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 / featureset / DefaultIterator.java @ 44158
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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.featureset; |
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import java.util.Iterator; |
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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.tools.dispose.DisposableIterator; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.impl.DefaultFeature; |
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import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
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import org.gvsig.tools.dispose.impl.AbstractDisposable; |
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import org.gvsig.tools.exception.BaseException; |
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class DefaultIterator extends AbstractDisposable implements DisposableIterator { |
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protected Iterator iterator; |
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protected DefaultFeatureSet fset;
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protected Feature lastFeature = null; |
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public DefaultIterator(DefaultFeatureSet featureSet) {
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this.fset = featureSet;
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} |
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public DefaultIterator(DefaultFeatureSet featureSet, long index, long elements) |
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throws DataException {
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this.fset = featureSet;
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if (index > 0) { |
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if (featureSet.provider.canIterateFromIndex()) {
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try {
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this.iterator = featureSet.provider.iterator(index, elements);
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} catch (UnsupportedOperationException e) { |
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this.iterator = featureSet.provider.iterator();
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skypto(index); |
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} |
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} else {
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this.iterator = featureSet.provider.iterator();
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skypto(index); |
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} |
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} else {
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this.iterator = featureSet.provider.iterator();
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} |
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} |
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protected void skypto(long index) { |
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// TODO: Comprobar si esta bien la condicion de n<=
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for (long n = 0; n <= index && this.getIterator().hasNext(); n++, this |
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.getIterator() |
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.next()) { |
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; |
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} |
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} |
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@Override
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public boolean hasNext() { |
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if (this.fset == null) { |
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return false; |
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} |
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fset.checkSourceStoreModified(); |
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if (this.getIterator().hasNext()) { |
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return true; |
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} |
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try {
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this.doDispose();
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} catch (BaseException ex) {
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throw new RuntimeException("Can't dispose iterator.",ex); |
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} |
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return false; |
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} |
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@Override
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public Object next() { |
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if( fset == null ) { |
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throw new NoSuchElementException(); |
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} |
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fset.checkSourceStoreModified(); |
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lastFeature = null;
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if (!this.hasNext()) { |
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throw new NoSuchElementException(); |
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} |
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try {
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lastFeature = this.createFeature((FeatureProvider) this.getIterator() |
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.next()); |
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return lastFeature;
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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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public void remove() { |
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if (!fset.store.isEditing()) {
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throw new UnsupportedOperationException(); |
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} |
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if (lastFeature == null) { |
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throw new IllegalStateException(); |
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} |
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try {
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this.fset.delete(this.lastFeature); |
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} catch (DataException e) {
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// FIXME Cambiar excepcion a una Runtime de DAL
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throw new RuntimeException(e); |
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} |
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lastFeature = null;
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} |
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protected DefaultFeature createFeature(FeatureProvider fData)
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throws DataException {
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fData.setNew(false);
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if (this.fset.transform.isEmpty()) { |
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return new DefaultFeature(fset.store, fData); |
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} else {
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return (DefaultFeature) this.fset.transform.applyTransform( |
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new DefaultFeature(fset.store, fData), fset
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.getDefaultFeatureType()); |
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} |
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} |
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protected Iterator getIterator() { |
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return this.iterator; |
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} |
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protected boolean isDeletedOrHasToSkip(FeatureProvider data) { |
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return false; |
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} |
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protected void doNext() throws DataException { |
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} |
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protected void doDispose() throws BaseException { |
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if (iterator instanceof DisposableIterator){ |
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((DisposableIterator)this.iterator).dispose();
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} |
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this.iterator = null; |
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this.fset = null; |
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this.lastFeature = null; |
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} |
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} |