fr.umlv.corosol.component.instruction.impl
Class DefaultJOperandInput

java.lang.Object
  fr.umlv.corosol.component.instruction.impl.DefaultJOperandInput

All Implemented Interfaces:

JOperandInput, JImplementationRepository.Singleton

public class DefaultJOperandInput
extends java.lang.Object
implements JOperandInput, JImplementationRepository.Singleton

Author:

Christophe Deleray

Constructor Summary

DefaultJOperandInput()

Method Summary

void	fillInput(byte[] byteCode, int offset, int len) Reads up length bytes in the specified array from the offset index in order to be parsed by this JOperandInput.
byte	readByte() Reads a byte from the byte code stream.
int	readInt() Reads an integer from the byte code stream.
short	readShort() Reads a short integer from the byte code stream.
int	readUnsignedByte() Reads an unsigned byte from the byte code stream.
int	skipNullBytes() Skips the padding bytes following the lookupswitch and tableswitch instruction.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultJOperandInput

public DefaultJOperandInput()

Method Detail

readByte

public byte readByte()
              throws java.io.IOException

Reads a byte from the byte code stream.

Specified by:

readByte in interface JOperandInput

Returns:

a byte read from this stream

Throws:

java.io.IOException - if an I/O error occurs during the reading of the byte code

readUnsignedByte

public int readUnsignedByte()
                     throws java.io.IOException

Reads an unsigned byte from the byte code stream.

Specified by:

readUnsignedByte in interface JOperandInput

Returns:

an unsigned byte byte read from this stream

Throws:

java.io.IOException - if an I/O error occurs during the reading of the byte code

readShort

public short readShort()
                throws java.io.IOException

Reads a short integer from the byte code stream.

Specified by:

readShort in interface JOperandInput

Returns:

a short read from this stream

Throws:

java.io.IOException - if an I/O error occurs during the reading of the byte code

readInt

public int readInt()
            throws java.io.IOException

Reads an integer from the byte code stream.

Specified by:

readInt in interface JOperandInput

Returns:

an integer read from this stream

Throws:

java.io.IOException - if an I/O error occurs during the reading of the byte code

skipNullBytes

public int skipNullBytes()
                  throws java.io.IOException

Skips the padding bytes following the lookupswitch and tableswitch instruction.

Specified by:

skipNullBytes in interface JOperandInput

Returns:

the amount of null bytes skipped

Throws:

java.io.IOException - if an I/O error occurs during the reading of the byte code

fillInput

public void fillInput(byte[] byteCode,
                      int offset,
                      int len)

Description copied from interface: JOperandInput

Reads up length bytes in the specified array from the offset index in order to be parsed by this JOperandInput.

Specified by:

fillInput in interface JOperandInput

Parameters:

byteCode - the buffer which operands are read

offset - the offset from which the operands are read

len - the number of bytes to be read in the bytecode array