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## org.apache.xalan.templates
Class ElemTemplateElement

    java.lang.Object
      |
      +--org.apache.xml.utils.UnImplNode
            |
            +--org.apache.xalan.templates.ElemTemplateElement

Direct Known Subclasses:
  DecimalFormatProperties, ElemApplyImport, ElemChoose, ElemComment, ElemCopyOf, ElemEmpty, ElemExtensionDecl, ElemExtensionScript, ElemFallback, ElemForEach, ElemIf, ElemMessage, ElemNumber, ElemOtherwise, ElemPI, ElemSort, ElemTemplate, ElemText, ElemTextLiteral, ElemUse, ElemValueOf, ElemVariable, ElemWhen, ElemWithParam, KeyDeclaration, NamespaceAlias, OutputProperties, Stylesheet, XSLTElementProcessor

public class ElemTemplateElement
extends UnImplNode
implements PrefixResolver, java.io.Serializable, ExpressionNode, WhitespaceStrippingElementMatcher, XSLTVisitable

An instance of this class represents an element inside an xsl:template class. It has a single "execute" method which is expected to perform the given action on the result tree. This class acts like a Element node, and implements the Element interface, but is not a full implementation of that interface... it only implements enough for basic traversal of the tree.

See Also:
  `Stylesheet`, Serialized Form
Usage:
  **For advanced use only**

Constructor Summary
`ElemTemplateElement()` Construct a template element instance.

