Package org.aspectj.apache.bcel.generic

Class SwitchBuilder

java.lang.Object

org.aspectj.apache.bcel.generic.SwitchBuilder

public final class SwitchBuilder
extends Object

SWITCH - Branch depending on int value, generates either LOOKUPSWITCH or TABLESWITCH instruction, depending on whether the match values (int[]) can be sorted with no gaps between the numbers.

Version:

$Id: SwitchBuilder.java,v 1.2 2008/05/28 23:52:57 aclement Exp $

Author:

M. Dahm

Constructor Summary

Constructors

Constructor	Description
SwitchBuilder(int[] match, InstructionHandle[] targets, InstructionHandle target)
SwitchBuilder(int[] match, InstructionHandle[] targets, InstructionHandle target, int max_gap)	Template for switch() constructs.

Method Summary

Modifier and Type	Method	Description
final InstructionSelect	getInstruction()

Methods inherited from class java.lang.Object

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

Constructor Details

SwitchBuilder

public SwitchBuilder(int[] match,
 InstructionHandle[] targets,
 InstructionHandle target,
 int max_gap)

Template for switch() constructs. If the match array can be sorted in ascending order with gaps no larger than max_gap between the numbers, a TABLESWITCH instruction is generated, and a LOOKUPSWITCH otherwise. The former may be more efficient, but needs more space. Note, that the key array always will be sorted, though we leave the original arrays unaltered.

Parameters:

match - array of match values (case 2: ... case 7: ..., etc.)

targets - the instructions to be branched to for each case

target - the default target

max_gap - maximum gap that may between case branches

SwitchBuilder

public SwitchBuilder(int[] match,
 InstructionHandle[] targets,
 InstructionHandle target)

Method Details

getInstruction

public final InstructionSelect getInstruction()