classUtils.javassist.bytecode
Class Bytecode

java.lang.Object
  classUtils.javassist.bytecode.Bytecode

All Implemented Interfaces:

Opcode

public class Bytecode
extends java.lang.Object
implements Opcode

A utility class for producing a bytecode sequence.

A Bytecode object is an unbounded array containing bytecode. For example,

ConstPool cp = ...;    // constant pool table
 Bytecode b = new Bytecode(cp, 1, 0);
 b.addIconst(3);
 b.addReturn(CtClass.intType);
 CodeAttribute ca = b.toCodeAttribute();

This program produces a Code attribute including a bytecode sequence:

iconst_3
 ireturn

See Also:

ConstPool, CodeAttribute

Field Summary

static CompileTimeClass

THIS Represents the CtClass file using the constant pool table given to this Bytecode object.

Fields inherited from interface classUtils.javassist.bytecode.Opcode

AALOAD, AASTORE, ACONST_NULL, ALOAD, ALOAD_0, ALOAD_1, ALOAD_2, ALOAD_3, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ASTORE_0, ASTORE_1, ASTORE_2, ASTORE_3, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DLOAD_0, DLOAD_1, DLOAD_2, DLOAD_3, DMUL, DNEG, DREM, DRETURN, DSTORE, DSTORE_0, DSTORE_1, DSTORE_2, DSTORE_3, 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, FLOAD_0, FLOAD_1, FLOAD_2, FLOAD_3, FMUL, FNEG, FREM, FRETURN, FSTORE, FSTORE_0, FSTORE_1, FSTORE_2, FSTORE_3, FSUB, GETFIELD, GETSTATIC, GOTO, GOTO_W, 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, ILOAD_0, ILOAD_1, ILOAD_2, ILOAD_3, IMUL, INEG, INSTANCEOF, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISTORE_0, ISTORE_1, ISTORE_2, ISTORE_3, ISUB, IUSHR, IXOR, JSR, JSR_W, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDC_W, LDC2_W, LDIV, LLOAD, LLOAD_0, LLOAD_1, LLOAD_2, LLOAD_3, LMUL, LNEG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSTORE_0, LSTORE_1, LSTORE_2, LSTORE_3, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, STACK_GROW, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, WIDE

Constructor Summary

Bytecode(ConstPool cp, int stacksize, int localvars)
Constructs a Bytecode object with an empty bytecode sequence.

