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: Class FragmentValue
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com.icl.saxon.expr
Class FragmentValue


java.lang.Object

  |

  +--com.icl.saxon.expr.Expression

        |

        +--com.icl.saxon.expr.Value

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              +--com.icl.saxon.expr.NodeSetValue

                    |

                    +--com.icl.saxon.expr.SingletonNodeSet

                          |

                          +--com.icl.saxon.expr.FragmentValue
All Implemented Interfaces:
org.w3c.dom.NodeList
public final class FragmentValue
extends SingletonNodeSet

This class represents a Value of type result tree fragment.
A Result Tree Fragment can be created by defining a variable in XSL whose value is defined by the contents of the xsl:variable element, possibly including start and end element tags.

Fields inherited from class com.icl.saxon.expr.SingletonNodeSet
generalUseAllowed, node
 
Fields inherited from class com.icl.saxon.expr.Value
ANY, BOOLEAN, NODESET, NUMBER, OBJECT, STRING
 
Fields inherited from class com.icl.saxon.expr.Expression
staticContext
 
Constructor Summary
FragmentValue(Controller c)
           
 
Method Summary
 boolean asBoolean()
          Convert the result tree fragment to a boolean
 double asNumber()
          Convert the result tree fragment to a number
 java.lang.String asString()
          Convert the result tree fragment to a string.
 boolean compare(int operator, Value other)
          Test how a FragmentValue compares to another Value under a relational comparison.
 void copy(Outputter out)
          Copy the result tree fragment value to a given Outputter
 void display(int level)
          Diagnostic print of expression structure
 NodeEnumeration enumerate()
          Return an enumeration of this nodeset value.
 boolean equals(Value other)
          Test whether a nodeset "equals" another Value
 int getCount()
          Count the nodes in the node-set.
 int getDataType()
          Determine the data type of the expression, if possible
 Emitter getEmitter()
          Get an Emitter that can be used to feed data to this result tree fragment
 NodeInfo getFirst()
          Get the first node in the nodeset (in document order)
 DocumentInfo getRootNode()
          Get the root (document) node
 int getType()
          Return the type of the value
 boolean notEquals(Value other)
          Test whether a nodeset "not-equals" another Value
 void outputStringValue(Outputter out, Context context)
          Evaluate an expression as a String and write the result to the specified outputter.
 void replay(Emitter emitter)
          Replay the saved emitter events to a new emitter
 void setBaseURI(java.lang.String uri)
          Set the Base URI for the nodes in the result tree fragment.
 Expression simplify()
          Simplify the expression
 
Methods inherited from class com.icl.saxon.expr.SingletonNodeSet
allowGeneralUse, evaluate, evaluateAsNodeSet, getLength, isGeneralUseAllowed, isSorted, item, setSorted, sort
 
Methods inherited from class com.icl.saxon.expr.NodeSetValue
conversionPreference, convertToJava, enumerate
 
Methods inherited from class com.icl.saxon.expr.Value
getDependencies, inverse, numericCompare, reduce, stringToNumber
 
Methods inherited from class com.icl.saxon.expr.Expression
containsReferences, evaluateAsBoolean, evaluateAsNumber, evaluateAsString, getStaticContext, indent, isContextDocumentNodeSet, make, setStaticContext, usesCurrent
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FragmentValue


public FragmentValue(Controller c)
Method Detail

setBaseURI


public void setBaseURI(java.lang.String uri)
Set the Base URI for the nodes in the result tree fragment. This is defined to be the Base URI of the relevant xsl:variable element in the stylesheet.

getEmitter


public Emitter getEmitter()
Get an Emitter that can be used to feed data to this result tree fragment

asString


public java.lang.String asString()
Convert the result tree fragment to a string.
Overrides:
asString in class SingletonNodeSet
Following copied from class: com.icl.saxon.expr.SingletonNodeSet
Returns:
the value of the first node in the node-set if there is one, otherwise an empty string

outputStringValue


public void outputStringValue(Outputter out,
                              Context context)





Evaluate an expression as a String and write the result to the 
 specified outputter.



Overrides:
outputStringValue in class Expression









Parameters:
out - The required outputter
context - The context in which the expression is to be evaluated
















asNumber




public double asNumber()






Convert the result tree fragment to a number



Overrides:
asNumber in class NodeSetValue






Following copied from class: com.icl.saxon.expr.NodeSetValue






Returns:
the number obtained by evaluating as a String and converting the string to a number
















asBoolean




public boolean asBoolean()






Convert the result tree fragment to a boolean



Overrides:
asBoolean in class SingletonNodeSet






Following copied from class: com.icl.saxon.expr.SingletonNodeSet






Returns:
true if the node set is not empty
















getCount




public int getCount()






Count the nodes in the node-set.



Overrides:
getCount in class SingletonNodeSet
















simplify




public Expression simplify()






Simplify the expression



Overrides:
simplify in class SingletonNodeSet






Following copied from class: com.icl.saxon.expr.Value






Returns:
the simplified expression
















getFirst




public NodeInfo getFirst()






Get the first node in the nodeset (in document order)



Overrides:
getFirst in class SingletonNodeSet









Returns:
the first node
















enumerate




public NodeEnumeration enumerate()






Return an enumeration of this nodeset value.



Overrides:
enumerate in class SingletonNodeSet
















equals




public boolean equals(Value other)
               throws XPathException






Test whether a nodeset "equals" another Value



Overrides:
equals in class SingletonNodeSet






Following copied from class: com.icl.saxon.expr.Value






Returns:
a boolean giving the value of the expression, evaluated in the current context
















notEquals




public boolean notEquals(Value other)
                  throws XPathException






Test whether a nodeset "not-equals" another Value



Overrides:
notEquals in class SingletonNodeSet






Following copied from class: com.icl.saxon.expr.Value






Returns:
a boolean giving the value of the expression, evaluated in the current context
















compare




public boolean compare(int operator,
                       Value other)
                throws XPathException






Test how a FragmentValue compares to another Value under a relational comparison.



Overrides:
compare in class NodeSetValue






Following copied from class: com.icl.saxon.expr.NodeSetValue






Parameters:
operator - The comparison operator, one of Tokenizer.LE, Tokenizer.LT,
 Tokenizer.GE, Tokenizer.GT,
















getType




public int getType()






Return the type of the value



Returns:
Value.NODESET (always)
















getDataType




public int getDataType()






Determine the data type of the expression, if possible



Overrides:
getDataType in class NodeSetValue









Returns:
Value.NODESET
















getRootNode




public DocumentInfo getRootNode()






Get the root (document) node










copy




public void copy(Outputter out)





Copy the result tree fragment value to a given Outputter










replay




public void replay(Emitter emitter)





Replay the saved emitter events to a new emitter










display




public void display(int level)






Diagnostic print of expression structure



Overrides:
display in class NodeSetValue






























  


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