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com.techtrader.modules.tools.bytecode
Class JumpInstruction  

java.lang.Object
  com.techtrader.modules.tools.bytecode.Instruction
      com.techtrader.modules.tools.bytecode.JumpInstruction

All Implemented Interfaces:

Constants, InstructionPtr, com.techtrader.modules.tools.bytecode.visitor.VisitAcceptor

Direct Known Subclasses:

LookupSwitchInstruction, TableSwitchInstruction

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public class JumpInstruction

extends Instruction

implements InstructionPtr

Represents an IF, GOTO, JSR, or similar instruction that specifies as its argument a position in the code block to jump to.

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Field Summary
protected  int	_offset
protected  Instruction	_target

 

Fields inherited from class com.techtrader.modules.tools.bytecode.Instruction

_byteIndex, _opcode, _opcodeTypes, _owner

 

Fields inherited from interface com.techtrader.modules.tools.bytecode.Constants

AALOAD, AASTORE, ACCESS_ABSTRACT, ACCESS_FINAL, ACCESS_INTERFACE, ACCESS_NATIVE, ACCESS_PRIVATE, ACCESS_PROTECTED, ACCESS_PUBLIC, ACCESS_STATIC, ACCESS_STRICT, ACCESS_SUPER, ACCESS_SYNCHRONIZED, ACCESS_TRANSIENT, ACCESS_VOLATILE, ACONST_NULL, ALOAD, ALOAD_0, ALOAD_1, ALOAD_2, ALOAD_3, ANEWARRAY, ARETURN, ARRAY_BOOLEAN, ARRAY_BYTE, ARRAY_CHAR, ARRAY_DOUBLE, ARRAY_FLOAT, ARRAY_INT, ARRAY_LONG, ARRAY_SHORT, ARRAYLENGTH, ASTORE, ASTORE_0, ASTORE_1, ASTORE_2, ASTORE_3, ATHROW, ATTR_CODE, ATTR_CONST, ATTR_DEPRECATED, ATTR_EXCEPTIONS, ATTR_INNERCLASS, ATTR_LINENUMBERS, ATTR_LOCALS, ATTR_SOURCE, ATTR_SYNTHETIC, ATTR_UNKNOWN, 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_EQ, IF_GE, IF_GT, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IF_LE, IF_LT, IF_NE, IF_NONNULL, IF_NULL, 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, MATH_ADD, MATH_AND, MATH_DIV, MATH_MUL, MATH_NEG, MATH_OR, MATH_REM, MATH_SHL, MATH_SHR, MATH_SUB, MATH_USHR, MATH_XOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, OPCODE_NAMES, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, TABLESWITCH, VALID_MAGIC, WIDE

 

Constructor Summary
protected	JumpInstruction(Code owner, int opcode)

 

Method Summary
void	acceptVisit(com.techtrader.modules.tools.bytecode.visitor.BCVisitor visit)           Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this object.
protected  void	copy(Instruction orig)
boolean	equals(java.lang.Object other)           JumpInstructions are equal if they represent the same operation and the Instruction they jump to is the same, or if the jump Instruction of either is unset.
int	getLength()           Return the length in bytes of this opcode, including all arguments.
int	getOffset()           Get the byte offset for the jump instruction.
int	getStackChange()           Return the number of stack positions this instruction pushes or pops during its execution.
Instruction	getTarget()           Get the current target instruction to jump to, if it has been set.
protected  void	readData(java.io.DataInput in)           Read the arguments for this opcode from the given stream.
void	setMarkers(java.util.List instructions)           Use the byte indexes read from the .class file to calculate and set references to the target instruction(s) for this ptr.
void	setOffset(int offset)           Set the byte offset for the jump instruction.
JumpInstruction	setTarget(Instruction instruction)           Set the instruction to jump to; the instruction must already be added to the code block.
protected  void	writeData(java.io.DataOutput out)           Write the arguments for this opcode to the given stream.

 

Methods inherited from class com.techtrader.modules.tools.bytecode.Instruction

getByteIndex, getName, getOpCode, getOwner, invalidate, setByteIndex, setOpCode

 

Methods inherited from class java.lang.Object

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

 

Field Detail

_offset

protected int _offset

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_target

protected Instruction _target

Constructor Detail

JumpInstruction

protected JumpInstruction(Code owner,
                          int opcode)

Method Detail

setOffset

public void setOffset(int offset)

Set the byte offset for the jump instruction.

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getOffset

public int getOffset()

Get the byte offset for the jump instruction.

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setTarget

public JumpInstruction setTarget(Instruction instruction)

Set the instruction to jump to; the instruction must already be added to the code block. WARNING: if this instruction is later deleted from the code block, the results are undefined.

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getTarget

public Instruction getTarget()

Get the current target instruction to jump to, if it has been set. WARNING: if this instruction is later deleted from the code block, the results are undefined.

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setMarkers

public void setMarkers(java.util.List instructions)

Description copied from interface: InstructionPtr

Use the byte indexes read from the .class file to calculate and set references to the target instruction(s) for this ptr. This method will be called after the byte code has been read in for the first time.

Specified by:

setMarkers in interface InstructionPtr

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equals

public boolean equals(java.lang.Object other)

JumpInstructions are equal if they represent the same operation and the Instruction they jump to is the same, or if the jump Instruction of either is unset.

Overrides:

equals in class Instruction

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getLength

public int getLength()

Description copied from class: Instruction

Return the length in bytes of this opcode, including all arguments. This method should be overridden by opcodes that take arguments.

Overrides:

getLength in class Instruction

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getStackChange

public int getStackChange()

Description copied from class: Instruction

Return the number of stack positions this instruction pushes or pops during its execution.

Overrides:

getStackChange in class Instruction

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copy

protected void copy(Instruction orig)

Overrides:

copy in class Instruction

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readData

protected void readData(java.io.DataInput in)
                 throws java.io.IOException

Description copied from class: Instruction

Read the arguments for this opcode from the given stream. This method should be overridden by opcodes that take arguments.

Overrides:

readData in class Instruction

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writeData

protected void writeData(java.io.DataOutput out)
                  throws java.io.IOException

Description copied from class: Instruction

Write the arguments for this opcode to the given stream. This method should be overridden by opcodes that take arguments.

Overrides:

writeData in class Instruction

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acceptVisit

public void acceptVisit(com.techtrader.modules.tools.bytecode.visitor.BCVisitor visit)

Description copied from interface: com.techtrader.modules.tools.bytecode.visitor.VisitAcceptor

Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this object.

Specified by:

acceptVisit in interface com.techtrader.modules.tools.bytecode.visitor.VisitAcceptor

Overrides:

acceptVisit in class Instruction

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> com >> techtrader >> modules >> tools >> [ bytecode overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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