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branches/Fmap_GisPlanet/libraries/libFMap/src/com/iver/cit/gvsig/fmap/operations/selection/LinkSelectionListener.java
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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 *
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 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.
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 *
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 * For more information, contact:
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 *
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 *  Generalitat Valenciana
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 *   Conselleria d'Infraestructures i Transport
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 *   Av. Blasco Ib??ez, 50
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 *   46010 VALENCIA
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 *   SPAIN
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 *
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 *      +34 963862235
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 *   gvsig@gva.es
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 *      www.gvsig.gva.es
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 *
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 *    or
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 *
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 *   IVER T.I. S.A
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 *   Salamanca 50
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 *   46005 Valencia
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 *   Spain
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 *
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 *   +34 963163400
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 *   dac@iver.es
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 */
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package com.iver.cit.gvsig.fmap.operations.selection;
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import com.hardcode.gdbms.engine.data.driver.DriverException;
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import com.hardcode.gdbms.engine.values.Value;
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import com.iver.cit.gvsig.fmap.layers.FBitSet;
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import com.iver.cit.gvsig.fmap.layers.SelectableDataSource;
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import com.iver.cit.gvsig.fmap.layers.SelectionEvent;
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import com.iver.cit.gvsig.fmap.layers.SelectionListener;
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import java.util.HashMap;
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/**
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 * Listener que est? pendiente de la selecci?n que se haga sobre la tabla para
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 * poder seleccionar de la tabla linkada los registros oportunos.
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 *
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 * @author Vicente Caballero Navarro
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 */
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public class LinkSelectionListener implements SelectionListener {
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	private SelectableDataSource modelo1;
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	private SelectableDataSource modelo2;
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	private int index1;
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	private int index2;
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	/**
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	 * Crea un nuevo LinkSelectionListener. Donde se pasan como par?metros dos
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	 * SelectableDataSource, el primero de ellos(model1), representa la tabla
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	 * sobre la que al seleccionar alg?n registro buscaremos en el modelo2
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	 * para ver el valor del campo s1 y compararlo con el valor del campo s2 y
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	 * de esta forma seleccionar instantanemente los registros oportunos en la
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	 * tabla al que se representa con el modelo2.
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	 *
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	 * @param model1 SelectableDataSource de la tabla sobre la que se efectua
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	 * 		  el link.
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	 * @param model2 SelectableDataSource de la tabla linkada.
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	 * @param s1 nombre del campo de la tabla donde se efectua el link.
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	 * @param s2 nombre del campo de la tabla linkada.
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	 */
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	public LinkSelectionListener(SelectableDataSource model1,
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		SelectableDataSource model2, String s1, String s2) {
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		modelo1 = model1;
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		modelo2 = model2;
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		try {
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			index1 = modelo1.getFieldIndexByName(s1);
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			index2 = modelo2.getFieldIndexByName(s2);
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		} catch (DriverException e) {
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			e.printStackTrace();
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		}
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		//field1 = s1;
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		//field2 = s2;
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	}
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	/**
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	 * @see com.iver.cit.gvsig.fmap.layers.LegendListener#selectionChanged(com.iver.cit.gvsig.fmap.layers.LayerEvent)
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	 */
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	public void selectionChanged(SelectionEvent e) {
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		FBitSet bs1 = modelo1.getSelection();
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		FBitSet bs2 = new FBitSet(); //(FBitSet)modelo2.getSelection().clone();
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		HashMap idx = new HashMap((int) bs1.cardinality());
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		//int index1 = -1;
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		//int index2 = -1;
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		try {
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			//		Construimos el ?ndice
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			for (int i = bs1.nextSetBit(0); i >= 0;
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					i = bs1.nextSetBit(i + 1)) {
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				Value v = modelo1.getFieldValue((long) i, index1);
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				if (idx.get(v) == null) {
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					idx.put(v, new Integer(i));
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				}
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			}
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		} catch (DriverException e2) {
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			e2.printStackTrace();
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		}
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		try {
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			for (int i = 0; i < modelo2.getRowCount(); i++) {
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				Value v = modelo2.getFieldValue(i, index2);
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				Integer pi = (Integer) idx.get(v);
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				if (pi != null) {
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					bs2.set(i);
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				}
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			}
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		} catch (DriverException e1) {
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			e1.printStackTrace();
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		}
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		modelo2.setSelection(bs2);
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		//modelo2.fireSelectionEvents();
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	}
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}
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