Package serp.bytecode
Class ClassInstruction
java.lang.Object
serp.bytecode.CodeEntry
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.-
Field Summary
Fields -
Constructor Summary
Constructors -
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.(package private) int
Return the length in bytes of this opcode, including all arguments.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.(package private) void
Read the arguments for this opcode from the given stream.(package private) void
read
(Instruction other) Copy the given instruction data.Set the type of this instruction.setTypeIndex
(int index) Set theConstantPool
index of theClassEntry
describing the class for this instruction.(package private) void
write
(DataOutput out) Write the arguments for this opcode to the given stream.Methods inherited from class serp.bytecode.TypedInstruction
getType, getTypeBC, mapType, setType, setType
Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getLogicalStackChange, getName, getOpcode, getPool, getProject, invalidate, invalidateByteIndexes, isValid, setOpcode
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Field Details
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_index
private int _index
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Constructor Details
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ClassInstruction
ClassInstruction(Code owner, int opcode)
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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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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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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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read
Description copied from class:Instruction
Copy the given instruction data.- Overrides:
read
in classInstruction
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read
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 classInstruction
- Throws:
IOException
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write
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 classInstruction
- Throws:
IOException
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