Method Summary
`ElemTemplateElement` | `appendChild(ElemTemplateElement elem)` Add a child to the child list.
`Node` | `appendChild(Node newChild)` Add a child to the child list.
`void` | `callVisitors(XSLTVisitor visitor)`
`boolean` | `canAcceptVariables()` Tell if this element can accept variable declarations.
`boolean` | `canStripWhiteSpace()` Get information about whether or not whitespace can be stripped.
`int` | `compareTo(java.lang.Object o)` Compares this object with the specified object for precedence order.
`void` | `compose(StylesheetRoot sroot)` This function is called after everything else has been recomposed, and allows the template to set remaining values that may be based on some other property that depends on recomposition.
`boolean` | `containsExcludeResultPrefix(java.lang.String prefix, java.lang.String uri)` Get whether or not the passed URL is contained flagged by the "extension-element-prefixes" property.
`void` | `endCompose(StylesheetRoot sroot)` This after the template's children have been composed.
`void` | `error(java.lang.String msg)`
`void` | `error(java.lang.String msg, java.lang.Object[] args)` Throw a template element runtime error.
`void` | `execute(TransformerImpl transformer)` Execute the element's primary function.
`void` | `exprAddChild(ExpressionNode n, int i)` This method tells the node to add its argument to the node's list of children.
`ExpressionNode` | `exprGetChild(int i)` This method returns a child node.
`int` | `exprGetNumChildren()` Return the number of children the node has.
`ExpressionNode` | `exprGetParent()` Get the ExpressionNode parent of this node.
`void` | `exprSetParent(ExpressionNode n)` Set the parent of this node.
`java.lang.String` | `getBaseIdentifier()` Return the base identifier.
`NodeList` | `getChildNodes()` Return the nodelist (same reference).
`int` | `getColumnNumber()` Return the column number where the current document event ends.
`java.util.List` | `getDeclaredPrefixes()` Return a table that contains all prefixes available within this element context.
`Node` | `getDOMBackPointer()` If this stylesheet was created from a DOM, get the DOM backpointer that this element originated from.
`int` | `getEndColumnNumber()` Return the column number where the current document event ends.
`int` | `getEndLineNumber()` Return the line number where the current document event ends.
`Node` | `getFirstChild()` Get the first child as a Node.
`ElemTemplateElement` | `getFirstChildElem()` Get the first child as a ElemTemplateElement.
`Node` | `getLastChild()` Get the last child.
`ElemTemplateElement` | `getLastChildElem()` Get the last child.
`int` | `getLength()` NodeList method: Count the immediate children of this node
`int` | `getLineNumber()` Return the line number where the current document event ends.
`java.lang.String` | `getLocalName()` For now, just return the result of getNodeName(), which the local name.
`java.lang.String` | `getNamespaceForPrefix(java.lang.String prefix)` Given a namespace, get the corrisponding prefix.
`java.lang.String` | `getNamespaceForPrefix(java.lang.String prefix, Node context)` Fullfill the PrefixResolver interface.
`Node` | `getNextSibling()` Get the next sibling (as a Node) or return null.
`ElemTemplateElement` | `getNextSiblingElem()` Get the next sibling (as a ElemTemplateElement) or return null.
`java.lang.String` | `getNodeName()` Return the node name.
`short` | `getNodeType()` Get the type of the node.
`Document` | `getOwnerDocument()` Get the stylesheet owner.
`ElemTemplate` | `getOwnerXSLTemplate()` Get the owning xsl:template element.
`ElemTemplateElement` | `getParentElem()` Get the parent as an ElemTemplateElement.
`Node` | `getParentNode()` Get the parent as a Node.
`ElemTemplateElement` | `getParentNodeElem()` Get the parent element.
`Node` | `getPreviousSibling()` Get the previous sibling (as a Node) or return null.
`ElemTemplateElement` | `getPreviousSiblingElem()` Get the previous sibling (as a Node) or return null.
`java.lang.String` | `getPublicId()` Return the public identifier for the current document event.
`Stylesheet` | `getStylesheet()` Get the owning stylesheet.
`StylesheetComposed` | `getStylesheetComposed()` Get the owning "composed" stylesheet.
`StylesheetRoot` | `getStylesheetRoot()` Get the owning root stylesheet.
`java.lang.String` | `getSystemId()` Return the system identifier for the current document event.
`java.lang.String` | `getTagName()` Return the element name.
`int` | `getUid()` Get the UID (document order index).
`boolean` | `getXmlSpace()` Get the "xml:space" attribute.
`int` | `getXSLToken()` Get an integer representation of the element type.
`boolean` | `handlesNullPrefixes()`
`boolean` | `hasChildNodes()` Tell if there are child nodes.
`boolean` | `hasTextLitOnly()` Tell if this element only has one text child, for optimization purposes.
`boolean` | `hasVariableDecl()`
`Node` | `insertBefore(Node newChild, Node refChild)` Unimplemented.
`boolean` | `isCompiledTemplate()` Tell if this template is a compiled template.
`Node` | `item(int index)` NodeList method: Return the Nth immediate child of this node, or null if the index is out of bounds.
`void` | `recompose(StylesheetRoot root)` This function is called during recomposition to control how this element is composed.
`ElemTemplateElement` | `removeChild(ElemTemplateElement childETE)` Remove a child.
`ElemTemplateElement` | `replaceChild(ElemTemplateElement newChildElem, ElemTemplateElement oldChildElem)` Replace the old child with a new child.
`Node` | `replaceChild(Node newChild, Node oldChild)` Replace the old child with a new child.
`void` | `resolvePrefixTables()` Combine the parent's namespaces with this namespace for fast processing, taking care to reference the parent's namespace if this namespace adds nothing new.
`void` | `runtimeInit(TransformerImpl transformer)` This function will be called on top-level elements only, just before the transform begins.
`void` | `setDOMBackPointer(Node n)` If this stylesheet was created from a DOM, set the DOM backpointer that this element originated from.
`void` | `setEndLocaterInfo(SourceLocator locator)` Set the end location information for this element.
`void` | `setLocaterInfo(SourceLocator locator)` Set the location information for this element.
`void` | `setParentElem(ElemTemplateElement p)` Set the parent as an ElemTemplateElement.
`void` | `setPrefixes(NamespaceSupport nsSupport)` From the SAX2 helper class, set the namespace table for this element.
`void` | `setPrefixes(NamespaceSupport nsSupport, boolean excludeXSLDecl)` Copy the namespace declarations from the NamespaceSupport object.
`void` | `setUid(int i)` Set the UID (document order index).
`void` | `setXmlSpace(int v)` Set the "xml:space" attribute.
`boolean` | `shouldStripWhiteSpace(XPathContext support, Element targetElement)` Get information about whether or not an element should strip whitespace.

