svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / fmap / dal / feature / impl / DefaultFeatureSelection.java @ 42834
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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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 3
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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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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.dal.feature.impl; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Map.Entry; |
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import org.gvsig.fmap.dal.DataStoreNotification; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.exception.DataRuntimeException; |
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import org.gvsig.fmap.dal.feature.EditableFeature; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureReference; |
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import org.gvsig.fmap.dal.feature.FeatureSelection; |
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import org.gvsig.fmap.dal.feature.FeatureSet; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.dal.feature.exception.ReversedSelectionIteratorException; |
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import org.gvsig.fmap.dal.feature.impl.dynobjectutils.DynObjectSetFeatureSetFacade; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dispose.DisposableIterator; |
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import org.gvsig.tools.dynobject.DynObjectSet; |
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import org.gvsig.tools.dynobject.DynStruct; |
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import org.gvsig.tools.exception.BaseException; |
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import org.gvsig.tools.persistence.PersistenceManager; |
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import org.gvsig.tools.persistence.PersistentState; |
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import org.gvsig.tools.persistence.exception.PersistenceException; |
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import org.gvsig.tools.visitor.VisitCanceledException; |
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import org.gvsig.tools.visitor.Visitor; |
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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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private static final Logger LOG = LoggerFactory |
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.getLogger(DefaultFeatureSelection.class); |
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private Map featureTypeCounts = new HashMap(1); |
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private Map<Feature,Iterator> featureIterators = new HashMap<>(); |
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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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* @throws DataException
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* if there is an error while getting the total number of
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* Features of the Store.
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* @see AbstractSetBasedDataSelection#DefaultSelection(int)
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*/
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public DefaultFeatureSelection(DefaultFeatureStore featureStore)
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throws DataException {
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super(featureStore);
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} |
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/**
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* Creates a new Selection with the total size of Features from which the
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* selection will be performed.
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*
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* @param featureStore
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* the FeatureStore of the selected FeatureReferences
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* @param helper
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* to get some information of the Store
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* @throws DataException
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* if there is an error while getting the total number of
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* Features of the Store.
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*/
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public DefaultFeatureSelection(FeatureStore featureStore,
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FeatureSelectionHelper helper) throws DataException {
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super(featureStore, helper);
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} |
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/**
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* Constructor used by the persistence manager. Don't use directly. After to
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* invoke this method, the persistence manager calls the the method
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* {@link #loadFromState(PersistentState)} to set the values of the internal
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* attributes that this class needs to work.
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*/
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public DefaultFeatureSelection() {
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super();
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} |
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public boolean select(Feature feature) { |
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return select(feature, true); |
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} |
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/**
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* @see #select(Feature)
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* @param undoable
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* if the action must be undoable
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*/
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public boolean select(Feature feature, boolean undoable) { |
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// TODO: should we check if the feature is from the same FeatureStore??
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if (feature == null) { |
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return false; |
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} |
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// LOGGER.debug("Selected feature: {}", feature);
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if (isReversed()) {
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removeFeatureTypeCount(feature.getType()); |
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} else {
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addFeatureTypeCount(feature.getType()); |
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} |
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return select(feature.getReference(), undoable);
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} |
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public boolean select(FeatureSet features) throws DataException { |
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return select(features, true); |
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} |
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/**
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* @see #select(FeatureSet)
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* @param undoable
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* if the action must be undoable
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*/
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public boolean select(FeatureSet features, boolean undoable) |
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throws DataException {
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boolean change = false; |
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boolean inComplex = false; |
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if (undoable && getFeatureStore().isEditing()
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&& !getCommands().inComplex()) { |
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getCommands().startComplex("_selectionSelectFeatureSet");
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inComplex = getCommands().inComplex(); |
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} |
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disableNotifications(); |
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DisposableIterator iter = null;
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try {
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for (iter = features.fastIterator(); iter.hasNext();) {
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change |= select((Feature) iter.next(), undoable); |
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} |
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} finally {
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dispose(iter); |
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} |
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enableNotifications(); |
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if (undoable && getFeatureStore().isEditing() && inComplex) {
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getCommands().endComplex(); |
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} |
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if (change) {
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notifyObservers(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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return deselect(feature, true); |
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} |
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/**
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* @see #deselect(Feature)
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* @param undoable
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* if the action must be undoable
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*/
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public boolean deselect(Feature feature, boolean undoable) { |
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if (feature == null) { |
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return false; |
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} |
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LOG.debug("Deselected feature: {}", feature);
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if (isReversed()) {
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addFeatureTypeCount(feature.getType()); |
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} else {
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removeFeatureTypeCount(feature.getType()); |
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} |
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return deselect(feature.getReference(), undoable);
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} |
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public boolean deselect(FeatureSet features) throws DataException { |
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return deselect(features, true); |
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} |
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/**
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* @see #deselect(FeatureSet)
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* @param undoable
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* if the action must be undoable
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*/
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public boolean deselect(FeatureSet features, boolean undoable) |
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throws DataException {
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boolean change = false; |
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if (undoable && getFeatureStore().isEditing()) {
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getCommands().startComplex("_selectionDeselectFeatureSet");
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} |
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disableNotifications(); |
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DisposableIterator iter = null;
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try {
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for (iter = features.fastIterator(); iter.hasNext();) {
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change |= deselect((Feature) iter.next(), undoable); |
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} |
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} finally {
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dispose(iter); |
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} |
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enableNotifications(); |
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if (undoable && getFeatureStore().isEditing()) {
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getCommands().endComplex(); |
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} |
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if (change) {
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notifyObservers(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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// Use the selection data size as a small optimization for the most
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// common case, when nothing is selected and every feature is checked
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// while drawing or painting the table document.
