Class CodeWriter

java.lang.Object

com.ibm.wala.shrike.shrikeCT.ClassWriter.Element

com.ibm.wala.shrike.shrikeCT.CodeWriter

public final class CodeWriter
extends ClassWriter.Element

This class helps emit Code elements.

After constructing a CodeWriter, at least the max stack, max locals and bytecode bytes must be set before it can be used.

Constructor Summary

Constructors

Constructor	Description
CodeWriter(ClassWriter w)	Build an empty serializable Code attribute.

Method Summary

Modifier and Type	Method	Description
int	copyInto(byte[] buf, int offset)	Copy the bytes into 'buf' at offset 'offset'.
int	getCodeLength()
int	getSize()
void	setAttributes(ClassWriter.Element[] attributes)	Set the attributes of this Code.
void	setCode(byte[] code)	Set the bytecodes for this Code attribute.
void	setMaxLocals(int maxLocals)	Set the maximum number of local variable space used, in words, by this Code.
void	setMaxStack(int maxStack)	Set the maximum stack size, in words, in this Code.
void	setRawHandlers(int[] exnHandlers)	Set the raw handler data for this Code attribute.

Methods inherited from class java.lang.Object

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

Constructor Details

CodeWriter

public CodeWriter(ClassWriter w)

Build an empty serializable Code attribute.

Throws:

IllegalArgumentException - if w is null

Method Details

getCodeLength

public int getCodeLength()
                  throws IllegalStateException

Throws:

IllegalStateException

getSize

public int getSize()
            throws IllegalArgumentException

Specified by:

getSize in class ClassWriter.Element

Returns:

the number of bytes that will be generated.

Throws:

IllegalArgumentException

copyInto

public int copyInto(byte[] buf,
 int offset)
             throws IllegalArgumentException

Description copied from class: ClassWriter.Element

Copy the bytes into 'buf' at offset 'offset'.

Specified by:

copyInto in class ClassWriter.Element

Returns:

the number of bytes copies, which must be equal to getSize()

Throws:

IllegalArgumentException

setCode

public void setCode(byte[] code)
             throws IllegalArgumentException

Set the bytecodes for this Code attribute.

Throws:

IllegalArgumentException - if code is null

setRawHandlers

public void setRawHandlers(int[] exnHandlers)

Set the raw handler data for this Code attribute.

Parameters:

exnHandlers - a flattened sequence of (startPC, endPC, catchClassIndex, catchPC) tuples

Throws:

IllegalArgumentException - if exnHandlers is null

setMaxLocals

public void setMaxLocals(int maxLocals)

Set the maximum number of local variable space used, in words, by this Code.

setMaxStack

public void setMaxStack(int maxStack)

Set the maximum stack size, in words, in this Code.

setAttributes

public void setAttributes(ClassWriter.Element[] attributes)

Set the attributes of this Code.