Package com.saxonica.ee.bytecode

Class AtomizerCompiler

java.lang.Object

com.saxonica.ee.bytecode.ExpressionCompiler

com.saxonica.ee.bytecode.ToIteratorCompiler

com.saxonica.ee.bytecode.AtomizerCompiler

public class AtomizerCompiler
extends ToIteratorCompiler

Generate code for Atomizer

Constructor Summary

Constructors

Constructor	Description
AtomizerCompiler()

Method Summary

Modifier and Type	Method	Description
void	compileToItem(CompilerService compiler, Expression expression)	Generate bytecode to evaluate the Atomizer as an Item Precondition: none.
void	compileToIterator(CompilerService compiler, Expression expression)	Generate bytecode to evaluate the Atomizer as a MappingIterator (i.e.
void	compileToPrimitive(CompilerService compiler, Expression expression, java.lang.Class requiredClass, OnEmpty onEmpty)	Generate bytecode to evaluate the expression leaving a plain Java value on the stack.

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

compileToBoolean, compileToPush

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

allocateStatic, compileItemFromInt, 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

AtomizerCompiler

public AtomizerCompiler()

Method Detail

compileToItem

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

Generate bytecode to evaluate the Atomizer as an Item Precondition: none. Postcondition: the stack contains an Item representing the result of the expression

Overrides:

compileToItem in class ToIteratorCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

compileToPrimitive

public void compileToPrimitive(CompilerService compiler,
                               Expression expression,
                               java.lang.Class requiredClass,
                               OnEmpty onEmpty)
                        throws CannotCompileException

Description copied from class: ExpressionCompiler

Generate bytecode to evaluate the expression leaving a plain Java value on the stack. This method must only be called if the static type of the expressionis such that the value is known to be representable by a value of the specified class; the cardinality must be either exactly-one or zero-or-one.

Overrides:

compileToPrimitive in class ExpressionCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

requiredClass - the class of the Java value that is to be left on the stack if the generated code exits normally. This must be one of Integer.TYPE, Double.TYPE, Float.TYPE, BigDecimal.class, CharSequence.class.

onEmpty - defines the action to be taken if the expression evaluates to the empty sequence. May be null if the expression is known statically not to evaluate to an empty sequence. If the return class is a primitive type (double, float, etc) this must be an instance of OnEmpty.UnwindAndJump

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

compileToIterator

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

Generate bytecode to evaluate the Atomizer as a MappingIterator (i.e. return new MappingIterator(base, AtomizingFunction.getInstance())) Precondition: none. Postcondition: the stack contains a MappingIterator representing the result of the expression

Specified by:

compileToIterator in class ExpressionCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode