at.dms.classfile
Class FieldRefInstruction

java.lang.Object
  |
  +--at.dms.classfile.AbstractInstructionAccessor
        |
        +--at.dms.classfile.Instruction
              |
              +--at.dms.classfile.FieldRefInstruction
All Implemented Interfaces:
Constants, InstructionAccessor

public class FieldRefInstruction
extends Instruction

Instructions thar refers to class fields. opc_getstatic, opc_putstatic, opc_getfield, opc_putfield


Fields inherited from interface at.dms.classfile.Constants
ACC_ABSTRACT, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_NBR_FLAGS, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_TRANSIENT, ACC_VOLATILE, ATT_CODE, ATT_CONSTANTVALUE, ATT_DEPRECATED, ATT_EXCEPTIONS, ATT_GENERIC, ATT_INNERCLASSES, ATT_LINENUMBERTABLE, ATT_LOCALVARIABLETABLE, ATT_SOURCEFILE, ATT_SYNTHETIC, CST_CLASS, CST_DOUBLE, CST_FIELD, CST_FLOAT, CST_INTEGER, CST_INTERFACEMETHOD, CST_LONG, CST_METHOD, CST_NAMEANDTYPE, CST_STRING, CST_UTF8, ENV_DEBUG_MODE, ENV_USE_CACHE, JAVA_MAGIC, JAVA_MAJOR, JAVA_MINOR, MAX_CODE_PER_METHOD, opc_aaload, opc_aastore, opc_aconst_null, opc_aload, opc_aload_0, opc_aload_1, opc_aload_2, opc_aload_3, opc_anewarray, opc_areturn, opc_arraylength, opc_astore, opc_astore_0, opc_astore_1, opc_astore_2, opc_astore_3, opc_athrow, opc_baload, opc_bastore, opc_bipush, opc_caload, opc_castore, opc_checkcast, opc_d2f, opc_d2i, opc_d2l, opc_dadd, opc_daload, opc_dastore, opc_dcmpg, opc_dcmpl, opc_dconst_0, opc_dconst_1, opc_ddiv, opc_dload, opc_dload_0, opc_dload_1, opc_dload_2, opc_dload_3, opc_dmul, opc_dneg, opc_drem, opc_dreturn, opc_dstore, opc_dstore_0, opc_dstore_1, opc_dstore_2, opc_dstore_3, opc_dsub, opc_dup, opc_dup_x1, opc_dup_x2, opc_dup2, opc_dup2_x1, opc_dup2_x2, opc_f2d, opc_f2i, opc_f2l, opc_fadd, opc_faload, opc_fastore, opc_fcmpg, opc_fcmpl, opc_fconst_0, opc_fconst_1, opc_fconst_2, opc_fdiv, opc_fload, opc_fload_0, opc_fload_1, opc_fload_2, opc_fload_3, opc_fmul, opc_fneg, opc_frem, opc_freturn, opc_fstore, opc_fstore_0, opc_fstore_1, opc_fstore_2, opc_fstore_3, opc_fsub, opc_getfield, opc_getstatic, opc_goto, opc_goto_w, opc_i2b, opc_i2c, opc_i2d, opc_i2f, opc_i2l, opc_i2s, opc_iadd, opc_iaload, opc_iand, opc_iastore, opc_iconst_0, opc_iconst_1, opc_iconst_2, opc_iconst_3, opc_iconst_4, opc_iconst_5, opc_iconst_m1, opc_idiv, opc_if_acmpeq, opc_if_acmpne, opc_if_icmpeq, opc_if_icmpge, opc_if_icmpgt, opc_if_icmple, opc_if_icmplt, opc_if_icmpne, opc_ifeq, opc_ifge, opc_ifgt, opc_ifle, opc_iflt, opc_ifne, opc_ifnonnull, opc_ifnull, opc_iinc, opc_iload, opc_iload_0, opc_iload_1, opc_iload_2, opc_iload_3, opc_imul, opc_ineg, opc_instanceof, opc_invokeinterface, opc_invokespecial, opc_invokestatic, opc_invokevirtual, opc_ior, opc_irem, opc_ireturn, opc_ishl, opc_ishr, opc_istore, opc_istore_0, opc_istore_1, opc_istore_2, opc_istore_3, opc_isub, opc_iushr, opc_ixor, opc_jsr, opc_jsr_w, opc_l2d, opc_l2f, opc_l2i, opc_ladd, opc_laload, opc_land, opc_lastore, opc_lcmp, opc_lconst_0, opc_lconst_1, opc_ldc, opc_ldc_w, opc_ldc2_w, opc_ldiv, opc_lload, opc_lload_0, opc_lload_1, opc_lload_2, opc_lload_3, opc_lmul, opc_lneg, opc_lookupswitch, opc_lor, opc_lrem, opc_lreturn, opc_lshl, opc_lshr, opc_lstore, opc_lstore_0, opc_lstore_1, opc_lstore_2, opc_lstore_3, opc_lsub, opc_lushr, opc_lxor, opc_monitorenter, opc_monitorexit, opc_multianewarray, opc_new, opc_newarray, opc_nop, opc_pop, opc_pop2, opc_putfield, opc_putstatic, opc_ret, opc_return, opc_saload, opc_sastore, opc_sipush, opc_swap, opc_tableswitch, opc_wide, opc_xxxunusedxxx, POO_ASCII_CONSTANT, POO_CLASS_CONSTANT, POO_DOUBLE_CONSTANT, POO_FLOAT_CONSTANT, POO_INTEGER_CONSTANT, POO_LONG_CONSTANT, POO_NAT_CONSTANT, POO_REF_CONSTANT, POO_STRING_CONSTANT, TYP_ADDRESS, TYP_DOUBLE, TYP_FLOAT, TYP_INT, TYP_LONG, TYP_REFERENCE, TYP_VOID
 
