Package serp.bytecode
Class LookupSwitchInstruction
- java.lang.Object
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- serp.bytecode.CodeEntry
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- serp.bytecode.Instruction
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- serp.bytecode.JumpInstruction
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- serp.bytecode.LookupSwitchInstruction
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- All Implemented Interfaces:
BCEntity
,InstructionPtr
,VisitAcceptor
public class LookupSwitchInstruction extends JumpInstruction
Thelookupswitch
instruction.
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Constructor Summary
Constructors Constructor Description LookupSwitchInstruction(Code owner)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
acceptVisit(BCVisitor visit)
Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.LookupSwitchInstruction
addCase(int match, Instruction target)
Add a case to this switch.private Instruction
findJumpPoint(int jumpByteIndex, java.util.List inss)
int
getDefaultOffset()
Synonymous withJumpInstruction.getOffset()
.Instruction
getDefaultTarget()
Synonymous withJumpInstruction.getTarget()
.(package private) int
getLength()
Return the length in bytes of this opcode, including all arguments.int[]
getMatches()
Return the values of the case statements for this switch.int[]
getOffsets()
int
getStackChange()
Return the number of stack positions this instruction pushes or pops during its execution.Instruction[]
getTargets()
Return the targets of the case statements for this switch.(package private) void
read(java.io.DataInput in)
Read the arguments for this opcode from the given stream.(package private) void
read(Instruction orig)
Copy the given instruction data.void
replaceTarget(Instruction oldTarget, Instruction newTarget)
Replace the given old, likely invalid, target with a new target.LookupSwitchInstruction
setCases(int[] matches, Instruction[] targets)
Set the match-jumppt pairs for this switch.LookupSwitchInstruction
setDefaultOffset(int offset)
Synonymous withJumpInstruction.setOffset(int)
.LookupSwitchInstruction
setDefaultTarget(Instruction ins)
Synonymous withJumpInstruction.setTarget(serp.bytecode.Instruction)
.void
updateTargets()
Use the byte indexes read from the class file to calculate and set references to the target instruction(s) for this ptr.(package private) void
write(java.io.DataOutput out)
Write the arguments for this opcode to the given stream.-
Methods inherited from class serp.bytecode.JumpInstruction
equalsInstruction, getOffset, getTarget, setOffset, setTarget
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Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getLogicalStackChange, getName, getOpcode, getPool, getProject, invalidate, invalidateByteIndexes, isValid, setOpcode
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface serp.bytecode.InstructionPtr
getCode
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Constructor Detail
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LookupSwitchInstruction
LookupSwitchInstruction(Code owner)
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Method Detail
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getLength
int getLength()
Description copied from class:Instruction
Return the length in bytes of this opcode, including all arguments. For many opcodes this method relies on an up-to-date byte index.- Overrides:
getLength
in classInstruction
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getStackChange
public int getStackChange()
Description copied from class:Instruction
Return the number of stack positions this instruction pushes or pops during its execution.- Overrides:
getStackChange
in classInstruction
- Returns:
- 0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack
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getDefaultTarget
public Instruction getDefaultTarget()
Synonymous withJumpInstruction.getTarget()
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setDefaultTarget
public LookupSwitchInstruction setDefaultTarget(Instruction ins)
Synonymous withJumpInstruction.setTarget(serp.bytecode.Instruction)
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getDefaultOffset
public int getDefaultOffset()
Synonymous withJumpInstruction.getOffset()
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setDefaultOffset
public LookupSwitchInstruction setDefaultOffset(int offset)
Synonymous withJumpInstruction.setOffset(int)
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setCases
public LookupSwitchInstruction setCases(int[] matches, Instruction[] targets)
Set the match-jumppt pairs for this switch.- Returns:
- this instruction, for method chaining
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getOffsets
public int[] getOffsets()
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getMatches
public int[] getMatches()
Return the values of the case statements for this switch.
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getTargets
public Instruction[] getTargets()
Return the targets of the case statements for this switch.
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addCase
public LookupSwitchInstruction addCase(int match, Instruction target)
Add a case to this switch.- Returns:
- this instruction, for method chaining
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findJumpPoint
private Instruction findJumpPoint(int jumpByteIndex, java.util.List inss)
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updateTargets
public void updateTargets()
Description copied from interface:InstructionPtr
Use the byte indexes read from the class file to calculate and set references to the target instruction(s) for this ptr. This method will be called after the byte code has been read in for the first time and before it is written after modification.- Specified by:
updateTargets
in interfaceInstructionPtr
- Overrides:
updateTargets
in classJumpInstruction
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replaceTarget
public void replaceTarget(Instruction oldTarget, Instruction newTarget)
Description copied from interface:InstructionPtr
Replace the given old, likely invalid, target with a new target. The new target Instruction is guaranteed to be in the same code block as this InstructionPtr.- Specified by:
replaceTarget
in interfaceInstructionPtr
- Overrides:
replaceTarget
in classJumpInstruction
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acceptVisit
public void acceptVisit(BCVisitor visit)
Description copied from interface:VisitAcceptor
Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.- Specified by:
acceptVisit
in interfaceVisitAcceptor
- Overrides:
acceptVisit
in classJumpInstruction
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read
void read(Instruction orig)
Description copied from class:Instruction
Copy the given instruction data.- Overrides:
read
in classJumpInstruction
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read
void read(java.io.DataInput in) throws java.io.IOException
Description copied from class:Instruction
Read the arguments for this opcode from the given stream. This method should be overridden by opcodes that take arguments.- Overrides:
read
in classJumpInstruction
- Throws:
java.io.IOException
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write
void write(java.io.DataOutput out) throws java.io.IOException
Description copied from class:Instruction
Write the arguments for this opcode to the given stream. This method should be overridden by opcodes that take arguments.- Overrides:
write
in classJumpInstruction
- Throws:
java.io.IOException
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