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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2001 Intersect Software Corporation
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see http://www.gnu.org
*/
package net.wotonomy.control;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import net.wotonomy.foundation.NSArray;
/**
* A class that extends NSArray to intercept any accessor calls
* in order to defer loading until the last possible moment.<br><br>
*
* Because ArrayFault inherits from NSArray which implements
* List which implements Collection, data objects may declare
* their relationships to be of type NSArray, List, or Collection.<br><br>
*
* This class should be returned by implementations of
* EOObjectStore.arrayFaultForSourceGlobalID().
*/
public class ArrayFault extends NSArray
{
private EOEditingContext editingContext;
private EOGlobalID sourceID;
private String relationshipKey;
private boolean fetched;
public ArrayFault(
EOGlobalID aSourceID,
String aRelationshipKey,
EOEditingContext aContext )
{
super();
editingContext = aContext;
sourceID = aSourceID;
relationshipKey = aRelationshipKey;
fetched = false;
}
public boolean isFetched()
{
return fetched;
}
protected void fireFault()
{
if ( !fetched )
{
//new net.wotonomy.ui.swing.util.StackTraceInspector();
//System.out.println( "ArrayFault.fireFault: before:" + this );
fetched = true;
super.protectedAddAll(
editingContext.parentObjectStore().objectsForSourceGlobalID(
sourceID,
relationshipKey,
editingContext ) );
//System.out.println( "ArrayFault.fireFault: after:" + this );
}
}
public Object clone()
{
fireFault();
return super.clone();
}
public boolean contains(Object elem)
{
fireFault();
return super.contains( elem );
}
public boolean equals(Object o)
{
fireFault();
return super.equals( o );
}
public Object get(int index)
{
fireFault();
return super.get( index );
}
/**
* Overridden to return the identity hash.
* This somewhat violates the List contract,
* but otherwise calling hash code would
* fire the fault. Bottom line: don't use
* array faults as keys in hash maps.
*/
public int hashCode()
{
return System.identityHashCode( this );
}
public int indexOf(Object o)
{
fireFault();
return super.indexOf( o );
}
public boolean isEmpty()
{
fireFault();
return super.isEmpty();
}
public Iterator iterator()
{
fireFault();
return super.iterator();
}
public int lastIndexOf(Object o)
{
fireFault();
return super.lastIndexOf( o );
}
public ListIterator listIterator()
{
fireFault();
return super.listIterator();
}
public ListIterator listIterator(int index)
{
fireFault();
return super.listIterator( index );
}
public int size()
{
fireFault();
return super.size();
}
public List subList(int fromIndex, int toIndex)
{
fireFault();
return super.subList( fromIndex, toIndex );
}
public Object[] toArray()
{
fireFault();
return super.toArray();
}
public Object[] toArray(Object[] a)
{
fireFault();
return super.toArray( a );
}
/**
* Overridden to display information about
* the fault only if not fetched.
* Calls to super if fetched.
*/
public String toString()
{
if ( isFetched() )
{
return super.toString();
}
return "[ArrayFault@"+Integer.toHexString( System.identityHashCode( this ) )+":"+sourceID+":"+relationshipKey+"]";
}
}
/*
* $Log$
* Revision 1.2 2006/02/16 16:47:14 cgruber
* Move some classes in to "internal" packages and re-work imports, etc.
*
* Also use UnsupportedOperationExceptions where appropriate, instead of WotonomyExceptions.
*
* Revision 1.1 2006/02/16 13:19:57 cgruber
* Check in all sources in eclipse-friendly maven-enabled packages.
*
* Revision 1.5 2003/12/18 15:37:38 mpowers
* Changes to retain ability to work with objects that don't necessarily
* implement EOEnterpriseObject. I would still like to preserve this case
* for general usage, however the access package is free to assume that
* those objects will be EOs and cast appropriately.
*
* Revision 1.4 2003/08/19 01:53:12 chochos
* EOObjectStore had some incompatible return types (Object instead of EOEnterpriseObject, in fault methods mostly). It's internally consistent but I hope it doesn't break anything based on this, even though fault methods mostly throw exceptions for now.
*
* Revision 1.3 2002/10/24 18:17:37 mpowers
* ArrayFaults are now read-only.
*
* Revision 1.2 2001/05/06 22:22:55 mpowers
* Debugging.
*
* Revision 1.1 2001/05/05 23:05:42 mpowers
* Implemented Array Faults.
*
*
*/
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