Package org.apache.bcel.generic

Class LDC

java.lang.Object

org.apache.bcel.generic.Instruction

org.apache.bcel.generic.CPInstruction

org.apache.bcel.generic.LDC

All Implemented Interfaces:

java.lang.Cloneable, ExceptionThrower, IndexedInstruction, PushInstruction, StackProducer, TypedInstruction

Direct Known Subclasses:

LDC_W

public class LDC
extends CPInstruction
implements PushInstruction, ExceptionThrower

LDC - Push item from constant pool.

 Stack: ... -> ..., item
 

Field Summary

Fields inherited from class org.apache.bcel.generic.CPInstruction

index

Fields inherited from class org.apache.bcel.generic.Instruction

length, opcode

Constructor Summary

Constructors

Constructor	Description
LDC(int index)	Constructs an LDC instruction.

Method Summary

Modifier and Type	Method	Description
void	accept(Visitor v)	Call corresponding visitor method(s).
void	dump(java.io.DataOutputStream out)	Dumps instruction as byte code to stream out.
java.lang.Class<?>[]	getExceptions()	Gets the exceptions that may be thrown by this instruction.
Type	getType(ConstantPoolGen cpg)	Gets the type associated with this instruction.
java.lang.Object	getValue(ConstantPoolGen cpg)	Gets the constant value from the constant pool.
protected void	initFromFile(ByteSequence bytes, boolean wide)	Reads needed data (for example index) from file.
void	setIndex(int index)	Sets the index to constant pool and adjust size.
protected void	setSize()	Adjusts to proper size.

Methods inherited from class org.apache.bcel.generic.CPInstruction

getIndex, toString, toString

Methods inherited from class org.apache.bcel.generic.Instruction

consumeStack, copy, equals, getComparator, getLength, getName, getOpcode, hashCode, isValidByte, isValidShort, produceStack, readInstruction, setComparator, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.bcel.generic.StackProducer

produceStack

Constructor Detail

LDC

public LDC(int index)

Constructs an LDC instruction.

Parameters:

index - index into constant pool.

Method Detail

accept

public void accept(Visitor v)

Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call methods according to the class hierarchy in descending order, that is, the most specific visitXXX() call comes last.

Specified by:

accept in class Instruction

Parameters:

v - Visitor object.

dump

public void dump(java.io.DataOutputStream out)
          throws java.io.IOException

Dumps instruction as byte code to stream out.

Overrides:

dump in class CPInstruction

Parameters:

out - Output stream.

Throws:

java.io.IOException - Thrown when an I/O exception of some sort has occurred.

getExceptions

public java.lang.Class<?>[] getExceptions()

Description copied from interface: ExceptionThrower

Gets the exceptions that may be thrown by this instruction.

Specified by:

getExceptions in interface ExceptionThrower

Returns:

The exceptions that may be thrown by this instruction.

getType

public Type getType(ConstantPoolGen cpg)

Description copied from interface: TypedInstruction

Gets the type associated with this instruction.

Specified by:

getType in interface TypedInstruction

Overrides:

getType in class CPInstruction

Parameters:

cpg - The constant pool generator.

Returns:

type related with this instruction.

getValue

public java.lang.Object getValue(ConstantPoolGen cpg)

Gets the constant value from the constant pool.

Parameters:

cpg - constant pool generator.

Returns:

The constant value.

initFromFile

protected void initFromFile(ByteSequence bytes,
                            boolean wide)
                     throws java.io.IOException

Reads needed data (for example index) from file.

Overrides:

initFromFile in class CPInstruction

Parameters:

bytes - input stream.

wide - wide prefix?.

Throws:

java.io.IOException - Thrown if the implementation needs to read data from the file

setIndex

public final void setIndex(int index)

Sets the index to constant pool and adjust size.

Specified by:

setIndex in interface IndexedInstruction

Overrides:

setIndex in class CPInstruction

Parameters:

index - in constant pool.

setSize

protected final void setSize()

Adjusts to proper size.