Methods inherited from class org.apache.xml.utils.UnImplNode
`adoptNode, appendData, cloneNode, compareDocumentPosition, createAttribute, createAttributeNS, createCDATASection, createComment, createDocumentFragment, createElement, createElementNS, createEntityReference, createProcessingInstruction, createTextNode, deleteData, getActualEncoding, getAttribute, getAttributeNode, getAttributeNodeNS, getAttributeNS, getAttributes, getBaseURI, getDoctype, getDocumentElement, getDocumentURI, getDomConfig, getElementById, getElementsByTagName, getElementsByTagNameNS, getFeature, getImplementation, getInputEncoding, getNamespaceURI, getNodeValue, getOwnerElement, getPrefix, getSchemaTypeInfo, getSpecified, getStrictErrorChecking, getTextContent, getUserData, getWholeText, getXmlEncoding, getXmlStandalone, getXmlVersion, hasAttribute, hasAttributeNS, hasAttributes, importNode, insertData, isDefaultNamespace, isEqualNode, isId, isSameNode, isSupported, isWhitespaceInElementContent, lookupNamespaceURI, lookupPrefix, normalize, normalizeDocument, removeAttribute, removeAttributeNode, removeAttributeNS, removeChild, renameNode, replaceData, replaceWholeText, setActualEncoding, setAttribute, setAttributeNode, setAttributeNodeNS, setAttributeNS, setData, setDocumentURI, setIdAttribute, setIdAttribute, setIdAttributeNode, setIdAttributeNS, setInputEncoding, setNodeValue, setPrefix, setStrictErrorChecking, setTextContent, setUserData, setValue, setXmlEncoding, setXmlStandalone, setXmlVersion, splitText, substringData`

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

Constructor Detail

### ElemTemplateElement

    public ElemTemplateElement()

  Construct a template element instance.

Method Detail

### isCompiledTemplate

    public boolean isCompiledTemplate()

  Tell if this template is a compiled template.
  Returns:
    Boolean flag indicating whether this is a compiled template

### getXSLToken

    public int getXSLToken()

  Get an integer representation of the element type.
  Returns:
    An integer representation of the element, defined in the Constants class.
  See Also:
    `Constants`

### getNodeName

    public java.lang.String getNodeName()

  Return the node name.
  Returns:
    An invalid node name
  Overrides:
    getNodeName in class UnImplNode

### getLocalName

    public java.lang.String getLocalName()

  For now, just return the result of getNodeName(), which the local name.
  Returns:
    The result of getNodeName().
  Overrides:
    getLocalName in class UnImplNode

### runtimeInit

    public void runtimeInit(TransformerImpl transformer)
                     throws TransformerException

  This function will be called on top-level elements only, just before the transform begins.
  Parameters:
    `transformer` - The XSLT TransformerFactory.
  Throws:
    TransformerException -

### execute

    public void execute(TransformerImpl transformer)
                 throws TransformerException

  Execute the element's primary function. Subclasses of this function may recursivly execute down the element tree.
  Parameters:
    `transformer` - The XSLT TransformerFactory.
  Throws:
    TransformerException - if any checked exception occurs.

### getStylesheetComposed

    public StylesheetComposed getStylesheetComposed()

  Get the owning "composed" stylesheet. This looks up the inheritance chain until it calls getStylesheetComposed on a Stylesheet object, which will Get the owning aggregated stylesheet, or that stylesheet if it is aggregated.
  Returns:
    the owning "composed" stylesheet.

### getStylesheet

    public Stylesheet getStylesheet()

  Get the owning stylesheet. This looks up the inheritance chain until it calls getStylesheet on a Stylesheet object, which will return itself.
  Returns:
    the owning stylesheet

### getStylesheetRoot

    public StylesheetRoot getStylesheetRoot()

  Get the owning root stylesheet. This looks up the inheritance chain until it calls StylesheetRoot on a Stylesheet object, which will return a reference to the root stylesheet.
  Returns:
    the owning root stylesheet

### recompose

    public void recompose(StylesheetRoot root)
                   throws TransformerException

  This function is called during recomposition to control how this element is composed.

### compose

    public void compose(StylesheetRoot sroot)
                 throws TransformerException

  This function is called after everything else has been recomposed, and allows the template to set remaining values that may be based on some other property that depends on recomposition.

### endCompose

    public void endCompose(StylesheetRoot sroot)
                    throws TransformerException

  This after the template's children have been composed.

