jmplib.asm.util

Class ASMUtils

java.lang.Object

jmplib.asm.util.ASMUtils

public class ASMUtils
extends java.lang.Object

Helper class to encapsulate the most common ASM operations

Version:

1.1 Code refactoring, simple type - Class map.

Author:

Ignacio Lagartos, Jose Manuel Redondo

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.Map<java.lang.Integer,java.lang.Class<?>>	numericTypes

Constructor Summary

Constructors

Constructor and Description
ASMUtils()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	byteCodeSpy(byte[] bytes) Return the bytecode of the class
static java.lang.String	byteCodeSpy(java.lang.Class<?> clazz) Return the bytecode of the class
static java.lang.String	byteCodeSpy(java.io.InputStream is) Return the bytecode of the class
static java.lang.String	checkClass(byte[] bytes) Check if the class have errors
static int	getAdd(java.lang.String type) Calculates the add opcode from the type descriptor
static org.objectweb.asm.Type[]	getArgumentTypes(org.objectweb.asm.tree.MethodNode methodNode) Return the argument types of the method
static java.lang.String	getASMified(byte[] bytes) Returns the ASMified code of the class
static java.lang.String	getASMified(java.lang.Class<?> clazz) Returns the ASMified code of the class
static java.lang.String	getASMified(java.io.InputStream is) Returns the ASMified code of the class
static java.lang.Class<?>	getClass(org.objectweb.asm.Type type) This method transforms a Type to Class object.
static org.objectweb.asm.tree.ClassNode	getClassNode(byte[] bytes) This method obtain the ClassNode of the given class bytes.
static org.objectweb.asm.tree.ClassNode	getClassNode(java.lang.Class<?> clazz) This method obtain the ClassNode of the given class.
static org.objectweb.asm.tree.ClassNode	getClassNode(java.io.InputStream is) This method obtain the ClassNode from a InputStream.
static org.objectweb.asm.tree.ClassNode	getClassNode(java.lang.String internalName) This method obtain the ClassNode from the internal name of the class .
static int	getConst(java.lang.String type) Calculates the constant opcode from the type descriptor
static void	getConversion(java.lang.String type, org.objectweb.asm.MethodVisitor mv) Adds a conversion instruction whenever the type of the field is byte, char or its wrapper types
static java.lang.String	getDescriptor(java.lang.Class<?> clazz) Obtains the descriptor of the class
static int	getFirstAvailableIndex(java.lang.String methodDesc, int index)
static java.lang.String	getInternalName(java.lang.Class<?> clazz) Obtains the internal name of the class
static int	getMaxStack(org.objectweb.asm.tree.MethodNode methodNode) Return the max stack size for a method
static org.objectweb.asm.tree.MethodInsnNode	getMethodInsnStatic(java.lang.String className, java.lang.String methodName, java.lang.String descriptor) Obtains a static MethodInsnNode
static org.objectweb.asm.tree.VarInsnNode	getParamInsn(org.objectweb.asm.Type type, int number) Create a VarInsnNode from a Type and the index of the parameter
static org.objectweb.asm.tree.InsnNode	getReturnInsn(org.objectweb.asm.tree.MethodNode methodNode) Obtains the return node for one method
static int	getReturnOpcode(java.lang.String methodDesc) Return the return opcode for one method descriptor
static int	getSub(java.lang.String type) Calculates the sub opcode from the type descriptor
static void	getValue(java.lang.String type, org.objectweb.asm.MethodVisitor mv) Adds the instruction to convert the wrapper type to primitive type when the type of the field is a wrapper type
static void	getValueOf(java.lang.String type, org.objectweb.asm.MethodVisitor mv) Adds the instruction to convert the primitive type to wrapper type when the type of the field is a wrapper type
static org.objectweb.asm.tree.InsnList	getVarInsnList(java.lang.String desc) Obtains the InsnList with the load of all parameters of the method.
static org.objectweb.asm.tree.InsnList	getVarInvokerInsnList(java.lang.String desc) Obtains the InsnList with the load of the parameters of the method avoiding the first parameter.
static int	getVarOpcode(java.lang.String varDesc) Obtains the var opcode for a descriptor
static boolean	isStatic(org.objectweb.asm.tree.MethodNode methodNode) Checks of the method is static
static int	nextIndex(int index, java.lang.String desc) Calculates the next index