Method Summary

void	add(int code) Appends an 8bit value to the end of the bytecode sequence.
void	addAload(int n) Appends ALOAD or (WIDE) ALOAD_<n>
void	addAnewarray(CompileTimeClass clazz, int length) Appends ICONST and ANEWARRAY.
void	addAnewarray(java.lang.String classname) Appends ANEWARRAY.
void	addAstore(int n) Appends ASTORE or (WIDE) ASTORE_<n>
void	addCheckcast(CompileTimeClass c) Appends CHECKCAST.
void	addCheckcast(java.lang.String classname) Appends CHECKCAST.
void	addDconst(double d) Appends DCONST or DCONST_<n>
void	addDload(int n) Appends DLOAD or (WIDE) DLOAD_<n>
void	addDstore(int n) Appends DSTORE or (WIDE) DSTORE_<n>
void	addExceptionHandler(int start, int end, int handler, CompileTimeClass type) Adds a new entry of exception_table.
void	addExceptionHandler(int start, int end, int handler, int type) Adds a new entry of exception_table.
void	addFconst(float f) Appends FCONST or FCONST_<n>
void	addFload(int n) Appends FLOAD or (WIDE) FLOAD_<n>
void	addFstore(int n) Appends FSTORE or FSTORE_<n>
void	addGetfield(CompileTimeClass c, java.lang.String name, java.lang.String type) Appends GETFIELD.
void	addGetstatic(CompileTimeClass c, java.lang.String name, java.lang.String type) Appends GETSTATIC.
void	addGetstatic(java.lang.String c, java.lang.String name, java.lang.String type) Appends GETSTATIC.
void	addIconst(int n) Appends ICONST or ICONST_<n>
void	addIload(int n) Appends ILOAD or (WIDE) ILOAD_<n>
void	addIndex(int index) Appends a 16bit value to the end of the bytecode sequence.
void	addInstanceof(java.lang.String classname) Appends INSTANCEOF.
void	addInvokeinterface(CompileTimeClass clazz, java.lang.String name, CompileTimeClass returnType, CompileTimeClass[] paramTypes, int count) Appends INVOKEINTERFACE.
void	addInvokeinterface(CompileTimeClass clazz, java.lang.String name, java.lang.String desc, int count) Appends INVOKEINTERFACE.
void	addInvokeinterface(int clazz, java.lang.String name, java.lang.String desc, int count) Appends INVOKEINTERFACE.
void	addInvokeinterface(java.lang.String classname, java.lang.String name, java.lang.String desc, int count) Appends INVOKEINTERFACE.
void	addInvokespecial(CompileTimeClass clazz, java.lang.String name, CompileTimeClass returnType, CompileTimeClass[] paramTypes) Appends INVOKESPECIAL.
void	addInvokespecial(CompileTimeClass clazz, java.lang.String name, java.lang.String desc) Appends INVOKESPECIAL.
void	addInvokespecial(int clazz, java.lang.String name, java.lang.String desc) Appends INVOKESPECIAL.
void	addInvokespecial(java.lang.String clazz, java.lang.String name, java.lang.String desc) Appends INVOKESPECIAL.
void	addInvokestatic(CompileTimeClass clazz, java.lang.String name, CompileTimeClass returnType, CompileTimeClass[] paramTypes) Appends INVOKESTATIC.
void	addInvokestatic(CompileTimeClass clazz, java.lang.String name, java.lang.String desc) Appends INVOKESTATIC.
void	addInvokestatic(int clazz, java.lang.String name, java.lang.String desc) Appends INVOKESTATIC.
void	addInvokestatic(java.lang.String classname, java.lang.String name, java.lang.String desc) Appends INVOKESTATIC.
void	addInvokevirtual(CompileTimeClass clazz, java.lang.String name, CompileTimeClass returnType, CompileTimeClass[] paramTypes) Appends INVOKEVIRTUAL.
void	addInvokevirtual(CompileTimeClass clazz, java.lang.String name, java.lang.String desc) Appends INVOKEVIRTUAL.
void	addInvokevirtual(int clazz, java.lang.String name, java.lang.String desc) Appends INVOKEVIRTUAL.
void	addInvokevirtual(java.lang.String classname, java.lang.String name, java.lang.String desc) Appends INVOKEVIRTUAL.
void	addIstore(int n) Appends ISTORE or (WIDE) ISTORE_<n>
void	addLconst(long n) Appends LCONST or LCONST_<n>
void	addLdc(int i) Appends LDC or LDC_W.
void	addLdc(java.lang.String s) Appends LDC or LDC_W.
void	addLdc2w(double d) Appends LDC2_W.
void	addLdc2w(long l) Appends LDC2_W.
void	addLload(int n) Appends LLOAD or (WIDE) LLOAD_<n>
int	addLoad(int n, CompileTimeClass type) Appends an instruction for loading a value from the local variable affineTransform the index n.
int	addLoadParameters(CompileTimeClass[] params, int offset) Appends instructions for loading all the parameters onto the operand stack.
void	addLstore(int n) Appends LSTORE or LSTORE_<n>
int	addMultiNewarray(CompileTimeClass clazz, int dim) Appends MULTINEWARRAY.
int	addMultiNewarray(CompileTimeClass clazz, int[] dimensions) Appends MULTINEWARRAY.
int	addMultiNewarray(java.lang.String desc, int dim) Appends MULTINEWARRAY.
void	addNew(CompileTimeClass clazz) Appends NEW.
void	addNew(java.lang.String classname) Appends NEW.
void	addNewarray(int atype, int length) Appends NEWARRAY for primitive types.
void	addOpcode(int code) Appends an 8bit opcode to the end of the bytecode sequence.
void	addPrintln(java.lang.String message) Appends instructions for executing java.lang.System.println(message).
void	addPutfield(CompileTimeClass c, java.lang.String name, java.lang.String desc) Appends PUTFIELD.
void	addPutstatic(CompileTimeClass c, java.lang.String name, java.lang.String desc) Appends PUTSTATIC.
void	addRet(int var) Appends RET.
void	addReturn(CompileTimeClass type) Appends ARETURN, IRETURN, .., or RETURN.
int	addStore(int n, CompileTimeClass type) Appends an instruction for storing a value into the local variable affineTransform the index n.
int	currentPc() Returns the length of bytecode sequence that have been added so far.
byte[]	get() Returns the produced bytecode sequence.
ConstPool	getConstPool() Gets a constant pool table.
ExceptionTable	getExceptionTable() Returns exception_table.
int	getMaxLocals() Gets max_locals.
int	getMaxStack() Gets max_stack.
int	getStackDepth() Returns the current stack depth.
void	growStack(int diff) Increases the current stack depth.
void	incMaxLocals(int diff) Increments max_locals.
int	length() Returns the length of the bytecode sequence.
int	read(int offset) Reads a signed 8bit value affineTransform the offset from the beginning of the bytecode sequence.
int	read16bit(int offset) Reads a signed 16bit value affineTransform the offset from the beginning of the bytecode sequence.
void	setMaxLocals(boolean isStatic, CompileTimeClass[] params, int locals) Sets max_locals.
void	setMaxLocals(int size) Sets max_locals.
void	setMaxStack(int size) Sets max_stack.
void	setStackDepth(int depth) Sets the current stack depth.
CodeAttribute	toCodeAttribute() Converts to a CodeAttribute.
void	write(int offset, int value) Writes an 8bit value affineTransform the offset from the beginning of the bytecode sequence.
void	write16bit(int offset, int value) Writes an 16bit value affineTransform the offset from the beginning of the bytecode sequence.