### error

    public void error(java.lang.String msg,
                      java.lang.Object[] args)

  Throw a template element runtime error. (Note: should we throw a TransformerException instead?)
  Parameters:
    `msg` - key of the error that occured.
    `args` - Arguments to be used in the message
  Overrides:
    error in class UnImplNode

### error

    public void error(java.lang.String msg)

  Overrides:
    error in class UnImplNode

### appendChild

    public Node appendChild(Node newChild)
                     throws DOMException

  Add a child to the child list. NOTE: This presumes the child did not previously have a parent. Making that assumption makes this a less expensive operation -- but requires that if you *do* want to reparent a node, you use removeChild() first to remove it from its previous context. Failing to do so will damage the tree.
  Parameters:
    `newChild` - Child to be added to child list
  Returns:
    Child just added to the child list
  Throws:
    DOMException -
  Overrides:
    appendChild in class UnImplNode

### appendChild

    public ElemTemplateElement appendChild(ElemTemplateElement elem)

  Add a child to the child list. NOTE: This presumes the child did not previously have a parent. Making that assumption makes this a less expensive operation -- but requires that if you *do* want to reparent a node, you use removeChild() first to remove it from its previous context. Failing to do so will damage the tree.
  Parameters:
    `elem` - Child to be added to child list
  Returns:
    Child just added to the child list

### hasChildNodes

    public boolean hasChildNodes()

  Tell if there are child nodes.
  Returns:
    True if there are child nodes
  Overrides:
    hasChildNodes in class UnImplNode

### getNodeType

    public short getNodeType()

  Get the type of the node.
  Returns:
    Constant for this node type
  Overrides:
    getNodeType in class UnImplNode

### getChildNodes

    public NodeList getChildNodes()

  Return the nodelist (same reference).
  Returns:
    The nodelist containing the child nodes (this)
  Overrides:
    getChildNodes in class UnImplNode

### removeChild

    public ElemTemplateElement removeChild(ElemTemplateElement childETE)

  Remove a child. ADDED 9/8/200 to support compilation. TODO: ***** Alternative is "removeMe() from my parent if any" ... which is less well checked, but more convenient in some cases. Given that we assume only experts are calling this class, it might be preferable. It's less DOMish, though.
  Parameters:
    `childETE` - The child to remove. This operation is a no-op if oldChild is not a child of this node.
  Returns:
    the removed child, or null if the specified node was not a child of this element.

### replaceChild

    public Node replaceChild(Node newChild,
                             Node oldChild)
                      throws DOMException

  Replace the old child with a new child.
  Parameters:
    `newChild` - New child to replace with
    `oldChild` - Old child to be replaced
  Returns:
    The new child
  Throws:
    DOMException -
  Overrides:
    replaceChild in class UnImplNode

### insertBefore

    public Node insertBefore(Node newChild,
                             Node refChild)
                      throws DOMException

  Unimplemented. See org.w3c.dom.Node
  Parameters:
    `newChild` - New child node to insert
    `refChild` - Insert in front of this child
  Returns:
    null
  Throws:
    DOMException -
  Overrides:
    insertBefore in class UnImplNode

### replaceChild

    public ElemTemplateElement replaceChild(ElemTemplateElement newChildElem,
                                            ElemTemplateElement oldChildElem)

  Replace the old child with a new child.
  Parameters:
    `newChildElem` - New child to replace with
    `oldChildElem` - Old child to be replaced
  Returns:
    The new child
  Throws:
    DOMException -

### getLength

    public int getLength()

  NodeList method: Count the immediate children of this node
  Returns:
    The count of children of this node
  Overrides:
    getLength in class UnImplNode

### item

    public Node item(int index)

  NodeList method: Return the Nth immediate child of this node, or null if the index is out of bounds.
  Parameters:
    `index` - Index of child to find
  Returns:
    org.w3c.dom.Node: the child node at given index
  Overrides:
    item in class UnImplNode

### getOwnerDocument

    public Document getOwnerDocument()

  Get the stylesheet owner.
  Returns:
    The stylesheet owner
  Overrides:
    getOwnerDocument in class UnImplNode

### getOwnerXSLTemplate

    public ElemTemplate getOwnerXSLTemplate()

  Get the owning xsl:template element.
  Returns:
    The owning xsl:template element, this element if it is a xsl:template, or null if not found.