Constructor Summary
FieldRefInstruction(int opcode, FieldRefConstant field)
          Constructs a new field reference instruction from a class file.
FieldRefInstruction(int opcode, java.lang.String name, java.lang.String type)
          Constructs a new field reference instruction.
FieldRefInstruction(int opcode, java.lang.String owner, java.lang.String name, java.lang.String type)
          Constructs a new field reference instruction.
 
Method Summary
 boolean canComplete()
          Returns true iff control flow can reach the next instruction in textual order.
 FieldRefConstant getFieldRefConstant()
          Returns the field constant on which this expression refers itself.
 int getPushedOnStack()
          Returns the size of data pushed on the stack by this instruction.
 byte getReturnType()
          Returns the type pushed on the stack.
(package private)  int getSize()
          Returns the number of bytes used by the the instruction in the code array.
 int getStack()
          Return the amount of stack (positive or negative) used by this instruction.
(package private)  void resolveConstants(ConstantPool cp)
          Insert or check location of constant value on constant pool.
(package private)  void write(ConstantPool cp, java.io.DataOutput out)
          Write this instruction into a file.
 
Methods inherited from class at.dms.classfile.Instruction
check, computeEndAddress, dump, getAddress, getLocalVar, getOpcode, getPoppedFromStack, isLiteral, setAddress, setOpcode
 
Methods inherited from class at.dms.classfile.AbstractInstructionAccessor
transform
 
Methods inherited from class java.lang.Object
, clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FieldRefInstruction

public FieldRefInstruction(int opcode,
                           java.lang.String name,
                           java.lang.String type)
Constructs a new field reference instruction.
Parameters:
opcode - the opcode of the instruction.
name - the qualified name of the referenced object.
type - the signature of the referenced object.

FieldRefInstruction

public FieldRefInstruction(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String type)
Constructs a new field reference instruction.
Parameters:
opcode - the opcode of the instruction.
name - the qualified name of the referenced object.
type - the signature of the referenced object.

FieldRefInstruction

public FieldRefInstruction(int opcode,
                           FieldRefConstant field)
Constructs a new field reference instruction from a class file.
Parameters:
opcode - the opcode of the instruction.
field - the field reference (as pooled constant.)
Method Detail

canComplete

public boolean canComplete()
Returns true iff control flow can reach the next instruction in textual order.
Overrides:
canComplete in class Instruction

resolveConstants

void resolveConstants(ConstantPool cp)
Insert or check location of constant value on constant pool.
Overrides:
resolveConstants in class Instruction
Parameters:
cp - the constant pool for this class.

getSize

int getSize()
Returns the number of bytes used by the the instruction in the code array.
Overrides:
getSize in class Instruction

getFieldRefConstant

public FieldRefConstant getFieldRefConstant()
Returns the field constant on which this expression refers itself.

getReturnType

public byte getReturnType()
Returns the type pushed on the stack.
Overrides:
getReturnType in class Instruction

getPushedOnStack

public int getPushedOnStack()
Returns the size of data pushed on the stack by this instruction.
Overrides:
getPushedOnStack in class Instruction

getStack

public int getStack()
Return the amount of stack (positive or negative) used by this instruction.
Overrides:
getStack in class Instruction

write

void write(ConstantPool cp,
           java.io.DataOutput out)
     throws java.io.IOException
Write this instruction into a file.
Overrides:
write in class Instruction
Parameters:
cp - the constant pool that contain all data.
out - the file where to write this object info.
Throws:
java.io.IOException - An io problem has occured.