Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 {{Company}}   {{Task}}

 */

package org.gvsig.fmap.dal.feature.spi.memory;

import java.util.Iterator;

import java.util.List;

import org.gvsig.fmap.dal.DataStoreParameters;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.FeatureQuery;

import org.gvsig.fmap.dal.feature.FeatureType;

import org.gvsig.fmap.dal.feature.exception.PerformEditingException;

import org.gvsig.fmap.dal.feature.spi.AbstractFeatureStoreProvider;

import org.gvsig.fmap.dal.feature.spi.DefaultFeatureProvider;

import org.gvsig.fmap.dal.feature.spi.FeatureProvider;

import org.gvsig.fmap.dal.feature.spi.FeatureReferenceProviderServices;

import org.gvsig.fmap.dal.feature.spi.FeatureSetProvider;

import org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider;

import org.gvsig.fmap.dal.spi.DataStoreProviderServices;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.exception.BaseException;

/**

 * Abstract implementation for {@link FeatureStoreProvider} for provider that

 * are loaded statically in memory

 * 

 */

public abstract class AbstractMemoryStoreProvider extends

                AbstractFeatureStoreProvider {

        protected List data;

        protected AbstractMemoryStoreProvider(DataStoreParameters params,

                        DataStoreProviderServices storeServices, DynObject metadata) {

                super(params, storeServices, metadata);

        }

        protected AbstractMemoryStoreProvider(DataStoreParameters params,

                        DataStoreProviderServices storeServices) {

                super(params, storeServices);

        }

        public void performChanges(Iterator deleteds, Iterator inserteds, Iterator updateds, Iterator originalFeatureTypesUpdated) throws PerformEditingException {

                throw new UnsupportedOperationException();

        }

        /**

         * Load a {@link FeatureProvider} into memory store.<br>

         * Use this when loading data.

         * 

         * @param data

         */

        public void addFeatureProvider(FeatureProvider data) {

                data.setOID(this.createNewOID());

                this.data.add(data);

        }

        /**

         * Return the current size of the memory store.

         * 

         * @return

         * @throws DataException

         */

        public long getDataSize() throws DataException {

                this.open();

                return this.data.size();

        }

        protected FeatureProvider internalGetFeatureProviderByReference(

                        FeatureReferenceProviderServices reference) throws DataException {

                int oid = ((Long) reference.getOID()).intValue();

                return (FeatureProvider) this.data.get(oid);

        }

        protected FeatureProvider internalGetFeatureProviderByReference(

                        FeatureReferenceProviderServices reference, FeatureType featureType)

                        throws DataException {

        return new MemoryFeatureProviderAttributeMapper(

            (DefaultFeatureProvider) internalGetFeatureProviderByReference(reference),

            featureType);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider#createSet(org.gvsig.fmap.dal.feature.FeatureQuery, org.gvsig.fmap.dal.feature.FeatureType)

         */

        public FeatureSetProvider createSet(FeatureQuery query, FeatureType featureType)

                        throws DataException {

                this.open();

                return new MemoryFeatureSet(this, query, featureType, this.data);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.feature.spi.AbstractFeatureStoreProvider#createFeatureProvider(org.gvsig.fmap.dal.feature.FeatureType)

         */

        public FeatureProvider createFeatureProvider(FeatureType featureType)throws DataException  {

                this.open();

                return new DefaultFeatureProvider(featureType);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider#getFeatureCount()

         */

        public long getFeatureCount() throws DataException {

                return data.size();

        }

        protected AbstractMemoryStoreProvider getMemoryProvider() {

                return this;

        }

        protected void doDispose() throws BaseException {

                super.doDispose();

                data = null;

        }

}