com.ibm.wala.shrikeCT

Class LocalVariableTableWriter

java.lang.Object

com.ibm.wala.shrikeCT.ClassWriter.Element

com.ibm.wala.shrikeCT.LocalVariableTableWriter

public final class LocalVariableTableWriter
extends ClassWriter.Element

This class helps emit LocalVariableTable attributes.

Constructor Summary

Constructors

Constructor and Description
LocalVariableTableWriter(ClassWriter w) Create a blank LocalVariableTable.

Method Summary

Modifier and Type	Method and Description
int	copyInto(byte[] buf, int offset) Copy the bytes into 'buf' at offset 'offset'.
int	getSize()
static int[]	makeRawTable(int[][] varMap, Compiler.Output output) Build a raw local variable table from a formatted variable map.
void	setRawTable(int[] table) Set the raw local variable table values.

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalVariableTableWriter

public LocalVariableTableWriter(ClassWriter w)

Create a blank LocalVariableTable.

Throws:

IllegalArgumentException - if w is null

Method Detail

setRawTable

public void setRawTable(int[] table)

Set the raw local variable table values. Consider using LocalVariableTableWriter.makeRawTable to build the raw values.

Parameters:

table - the raw values, a flattened sequence of (startPC, length, nameIndex, typeIndex, var) tuples

getSize

public int getSize()

Specified by:

getSize in class ClassWriter.Element

Returns:

the number of bytes that will be generated.

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

makeRawTable

public static int[] makeRawTable(int[][] varMap,
                                 Compiler.Output output)
                          throws IllegalArgumentException

Build a raw local variable table from a formatted variable map.

Parameters:

varMap - an array mapping bytecode offsets to a variable map for each offset; a variable map is a array of 2*localVars elements, containing a (nameIndex, typeIndex) for each local variable; the pair (0,0) indicates that there is no information about that local variable at that offset

Throws:

IllegalArgumentException - if varMap == null