org.codehaus.groovy.classgen
Class BytecodeHelper

java.lang.Object
  org.codehaus.groovy.classgen.BytecodeHelper

All Implemented Interfaces:

org.objectweb.asm.Opcodes

public class BytecodeHelper
extends Object
implements org.objectweb.asm.Opcodes

A helper class for bytecode generation with AsmClassGenerator.

Version:

$Revision: 11949 $

Author:

James Strachan, Bing Ran, Jochen Theodorou

Field Summary

Fields inherited from interface org.objectweb.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6

Constructor Summary

BytecodeHelper(org.objectweb.asm.MethodVisitor mv)

Method Summary

void	box(Class type) Generates the bytecode to autobox the current value on the stack
void	box(ClassNode type)
void	boxBoolean() convert boolean to Boolean
static ClassNode	boxOnPrimitive(ClassNode type)
void	doCast(Class type)
void	doCast(ClassNode type)
void	doReturn(ClassNode returnType)
void	dup()
static String	formatNameForClassLoading(String name) returns a name that Class.forName() can take.
static String	getClassInternalName(Class t)
static String	getClassInternalName(ClassNode t)
static String	getClassInternalName(String name)
static String[]	getClassInternalNames(ClassNode[] names)
static String	getClassLoadingTypeDescription(ClassNode c) array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'.
static String	getGenericsBounds(ClassNode type)
static String	getGenericsMethodSignature(MethodNode node)
static String	getGenericsSignature(ClassNode node)
static String	getMethodDescriptor(Class returnType, Class[] paramTypes)
static String	getMethodDescriptor(ClassNode returnType, Parameter[] parameters)
org.objectweb.asm.MethodVisitor	getMethodVisitor()
static String	getTypeDescription(Class c)
static String	getTypeDescription(ClassNode c) array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I
void	load(ClassNode type, int idx)
void	load(Variable v)
void	loadVar(Variable variable) load the value of the variable on the operand stack. unbox it if it's a reference
void	mark(String msg) load a message on the stack and remove it right away.
void	negateBoolean() negate a boolean on stack. true->false, false->true
protected void	pushConstant(boolean value)
void	pushConstant(int value)
void	putField(FieldNode fld)
void	putField(FieldNode fld, String ownerName)
void	quickBoxIfNecessary(ClassNode type) box the primitive value on the stack
void	quickUnboxIfNecessary(ClassNode type)
void	store(Variable v)
void	store(Variable v, boolean markStart)
void	storeVar(Variable variable)
void	swapObjectWith(ClassNode type)
void	swapWithObject(ClassNode type)
void	unbox(Class type) Generates the bytecode to unbox the current value on the stack
void	unbox(ClassNode type)

Methods inherited from class java.lang.Object

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

Constructor Detail

BytecodeHelper

public BytecodeHelper(org.objectweb.asm.MethodVisitor mv)

Method Detail

getMethodVisitor

public org.objectweb.asm.MethodVisitor getMethodVisitor()

quickBoxIfNecessary

public void quickBoxIfNecessary(ClassNode type)

box the primitive value on the stack

Parameters:

type -

quickUnboxIfNecessary

public void quickUnboxIfNecessary(ClassNode type)

box

public void box(Class type)

Generates the bytecode to autobox the current value on the stack

box

public void box(ClassNode type)

unbox

public void unbox(Class type)

Generates the bytecode to unbox the current value on the stack

unbox

public void unbox(ClassNode type)

getClassInternalName

public static String getClassInternalName(ClassNode t)

getClassInternalName

public static String getClassInternalName(Class t)

getClassInternalName

public static String getClassInternalName(String name)

Returns:

the ASM internal name of the type

getMethodDescriptor

public static String getMethodDescriptor(ClassNode returnType,
                                         Parameter[] parameters)

Returns:

the ASM method type descriptor

getMethodDescriptor

public static String getMethodDescriptor(Class returnType,
                                         Class[] paramTypes)

Returns:

the ASM method type descriptor

getTypeDescription

public static String getTypeDescription(Class c)

getClassLoadingTypeDescription

public static String getClassLoadingTypeDescription(ClassNode c)

array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'. it seems that makes problems for the class loading if '.' is replaced by '/'

Returns:

the ASM type description for class loading

getTypeDescription

public static String getTypeDescription(ClassNode c)

array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I

Returns:

the ASM type description

getClassInternalNames

public static String[] getClassInternalNames(ClassNode[] names)

Returns:

an array of ASM internal names of the type

pushConstant

protected void pushConstant(boolean value)

pushConstant

public void pushConstant(int value)

doCast

public void doCast(Class type)

doCast

public void doCast(ClassNode type)

load

public void load(ClassNode type,
                 int idx)

load

public void load(Variable v)

store

public void store(Variable v,
                  boolean markStart)

store

public void store(Variable v)

loadVar

public void loadVar(Variable variable)

load the value of the variable on the operand stack. unbox it if it's a reference

Parameters:

variable -

storeVar

public void storeVar(Variable variable)

putField

public void putField(FieldNode fld)

putField

public void putField(FieldNode fld,
                     String ownerName)

swapObjectWith

public void swapObjectWith(ClassNode type)

swapWithObject

public void swapWithObject(ClassNode type)

boxOnPrimitive

public static ClassNode boxOnPrimitive(ClassNode type)

boxBoolean

public void boxBoolean()

convert boolean to Boolean

negateBoolean

public void negateBoolean()

negate a boolean on stack. true->false, false->true

mark

public void mark(String msg)

load a message on the stack and remove it right away. Good for put a mark in the generated bytecode for debugging purpose.

Parameters:

msg -

formatNameForClassLoading

public static String formatNameForClassLoading(String name)

returns a name that Class.forName() can take. Notablely for arrays: [I, [Ljava.lang.String; etc Regular object type: java.lang.String

Parameters:

name -

dup

public void dup()

doReturn

public void doReturn(ClassNode returnType)

getGenericsMethodSignature

public static String getGenericsMethodSignature(MethodNode node)

getGenericsSignature

public static String getGenericsSignature(ClassNode node)

getGenericsBounds

public static String getGenericsBounds(ClassNode type)