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if (selectionData.isReversed()) {
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return selectionData.getSize() == 0 |
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|| !selectionData.contains(feature.getReference()); |
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} else {
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return selectionData.getSize() > 0 |
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&& selectionData.contains(feature.getReference()); |
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} |
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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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LOG.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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// Go through the map of FeatureTypes, and return only the ones that
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// have at least a Feature.
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List types = new ArrayList(); |
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for (java.util.Iterator iterator = featureTypeCounts.entrySet()
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.iterator(); iterator.hasNext();) { |
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Map.Entry entry = (Entry) iterator.next();
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FeatureType type = (FeatureType) entry.getKey(); |
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Long count = (Long) entry.getValue(); |
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if (count.longValue() > 0) { |
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types.add(type); |
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} |
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} |
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return types;
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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 DisposableIterator 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 DisposableIterator iterator(long index) { |
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return iterator(index, false); |
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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 DisposableIterator 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 DisposableIterator fastIterator(long index) { |
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return iterator(index, true); |
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} |
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protected void clearFeatureReferences() { |
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super.clearFeatureReferences();
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featureTypeCounts.clear(); |
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} |
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/**
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* Creates an iterator for the Selection.
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*/
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private DisposableIterator iterator(long index, boolean fastIterator) { |
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if (isReversed()) {
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DisposableIterator iter = new ReversedFeatureIteratorFacade(
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getData(), getFeatureStore(), fastIterator); |
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for (long l = 0; l < index && iter.hasNext(); l++) { |
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iter.next(); |
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} |
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return iter;
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} else {
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// TODO: maybe we could add a new referenceIterator(int index)
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// method that could be implemented in a more performant way
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java.util.Iterator iter = selectionData.getSelected().iterator(); |
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for (long l = 0; l < index && iter.hasNext(); l++) { |
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iter.next(); |
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} |
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return new FeatureIteratorFacade(iter, getFeatureStore()); |
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} |
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} |
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private Long removeFeatureTypeCount(FeatureType featureType) { |
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Long count = (Long) featureTypeCounts.get(featureType); |
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if (count == null) { |
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count = new Long(-1); |
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} else {
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count = new Long(count.longValue() - 1); |
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} |
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featureTypeCounts.put(featureType, count); |
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return count;
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} |
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private Long addFeatureTypeCount(FeatureType featureType) { |
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Long count = (Long) featureTypeCounts.get(featureType); |
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if (count == null) { |
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count = new Long(1); |
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} else {
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count = new Long(count.longValue() + 1); |
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} |
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featureTypeCounts.put(featureType, count); |
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return count;
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} |
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/**
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* Facade over a Iterator of FeatureReferences, to return Features instead.
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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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private class FeatureIteratorFacade implements DisposableIterator { |
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private final Logger LOGGER = LoggerFactory |
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.getLogger(FeatureIteratorFacade.class); |
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private java.util.Iterator refIterator;
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private FeatureStore featureStore;
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private Feature currentFeature = null; |
396 |
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public FeatureIteratorFacade(java.util.Iterator iter,
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FeatureStore featureStore) { |
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this.refIterator = iter;
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this.featureStore = featureStore;
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} |
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public boolean hasNext() { |
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return refIterator.hasNext();
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} |
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|
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public Object next() { |
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FeatureReference ref = nextFeatureReference(); |
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try {
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currentFeature = featureStore.getFeatureByReference(ref); |
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return currentFeature;
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} catch (DataException ex) {
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LOGGER.error( |
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"Error loading the Feature with FeatureReference: "
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+ ref, ex); |
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return null; |
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} |
418 |
} |
419 |
|
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/**
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* Returns the next FeatureReference.
