Package serp.bytecode
Class ClassInstruction
java.lang.Object
serp.bytecode.Instruction
serp.bytecode.TypedInstruction
serp.bytecode.ClassInstruction
- All Implemented Interfaces:
BCEntity
,VisitAcceptor
- Direct Known Subclasses:
MultiANewArrayInstruction
An instruction that takes as an argument a class to operate
on. Examples include
anewarray, checkcast, instance, anew
, etc.- Author:
- Abe White
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Method Summary
Modifier and TypeMethodDescriptionvoid
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.boolean
equalsInstruction
(Instruction other) ClassInstructions are equal if the type they reference is the same or unset and if their opcodes are equal.int
Return the number of stack positions this instruction pushes or pops during its execution.int
Return theConstantPool
index of theClassEntry
describing the class for this instruction.Return the type name for this instruction.Set the type of this instruction.setTypeIndex
(int index) Set theConstantPool
index of theClassEntry
describing the class for this instruction.Methods inherited from class serp.bytecode.TypedInstruction
getType, getTypeBC, setType, setType
Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getLogicalStackChange, getName, getOpcode, getPool, getProject, isValid
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Method Details
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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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getTypeIndex
public int getTypeIndex()Return theConstantPool
index of theClassEntry
describing the class for this instruction. -
setTypeIndex
Set theConstantPool
index of theClassEntry
describing the class for this instruction.- Returns:
- this instruction, for method chaining
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getTypeName
Description copied from class:TypedInstruction
Return the type name for this instruction. If the type has not been set, this method will return null.- Specified by:
getTypeName
in classTypedInstruction
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setType
Description copied from class:TypedInstruction
Set the type of this instruction. Types that have no direct support will be converted accordingly.- Specified by:
setType
in classTypedInstruction
- Returns:
- this instruction, for method chaining
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equalsInstruction
ClassInstructions are equal if the type they reference is the same or unset and if their opcodes are equal.- Overrides:
equalsInstruction
in classInstruction
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acceptVisit
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 classInstruction
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