root / branches / v2_0_0_prep / libraries / libFMap_data / src / org / gvsig / fmap / data / feature / impl / DefaultFeatureSelection.java @ 24023
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Gobernment (CIT)
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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/*
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* AUTHORS (In addition to CIT):
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* 2008 {DiSiD Technologies} {Implement data selection}
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*/
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package org.gvsig.fmap.data.feature.impl; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.gvsig.fmap.data.DataStoreNotification; |
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import org.gvsig.fmap.data.exceptions.DataException; |
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import org.gvsig.fmap.data.feature.*; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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/**
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* Default implementation of the FeatureSelection interface. Internally, only
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* FeatureReference values are stored.
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*
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* This implementation performs better if used with the selection related
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* methods: select, deselect and isSelected ones.
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*
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* @author <a href="mailto:cordin@disid.com">C?sar Ordi?ana</a>
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*/
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public class DefaultFeatureSelection extends DefaultFeatureReferenceSelection |
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implements FeatureSelection {
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final Logger logger = LoggerFactory |
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.getLogger(DefaultFeatureSelection.class); |
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/**
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* Creates a DefaultFeatureSelection, with a FeatureStore.
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*
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* @param featureStore
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* the FeatureStore to load Features from
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*
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* @see AbstractSetBasedDataSelection#DefaultSelection(int)
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*/
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public DefaultFeatureSelection(FeatureStore featureStore) {
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super(featureStore);
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} |
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/**
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* Creates a DefaultFeatureSelection, with a FeatureStore.
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*
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* @param featureStore
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* the FeatureStore to load Features from
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* @param totalSize
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* the maximum number of Features that may be selected
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*/
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public DefaultFeatureSelection(FeatureStore featureStore, long totalSize) { |
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super(featureStore, totalSize);
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} |
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public boolean select(Feature feature) { |
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if (feature == null) { |
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return false; |
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} |
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return select(feature.getReference());
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} |
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public boolean select(FeatureSet features) throws DataException { |
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// TODO: verificar si las features son del mismo FeatureStore
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boolean change = false; |
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diableNotifications(); |
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for (Iterator iter = features.fastIterator(); iter.hasNext();) { |
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change |= select((Feature) iter.next()); |
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} |
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enableNotifications(); |
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if (change) {
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notifyObservers(this, DataStoreNotification.SELECTION_CHANGE);
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} |
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return change;
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} |
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public boolean deselect(Feature feature) { |
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if (feature == null) { |
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return false; |
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} |
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return deselect(feature.getReference());
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} |
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public boolean deselect(FeatureSet features) throws DataException { |
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// TODO: verificar si las features son del mismo FeatureStore
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boolean change = false; |
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diableNotifications(); |
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for (Iterator iter = features.fastIterator(); iter.hasNext();) { |
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change |= deselect((Feature) iter.next()); |
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} |
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enableNotifications(); |
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if (change) {
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notifyObservers(this, DataStoreNotification.SELECTION_CHANGE);
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} |
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return change;
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} |
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public boolean isSelected(Feature feature) { |
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if (feature == null) { |
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return false; |
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} |
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return isSelected(feature.getReference());
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} |
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public FeatureType getDefaultFeatureType() {
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try {
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return getFeatureStore().getDefaultFeatureType();
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} catch (DataException ex) {
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logger.error("Error getting the default feature type "
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+ "of the FeatureStore: " + getFeatureStore(), ex);
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} |
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return null; |
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} |
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public List getFeatureTypes() { |
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// TODO: implement
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throw new UnsupportedOperationException("Not implemented"); |
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} |
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public long getSize() throws DataException { |
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return getSelectedCount();
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} |
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public boolean isEmpty() throws DataException { |
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return getSelectedCount() == 0; |
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} |
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/**
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* Returns the list of selected values, or the deselected ones if the
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* selection has been reversed.
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*/
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public Iterator iterator() { |
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return iterator(0); |
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} |
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/**
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* Returns the list of selected values, or the deselected ones if the
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* selection has been reversed.
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*
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* WARN: not very good performance implementation.
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*/
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public Iterator iterator(long index) { |
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// TODO: evaluar la opci?n de obtener las features
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// mediante una query al FeatureStore.
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Iterator iter = referenceIterator();
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for (long l = 0; l < index; l++) { |
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iter.next(); |
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} |
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return new FeatureIteratorFacade(iter); |
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} |
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/**
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* Returns the list of selected values, or the deselected ones if the
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* selection has been reversed.
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*
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* WARN: not really a fast implementation.
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*/
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public Iterator fastIterator() { |
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return fastIterator(0); |
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} |
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/**
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* Returns the list of selected values, or the deselected ones if the
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* selection has been reversed.
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*
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* WARN: not really a fast implementation.
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*/
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public Iterator fastIterator(long index) { |
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return iterator(index);
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} |
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} |