Methods inherited from class java.lang.Object

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

Field Detail

THIS

public static final CompileTimeClass THIS

Represents the CtClass file using the constant pool table given to this Bytecode object.

Constructor Detail

Bytecode

public Bytecode(ConstPool cp,
                int stacksize,
                int localvars)

Constructs a Bytecode object with an empty bytecode sequence.

The parameters stacksize and localvars specify initial values of max_stack and max_locals. They can be changed later.

Parameters:

cp - constant pool table.

stacksize - max_stack.

localvars - max_locals.

Method Detail

getConstPool

public ConstPool getConstPool()

Gets a constant pool table.

getExceptionTable

public ExceptionTable getExceptionTable()

Returns exception_table.

toCodeAttribute

public CodeAttribute toCodeAttribute()

Converts to a CodeAttribute.

length

public int length()

Returns the length of the bytecode sequence.

get

public byte[] get()

Returns the produced bytecode sequence.

getMaxStack

public int getMaxStack()

Gets max_stack.

setMaxStack

public void setMaxStack(int size)

Sets max_stack.

This value may be automatically updated when an instruction is appended. A Bytecode object maintains the current stack depth whenever an instruction is added by addOpcode(). For example, if DUP is appended, the current stack depth is increased by one. If the new stack depth is more than max_stack, then it is assigned to max_stack. However, if branch instructions are appended, the current stack depth may not be correctly maintained.

See Also:

addOpcode(int)

getMaxLocals

public int getMaxLocals()

Gets max_locals.

setMaxLocals

public void setMaxLocals(int size)

Sets max_locals.

setMaxLocals

public void setMaxLocals(boolean isStatic,
                         CompileTimeClass[] params,
                         int locals)

Sets max_locals.

This computes the number of local variables used to pass method parameters and sets max_locals to that number plus locals.

Parameters:

isStatic - true if params must be interpreted as parameters to a static method.

params - parameter types.

locals - the number of local variables excluding ones used to pass parameters.

incMaxLocals

public void incMaxLocals(int diff)

Increments max_locals.

addExceptionHandler

public void addExceptionHandler(int start,
                                int end,
                                int handler,
                                CompileTimeClass type)

Adds a new entry of exception_table.

addExceptionHandler

public void addExceptionHandler(int start,
                                int end,
                                int handler,
                                int type)

Adds a new entry of exception_table.

currentPc

public int currentPc()

Returns the length of bytecode sequence that have been added so far.

read

public int read(int offset)

Reads a signed 8bit value affineTransform the offset from the beginning of the bytecode sequence.

Throws:

java.lang.ArrayIndexOutOfBoundsException - if offset is invalid.

read16bit

public int read16bit(int offset)

Reads a signed 16bit value affineTransform the offset from the beginning of the bytecode sequence.

write

public void write(int offset,
                  int value)

Writes an 8bit value affineTransform the offset from the beginning of the bytecode sequence.

