jef.disconnection.impl
Class DefaultMethodDisconnector

java.lang.Object
  jef.disconnection.impl.DefaultMethodDisconnector

All Implemented Interfaces:

Disconnector, MethodDisconnector

public class DefaultMethodDisconnector
extends java.lang.Object
implements MethodDisconnector

Default implementation of the MethodDisconnector interface.

Author:

frusso@dev.java.net

Constructor Summary

DefaultMethodDisconnector()
Creates a new instance of DefaultMethodDisconnector

Method Summary

void	extract(MethodInfoStructure methodInfo, Dna srcDna, DisconnectedMethod disconnectedMethod) This method copies into the disconnectedMethod instance provided as parameter the given methodInfo object.
protected CodeAttribute	handleAttributes(MethodInfoStructure clonedMethodInfo, boolean isInit)
protected void	handleBytecode(CodeAttribute codeAttribute, DisconnectedMethod disconnectedMethod, ConstantPoolTable srcCpt, Dna srcDna)
protected CodeAttribute	handleCodeAttribute(Attribute attr, boolean isInit)
protected void	handleDeprecatedAttribute(DeprecatedAttribute attr)
protected void	handleExceptionAttribute(ExceptionsAttribute attr)
protected void	handleFieldOrMethodRef(DisconnectedMethod dm, Dna srcDna, ConstantPoolTable srcCpt, int oldRef, int newRef, Instruction instruction)
protected void	handleFirstLevelRefs(MethodInfoStructure clonedMethodInfo, boolean isInit, DisconnectedMethod dm, Dna srcDna)
protected void	handleInnerClassRef(ConstClass cInfo, DisconnectedMethod dm, Dna srcDna)
protected void	handleLineNumberTableAttribute(LineNumberTableAttribute attr, boolean isInit)
protected void	handleLocalVariableTableAttribute(LocalVariableTableAttribute attr, boolean isInit)
protected void	handleSyntheticAttribute(SyntheticAttribute attr)
protected void	innerExtract(MethodInfoStructure methodInfo, Dna srcDna, DisconnectedMethod disconnectedMethod) Protected extraction method.
protected void	innerExtractInit(MethodInfoStructure methodInfo, Dna srcDna, DisconnectedMethod disconnectedMethod)
protected FieldInfoStructure	searchField(Dna dna, int nameIndex, int descIndex) This method searches over the provided Dna instance for a field having the given nameIndex and descriptorIndex.
protected MethodInfoStructure	searchMethod(Dna dna, int nameIndex, int descIndex) This method searches over the provided Dna instance for a method having the given nameIndex and descriptorIndex.
protected void	spawnNewInnerClass(DisconnectedMethod dm, java.lang.String fqicn)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultMethodDisconnector

public DefaultMethodDisconnector()

Creates a new instance of DefaultMethodDisconnector

Method Detail

extract

public void extract(MethodInfoStructure methodInfo,
                    Dna srcDna,
                    DisconnectedMethod disconnectedMethod)
             throws DisconnectionFailedException

This method copies into the disconnectedMethod instance provided as parameter the given methodInfo object. Actually this is a real copy, that is the source methodInfo gets cloned and all its references to cp_infos entries are correctly updated.
What this means is that the copy of a method from a source Dna to a target DisconnectedMethod data structure entails that a deep copy of all the referenced cp_infos will be launched. This is a required step to bring into the target DisconnectedMethod all the other information on which the method definition is based.

Note: if using a stateful deep copier it is fundamental to perform all the deep copy invocations by means of the same DeepCopier instance.

Specified by:

extract in interface MethodDisconnector

Parameters:

methodInfo - The reference to the method to be copied into the target disconnectMethod

srcDna - The Dna instance the methodInfo belongs to

disconnectedMethod - The target DisconnectedMethod instance in which the disconnected method will be stored for a subsequent injection

Throws:

DisconnectionFailedException

innerExtract

protected void innerExtract(MethodInfoStructure methodInfo,
                            Dna srcDna,
                            DisconnectedMethod disconnectedMethod)
                     throws DisconnectionFailedException

Protected extraction method. This is the method that actually implements the logic necessary for "extracting a method" from a Java class definition.