### getTagName

    public java.lang.String getTagName()

  Return the element name.
  Returns:
    The element name
  Overrides:
    getTagName in class UnImplNode

### hasTextLitOnly

    public boolean hasTextLitOnly()

  Tell if this element only has one text child, for optimization purposes.
  Returns:
    true of this element only has one text literal child.

### getBaseIdentifier

    public java.lang.String getBaseIdentifier()

  Return the base identifier.
  Specified by:
    getBaseIdentifier in interface PrefixResolver
  Returns:
    The base identifier

### getEndLineNumber

    public int getEndLineNumber()

  Return the line number where the current document event ends. Note that this is the line position of the first character after the text associated with the document event.
  Returns:
    The line number, or -1 if none is available.
  See Also:
    `getColumnNumber()`

### getLineNumber

    public int getLineNumber()

  Return the line number where the current document event ends. Note that this is the line position of the first character after the text associated with the document event.
  Returns:
    The line number, or -1 if none is available.
  See Also:
    `getColumnNumber()`

### getEndColumnNumber

    public int getEndColumnNumber()

  Return the column number where the current document event ends. Note that this is the column number of the first character after the text associated with the document event. The first column in a line is position 1.
  Returns:
    The column number, or -1 if none is available.
  See Also:
    `getLineNumber()`

### getColumnNumber

    public int getColumnNumber()

  Return the column number where the current document event ends. Note that this is the column number of the first character after the text associated with the document event. The first column in a line is position 1.
  Returns:
    The column number, or -1 if none is available.
  See Also:
    `getLineNumber()`

### getPublicId

    public java.lang.String getPublicId()

  Return the public identifier for the current document event.

  This will be the public identifier

  Returns:
    A string containing the public identifier, or null if none is available.
  See Also:
    `getSystemId()`

### getSystemId

    public java.lang.String getSystemId()

  Return the system identifier for the current document event.

  If the system identifier is a URL, the parser must resolve it fully before passing it to the application.

  Returns:
    A string containing the system identifier, or null if none is available.
  See Also:
    `getPublicId()`

### setLocaterInfo

    public void setLocaterInfo(SourceLocator locator)

  Set the location information for this element.
  Parameters:
    `locator` - Source Locator with location information for this element

### setEndLocaterInfo

    public void setEndLocaterInfo(SourceLocator locator)

  Set the end location information for this element.
  Parameters:
    `locator` - Source Locator with location information for this element

### hasVariableDecl

    public boolean hasVariableDecl()

### setXmlSpace

    public void setXmlSpace(int v)

  Set the "xml:space" attribute. A text node is preserved if an ancestor element of the text node has an xml:space attribute with a value of preserve, and no closer ancestor element has xml:space with a value of default.
  Parameters:
    `v` - Enumerated value, either Constants.ATTRVAL_PRESERVE or Constants.ATTRVAL_STRIP.
  See Also:
    strip in XSLT Specification, section-Creating-Text in XSLT Specification

### getXmlSpace

    public boolean getXmlSpace()

  Get the "xml:space" attribute. A text node is preserved if an ancestor element of the text node has an xml:space attribute with a value of preserve, and no closer ancestor element has xml:space with a value of default.
  Returns:
    The value of the xml:space attribute
  See Also:
    strip in XSLT Specification, section-Creating-Text in XSLT Specification

### getDeclaredPrefixes

    public java.util.List getDeclaredPrefixes()

  Return a table that contains all prefixes available within this element context.
  Returns:
    Vector containing the prefixes available within this element context

### setPrefixes

    public void setPrefixes(NamespaceSupport nsSupport)
                     throws TransformerException

  From the SAX2 helper class, set the namespace table for this element. Take care to call resolveInheritedNamespaceDecls. after all namespace declarations have been added.
  Parameters:
    `nsSupport` - non-null reference to NamespaceSupport from the ContentHandler.
  Throws:
    TransformerException -

### setPrefixes

    public void setPrefixes(NamespaceSupport nsSupport,
                            boolean excludeXSLDecl)
                     throws TransformerException