Throws:

java.lang.ArrayIndexOutOfBoundsException - if offset is invalid.

write16bit

public void write16bit(int offset,
                       int value)

Writes an 16bit value affineTransform the offset from the beginning of the bytecode sequence.

add

public void add(int code)

Appends an 8bit value to the end of the bytecode sequence.

addOpcode

public void addOpcode(int code)

Appends an 8bit opcode to the end of the bytecode sequence. The current stack depth is updated. max_stack is updated if the current stack depth is the deepest so far.

Note: some instructions such as INVOKEVIRTUAL does not update the current stack depth since the increment depends on the method signature. growStack() must be explicitly called.

growStack

public void growStack(int diff)

Increases the current stack depth. It also updates max_stack if the current stack depth is the deepest so far.

Parameters:

diff - the number added to the current stack depth.

getStackDepth

public int getStackDepth()

Returns the current stack depth.

setStackDepth

public void setStackDepth(int depth)

Sets the current stack depth. It also updates max_stack if the current stack depth is the deepest so far.

Parameters:

depth - new value.

addIndex

public void addIndex(int index)

Appends a 16bit value to the end of the bytecode sequence. It never changes the current stack depth.

addAload

public void addAload(int n)

Appends ALOAD or (WIDE) ALOAD_<n>

Parameters:

n - an index into the local variable array.

addAstore

public void addAstore(int n)

Appends ASTORE or (WIDE) ASTORE_<n>

Parameters:

n - an index into the local variable array.

addIconst

public void addIconst(int n)

Appends ICONST or ICONST_<n>

Parameters:

n - the pushed integer constant.

addIload

public void addIload(int n)

Appends ILOAD or (WIDE) ILOAD_<n>

Parameters:

n - an index into the local variable array.

addIstore

public void addIstore(int n)

Appends ISTORE or (WIDE) ISTORE_<n>

Parameters:

n - an index into the local variable array.

addLconst

public void addLconst(long n)

Appends LCONST or LCONST_<n>

Parameters:

n - the pushed long integer constant.

addLload

public void addLload(int n)

Appends LLOAD or (WIDE) LLOAD_<n>

Parameters:

n - an index into the local variable array.

addLstore

public void addLstore(int n)

Appends LSTORE or LSTORE_<n>

Parameters:

n - an index into the local variable array.

addDconst

public void addDconst(double d)

Appends DCONST or DCONST_<n>

Parameters:

d - the pushed double constant.

addDload

public void addDload(int n)

Appends DLOAD or (WIDE) DLOAD_<n>

Parameters:

n - an index into the local variable array.

addDstore

public void addDstore(int n)

Appends DSTORE or (WIDE) DSTORE_<n>

Parameters:

n - an index into the local variable array.

addFconst

public void addFconst(float f)

Appends FCONST or FCONST_<n>

Parameters:

f - the pushed float constant.

addFload

public void addFload(int n)

Appends FLOAD or (WIDE) FLOAD_<n>

Parameters:

n - an index into the local variable array.

addFstore

public void addFstore(int n)

Appends FSTORE or FSTORE_<n>

Parameters:

n - an index into the local variable array.

addLoad

public int addLoad(int n,
                   CompileTimeClass type)

Appends an instruction for loading a value from the local variable affineTransform the index n.

Parameters:

n - the index.

type - the type of the loaded value.

Returns:

the size of the value (1 or 2 word).

addStore

public int addStore(int n,
                    CompileTimeClass type)

Appends an instruction for storing a value into the local variable affineTransform the index n.

Parameters:

n - the index.

type - the type of the stored value.

Returns:

2 if the type is long or double. Otherwise 1.

addLoadParameters

public int addLoadParameters(CompileTimeClass[] params,
                             int offset)

Appends instructions for loading all the parameters onto the operand stack.

Parameters:

offset - the index of the first parameter. It is 0 if the method is static. Otherwise, it is 1.

addCheckcast

public void addCheckcast(CompileTimeClass c)

Appends CHECKCAST.

Parameters:

c - the type.

addCheckcast

public void addCheckcast(java.lang.String classname)

Appends CHECKCAST.

Parameters:

classname - a fully-qualified class name.

addInstanceof

public void addInstanceof(java.lang.String classname)

Appends INSTANCEOF.

Parameters:

classname - the class name.

addGetfield

public void addGetfield(CompileTimeClass c,
                        java.lang.String name,
                        java.lang.String type)

Appends GETFIELD.

