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

import java.util.Iterator;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataServerExplorer;

import org.gvsig.fmap.dal.DataStoreParameters;

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

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

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

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

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

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

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

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

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

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

import org.gvsig.fmap.dal.resource.ResourceManager;

import org.gvsig.fmap.dal.resource.spi.ResourceManagerProviderServices;

import org.gvsig.fmap.dal.resource.spi.ResourceProvider;

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

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.tools.dynobject.DelegatedDynObject;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.dynobject.exception.DynFieldNotFoundException;

import org.gvsig.tools.dynobject.exception.DynMethodException;

public abstract class AbstractFeatureStoreProvider implements

                FeatureStoreProvider {

        private FeatureStoreProviderServices store;

        private DelegatedDynObject metadata;

        private DataStoreParameters parameters;

        /**

         * Default Constructor.

         *

         * @param params

         * @param storeServices

         * @param metadata

         */

        protected AbstractFeatureStoreProvider(DataStoreParameters params,

                        DataStoreProviderServices storeServices, DynObject metadata) {

                this.store = (FeatureStoreProviderServices) storeServices;

                this.metadata = (DelegatedDynObject) metadata;

                this.parameters = params;

        }

        /**

         * Constructor when cannot create metada in constrution time. <br>

         * <br>

         * <strong>Note: </strong> Don't use it if not is necesary. Set metada

         * <strong>as soon as posible</strong> by

         * {@link AbstractFeatureStoreProvider#setMetadata(DynObject)}

         *

         * @param params

         * @param storeServices

         */

        protected AbstractFeatureStoreProvider(DataStoreParameters params,

                        DataStoreProviderServices storeServices) {

                this.store = (FeatureStoreProviderServices) storeServices;

                this.metadata = null;

                this.parameters = params;

        }

        /**

         * Set metada container if this not set at construction time and only in one

         * time. In other case an Exception will be throw

         *

         * @param metadata

         */

        protected void setMetadata(DynObject metadata) {

                if (this.metadata != null) {

                        // FIXME Exception

                        throw new IllegalStateException();

                }

                this.metadata = (DelegatedDynObject) metadata;

        }

        /**

         * @return the parameters

         */

        public DataStoreParameters getParameters() {

                return parameters;

        }

        /**

         * Create or get a resource of <code>type</code> for <code>params</code> in

         * {@link ResourceManager}

         *

         * @param type

         * @param params

         * @return

         * @throws InitializeException

         */

        protected ResourceProvider createResource(String type, Object[] params)

                        throws InitializeException {

                ResourceManagerProviderServices manager = (ResourceManagerProviderServices) DALLocator

                                .getResourceManager();

                ResourceProvider resource = manager.createResource(type, params);

                return resource;

        }

        /*

         * (non-Javadoc)

         *

         * @see

         * org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider#getStoreServices()

         */

        public FeatureStoreProviderServices getStoreServices() {

                return this.store;

        }

        public FeatureStore getFeatureStore() {

                return this.store.getFeatureStore();

        }

        /**

         * unsupported by default, override this otherwise

         *

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

         */

        public boolean allowWrite() {

                return false;

        }

        /**

         * unsupported by default, override this otherwise

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider#performChanges(Iterator,

         *      Iterator, Iterator, Iterator)

         */

        public void performChanges(Iterator deleteds, Iterator inserteds,

                        Iterator updateds, Iterator featureTypesChanged)

                        throws DataException {

                // FIXME exception

                throw new UnsupportedOperationException();

        }

        /**

         * unsupported by default, override this otherwise

         *

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

         */

        public boolean isLocksSupported() {

                return false;

        }

        /**

         * Default Factory of {@link FeatureProvider}. Create a new default

         * {@link FeatureProvider} instance.<br>

         *

         * Override this if you need an special implemtation of

         * {@link FeatureProvider}.

         *

         * @return

         * @throws DataException

         *

         * @see {@link org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider#createFeatureProvider(FeatureType)}

         */

        public FeatureProvider createFeatureProvider(FeatureType type)

                        throws DataException {

                return this.store.createDefaultFeatureProvider(type);

        }

        /**

         * unsupported by default (return <code>null</code>), override this

         * otherwise

         *

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

         */

        public FeatureLocks createFeatureLocks() throws DataException {

                return null;

        }

        /**

         * Default Factory of {@link FeatureSelection}. Create a new default

         * {@link FeatureSelection} instance.<br>

         *

         * Override this if you need an special implemtation of

         * {@link FeatureSelection}.

