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org.josql.incubator
Class ObjectIndex  

java.lang.Object
  org.josql.incubator.ObjectIndex

All Implemented Interfaces:

java.util.Comparator

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public class ObjectIndex

extends java.lang.Object

implements java.util.Comparator

This is an experimental class aimed at producing an index across a collection of homogeneous objects. It should be noted here that it is the "sorting" of the elements in the List of objects that takes nearly all the time here. Use the sort() 55 method yourself to only perform sort once. Everytime you add an object however the sort status of the List of objects will be invalidated and have to be re-sorted before you have retrieve the objects again.

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Field Summary
private  java.lang.Class	c
private  boolean	dirty
private  java.util.List	indices
private  java.util.List	objs
private  int	size
private  boolean	syncOnAdd

 

Constructor Summary

ObjectIndex(java.lang.Class c)

 

Method Summary
void	add(java.lang.String name)
void	addObject(java.lang.Object o)
int	compare(java.lang.Object o, java.util.List keys)
int	compare(java.lang.Object o1, java.lang.Object o2)           Return an integer that is negative, zero or positive depending on whether the first argument is less than, equal to or greater than the second according to this ordering.
java.util.List	getObjects(java.util.List keys)
boolean	isSyncOnAdd()
void	removeObject(java.lang.Object o)
void	setSyncOnAdd(boolean v)
int	size()
void	sort()

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface java.util.Comparator

equals

 

Field Detail

objs

private java.util.List objs

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indices

private java.util.List indices

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c

private java.lang.Class c

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size

private int size

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dirty

private boolean dirty

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syncOnAdd

private boolean syncOnAdd

Constructor Detail

ObjectIndex

public ObjectIndex(java.lang.Class c)

Method Detail

isSyncOnAdd

public boolean isSyncOnAdd()

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setSyncOnAdd

public void setSyncOnAdd(boolean v)

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getObjects

public java.util.List getObjects(java.util.List keys)

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size

public int size()

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sort

public void sort()

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add

public void add(java.lang.String name)

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removeObject

public void removeObject(java.lang.Object o)

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addObject

public void addObject(java.lang.Object o)

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compare

public int compare(java.lang.Object o,
                   java.util.List keys)

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compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)

Description copied from interface: java.util.Comparator

Return an integer that is negative, zero or positive depending on whether the first argument is less than, equal to or greater than the second according to this ordering. This method should obey the following contract:

• if compare(a, b) < 0 then compare(b, a) > 0
• if compare(a, b) throws an exception, so does compare(b, a)
• if compare(a, b) < 0 and compare(b, c) < 0 then compare(a, c) < 0
• if compare(a, b) == 0 then compare(a, c) and compare(b, c) must have the same sign

To be consistent with equals, the following additional constraint is in place:

• if a.equals(b) or both a and b are null, then compare(a, b) == 0.

Although it is permissible for a comparator to provide an order inconsistent with equals, that should be documented.

Specified by:

compare in interface java.util.Comparator

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