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org.apache.bcel.generic
Class SWITCH  

java.lang.Object
  org.apache.bcel.generic.SWITCH

All Implemented Interfaces:

CompoundInstruction

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public final class SWITCH

extends java.lang.Object

implements CompoundInstruction

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: SWITCH.java 386056 2006-03-15 11:31:56Z tcurdt $

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Field Summary
private  Select	instruction
private  int[]	match
private  int	match_length
private  InstructionHandle[]	targets

 

Constructor Summary

SWITCH(int[] match, InstructionHandle[] targets, InstructionHandle target)

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

 

Method Summary
private  void	fillup(int max_gap, InstructionHandle target)
Instruction	getInstruction()
InstructionList	getInstructionList()
private  boolean	matchIsOrdered(int max_gap)
private  void	sort(int l, int r)           Sort match and targets array with QuickSort.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

match

private int[] match

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targets

private InstructionHandle[] targets

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instruction

private Select instruction

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match_length

private int match_length

Constructor Detail

SWITCH

public SWITCH(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.

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SWITCH

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

Method Detail

fillup

private final void fillup(int max_gap,
                          InstructionHandle target)

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sort

private final void sort(int l,
                        int r)

Sort match and targets array with QuickSort.

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matchIsOrdered

private final boolean matchIsOrdered(int max_gap)

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getInstructionList

public final InstructionList getInstructionList()

Specified by:

getInstructionList in interface CompoundInstruction

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getInstruction

public final Instruction getInstruction()

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