         *

         * @return

         * @throws DataException

         *

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

         */

        public FeatureSelection createFeatureSelection() throws DataException {

                return this.store.createDefaultFeatureSelection();

        }

        /**

         * do nothing by default, override this otherwise

         *

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

         */

        public void refresh() throws OpenException {

                // Do nothing by default

        }

        /**

         * do nothing by default, override this otherwise

         *

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

         */

        public void close() throws CloseException {

                // Do nothing by default

        }

        public void dispose() throws CloseException {

                this.metadata = null;

                this.store = null;

        }

        /**

         * unsupported geometry by default (return <code>null</code>), override this

         * otherwise

         *

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

         */

        public Envelope getEnvelope() throws DataException {

                return null;

        }

        /**

         * unsupported geometry write by default (return <code>false</code>),

         * override this otherwise

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider#canWriteGeometry(int,

         *      int)

         */

        public boolean canWriteGeometry(int geometryType, int geometrySubType)

                        throws DataException {

                return false;

        }

        // --- Metadata methods ---

        public void delegate(DynObject dynObject) {

                if (this.metadata == null) {

                        return;

                }

                this.metadata.delegate(dynObject);

        }

        public DynClass getDynClass() {

                if (this.metadata == null) {

                        return null;

                }

                return this.metadata.getDynClass();

        }

        public Object getDynValue(String name) throws DynFieldNotFoundException {

                if (this.metadata == null) {

                        return null;

                }

                // TODO this.open??

                return this.metadata.getDynValue(name);

        }

        public boolean hasDynValue(String name) {

                if (this.metadata == null) {

                        return false;

                }

                // TODO this.open??

                return this.metadata.hasDynValue(name);

        }

        public void implement(DynClass dynClass) {

                if (this.metadata == null) {

                        return;

                }

                this.metadata.implement(dynClass);

        }

        public Object invokeDynMethod(int code, DynObject context)

                        throws DynMethodException {

                if (this.metadata == null) {

                        return null;

                }

                // TODO this.open??

                return this.metadata.invokeDynMethod(this, code, context);

        }

        public Object invokeDynMethod(String name, DynObject context)

                        throws DynMethodException {

                if (this.metadata == null) {

                        return null;

                }

                // TODO this.open??

                return this.metadata.invokeDynMethod(this, name, context);

        }

        public void setDynValue(String name, Object value)

                        throws DynFieldNotFoundException {

                if (this.metadata == null) {

                        return;

                }

                // TODO this.open??

                this.metadata.setDynValue(name, value);

        }

        // --- end Metadata methods ---

        /**

         * unsupported by default, override this otherwise

         *

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

         */

        public boolean allowAutomaticValues() {

                return false;

        }

        /**

         * unsupported by default, override this otherwise

         *

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

         *      fmap.dal.feature.spi.FeatureProvider)

         */

        public void append(FeatureProvider featureProvider) throws DataException {

                // FIXME exception

                throw new UnsupportedOperationException();

        }

        /**

         * unsupported by default, override this otherwise

         *

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

         */

        public void beginAppend() throws DataException {

                // FIXME exception

                throw new UnsupportedOperationException();

        }

        /**

         * unsupported by default, override this otherwise

         *

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

         */

        public void endAppend() throws DataException {

                // FIXME exception

                throw new UnsupportedOperationException();

        }

        /**

         * unsupported by default, override this otherwise

         *

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

         */

        public boolean supportsAppendMode() {

                return false;

        }

        /**

         * unsupported by default (return null), override this otherwise

         *

         * @see org.gvsig.fmap.dal.spi.DataStoreProvider#getChilds()

         */

        public Iterator getChilds() {

                return null;

        }

        /**

         * unsupported by default (return null), override this otherwise

         *

         * @see org.gvsig.fmap.dal.spi.DataStoreProvider#getExplorer()

         */

        public DataServerExplorer getExplorer() throws ReadException,

                        ValidateDataParametersException {

                return null;

        }

}