com.saxonica.codegen
Class EmptyCompiler

java.lang.Object
  extended by com.saxonica.codegen.ExpressionCompiler
      extended by com.saxonica.codegen.ToBooleanCompiler
          extended by com.saxonica.codegen.EmptyCompiler

public class EmptyCompiler
extends ToBooleanCompiler

Generate Java code for an empty() function call


Constructor Summary
EmptyCompiler()
           
 
Method Summary
 String compileToEffectiveBooleanValue(CompilerService compiler, Expression expr, ReturnAction result)
          Generate Java code to evaluate the effective boolean value of the expression
 
Methods inherited from class com.saxonica.codegen.ToBooleanCompiler
compilePush, compileToCharSequence, compileToItem, compileToIterator
 
Methods inherited from class com.saxonica.codegen.ExpressionCompiler
compileAsLoop, compileToValueRepresentation, getConfiguration, makeExpressionCompiler, setConfiguration
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

EmptyCompiler

public EmptyCompiler()
Method Detail

compileToEffectiveBooleanValue

public String compileToEffectiveBooleanValue(CompilerService compiler,
                                             Expression expr,
                                             ReturnAction result)
Description copied from class: ExpressionCompiler
Generate Java code to evaluate the effective boolean value of the expression

Specified by:
compileToEffectiveBooleanValue in class ToBooleanCompiler
Parameters:
compiler - the compiler service
expr - the XPath expression to be compiled
result - indicates how the boolean result is to be returned
Returns:
the result depends on the supplied value of the options argument. If options is a JavaDeclaration, the code must declare a Java variable and return the name of this variable. If options is a JavaAssignment, the code must assign the value to an existing Java variable. If options is a Return, the code must generate a return statement that returns the value of the boolean (in which case the result of this method is null).


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