net.sf.transjvm.jvm
Class ConstantPool

java.lang.Object
  net.sf.transjvm.jvm.ConstantPool

public class ConstantPool
extends java.lang.Object

Author:

Mark Shannon

Field Summary

int	uniqueID An unique identifier for a ConstantPool.

Constructor Summary

ConstantPool()

Method Summary

int	getClassRef(java.lang.String name) Returns an index for the named class.
int	getClassRef(UTF name) Returns an index for the named class.
int	getDouble(double d) Returns an index for the double d
int	getFieldRef(int classRef, java.lang.String name, UTF descriptor) Returns an index for the specified field.
int	getFloat(float f) Returns an index for the float f
int	getInteger(int i) Returns an index for the integer i
int	getInterfaceMethodRef(int classRef, java.lang.String name, UTF descriptor) Returns an index for the specified interface method.
int	getLong(long l) Returns an index for the long l
int	getMethodRef(int classRef, java.lang.String name, UTF descriptor) Returns an index for the specified method.
int	getString(java.lang.String s) Returns an index for the String s
int	getUtf(java.lang.String s) Returns an UTF index for the String s
int	getUtf(UTF utf) Returns an index for the UTF utf
int	size() The size (in bytes not entries) of this ConstantPool
void	writeTo(byte[] bytes, int offset) Writes this ConstantPool to a byte array starting at offset.

Methods inherited from class java.lang.Object

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

Field Detail

uniqueID

public final int uniqueID

An unique identifier for a ConstantPool. For any two ConstantPools cp1 and cp2: cp1.uniqueID == cp2.uniqueID if and only if cp1 == cp2. Primarily a cheap way for Objects to keep tags on which ConstantPool(s) they have been written to without unintentional object retentions or WeakReferences.

Constructor Detail

ConstantPool

public ConstantPool()

Method Detail

writeTo

public void writeTo(byte[] bytes,
                    int offset)

Writes this ConstantPool to a byte array starting at offset.

Parameters:

bytes - The array to write to.

offset - Offset from start of array to write to.

Throws:

java.lang.ArrayIndexOutOfBoundsException - if size() + offset > bytes.length

size

public int size()

The size (in bytes not entries) of this ConstantPool

getUtf

public int getUtf(java.lang.String s)

Returns an UTF index for the String s

getUtf

public int getUtf(UTF utf)

Returns an index for the UTF utf

getString

public int getString(java.lang.String s)

Returns an index for the String s

getInteger

public int getInteger(int i)

Returns an index for the integer i

getLong

public int getLong(long l)

Returns an index for the long l

getFloat

public int getFloat(float f)

Returns an index for the float f

getDouble

public int getDouble(double d)

Returns an index for the double d

getClassRef

public int getClassRef(java.lang.String name)

Returns an index for the named class.

getClassRef

public int getClassRef(UTF name)

Returns an index for the named class.

getFieldRef

public int getFieldRef(int classRef,
                       java.lang.String name,
                       UTF descriptor)

Returns an index for the specified field.

getMethodRef

public int getMethodRef(int classRef,
                        java.lang.String name,
                        UTF descriptor)

Returns an index for the specified method.

getInterfaceMethodRef

public int getInterfaceMethodRef(int classRef,
                                 java.lang.String name,
                                 UTF descriptor)

Returns an index for the specified interface method.