Methods inherited from class java.lang.Object

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

Field Detail

numericTypes

public static final java.util.Map<java.lang.Integer,java.lang.Class<?>> numericTypes

Constructor Detail

ASMUtils

public ASMUtils()

Method Detail

getClass

public static java.lang.Class<?> getClass(org.objectweb.asm.Type type)

This method transforms a Type to Class object.

Parameters:

type - The Type object to transform.

Returns:

The Class represented by the Type object or null if the type doesn't represent a valid Class.

getClassNode

public static org.objectweb.asm.tree.ClassNode getClassNode(java.lang.Class<?> clazz)

This method obtain the ClassNode of the given class.

Parameters:

clazz - The class which ClassNode have to be returned.

Returns:

The ClassNode of the given class.

getClassNode

public static org.objectweb.asm.tree.ClassNode getClassNode(byte[] bytes)

This method obtain the ClassNode of the given class bytes.

Parameters:

bytes - The class which ClassNode have to be returned.

Returns:

The ClassNode of the given class.

getClassNode

public static org.objectweb.asm.tree.ClassNode getClassNode(java.io.InputStream is)
                                                     throws java.io.IOException

This method obtain the ClassNode from a InputStream.

Parameters:

is - The stream to read the bytes

Returns:

The ClassNode of the given class.

Throws:

java.io.IOException - If there are problems with the stream

getClassNode

public static org.objectweb.asm.tree.ClassNode getClassNode(java.lang.String internalName)
                                                     throws java.io.IOException

This method obtain the ClassNode from the internal name of the class .

Parameters:

internalName - The internal name of the class

Returns:

The ClassNode of the given class.

Throws:

java.io.IOException - If there are problems reading the class

getASMified

public static java.lang.String getASMified(java.lang.Class<?> clazz)

Returns the ASMified code of the class

Parameters:

clazz - The class to ASMified

Returns:

The code to generate the class

getASMified

public static java.lang.String getASMified(byte[] bytes)

Returns the ASMified code of the class

Parameters:

bytes - The bytes of the class to ASMified

Returns:

The code to generate the class

getASMified

public static java.lang.String getASMified(java.io.InputStream is)
                                    throws java.io.IOException

Returns the ASMified code of the class

Parameters:

is - The InputStream to read the bytes of the class to ASMified

Returns:

The code to generate the class

Throws:

java.io.IOException

byteCodeSpy

public static java.lang.String byteCodeSpy(java.lang.Class<?> clazz)

Return the bytecode of the class

Parameters:

clazz - The class to obtain the bytecode

Returns:

The bytecode of the class

byteCodeSpy

public static java.lang.String byteCodeSpy(byte[] bytes)

Return the bytecode of the class

Parameters:

bytes - The bytes of the class to obtain the bytecode

Returns:

The bytecode of the class

byteCodeSpy

public static java.lang.String byteCodeSpy(java.io.InputStream is)
                                    throws java.io.IOException

Return the bytecode of the class

Parameters:

is - The InputStream to read the bytes of the class to obtain the bytecode

Returns:

The bytecode of the class

Throws:

java.io.IOException

getMaxStack

public static int getMaxStack(org.objectweb.asm.tree.MethodNode methodNode)

Return the max stack size for a method

Parameters:

methodNode - Method to calculate max stack

Returns:

The max stack of the method

getArgumentTypes

public static org.objectweb.asm.Type[] getArgumentTypes(org.objectweb.asm.tree.MethodNode methodNode)

Return the argument types of the method

Parameters:

methodNode - The method node

Returns:

The argument types

getParamInsn

public static org.objectweb.asm.tree.VarInsnNode getParamInsn(org.objectweb.asm.Type type,
                                                              int number)

Create a VarInsnNode from a Type and the index of the parameter

Parameters:

type - Type of the var

number - Index of the var

Returns:

The VarInsnNode

getMethodInsnStatic

public static org.objectweb.asm.tree.MethodInsnNode getMethodInsnStatic(java.lang.String className,
                                                                        java.lang.String methodName,
                                                                        java.lang.String descriptor)

Obtains a static MethodInsnNode

Parameters:

className - The internal name class that owns the method

methodName - The name of the method

descriptor - The descriptor of the method

Returns:

The node of the static call

getReturnInsn

public static org.objectweb.asm.tree.InsnNode getReturnInsn(org.objectweb.asm.tree.MethodNode methodNode)

Obtains the return node for one method

Parameters:

methodNode - The method node

Returns:

The return node

isStatic

public static boolean isStatic(org.objectweb.asm.tree.MethodNode methodNode)

Checks of the method is static

Parameters:

methodNode - The method

Returns:

return if it is static

getDescriptor

public static java.lang.String getDescriptor(java.lang.Class<?> clazz)

Obtains the descriptor of the class

Parameters:

clazz - The class

Returns:

The descriptor of the class

getInternalName

public static java.lang.String getInternalName(java.lang.Class<?> clazz)

Obtains the internal name of the class

Parameters:

clazz - The class

Returns:

The internal name of the class

getReturnOpcode

public static int getReturnOpcode(java.lang.String methodDesc)

Return the return opcode for one method descriptor

Parameters:

methodDesc - Method descriptor

Returns:

The return opcode

getVarOpcode

public static int getVarOpcode(java.lang.String varDesc)

Obtains the var opcode for a descriptor

Parameters:

varDesc - Descriptor of the var

Returns:

The opcode

getVarInsnList

public static org.objectweb.asm.tree.InsnList getVarInsnList(java.lang.String desc)

Obtains the InsnList with the load of all parameters of the method.

Parameters:

desc - Descriptor of the method

Returns:

The list with the VarInsnNode of the parameters

getVarInvokerInsnList

public static org.objectweb.asm.tree.InsnList getVarInvokerInsnList(java.lang.String desc)

Obtains the InsnList with the load of the parameters of the method avoiding the first parameter.

Parameters:

desc - The descriptor of the method

Returns:

The list with the VarInsnNode of the parameters

nextIndex

public static int nextIndex(int index,
                            java.lang.String desc)

Calculates the next index

Parameters:

index - Actual index

desc - Descriptor of the actual variable

Returns:

The next index

checkClass

public static java.lang.String checkClass(byte[] bytes)

Check if the class have errors

Parameters:

bytes - Bytes of the class

Returns:

Errores found

getFirstAvailableIndex

public static int getFirstAvailableIndex(java.lang.String methodDesc,
                                         int index)

Parameters:

methodDesc -

index -

Returns:

getValueOf

public static void getValueOf(java.lang.String type,
                              org.objectweb.asm.MethodVisitor mv)

Adds the instruction to convert the primitive type to wrapper type when the type of the field is a wrapper type

Parameters:

type - The type of the field

mv - The method where the instruction is added

getAdd

public static int getAdd(java.lang.String type)

Calculates the add opcode from the type descriptor

Parameters:

type - The descriptor of the type

Returns:

The add opcode

getSub

public static int getSub(java.lang.String type)

Calculates the sub opcode from the type descriptor

Parameters:

type - The descriptor of the type

Returns:

The sub opcode

getConst

public static int getConst(java.lang.String type)

Calculates the constant opcode from the type descriptor

Parameters:

type - The descriptor of the type

Returns:

The constant opcode

getConversion

public static void getConversion(java.lang.String type,
                                 org.objectweb.asm.MethodVisitor mv)

Adds a conversion instruction whenever the type of the field is byte, char or its wrapper types

Parameters:

type - The descriptor of the field

mv - The method to set conversion instruction

getValue

public static void getValue(java.lang.String type,
                            org.objectweb.asm.MethodVisitor mv)

Adds the instruction to convert the wrapper type to primitive type when the type of the field is a wrapper type

Parameters:

type - The type of the field

mv - The method where the instruction is added