Package com.saxonica.ee.bytecode

Class ValueComparisonCompiler

java.lang.Object

com.saxonica.ee.bytecode.ExpressionCompiler

com.saxonica.ee.bytecode.ToBooleanCompiler

com.saxonica.ee.bytecode.ValueComparisonCompiler

public class ValueComparisonCompiler
extends ToBooleanCompiler

Generate code for a ValueComparison

Constructor Summary

Constructors

Constructor	Description
ValueComparisonCompiler()

Method Summary

Modifier and Type	Method	Description
void	compileToBoolean(CompilerService compiler, Expression expression)	Generate bytecode to evaluate the ValueComparison as a boolean value Precondition: none.
void	compileToItem(CompilerService compiler, Expression expression)	Generate bytecode to evaluate the expression as an Item Precondition: none.
static int	translateOperator(int op)

Methods inherited from class com.saxonica.ee.bytecode.ToBooleanCompiler

compileToIterator, compileToPush

Methods inherited from class com.saxonica.ee.bytecode.ExpressionCompiler

allocateStatic, compileItemFromInt, compileToPrimitive, generateMethod, handleEmptyStringResult, printStackTop, verify, visitAnnotation, visitLineNumber

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ValueComparisonCompiler

public ValueComparisonCompiler()

Method Detail

compileToItem

public void compileToItem(CompilerService compiler,
                          Expression expression)
                   throws CannotCompileException

Generate bytecode to evaluate the expression as an Item Precondition: none. Postcondition: the stack contains either an item (the result of the expression), or null (representing an empty sequence).

Overrides:

compileToItem in class ToBooleanCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

compileToBoolean

public void compileToBoolean(CompilerService compiler,
                             Expression expression)
                      throws CannotCompileException

Generate bytecode to evaluate the ValueComparison as a boolean value Precondition: none. Postcondition: the stack contains an boolean value representing the result of the expression

Specified by:

compileToBoolean in class ExpressionCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

translateOperator

public static int translateOperator(int op)