com.icl.saxon.functions

Class Id

public class Id extends Function

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

Method Detail

evaluate

public Value evaluate(Context context)

Evaluate in a general context

evaluateAsNodeSet

public NodeSetValue evaluateAsNodeSet(Context context)

Evaluate in a context where a node-set is required

getDataType

public int getDataType()

Determine the data type of the 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

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.

reduce

public Expression reduce(int dependencies, Context context)

Remove specified dependencies.

simplify

public Expression simplify()

Simplify and validate