Package serp.bytecode
Class IfInstruction
- 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.IfInstruction
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- All Implemented Interfaces:
BCEntity
,InstructionPtr
,VisitAcceptor
public class IfInstruction extends JumpInstruction
An if instruction such asifnull, ifeq
, etc.
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Constructor Summary
Constructors Constructor Description IfInstruction(Code owner, int opcode)
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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.(package private) int
getLength()
Return the length in bytes of this opcode, including all arguments.int
getStackChange()
Return the number of stack positions this instruction pushes or pops during its execution.java.lang.String
getTypeName()
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Methods inherited from class serp.bytecode.JumpInstruction
equalsInstruction, getOffset, getTarget, read, read, replaceTarget, setOffset, setTarget, updateTargets, write
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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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IfInstruction
IfInstruction(Code owner, int opcode)
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Method Detail
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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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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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getTypeName
public java.lang.String getTypeName()
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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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