com.icl.saxon.expr
Class SingletonComparison
public class SingletonComparison
Singleton Comparison: A Relational Expression that compares a singleton node-set with a string
or numeric value for equals, not-equals, greater-than or less-than.
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
evaluate
public Value evaluate(Context c)
throws XPathException
Evaluate the expression in a given context
- evaluate in interface Expression
c
- the given context for evaluation
- a BooleanValue representing the result of the comparison of the two operands
evaluateAsBoolean
public boolean evaluateAsBoolean(Context c)
throws XPathException
Evaluate the expression in a given context
- evaluateAsBoolean in interface Expression
c
- the given context for evaluation
- a boolean representing the result of the numeric comparison of the two operands
getDataType
public int getDataType()
Determine the data type of the expression, if possible
- getDataType in interface Expression
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