Parameters:

c - the class

name - the field name

type - the descriptor of the field type.

See Also:

Descriptor.of(CompileTimeClass)

addGetstatic

public void addGetstatic(CompileTimeClass c,
                         java.lang.String name,
                         java.lang.String type)

Appends GETSTATIC.

Parameters:

c - the class

name - the field name

type - the descriptor of the field type.

See Also:

Descriptor.of(CompileTimeClass)

addGetstatic

public void addGetstatic(java.lang.String c,
                         java.lang.String name,
                         java.lang.String type)

Appends GETSTATIC.

Parameters:

c - the fully-qualified class name

name - the field name

type - the descriptor of the field type.

See Also:

Descriptor.of(CompileTimeClass)

addInvokespecial

public void addInvokespecial(CompileTimeClass clazz,
                             java.lang.String name,
                             CompileTimeClass returnType,
                             CompileTimeClass[] paramTypes)

Appends INVOKESPECIAL.

Parameters:

clazz - the target class.

name - the method name.

returnType - the return type.

paramTypes - the parameter types.

addInvokespecial

public void addInvokespecial(CompileTimeClass clazz,
                             java.lang.String name,
                             java.lang.String desc)

Appends INVOKESPECIAL.

Parameters:

clazz - the target class.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[]), Descriptor.ofConstructor(CompileTimeClass[])

addInvokespecial

public void addInvokespecial(java.lang.String clazz,
                             java.lang.String name,
                             java.lang.String desc)

Appends INVOKESPECIAL.

Parameters:

clazz - the fully-qualified class name.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[]), Descriptor.ofConstructor(CompileTimeClass[])

addInvokespecial

public void addInvokespecial(int clazz,
                             java.lang.String name,
                             java.lang.String desc)

Appends INVOKESPECIAL.

Parameters:

clazz - the index of CONSTANT_Class_info structure.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[]), Descriptor.ofConstructor(CompileTimeClass[])

addInvokestatic

public void addInvokestatic(CompileTimeClass clazz,
                            java.lang.String name,
                            CompileTimeClass returnType,
                            CompileTimeClass[] paramTypes)

Appends INVOKESTATIC.

Parameters:

clazz - the target class.

name - the method name

returnType - the return type.

paramTypes - the parameter types.

addInvokestatic

public void addInvokestatic(CompileTimeClass clazz,
                            java.lang.String name,
                            java.lang.String desc)

Appends INVOKESTATIC.

Parameters:

clazz - the target class.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokestatic

public void addInvokestatic(java.lang.String classname,
                            java.lang.String name,
                            java.lang.String desc)

Appends INVOKESTATIC.

Parameters:

classname - the fully-qualified class name.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokestatic

public void addInvokestatic(int clazz,
                            java.lang.String name,
                            java.lang.String desc)

Appends INVOKESTATIC.

Parameters:

clazz - the index of CONSTANT_Class_info structure.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokevirtual

public void addInvokevirtual(CompileTimeClass clazz,
                             java.lang.String name,
                             CompileTimeClass returnType,
                             CompileTimeClass[] paramTypes)

Appends INVOKEVIRTUAL.

The specified method must not be an inherited method. It must be directly declared in the class specified in clazz.

Parameters:

clazz - the target class.

name - the method name

returnType - the return type.

paramTypes - the parameter types.

addInvokevirtual

public void addInvokevirtual(CompileTimeClass clazz,
                             java.lang.String name,
                             java.lang.String desc)

Appends INVOKEVIRTUAL.

The specified method must not be an inherited method. It must be directly declared in the class specified in clazz.

Parameters:

clazz - the target class.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokevirtual

public void addInvokevirtual(java.lang.String classname,
                             java.lang.String name,
                             java.lang.String desc)

Appends INVOKEVIRTUAL.

The specified method must not be an inherited method. It must be directly declared in the class specified in classname.

Parameters:

classname - the fully-qualified class name.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokevirtual

public void addInvokevirtual(int clazz,
                             java.lang.String name,
                             java.lang.String desc)

Appends INVOKEVIRTUAL.

The specified method must not be an inherited method. It must be directly declared in the class specified by clazz.

