Package org.apache.bcel.generic
Class LocalVariableInstruction
java.lang.Object
org.apache.bcel.generic.Instruction
org.apache.bcel.generic.LocalVariableInstruction
- All Implemented Interfaces:
Cloneable,IndexedInstruction,TypedInstruction
- Direct Known Subclasses:
IINC,LoadInstruction,StoreInstruction
public abstract class LocalVariableInstruction
extends Instruction
implements TypedInstruction, IndexedInstruction
Abstract super class for instructions dealing with local variables.
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected intDeprecated.(since 6.0) will be made private; do not access directly, use getter/setterFields inherited from class org.apache.bcel.generic.Instruction
length, opcode -
Constructor Summary
ConstructorsModifierConstructorDescriptionprotectedLocalVariableInstruction(short opcode, short cTag, int n) -
Method Summary
Modifier and TypeMethodDescriptionvoiddump(DataOutputStream out) Dump instruction as byte code to stream out.shortfinal intgetIndex()Returns the type associated with the instruction - in case of ALOAD or ASTORE Type.OBJECT is returned.protected voidinitFromFile(ByteSequence bytes, boolean wide) Read needed data (e.g.voidsetIndex(int n) Sets the local variable index.toString(boolean verbose) Long output format: <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< local variable index>">"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
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Field Details
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n
Deprecated.(since 6.0) will be made private; do not access directly, use getter/setter
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Constructor Details
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LocalVariableInstruction
- Parameters:
opcode- Instruction opcodecTag- Instruction number for compact version, ALOAD_0, e.g.n- local variable index (unsigned short)
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Method Details
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dump
Dump instruction as byte code to stream out.- Overrides:
dumpin classInstruction- Parameters:
out- Output stream- Throws:
IOException- Thrown when an I/O exception of some sort has occurred.
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getCanonicalTag
- Returns:
- canonical tag for instruction, e.g., ALOAD for ALOAD_0
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getIndex
- Specified by:
getIndexin interfaceIndexedInstruction- Returns:
- local variable index (n) referred by this instruction.
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getType
Returns the type associated with the instruction - in case of ALOAD or ASTORE Type.OBJECT is returned. This is just a bit incorrect, because ALOAD and ASTORE may work on every ReferenceType (including Type.NULL) and ASTORE may even work on a ReturnaddressType .- Specified by:
getTypein interfaceTypedInstruction- Returns:
- type associated with the instruction
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initFromFile
Read needed data (e.g. index) from file.(ILOAD <= tag <= ALOAD_3) || (ISTORE <= tag <= ASTORE_3)
- Overrides:
initFromFilein classInstruction- Parameters:
bytes- byte sequence to read fromwide- "wide" instruction flag- Throws:
IOException- may be thrown if the implementation needs to read data from the file
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setIndex
Sets the local variable index. also updates opcode and length TODO Why?- Specified by:
setIndexin interfaceIndexedInstruction- See Also:
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setIndexOnly(int)
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toString
Long output format: <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< local variable index>">"- Overrides:
toStringin classInstruction- Parameters:
verbose- long/short format switch- Returns:
- mnemonic for instruction
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