  Copy the namespace declarations from the NamespaceSupport object. Take care to call resolveInheritedNamespaceDecls. after all namespace declarations have been added.
  Parameters:
    `nsSupport` - non-null reference to NamespaceSupport from the ContentHandler.
    `excludeXSLDecl` - true if XSLT namespaces should be ignored.
  Throws:
    TransformerException -

### getNamespaceForPrefix

    public java.lang.String getNamespaceForPrefix(java.lang.String prefix,
                                                  Node context)

  Fullfill the PrefixResolver interface. Calling this for this class will throw an error.
  Specified by:
    getNamespaceForPrefix in interface PrefixResolver
  Parameters:
    `prefix` - The prefix to look up, which may be an empty string ("") for the default Namespace.
    `context` - The node context from which to look up the URI.
  Returns:
    null if the error listener does not choose to throw an exception.

### getNamespaceForPrefix

    public java.lang.String getNamespaceForPrefix(java.lang.String prefix)

  Given a namespace, get the corrisponding prefix. 9/15/00: This had been iteratively examining the m_declaredPrefixes field for this node and its parents. That makes life difficult for the compilation experiment, which doesn't have a static vector of local declarations. Replaced a recursive solution, which permits easier subclassing/overriding.
  Specified by:
    getNamespaceForPrefix in interface PrefixResolver
  Parameters:
    `prefix` - non-null reference to prefix string, which should map to a namespace URL.
  Returns:
    The namespace URL that the prefix maps to, or null if no mapping can be found.

### containsExcludeResultPrefix

    public boolean containsExcludeResultPrefix(java.lang.String prefix,
                                               java.lang.String uri)

  Get whether or not the passed URL is contained flagged by the "extension-element-prefixes" property. This method is overridden by `ElemLiteralResult.containsExcludeResultPrefix(java.lang.String, java.lang.String)`.
  Parameters:
    `prefix` - non-null reference to prefix that might be excluded.
  Returns:
    true if the prefix should normally be excluded.
  See Also:
    extension-element in XSLT Specification

### resolvePrefixTables

    public void resolvePrefixTables()
                             throws TransformerException

  Combine the parent's namespaces with this namespace for fast processing, taking care to reference the parent's namespace if this namespace adds nothing new. (Recursive method, walking the elements depth-first, processing parents before children). Note that this method builds m_prefixTable with aliased namespaces, *not* the original namespaces.
  Throws:
    TransformerException -

### setUid

    public void setUid(int i)

  Set the UID (document order index).
  Parameters:
    `i` - Index of this child.

### getUid

    public int getUid()

  Get the UID (document order index).
  Returns:
    Index of this child

### getParentNode

    public Node getParentNode()

  Get the parent as a Node.
  Returns:
    This node's parent node
  Overrides:
    getParentNode in class UnImplNode

### getParentElem

    public ElemTemplateElement getParentElem()

  Get the parent as an ElemTemplateElement.
  Returns:
    This node's parent as an ElemTemplateElement

### setParentElem

    public void setParentElem(ElemTemplateElement p)

  Set the parent as an ElemTemplateElement.
  Parameters:
    `p` - This node's parent as an ElemTemplateElement

### getNextSibling

    public Node getNextSibling()

  Get the next sibling (as a Node) or return null.
  Returns:
    this node's next sibling or null
  Overrides:
    getNextSibling in class UnImplNode

### getPreviousSibling

    public Node getPreviousSibling()

  Get the previous sibling (as a Node) or return null. Note that this may be expensive if the parent has many kids; we accept that price in exchange for avoiding the prev pointer TODO: If we were sure parents and sibs are always ElemTemplateElements, we could hit the fields directly rather than thru accessors.
  Returns:
    This node's previous sibling or null
  Overrides:
    getPreviousSibling in class UnImplNode

### getPreviousSiblingElem

    public ElemTemplateElement getPreviousSiblingElem()

  Get the previous sibling (as a Node) or return null. Note that this may be expensive if the parent has many kids; we accept that price in exchange for avoiding the prev pointer TODO: If we were sure parents and sibs are always ElemTemplateElements, we could hit the fields directly rather than thru accessors.
  Returns:
    This node's previous sibling or null

### getNextSiblingElem

    public ElemTemplateElement getNextSiblingElem()

  Get the next sibling (as a ElemTemplateElement) or return null.
  Returns:
    This node's next sibling (as a ElemTemplateElement) or null