Parameters:

clazz - the index of CONSTANT_Class_info structure.

name - the method name

desc - the descriptor of the method signature.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokeinterface

public void addInvokeinterface(CompileTimeClass clazz,
                               java.lang.String name,
                               CompileTimeClass returnType,
                               CompileTimeClass[] paramTypes,
                               int count)

Appends INVOKEINTERFACE.

Parameters:

clazz - the target class.

name - the method name

returnType - the return type.

paramTypes - the parameter types.

count - the count operand of the instruction.

addInvokeinterface

public void addInvokeinterface(CompileTimeClass clazz,
                               java.lang.String name,
                               java.lang.String desc,
                               int count)

Appends INVOKEINTERFACE.

Parameters:

clazz - the target class.

name - the method name

desc - the descriptor of the method signature.

count - the count operand of the instruction.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokeinterface

public void addInvokeinterface(java.lang.String classname,
                               java.lang.String name,
                               java.lang.String desc,
                               int count)

Appends INVOKEINTERFACE.

Parameters:

classname - the fully-qualified class name.

name - the method name

desc - the descriptor of the method signature.

count - the count operand of the instruction.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addInvokeinterface

public void addInvokeinterface(int clazz,
                               java.lang.String name,
                               java.lang.String desc,
                               int count)

Appends INVOKEINTERFACE.

Parameters:

clazz - the index of CONSTANT_Class_info structure.

name - the method name

desc - the descriptor of the method signature.

count - the count operand of the instruction.

See Also:

Descriptor.ofMethod(CompileTimeClass,CompileTimeClass[])

addLdc

public void addLdc(java.lang.String s)

Appends LDC or LDC_W. The pushed item is a String object.

Parameters:

s - the character string pushed by LDC or LDC_W.

addLdc

public void addLdc(int i)

Appends LDC or LDC_W.

Parameters:

i - index into the constant pool.

addLdc2w

public void addLdc2w(long l)

Appends LDC2_W. The pushed item is a long value.

addLdc2w

public void addLdc2w(double d)

Appends LDC2_W. The pushed item is a double value.

addNew

public void addNew(CompileTimeClass clazz)

Appends NEW.

Parameters:

clazz - the class of the created instance.

addNew

public void addNew(java.lang.String classname)

Appends NEW.

Parameters:

classname - the fully-qualified class name.

addAnewarray

public void addAnewarray(java.lang.String classname)

Appends ANEWARRAY.

Parameters:

classname - the qualified class name of the element type.

addAnewarray

public void addAnewarray(CompileTimeClass clazz,
                         int length)

Appends ICONST and ANEWARRAY.

Parameters:

clazz - the elememnt type.

length - the array length.

addNewarray

public void addNewarray(int atype,
                        int length)

Appends NEWARRAY for primitive types.

Parameters:

atype - T_BOOLEAN, T_CHAR, ...

See Also:

Opcode

addMultiNewarray

public int addMultiNewarray(CompileTimeClass clazz,
                            int[] dimensions)

Appends MULTINEWARRAY.

Parameters:

clazz - the array type.

dimensions - the sizes of all dimensions.

Returns:

the length of dimensions.

addMultiNewarray

public int addMultiNewarray(CompileTimeClass clazz,
                            int dim)

Appends MULTINEWARRAY. The size of every dimension must have been already pushed on the stack.

Parameters:

clazz - the array type.

dim - the number of the dimensions.

Returns:

the value of dim.

addMultiNewarray

public int addMultiNewarray(java.lang.String desc,
                            int dim)

Appends MULTINEWARRAY.

Parameters:

desc - the type descriptor of the created array.

dim - dimensions.

Returns:

the value of dim.

addPutfield

public void addPutfield(CompileTimeClass c,
                        java.lang.String name,
                        java.lang.String desc)

Appends PUTFIELD.

Parameters:

c - the target class.

name - the field name.

desc - the descriptor of the field type.

addPutstatic

public void addPutstatic(CompileTimeClass c,
                         java.lang.String name,
                         java.lang.String desc)

Appends PUTSTATIC.

Parameters:

c - the target class.

name - the field name.

desc - the descriptor of the field type.

addReturn

public void addReturn(CompileTimeClass type)

Appends ARETURN, IRETURN, .., or RETURN.

Parameters:

type - the return type.

addRet

public void addRet(int var)

Appends RET.

Parameters:

var - local variable

addPrintln

public void addPrintln(java.lang.String message)

Appends instructions for executing java.lang.System.println(message).

Parameters:

message - printed message.