jist.runtime
Class RewriterTraversalRemoveFieldAccess

java.lang.Object
  jist.runtime.ClassTraversal.Empty
      jist.runtime.RewriterTraversalRemoveFieldAccess

All Implemented Interfaces:

ClassTraversal.Visitor

 class RewriterTraversalRemoveFieldAccess
extends ClassTraversal.Empty

Traversal object that ensures all entity field access operations are converted to method invocations. The traversal replaces all getfield, getstatic, putfield and putstatic instructions into the appropriate method invocations.

Since:

JIST1.0

Author:

Rimon Barr <barr+jist@cs.cornell.edu>

Field Summary

private org.apache.bcel.generic.InstructionFactory	ifc class instruction factory.
private Rewriter	rewriter primary rewriter.

Constructor Summary

RewriterTraversalRemoveFieldAccess(Rewriter rewriter)
Create rewriter object to convert all remote field accesses to method accesses.

Method Summary

org.apache.bcel.generic.ClassGen	doClass(org.apache.bcel.generic.ClassGen cg) Upcall to process class before field and method processing.
void	doInstruction(org.apache.bcel.generic.ClassGen cg, org.apache.bcel.generic.MethodGen mg, org.apache.bcel.generic.InstructionHandle ih, org.apache.bcel.generic.Instruction inst) Upcall to process instruction. Note that instructions can be inserted and deleted directly using the BCEL API, and therefore this method returns void.
private boolean	isLocalNonPublicFieldAccess(org.apache.bcel.generic.ClassGen cg, org.apache.bcel.generic.ConstantPoolGen cpg, org.apache.bcel.generic.FieldInstruction inst) Determine whether instruction is local field access.

Methods inherited from class jist.runtime.ClassTraversal.Empty

doClassPost, doField, doMethod, doMethodPost

Methods inherited from class java.lang.Object

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

Field Detail

ifc

private org.apache.bcel.generic.InstructionFactory ifc

class instruction factory.

rewriter

private Rewriter rewriter

primary rewriter.

Constructor Detail

RewriterTraversalRemoveFieldAccess

public RewriterTraversalRemoveFieldAccess(Rewriter rewriter)

Create rewriter object to convert all remote field accesses to method accesses.

Parameters:

rewriter - reference to primary rewriter

Method Detail

doClass

public org.apache.bcel.generic.ClassGen doClass(org.apache.bcel.generic.ClassGen cg)

Upcall to process class before field and method processing.

Specified by:

doClass in interface ClassTraversal.Visitor

Overrides:

doClass in class ClassTraversal.Empty

Parameters:

cg - BCEL class generator object to process

Returns:

processed BCEL class generator object

isLocalNonPublicFieldAccess

private boolean isLocalNonPublicFieldAccess(org.apache.bcel.generic.ClassGen cg,
                                            org.apache.bcel.generic.ConstantPoolGen cpg,
                                            org.apache.bcel.generic.FieldInstruction inst)

Determine whether instruction is local field access.

Parameters:

cg - class object

cpg - class constant pool

inst - instruction to test

Returns:

whether given instruction is of a local field access.

doInstruction

public void doInstruction(org.apache.bcel.generic.ClassGen cg,
                          org.apache.bcel.generic.MethodGen mg,
                          org.apache.bcel.generic.InstructionHandle ih,
                          org.apache.bcel.generic.Instruction inst)
                   throws java.lang.ClassNotFoundException

Upcall to process instruction. Note that instructions can be inserted and deleted directly using the BCEL API, and therefore this method returns void.

Specified by:

doInstruction in interface ClassTraversal.Visitor

Overrides:

doInstruction in class ClassTraversal.Empty

Parameters:

cg - BCEL class generator object

mg - BCEL method generator object

ih - BCEL instruction handle object to process

inst - BCEL instruction object to process

Throws:

java.lang.ClassNotFoundException