Parameters:

methodInfo - The reference to the method to be copied into the target disconnectMethod

srcDna - The Dna instance the methodInfo belongs to

disconnectMethod - The target DisconnectedMethod instance in which the disconnected method will be stored for a subsequent injection

dstDna - The target Dna instance the disconnected method will be attached to

Throws:

DisconnectionFailedException

handleFirstLevelRefs

protected void handleFirstLevelRefs(MethodInfoStructure clonedMethodInfo,
                                    boolean isInit,
                                    DisconnectedMethod dm,
                                    Dna srcDna)
                             throws DeepCopyException,
                                    java.lang.CloneNotSupportedException,
                                    DisconnectionFailedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

DisconnectionFailedException

handleAttributes

protected CodeAttribute handleAttributes(MethodInfoStructure clonedMethodInfo,
                                         boolean isInit)
                                  throws DeepCopyException,
                                         java.lang.CloneNotSupportedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

handleCodeAttribute

protected CodeAttribute handleCodeAttribute(Attribute attr,
                                            boolean isInit)
                                     throws DeepCopyException,
                                            java.lang.CloneNotSupportedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

handleLineNumberTableAttribute

protected void handleLineNumberTableAttribute(LineNumberTableAttribute attr,
                                              boolean isInit)
                                       throws DeepCopyException,
                                              java.lang.CloneNotSupportedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

handleLocalVariableTableAttribute

protected void handleLocalVariableTableAttribute(LocalVariableTableAttribute attr,
                                                 boolean isInit)
                                          throws DeepCopyException,
                                                 java.lang.CloneNotSupportedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

handleExceptionAttribute

protected void handleExceptionAttribute(ExceptionsAttribute attr)
                                 throws DeepCopyException,
                                        java.lang.CloneNotSupportedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

handleSyntheticAttribute

protected void handleSyntheticAttribute(SyntheticAttribute attr)
                                 throws DeepCopyException,
                                        java.lang.CloneNotSupportedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

handleDeprecatedAttribute

protected void handleDeprecatedAttribute(DeprecatedAttribute attr)
                                  throws DeepCopyException,
                                         java.lang.CloneNotSupportedException

Throws:

DeepCopyException

java.lang.CloneNotSupportedException

handleBytecode

protected void handleBytecode(CodeAttribute codeAttribute,
                              DisconnectedMethod disconnectedMethod,
                              ConstantPoolTable srcCpt,
                              Dna srcDna)
                       throws DisconnectionFailedException,
                              DeepCopyException,
                              java.lang.CloneNotSupportedException,
                              InstantiatorException

Throws:

DisconnectionFailedException

DeepCopyException

java.lang.CloneNotSupportedException

InstantiatorException

handleFieldOrMethodRef

protected void handleFieldOrMethodRef(DisconnectedMethod dm,
                                      Dna srcDna,
                                      ConstantPoolTable srcCpt,
                                      int oldRef,
                                      int newRef,
                                      Instruction instruction)
                               throws DisconnectionFailedException

Throws:

DisconnectionFailedException

handleInnerClassRef

protected void handleInnerClassRef(ConstClass cInfo,
                                   DisconnectedMethod dm,
                                   Dna srcDna)
                            throws java.lang.CloneNotSupportedException,
                                   InstantiatorException,
                                   DeepCopyException

Throws:

java.lang.CloneNotSupportedException

InstantiatorException

DeepCopyException

spawnNewInnerClass

protected void spawnNewInnerClass(DisconnectedMethod dm,
                                  java.lang.String fqicn)

innerExtractInit

protected void innerExtractInit(MethodInfoStructure methodInfo,
                                Dna srcDna,
                                DisconnectedMethod disconnectedMethod)
                         throws DisconnectionFailedException

Throws:

DisconnectionFailedException

searchField

protected FieldInfoStructure searchField(Dna dna,
                                         int nameIndex,
                                         int descIndex)

This method searches over the provided Dna instance for a field having the given nameIndex and descriptorIndex. If found, the first matching field is returned, otherwise null will be the expected return value.

Parameters:

dna - The Dna instance to be inspected

nameIndex - The nameIndex of the field

descIndex - The descIndex of the field

Returns:

FieldInfoStructure The field (if it exists) or null otherwise

searchMethod

protected MethodInfoStructure searchMethod(Dna dna,
                                           int nameIndex,
                                           int descIndex)

This method searches over the provided Dna instance for a method having the given nameIndex and descriptorIndex. If found, the first matching method is returned, otherwise null will be the expected return value.

Parameters:

dna - The Dna instance to be inspected

nameIndex - The nameIndex of the field

descIndex - The descIndex of the field

Returns:

MethodInfoStructure The method (if it exists) or null otherwise