org.apache.xpath.objects
Class XRTreeFragSelectWrapper

java.lang.Object
  |
  +--org.apache.xpath.Expression
        |
        +--org.apache.xpath.objects.XObject
              |
              +--org.apache.xpath.objects.XRTreeFrag
                    |
                    +--org.apache.xpath.objects.XRTreeFragSelectWrapper

public class XRTreeFragSelectWrapper

extends XRTreeFrag

implements java.lang.Cloneable

This class makes an select statement act like an result tree fragment.

See Also:

Serialized Form

Fields inherited from class org.apache.xpath.objects.XObject

CLASS_BOOLEAN, CLASS_NODESET, CLASS_NULL, CLASS_NUMBER, CLASS_RTREEFRAG, CLASS_STRING, CLASS_UNKNOWN, CLASS_UNRESOLVEDVARIABLE

Constructor Summary

XRTreeFragSelectWrapper(Expression expr)

Method Summary

DTMIterator	asNodeIterator() Cast result object to a DTMIterator.
void	detach() Detaches the DTMIterator from the set which it iterated over, releasing any computational resources and placing the iterator in the INVALID state.
XObject	execute(XPathContext xctxt) For support of literal objects in xpaths.
void	fixupVariables(java.util.Vector vars, int globalsSize) This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
int	getType() Tell what kind of class this is.
double	num() Cast result object to a number.
int	rtf() Cast result object to a result tree fragment.
java.lang.String	str() Cast result object to a string.
XMLString	xstr() Cast result object to an XMLString.

Methods inherited from class org.apache.xpath.objects.XRTreeFrag

allowDetachToRelease, appendToFsb, bool, convertToNodeset, equals, getTypeString, object

Methods inherited from class org.apache.xpath.objects.XObject

boolWithSideEffects, callVisitors, castToType, create, create, deepEquals, destruct, dispatchCharactersEvents, getFresh, greaterThan, greaterThanOrEqual, iter, lessThan, lessThanOrEqual, mutableNodeset, nodelist, nodeset, notEquals, numWithSideEffects, reset, rtf, rtree, rtree, toString

Methods inherited from class org.apache.xpath.Expression

asIterator, asIteratorRaw, asNode, assertion, bool, canTraverseOutsideSubtree, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isStableNumber, num, warn, xstr

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

XRTreeFragSelectWrapper

public XRTreeFragSelectWrapper(Expression expr)

Method Detail

fixupVariables

public void fixupVariables(java.util.Vector vars,
                           int globalsSize)

This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.

Parameters:

vars - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame).

Overrides:

fixupVariables in class XObject

execute

public XObject execute(XPathContext xctxt)
                throws TransformerException

For support of literal objects in xpaths.

Parameters:

xctxt - The XPath execution context.

Returns:

the result of executing the select expression

Throws:

TransformerException -

Overrides:

execute in class XObject

detach

public void detach()

Detaches the DTMIterator from the set which it iterated over, releasing any computational resources and placing the iterator in the INVALID state. After detach has been invoked, calls to nextNode or previousNode will raise a runtime exception. In general, detach should only be called once on the object.

Overrides:

detach in class XRTreeFrag

num

public double num()
           throws TransformerException

Cast result object to a number.

Returns:

The result tree fragment as a number or NaN

Overrides:

num in class XRTreeFrag

xstr

public XMLString xstr()

Cast result object to an XMLString.

Returns:

The document fragment node data or the empty string.

Overrides:

xstr in class XRTreeFrag

str

public java.lang.String str()

Cast result object to a string.

Returns:

The document fragment node data or the empty string.

Overrides:

str in class XRTreeFrag

getType

public int getType()

Tell what kind of class this is.

Returns:

the string type

Overrides:

getType in class XRTreeFrag

rtf

public int rtf()

Cast result object to a result tree fragment.

Returns:

The document fragment this wraps

Overrides:

rtf in class XRTreeFrag

asNodeIterator

public DTMIterator asNodeIterator()

Cast result object to a DTMIterator.

Returns:

The document fragment as a DTMIterator

Overrides:

asNodeIterator in class XRTreeFrag