Package org.apache.bcel.generic
Class Select
java.lang.Object
org.apache.bcel.generic.Instruction
org.apache.bcel.generic.BranchInstruction
org.apache.bcel.generic.Select
- All Implemented Interfaces:
Cloneable
,InstructionTargeter
,StackConsumer
,StackProducer
,VariableLengthInstruction
- Direct Known Subclasses:
LOOKUPSWITCH
,TABLESWITCH
public abstract class Select
extends BranchInstruction
implements VariableLengthInstruction, StackConsumer, StackProducer
Select - Abstract super class for LOOKUPSWITCH and TABLESWITCH instructions.
We use our super's target
property as the default target.
- See Also:
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Field Summary
Modifier and TypeFieldDescriptionprotected int
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setterprotected int[]
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setterprotected int[]
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setterprotected int
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setterprotected int
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setterprotected InstructionHandle[]
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setterFields inherited from class org.apache.bcel.generic.BranchInstruction
index, position, target
Fields inherited from class org.apache.bcel.generic.Instruction
length, opcode
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Method Summary
Modifier and TypeMethodDescriptionprotected Object
clone()
boolean
Tests whether this targeter targets the specified instruction handle.void
dump
(DataOutputStream out) Dump instruction as byte code to stream out.int[]
int[]
protected void
initFromFile
(ByteSequence bytes, boolean wide) Read needed data (e.g.void
setTarget
(int i, InstructionHandle target) Sets branch target for 'i'th casetoString
(boolean verbose) Long output format: <position in byte code> <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"<target instruction>">" "@"<branch target offset>protected int
updatePosition
(int offset, int maxOffset) Since this is a variable length instruction, it may shift the following instructions which then need to update their position.void
updateTarget
(InstructionHandle oldIh, InstructionHandle newIh) Replaces the target of this targeter from this old handle to the new handle.Methods inherited from class org.apache.bcel.generic.BranchInstruction
getIndex, getPosition, getTarget, getTargetOffset, getTargetOffset, setIndex, setPosition, setTarget
Methods inherited from class org.apache.bcel.generic.Instruction
accept, consumeStack, copy, equals, getComparator, getLength, getName, getOpcode, hashCode, isValidByte, isValidShort, produceStack, readInstruction, setComparator, toString, toString
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.bcel.generic.StackConsumer
consumeStack
Methods inherited from interface org.apache.bcel.generic.StackProducer
produceStack
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Field Details
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match
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setter -
indices
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setter -
targets
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setter -
fixed_length
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setter -
match_length
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setter -
padding
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setter
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Method Details
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clone
- Overrides:
clone
in classObject
- Throws:
CloneNotSupportedException
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containsTarget
Description copied from interface:InstructionTargeter
Tests whether this targeter targets the specified instruction handle.- Specified by:
containsTarget
in interfaceInstructionTargeter
- Overrides:
containsTarget
in classBranchInstruction
- Parameters:
ih
- the instruction handle to test.- Returns:
- true, if ih is target of this instruction
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dump
Dump instruction as byte code to stream out.- Overrides:
dump
in classBranchInstruction
- Parameters:
out
- Output stream- Throws:
IOException
- Thrown when an I/O exception of some sort has occurred.
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getIndices
- Returns:
- array of match target offsets
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getMatchs
- Returns:
- array of match indices
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getTargets
- Returns:
- array of match targets
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initFromFile
Read needed data (e.g. index) from file.- Overrides:
initFromFile
in classBranchInstruction
- Parameters:
bytes
- input streamwide
- wide prefix?- Throws:
IOException
- may be thrown if the implementation needs to read data from the file- See Also:
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setTarget
Sets branch target for 'i'th case -
toString
Description copied from class:BranchInstruction
Long output format: <position in byte code> <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"<target instruction>">" "@"<branch target offset>- Overrides:
toString
in classBranchInstruction
- Parameters:
verbose
- long/short format switch- Returns:
- mnemonic for instruction
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updatePosition
Since this is a variable length instruction, it may shift the following instructions which then need to update their position. Called by InstructionList.setPositions when setting the position for every instruction. In the presence of variable length instructions 'setPositions' performs multiple passes over the instruction list to calculate the correct (byte) positions and offsets by calling this function.- Overrides:
updatePosition
in classBranchInstruction
- Parameters:
offset
- additional offset caused by preceding (variable length) instructionsmaxOffset
- the maximum offset that may be caused by these instructions- Returns:
- additional offset caused by possible change of this instruction's length
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updateTarget
Description copied from interface:InstructionTargeter
Replaces the target of this targeter from this old handle to the new handle.- Specified by:
updateTarget
in interfaceInstructionTargeter
- Overrides:
updateTarget
in classBranchInstruction
- Parameters:
oldIh
- old targetnewIh
- new target
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