Package org.apache.bcel.generic

Class SWITCH

java.lang.Object

org.apache.bcel.generic.SWITCH

All Implemented Interfaces:

CompoundInstruction

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.

Constructor Summary

Constructors

Constructor	Description
SWITCH(int[] match, InstructionHandle[] targets, InstructionHandle target)	Constructs a SWITCH with default maxGap of 1.
SWITCH(int[] match, InstructionHandle[] targets, InstructionHandle target, int maxGap)	Template for switch() constructs.

Method Summary

Modifier and Type	Method	Description
Instruction	getInstruction()	Gets the instruction.
InstructionList	getInstructionList()	Gets the instruction list.

Methods inherited from class java.lang.Object

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

Constructor Detail

SWITCH

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

Constructs a SWITCH with default maxGap of 1.

Parameters:

match - array of match values.

targets - The instructions to be branched to for each case.

target - The default target.

SWITCH

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

Template for switch() constructs. If the match array can be sorted in ascending order with gaps no larger than maxGap 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.

maxGap - maximum gap that may between case branches.

Method Detail

getInstruction

public Instruction getInstruction()

Gets the instruction.

Returns:

The instruction.

getInstructionList

public InstructionList getInstructionList()

Description copied from interface: CompoundInstruction

Gets the instruction list.

Specified by:

getInstructionList in interface CompoundInstruction

Returns:

The instruction list.