// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.bo.views;

import java.io.*;
import java.util.*;

import org.litesoft.core.typeutils.*;

public class ViewObjectSet implements Serializable
{
    private VOMap mMembers = new VOMap();

    public synchronized boolean isEmpty()
    {
        return mMembers.isEmpty();
    }

    public synchronized int size()
    {
        return mMembers.size();
    }

    public synchronized ViewObject get( ObjectURL pObjectURL )
    {
        return mMembers.get( pObjectURL );
    }

    public synchronized void clear()
    {
        mMembers.clear();
    }

    public synchronized ViewObject add( ViewObject pViewObject )
    {
        if ( pViewObject != null )
        {
            mMembers.put( pViewObject.getObjectURL(), pViewObject );
        }
        return pViewObject;
    }

    public synchronized boolean remove( ViewObject pViewObject )
    {
        return (pViewObject != null) && (null != mMembers.remove( pViewObject.getObjectURL() ));
    }

    /**
     * @return Your own personal Set - To do with it as you please!
     */
    public synchronized Set<ViewObject> getAllMembers()
    {
        return new HashSet<ViewObject>( mMembers.values() );
    }

    @Override
    public synchronized String toString()
    {
        StringBuilder zSB = new StringBuilder();
        LLtitle( zSB );
        int zSize = size();
        if ( zSize == 0 )
        {
            zSB.append( " - No Members" );
        }
        else
        {
            zSB.append( " - " ).append( zSize ).append( " Members:" ).append( '\n' );
            Iterator<ViewObject> zIterator = mMembers.values().iterator();
            String[] zMembers = new String[zSize];
            for ( int i = 0; i < zMembers.length; i++ )
            {
                zMembers[i] = zIterator.next().toString();
            }
            Arrays.sort( zMembers );
            for ( String zMember : zMembers )
            {
                zSB.append( "    " ).append( zMember ).append( '\n' );
            }
        }
        return zSB.toString();
    }

    protected void LLtitle( StringBuilder pSB )
    {
        pSB.append( Objects.justClassNameOf( this ) );
    }

    /**
     * @author matg don't know why, but GWT will not serialize this when private
     */
    static class VOMap extends HashMap<ObjectURL, ViewObject> implements Serializable
    {
        public VOMap()
        {
        }
    }
}