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java.lang.Objectcom.icl.saxon.expr.Expression
com.icl.saxon.expr.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.
| Field Summary | 
| Fields inherited from class com.icl.saxon.expr.Expression | 
| staticContext | 
| Constructor Summary | |
| SingletonComparison(SingletonExpression p1,
                    int op,
                    Value p2) | |
| Method Summary | |
|  void | display(int level)Diagnostic print of expression structure | 
|  Value | evaluate(Context c)Evaluate the expression in a given context | 
|  boolean | evaluateAsBoolean(Context c)Evaluate the expression in a given context | 
|  int | getDataType()Determine the data type of the expression, if possible | 
|  int | getDependencies()Determine which aspects of the context the expression depends on. | 
|  Expression | reduce(int dependencies,
       Context context)Perform a partial evaluation of the expression, by eliminating specified dependencies on the context. | 
|  Expression | simplify()Simplify an expression | 
| Methods inherited from class com.icl.saxon.expr.Expression | 
| containsReferences, enumerate, evaluateAsNodeSet, evaluateAsNumber, evaluateAsString, getStaticContext, indent, isContextDocumentNodeSet, make, outputStringValue, setStaticContext, usesCurrent | 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
| Constructor Detail | 
public SingletonComparison(SingletonExpression p1,
                           int op,
                           Value p2)
| Method Detail | 
public Expression simplify()
                    throws XPathException
simplify in class ExpressionXPathException
public Value evaluate(Context c)
               throws XPathException
evaluate in class Expressionc - the given context for evaluation
XPathException
public boolean evaluateAsBoolean(Context c)
                          throws XPathException
evaluateAsBoolean in class Expressionc - the given context for evaluation
XPathExceptionpublic int getDataType()
getDataType in class Expressionpublic int getDependencies()
getDependencies in class Expression
public Expression reduce(int dependencies,
                         Context context)
                  throws XPathException
reduce in class Expressiondependencies - The dependencies to be removedcontext - The context to be used for the partial evaluation
XPathExceptionpublic void display(int level)
display in class Expression| 
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