mChaRM.PremChaRM
Class PreGraph

java.lang.Object
  |
  +--mChaRM.PremChaRM.PreGraph

public class PreGraph

extends java.lang.Object

This class representing the structure of fields and methods used to resolve the problem of sharing out. It contains methods to insert methods/fields and to find multi-refered fields.

Author:

Valentina Cordì (1996s081@educ.disi.unige.it), Maurizio Mazza (1996s065@educ.disi.unige.it), Roberto Montagna (1996s063@educ.disi.unige.it)

Constructor Summary

PreGraph()

Method Summary

java.util.Vector	DangerousFields() This method checks if fields are dangerous, in other words it control if a fields is used by more than one class.
OJField	fieldAt(int index) This method return the OJField object specified by index.
int[]	fieldUsedBy(int index) This method return an array that rapresent in which classes the field is used.
boolean	fieldUsedBy(int index, int className) This method check if a field is used in a class.
void	insertFields(OJField Fields, int[] classesName) Put a field in the graph.
boolean	insertMethod(OJMethod Method, int className) Put a method in the graph.
OJMethod	methodAt(int index) This method return OJMethod specified by given index.
int[]	methodUsedBy(int index) This method return an array that rapresent in which classes a method is called.
boolean	methodUsedBy(int index, int className) This method check if a method is used by a class.
int	numberOfFields() This method return the number of fields stored.
int	numberOfMethods() This method return the number of methods stored.

Methods inherited from class java.lang.Object

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

Constructor Detail

PreGraph

public PreGraph()

Method Detail

numberOfMethods

public int numberOfMethods()

This method return the number of methods stored.

Returns:

size of Vector ojMethods.

methodAt

public OJMethod methodAt(int index)

This method return OJMethod specified by given index.

Parameters:

index - index of element to return

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the index reified doesn't exist.

methodUsedBy

public boolean methodUsedBy(int index,
                            int className)

This method check if a method is used by a class.

Parameters:

index - index of method to be checked.

className - a number that representing name of class to check if method is used in.

Returns:

true if method at specified index is used by specified class.

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the index reified doesn't exist in bUsedMethods.

methodUsedBy

public int[] methodUsedBy(int index)

This method return an array that rapresent in which classes a method is called.

Parameters:

index - index of method

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the index reified doesn't exist in bUsedMethods.

numberOfFields

public int numberOfFields()

This method return the number of fields stored.

Returns:

size of ojFields.

fieldAt

public OJField fieldAt(int index)

This method return the OJField object specified by index.

Parameters:

index - index of element to return

Returns:

the field at given index.

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the index reified doesn't exist in ojFields.

fieldUsedBy

public boolean fieldUsedBy(int index,
                           int className)

This method check if a field is used in a class.

Parameters:

index - index of field to be checked

className - a number that representing name of class to check if field is used in

Returns:

true if field at specified index is used by specified class

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the index reified doesn't exist in bUsedFields.

fieldUsedBy

public int[] fieldUsedBy(int index)

This method return an array that rapresent in which classes the field is used.

Parameters:

index - index of method

Returns:

array of three elements indicating in which classes the field is used.

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the index reified doesn't exist in bUsedFields.

insertMethod

public boolean insertMethod(OJMethod Method,
                            int className)

Put a method in the graph. If the spedified method isn't already present in ojMethods this method adds it and sets bUsedMethod field, otherwise it only update bUsedMethod.

Parameters:

Method - method to insert into the graph.

className - a number that representing class that use the method.

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the classname reified is grater than three

insertFields

public void insertFields(OJField Fields,
                         int[] classesName)

Put a field in the graph. If the spedified fields isn't already present in ojFields add it and set bUsed, otherwise it only update bUsed

Parameters:

Method - method to insert in the graph

className - a number that representing class that use the method

Throws:

java.lang.ArrayIndexOutOfBoundsException - thrown when the classname reified is grater than three

DangerousFields

public java.util.Vector DangerousFields()

This method checks if fields are dangerous, in other words it control if a fields is used by more than one class.

Returns:

array that contains all dangerous methods.