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*
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* @return the next FeatureReference
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*/
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public FeatureReference nextFeatureReference() {
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return (FeatureReference) refIterator.next();
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} |
428 |
|
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public void remove() { |
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try {
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featureStore.delete(currentFeature); |
432 |
refIterator.remove(); |
433 |
} catch (DataException e) {
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throw new RemoveFromFeatureSelectionException(e); |
435 |
} |
436 |
} |
437 |
|
438 |
public class RemoveFromFeatureSelectionException extends DataRuntimeException { |
439 |
|
440 |
/**
|
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*
|
442 |
*/
|
443 |
private static final long serialVersionUID = 2636692469445838928L; |
444 |
private final static String MESSAGE_FORMAT = "Can't remove feature from selection."; |
445 |
private final static String MESSAGE_KEY = "_RemoveFromFeatureSelectionException"; |
446 |
|
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public RemoveFromFeatureSelectionException(Throwable cause) { |
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super(MESSAGE_FORMAT, cause, MESSAGE_KEY, serialVersionUID);
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//setValue("store", store);
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} |
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} |
452 |
|
453 |
public void dispose() { |
454 |
if (refIterator instanceof DisposableIterator) { |
455 |
((DisposableIterator) refIterator).dispose(); |
456 |
} |
457 |
refIterator = null;
|
458 |
featureStore = null;
|
459 |
} |
460 |
} |
461 |
|
462 |
/**
|
463 |
* Facade over a Iterator of FeatureReferences, to return Features instead,
|
464 |
* when the Selection is reversed
|
465 |
*
|
466 |
* @author <a href="mailto:cordin@disid.com">C?sar Ordi?ana</a>
|
467 |
*/
|
468 |
private class ReversedFeatureIteratorFacade implements DisposableIterator { |
469 |
|
470 |
private SelectionData selectionData;
|
471 |
|
472 |
private DisposableIterator iterator;
|
473 |
|
474 |
private Feature nextFeature = null; |
475 |
private Feature currentFeature = null; |
476 |
|
477 |
private FeatureSet featureSet;
|
478 |
|
479 |
public ReversedFeatureIteratorFacade(SelectionData selectionData,
|
480 |
FeatureStore featureStore, boolean fastIterator) {
|
481 |
this.selectionData = selectionData;
|
482 |
|
483 |
// Load a Set with all the store features
|
484 |
try {
|
485 |
featureSet = featureStore.getFeatureSet(); |
486 |
//if (fastIterator) {
|
487 |
iterator = featureSet.fastIterator(); |
488 |
// } else {
|
489 |
// iterator = featureSet.iterator();
|
490 |
// }
|
491 |
} catch (DataException ex) {
|
492 |
throw new ReversedSelectionIteratorException(ex); |
493 |
} |
494 |
|
495 |
// Filter the features not selected and position in the next
|
496 |
// selected feature
|
497 |
positionInNextElement(); |
498 |
} |
499 |
|
500 |
public boolean hasNext() { |
501 |
return nextFeature != null; |
502 |
} |
503 |
|
504 |
public Object next() { |
505 |
featureIterators.remove(currentFeature); |
506 |
currentFeature = nextFeature.getCopy(); |
507 |
featureIterators.put(currentFeature, this);
|
508 |
positionInNextElement(); |
509 |
return currentFeature ;
|
510 |
} |
511 |
|
512 |
public void remove() { |
513 |
try {
|
514 |
featureSet.delete(currentFeature); |
515 |
} catch (DataException e) {
|
516 |
throw new RemoveFromFeatureSelectionException(e); |
517 |
|
518 |
} |
519 |
} |
520 |
|
521 |
public class RemoveFromFeatureSelectionException extends DataRuntimeException { |
522 |
|
523 |
/**
|
524 |
*
|
525 |
*/
|
526 |
private static final long serialVersionUID = 2636692469445838928L; |
527 |
