration starts
        `nodeType` - the type(s) of node to be included, e.g. NodeInfo.ELEMENT, NodeInfo.TEXT. The value NodeInfo.NODE means include any type of node.
        `nodeTest` - A pattern to be matched by the returned nodes
      Returns:
        an AxisEnumeration that scans the nodes reached by the axis in turn.

    - #### hasAttributes

          public boolean hasAttributes()

      Returns whether this node (if it is an element) has any attributes.
      Specified by:
        `hasAttributes` in interface `org.w3c.dom.Node`
      Specified by:
        `hasAttributes` in class `AbstractNode`
      Returns:
        `true` if this node has any attributes, `false` otherwise.
      Since:
        DOM Level 2

    - #### getAttributeValue

          public java.lang.String getAttributeValue(java.lang.String uri,
                                           java.lang.String localName)

      Find the value of a given attribute of this node.
      This method is defined on all nodes to meet XSL requirements, but for nodes other than elements it will always return null.
      Specified by:
        `getAttributeValue` in interface `NodeInfo`
      Specified by:
        `getAttributeValue` in class `AbstractNode`
      Parameters:
        `uri` - the namespace uri of an attribute
        `localName` - the local name of an attribute
      Returns:
        the value of the attribute, if it exists, otherwise null

    - #### getAttributeValue

          public java.lang.String getAttributeValue(int fingerprint)

      Get the value of a given attribute of this node
      Specified by:
        `getAttributeValue` in interface `NodeInfo`
      Specified by:
        `getAttributeValue` in class `AbstractNode`
      Parameters:
        `fingerprint` - The fingerprint of the attribute name
      Returns:
        the attribute value if it exists or null if not

    - #### getDocumentElement

          public org.w3c.dom.Element getDocumentElement()

      Get the outermost element.
      Overrides:
        `getDocumentElement` in class `AbstractNode`
      Returns:
        the Element node for the outermost element of the document. If the document is not well-formed, this returns the last element child of the root if there is one, otherwise null.

    - #### getDocumentRoot

          public DocumentInfo getDocumentRoot()

      Get the root (document) node
      Specified by:
        `getDocumentRoot` in interface `NodeInfo`
      Overrides:
        `getDocumentRoot` in class `AbstractNode`
      Returns:
        the DocumentInfo representing the containing document

    - #### getNextInDocument

          public NodeImpl getNextInDocument(NodeImpl anchor)

      Get the next node in document order
      Parameters:
        `anchor:` - the scan stops when it reaches a node that is not a descendant of the specified anchor node
      Returns:
        the next node in the document, or null if there is no such node

    - #### getPreviousInDocument

          public NodeImpl getPreviousInDocument()

      Get the previous node in document order
      Returns:
        the previous node in the document, or null if there is no such node

    - #### outputNamespaceNodes

          public void outputNamespaceNodes(Outputter out,
                                  boolean includeAncestors)
                                    throws javax.xml.transform.TransformerException

      Output all namespace nodes associated with this element. Does nothing if the node is not an element.
      Specified by:
        `outputNamespaceNodes` in interface `NodeInfo`
      Overrides:
        `outputNamespaceNodes` in class `AbstractNode`
      Parameters:
        `out` - The relevant outputter
        `includeAncestors` - True if namespaces declared on ancestor elements must be output; false if it is known that these are already on the result tree
      Throws:
        `javax.xml.transform.TransformerException`

    - #### removeNode

          public void removeNode()

      Remove this node from the tree. For system use only. When one or more nodes have been removed, renumberChildren() must be called to adjust the numbering of remaining nodes. PRECONDITION: The node must have a parent node.

    - #### getChildNodes

          public org.w3c.dom.NodeList getChildNodes()

      Return a `NodeList` that contains all children of this node. If there are no children, this is a `NodeList` containing no nodes.
      Specified by:
        `getChildNodes` in interface `org.w3c.dom.Node`
      Overrides:
        `getChildNodes` in class `AbstractNode`

    - #### getAttributes

          public org.w3c.dom.NamedNodeMap getAttributes()

      Return a `NamedNodeMap` containing the attributes of this node (if it is an `Element` ) or `null` otherwise. (DOM method)
      Specified by:
        `getAttributes` in interface `org.w3c.dom.Node`
      Overrides:
        `getAttributes` in class `AbstractNode`

    - #### hasChildNodes

          public boolean hasChildNodes()

      Determine whether the node has any children.
      Specified by:
        `hasChildNodes` in interface `NodeInfo`
      Specified by:
        `hasChildNodes` in interface `org.w3c.dom.Node`
      Specified by:
        `hasChildNodes` in class `AbstractNode`
      Returns:
        `true` if the node has any children, `false` if the node has no children.