fr.umlv.corosol.component.instruction
Interface JOperandInput

All Known Implementing Classes:

DefaultJOperandInput, SimpleJOperandInput

public interface JOperandInput

The JOperandInput interface provides for reading operands from a bytecode stream and reconstructing from them data in any Java primitives types.

Author:

Christophe Deleray

See Also:

JInstruction

Method Summary

void	fillInput(byte[] bytecode, int offset, int length) 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.

Method Detail

readByte

byte readByte()
              throws java.io.IOException

Reads a byte from the byte code stream.

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

int readUnsignedByte()
                     throws java.io.IOException

Reads an unsigned byte from the byte code stream.

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

short readShort()
                throws java.io.IOException

Reads a short integer from the byte code stream.

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

int readInt()
            throws java.io.IOException

Reads an integer from the byte code stream.

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

int skipNullBytes()
                  throws java.io.IOException

Skips the padding bytes following the lookupswitch and tableswitch instruction.

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

void fillInput(byte[] bytecode,
               int offset,
               int length)

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

Parameters:

bytecode - the buffer which operands are read

offset - the offset from which the operands are read

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