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com.icl.saxon.functions

Class Id

public class Id
extends Function

Field Summary

Fields inherited from class com.icl.saxon.expr.Function

argument

Fields inherited from class com.icl.saxon.expr.Expression

staticContext

Method Summary

Value
evaluate(Context context)
Evaluate in a general context
NodeSetValue
evaluateAsNodeSet(Context context)
Evaluate in a context where a node-set is required
int
getDataType()
Determine the data type of the expression
int
getDependencies()
Determine which aspects of the context the expression depends on.
String
getName()
boolean
isContextDocumentNodeSet()
Determine, in the case of an expression whose data type is Value.NODESET, whether all the nodes in the node-set are guaranteed to come from the same document as the context node.
Expression
reduce(int dependencies, Context context)
Remove specified dependencies.
Expression
simplify()
Simplify and validate

Methods inherited from class com.icl.saxon.expr.Function

addArgument, checkArgumentCount, display, getName, getNumberOfArguments

Methods inherited from class com.icl.saxon.expr.Expression

containsReferences, display, enumerate, evaluate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsNumber, evaluateAsString, getDataType, getDependencies, getStaticContext, indent, isContextDocumentNodeSet, make, outputStringValue, reduce, setStaticContext, simplify, usesCurrent

Method Details

evaluate

public Value evaluate(Context context)
            throws XPathException
Evaluate in a general context
Overrides:
evaluate in interface Expression

evaluateAsNodeSet

public NodeSetValue evaluateAsNodeSet(Context context)
            throws XPathException
Evaluate in a context where a node-set is required
Overrides:
evaluateAsNodeSet in interface Expression

getDataType

public int getDataType()
Determine the data type of the expression
Overrides:
getDataType in interface Expression

Returns:
Value.NODESET

getDependencies

public int getDependencies()
Determine which aspects of the context the expression depends on. The result is a bitwise-or'ed value composed from constants such as Context.VARIABLES and Context.CURRENT_NODE
Overrides:
getDependencies in interface Expression

getName

public String getName()
Overrides:
getName in interface Function

isContextDocumentNodeSet

public boolean isContextDocumentNodeSet()
Determine, in the case of an expression whose data type is Value.NODESET, whether all the nodes in the node-set are guaranteed to come from the same document as the context node. Used for optimization.
Overrides:
isContextDocumentNodeSet in interface Expression

reduce

public Expression reduce(int dependencies,
                         Context context)
            throws XPathException
Remove specified dependencies.
Overrides:
reduce in interface Expression

simplify

public Expression simplify()
            throws XPathException
Simplify and validate
Overrides:
simplify in interface Expression

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