svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc / JDBCIterator.java @ 40596
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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.store.jdbc; |
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import java.util.NoSuchElementException; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.exception.OpenException; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.dal.feature.spi.AbstractFeatureProviderIterator; |
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import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
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import org.gvsig.tools.exception.BaseException; |
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/**
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* @author jmvivo
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*
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*/
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public class JDBCIterator extends AbstractFeatureProviderIterator { |
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protected int resultSetID; |
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protected Boolean hasNext = null; |
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protected FeatureType featureType;
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protected JDBCSetProvider set;
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protected JDBCIterator(JDBCStoreProvider store, JDBCSetProvider set,
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FeatureType featureType, |
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int resulsetID) throws DataException { |
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super(store);
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this.resultSetID = resulsetID;
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this.featureType = featureType;
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this.set = set;
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this.hasNext = null; |
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if (this.set != null && resulsetID >= 0){ |
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this.set.addResulsetReference(resulsetID);
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} |
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} |
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private JDBCStoreProvider getJDBCStoreProvider() {
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return (JDBCStoreProvider) getFeatureStoreProvider();
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} |
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public final Object next() { |
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try {
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getDataStoreProvider().open(); |
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} catch (OpenException e) {
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throw new RuntimeException(e); |
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} |
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return internalNext();
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} |
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public final boolean hasNext() { |
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return internalHasNext();
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} |
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@Override
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protected boolean internalHasNext() { |
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if (hasNext == null) { |
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try {
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if (getJDBCStoreProvider().resulsetNext(resultSetID)) {
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hasNext = Boolean.TRUE;
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} else {
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hasNext = Boolean.FALSE;
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this.close();
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} |
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} catch (DataException e) {
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// FIXME Exception
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throw new RuntimeException(e); |
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} |
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} |
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return hasNext.booleanValue();
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} |
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@Override
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protected Object internalNext() { |
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if (!hasNext()) {
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throw new NoSuchElementException(); |
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} |
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FeatureProvider data; |
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try {
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data = getFeatureProvider(); |
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} catch (DataException e) {
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// FIXME Exception
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throw new RuntimeException(e); |
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} |
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hasNext = null;
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return data;
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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 FeatureProvider createFeatureProvider() throws DataException { |
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return getFeatureStoreProvider().createFeatureProvider(featureType);
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} |
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protected FeatureProvider getFeatureProvider() throws DataException { |
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FeatureProvider data = createFeatureProvider(); |
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getJDBCStoreProvider().loadFeatureProvider(data, resultSetID); |
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return data;
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} |
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@Override
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protected void doDispose() throws BaseException { |
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if (resultSetID >= 0){ |
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this.close();
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} |
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this.featureType = null; |
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} |
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protected void close() { |
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try {
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this.set.removeResulsetReference(resultSetID);
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getJDBCStoreProvider().closeResulset(resultSetID); |
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resultSetID = -1;
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} catch (DataException e) {
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throw new RuntimeException(e); |
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} |
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} |
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} |