### getParentNodeElem

    public ElemTemplateElement getParentNodeElem()

  Get the parent element.
  Returns:
    This node's next parent (as a ElemTemplateElement) or null

### getFirstChild

    public Node getFirstChild()

  Get the first child as a Node.
  Returns:
    This node's first child or null
  Overrides:
    getFirstChild in class UnImplNode

### getFirstChildElem

    public ElemTemplateElement getFirstChildElem()

  Get the first child as a ElemTemplateElement.
  Returns:
    This node's first child (as a ElemTemplateElement) or null

### getLastChild

    public Node getLastChild()

  Get the last child.
  Returns:
    This node's last child
  Overrides:
    getLastChild in class UnImplNode

### getLastChildElem

    public ElemTemplateElement getLastChildElem()

  Get the last child.
  Returns:
    This node's last child

### getDOMBackPointer

    public Node getDOMBackPointer()

  If this stylesheet was created from a DOM, get the DOM backpointer that this element originated from. For tooling use.
  Returns:
    DOM backpointer that this element originated from or null.

### setDOMBackPointer

    public void setDOMBackPointer(Node n)

  If this stylesheet was created from a DOM, set the DOM backpointer that this element originated from. For tooling use.
  Parameters:
    `n` - DOM backpointer that this element originated from.

### compareTo

    public int compareTo(java.lang.Object o)
                  throws java.lang.ClassCastException

  Compares this object with the specified object for precedence order. The order is determined by the getImportCountComposed() of the containing composed stylesheet and the getUid() of this element. Returns a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.
  Parameters:
    `o` - The object to be compared to this object
  Returns:
    a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.
  Throws:
    java.lang.ClassCastException - if the specified object's type prevents it from being compared to this Object.

### shouldStripWhiteSpace

    public boolean shouldStripWhiteSpace(XPathContext support,
                                         Element targetElement)
                                  throws TransformerException

  Get information about whether or not an element should strip whitespace.
  Specified by:
    shouldStripWhiteSpace in interface WhitespaceStrippingElementMatcher
  Parameters:
    `support` - The XPath runtime state.
    `targetElement` - Element to check
  Returns:
    true if the whitespace should be stripped.
  Throws:
    TransformerException -
  See Also:
    strip in XSLT Specification

### canStripWhiteSpace

    public boolean canStripWhiteSpace()

  Get information about whether or not whitespace can be stripped.
  Specified by:
    canStripWhiteSpace in interface WhitespaceStrippingElementMatcher
  Returns:
    true if the whitespace can be stripped.
  See Also:
    strip in XSLT Specification

### canAcceptVariables

    public boolean canAcceptVariables()

  Tell if this element can accept variable declarations.
  Returns:
    true if the element can accept and process variable declarations.

### exprSetParent

    public void exprSetParent(ExpressionNode n)

  Set the parent of this node.
  Specified by:
    exprSetParent in interface ExpressionNode
  Parameters:
    `n` - Must be a ElemTemplateElement.

### exprGetParent

    public ExpressionNode exprGetParent()

  Get the ExpressionNode parent of this node.
  Specified by:
    exprGetParent in interface ExpressionNode

### exprAddChild

    public void exprAddChild(ExpressionNode n,
                             int i)

  This method tells the node to add its argument to the node's list of children.
  Specified by:
    exprAddChild in interface ExpressionNode
  Parameters:
    `n` - Must be a ElemTemplateElement.

### exprGetChild

    public ExpressionNode exprGetChild(int i)

  This method returns a child node. The children are numbered from zero, left to right.
  Specified by:
    exprGetChild in interface ExpressionNode

### exprGetNumChildren

    public int exprGetNumChildren()

  Return the number of children the node has.
  Specified by:
    exprGetNumChildren in interface ExpressionNode

### callVisitors

    public void callVisitors(XSLTVisitor visitor)

  Specified by:
    callVisitors in interface XSLTVisitable
  See Also:
    `XSLTVisitable.callVisitors(XSLTVisitor)`

### handlesNullPrefixes

    public boolean handlesNullPrefixes()

  Specified by:
    handlesNullPrefixes in interface PrefixResolver
  See Also:
    `PrefixResolver.handlesNullPrefixes()`

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