svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.spi / src / main / java / org / gvsig / fmap / dal / feature / spi / memory / MemoryFeatureSet.java @ 40435
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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 Government (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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* 2009 IVER T.I {{Task}}
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*/
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package org.gvsig.fmap.dal.feature.spi.memory; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.feature.FeatureQuery; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.dal.feature.exception.IteratorIndexTooBigException; |
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import org.gvsig.fmap.dal.feature.spi.AbstractFeatureProviderIterator; |
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import org.gvsig.fmap.dal.feature.spi.AbstractFeatureSetProvider; |
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import org.gvsig.fmap.dal.feature.spi.AbstractFeatureStoreProvider; |
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import org.gvsig.fmap.dal.feature.spi.DefaultFeatureProvider; |
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import org.gvsig.fmap.dal.feature.spi.FeatureSetProvider; |
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import org.gvsig.tools.dispose.Disposable; |
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import org.gvsig.tools.exception.BaseException; |
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/**
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* Implementation of {@link FeatureSetProvider} used in
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* {@link AbstractMemoryStoreProvider}
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*
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*/
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public class MemoryFeatureSet extends AbstractFeatureSetProvider { |
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protected List data; |
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public MemoryFeatureSet(AbstractFeatureStoreProvider store,
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FeatureQuery query, FeatureType featureType, List data) {
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super(store, query,
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/*
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* Comprobar si los attributos solicitados son distintos a los
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* originales.
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*/
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featureType.equals(store.getStoreServices() |
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.getProviderFeatureType(featureType.getId())) ? null
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: featureType); |
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this.data = data;
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/*
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* Nota: Como no sabe filtrar ni ordenar ignora el query.
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*/
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} |
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public boolean canFilter() { |
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return false; |
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} |
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public boolean canOrder() { |
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return false; |
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} |
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public boolean canIterateFromIndex() { |
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return true; |
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} |
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public long getSize() throws DataException { |
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return data.size();
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} |
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public boolean isEmpty() throws DataException { |
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return data.isEmpty();
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} |
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protected void doDispose() throws BaseException { |
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//data only has to be deleted when the store.dispose method is called
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//data.clear();
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} |
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protected AbstractFeatureProviderIterator createFastIterator(long index) |
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throws DataException {
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return createIterator(index);
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} |
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protected AbstractFeatureProviderIterator createIterator(long index) |
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throws DataException {
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if (index > 0 && index >= data.size()) { |
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throw new IteratorIndexTooBigException(index, data.size()); |
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} |
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Iterator iter =
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index <= 0 ? data.iterator() : data.listIterator((int) index); |
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if (getFeatureType() == null) { |
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return new DelegatedDisposableIterator(getStore(), iter); |
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} else {
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return new DelegatedDisposableWrappedIterator(getStore(), iter, |
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getFeatureType()); |
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} |
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} |
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protected class DelegatedDisposableIterator extends |
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AbstractFeatureProviderIterator { |
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private Iterator delegated; |
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public DelegatedDisposableIterator(AbstractFeatureStoreProvider store,
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Iterator it) {
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super(store);
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this.delegated = it;
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} |
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protected void internalDispose() { |
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this.delegated = null; |
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} |
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protected boolean internalHasNext() { |
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return delegated.hasNext();
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} |
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protected Object internalNext() { |
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return delegated.next();
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} |
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public void remove() { |
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throw new UnsupportedOperationException(); |
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} |
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protected void doDispose() throws BaseException { |
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if (delegated instanceof Disposable) { |
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((Disposable) delegated).dispose(); |
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} |
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} |
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} |
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protected class DelegatedDisposableWrappedIterator extends |
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DelegatedDisposableIterator { |
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private FeatureType fType;
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public DelegatedDisposableWrappedIterator(
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AbstractFeatureStoreProvider store, Iterator it,
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FeatureType featureType) { |
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super(store, it);
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this.fType = featureType;
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} |
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protected Object internalNext() { |
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DefaultFeatureProvider feature = |
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(DefaultFeatureProvider) super.internalNext();
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if (fType == null) { |
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return feature;
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} else {
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return new MemoryFeatureProviderAttributeMapper(feature, |
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this.fType);
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} |
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} |
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} |
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} |