com.icl.saxon.expr
Class VariableReference
public class VariableReference
Variable reference: a reference to an XSL variable
void | display(int level) - Diagnostic print of expression structure
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Value | evaluate(Context c) - Get the value of this variable in a given context.
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Binding | getBinding() - Get the object bound to the variable
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int | getDataType() - Determine the data type of the expression, if possible
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int | getDependencies() - Determine which aspects of the context the expression depends on.
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Expression | reduce(int dependencies, Context context) - Perform a partial evaluation of the expression, by eliminating specified dependencies
on the context.
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Expression | simplify() - Simplify the expression.
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containsReferences , display , enumerate , evaluate , evaluateAsBoolean , evaluateAsNodeSet , evaluateAsNumber , evaluateAsString , getDataType , getDependencies , getStaticContext , indent , isContextDocumentNodeSet , make , outputStringValue , reduce , setStaticContext , simplify , usesCurrent |
display
public void display(int level)
Diagnostic print of expression structure
- display in interface Expression
getBinding
public Binding getBinding()
Get the object bound to the variable
getDataType
public int getDataType()
Determine the data type of the expression, if possible
- getDataType in interface Expression
- the type of the variable, if this can be determined statically;
otherwise Value.ANY (meaning not known in advance)
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
- getDependencies in interface Expression
reduce
public Expression reduce(int dependencies,
Context context)
throws XPathException
Perform a partial evaluation of the expression, by eliminating specified dependencies
on the context.
- reduce in interface Expression
dependencies
- The dependencies to be removedcontext
- The context to be used for the partial evaluation
- a new expression that does not have any of the specified
dependencies
simplify
public Expression simplify()
Simplify the expression. If the variable has a fixed value, the variable reference
will be replaced with that value.
- simplify in interface Expression