private final static String MESSAGE_FORMAT = "Can't remove feature from reversed selection."; |
528 |
private final static String MESSAGE_KEY = "_RemoveFromFeatureSelectionException"; |
529 |
|
530 |
public RemoveFromFeatureSelectionException(Throwable cause) { |
531 |
super(MESSAGE_FORMAT, cause, MESSAGE_KEY, serialVersionUID);
|
532 |
//setValue("store", store);
|
533 |
} |
534 |
} |
535 |
|
536 |
|
537 |
private void positionInNextElement() { |
538 |
nextFeature = null;
|
539 |
while (iterator.hasNext()) {
|
540 |
nextFeature = (Feature) iterator.next(); |
541 |
if (selectionData.contains(nextFeature.getReference())) {
|
542 |
nextFeature = null;
|
543 |
} else {
|
544 |
break;
|
545 |
} |
546 |
} |
547 |
} |
548 |
|
549 |
public void dispose() { |
550 |
this.featureSet.dispose();
|
551 |
this.iterator.dispose();
|
552 |
this.selectionData = null; |
553 |
this.nextFeature = null; |
554 |
} |
555 |
} |
556 |
|
557 |
public void delete(Feature feature) throws DataException { |
558 |
Iterator it = this.featureIterators.get(feature); |
559 |
if( it!=null ) { |
560 |
it.remove(); |
561 |
return;
|
562 |
} |
563 |
feature.getStore().delete(feature); |
564 |
} |
565 |
|
566 |
public void insert(EditableFeature feature) throws DataException { |
567 |
feature.getStore().insert(feature); |
568 |
} |
569 |
|
570 |
public void update(EditableFeature feature) throws DataException { |
571 |
feature.getStore().update(feature); |
572 |
} |
573 |
|
574 |
/*
|
575 |
* (non-Javadoc)
|
576 |
*
|
577 |
* @seeorg.gvsig.fmap.dal.feature.impl.DefaultFeatureReferenceSelection#
|
578 |
* loadFromState(org.gvsig.tools.persistence.PersistentState)
|
579 |
*/
|
580 |
public void loadFromState(PersistentState state) |
581 |
throws PersistenceException {
|
582 |
super.loadFromState(state);
|
583 |
|
584 |
} |
585 |
|
586 |
public void accept(Visitor visitor) throws BaseException { |
587 |
accept(visitor, 0);
|
588 |
} |
589 |
|
590 |
public final void accept(Visitor visitor, long firstValueIndex) |
591 |
throws BaseException {
|
592 |
try {
|
593 |
doAccept(visitor, firstValueIndex); |
594 |
} catch (VisitCanceledException ex) {
|
595 |
// The visit has been cancelled by the visitor, so we finish here.
|
596 |
LOG.debug( |
597 |
"The visit, beggining on position {}, has been cancelled "
|
598 |
+ "by the visitor: {}", new Long(firstValueIndex), |
599 |
visitor); |
600 |
} |
601 |
} |
602 |
|
603 |
private void doAccept(Visitor visitor, long firstValueIndex) |
604 |
throws BaseException {
|
605 |
DisposableIterator iterator = fastIterator(firstValueIndex); |
606 |
|
607 |
if (iterator != null) { |
608 |
try {
|
609 |
while (iterator.hasNext()) {
|
610 |
Feature feature = (Feature) iterator.next(); |
611 |
visitor.visit(feature); |
612 |
} |
613 |
} finally {
|
614 |
iterator.dispose(); |
615 |
} |
616 |
} |
617 |
} |
618 |
|
619 |
protected void doDispose() throws BaseException { |
620 |
super.doDispose();
|
621 |
featureTypeCounts.clear(); |
622 |
} |
623 |
|
624 |
public static void registerPersistent() { |
625 |
PersistenceManager manager = ToolsLocator.getPersistenceManager(); |
626 |
DynStruct definition = manager.addDefinition( |
627 |
DefaultFeatureSelection.class, "DefaultFeatureSelection",
|
628 |
"DefaultFeatureSelection Persistent definition", null, null); |
629 |
|
630 |
definition.extend(manager.getDefinition(DefaultFeatureReferenceSelection.DYNCLASS_PERSISTENT_NAME)); |
631 |
definition.addDynFieldMap("featureTypeCounts")
|
632 |
.setClassOfItems(Long.class).setMandatory(false); |
633 |
|
634 |
} |
635 |
|
636 |
public Object clone() throws CloneNotSupportedException { |
637 |
DefaultFeatureSelection clone = (DefaultFeatureSelection) super.clone();
|
638 |
clone.featureTypeCounts = new HashMap(featureTypeCounts); |
639 |
return clone;
|
640 |
} |
641 |
|
642 |
public DynObjectSet getDynObjectSet() {
|
643 |
return new DynObjectSetFeatureSetFacade(this, getFeatureStore()); |
644 |
} |
645 |
|
646 |
public DynObjectSet getDynObjectSet(boolean fast) { |
647 |
return new DynObjectSetFeatureSetFacade(this, getFeatureStore(), fast); |
648 |
} |
649 |
|
650 |
} |