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 IVER T.I. S.A.   {{Task}}

 */

package org.gvsig.fmap.dal;

import java.util.List;

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

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

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

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

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

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

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

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

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

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

import org.gvsig.fmap.dal.feature.paging.FeaturePagingHelper;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.exception.BaseException;

/**

 * There are two top level management roles within DAL: data access and resource management.

 *

 * This class is responsible of the data access management role. It provides ways

 * for registering and instantiating {@link DataServerExplorer}(s), {@link DataStore}(s),

 * {@link Evaluator}(s) and {@link FeatureIndex}(es).

 *

 * @see ResourceManager

 *

 */

public interface DataManager {

        /**

         * Returns the default DAL's temporary directory

         *

         * @return Temporary directory name

         */

        public String getTemporaryDirectory();

        /*

         * ====================================================================

         *

         * Store related services

         */

        /**

         * Creates, initializes and returns an instance of DataStoreParameters given

         * the name with which their provider is registered.

         * 

         * @param name

         *            provider name

         * 

         * @throws ProviderNotRegisteredException

         *             if the memory provider is not registered

         * @throws InitializeException

         *             if there is an error initializing the parameters for the

         *             memory provider

         **/

        public DataStoreParameters createStoreParameters(String name)

                        throws InitializeException, ProviderNotRegisteredException;

        /**

         * 

         * Creates, initializes and returns an instance of NewDataStoreParameters

         * given the name with which their provider is registered.

         * 

         * @param name

         * 

         * @throws InitializeException

         * @throws ProviderNotRegisteredException

         */

        public NewDataStoreParameters createNewStoreParameters(String explorer, String provider)

                        throws InitializeException, ProviderNotRegisteredException;

        /**

         * 

         * Creates, initializes and returns an instance of DataStore given the

         * DataStoreParameters.

         * 

         * @param parameters

         *            parameters used to instantiate and initialize the DataStore

         * 

         * @throws ProviderNotRegisteredException

         *             if the memory provider is not registered

         * @throws InitializeException

         *             if there is an error initializing the parameters for the

         *             memory provider

         * @throws ValidateDataParametersException

         *             if the parameters to open the memory based store are not

         *             valid

         */

        public DataStore openStore(String provider, DataStoreParameters parameters)

                        throws InitializeException, ProviderNotRegisteredException,

                        ValidateDataParametersException;

        /**

         * @deprecated see openStore

         */

        public DataStore createStore(DataStoreParameters parameters)

                        throws InitializeException, ProviderNotRegisteredException,

                        ValidateDataParametersException;

        /**

         * Create a new physical store 

         *  

         * @param parameters

         *

         * @throws InitializeException

         * @throws ProviderNotRegisteredException

         * @throws ValidateDataParametersException

         */

        public void newStore(String explorer, String provider, NewDataStoreParameters parameters, boolean overwrite)

                        throws InitializeException, ProviderNotRegisteredException,

                        ValidateDataParametersException;

        /**

         * Returns a list of Strings containing the names of all available DataStore

         * providers.

         *

         * @return list of String containing available DataStore provider names

         */

        public List getStoreProviders();

        /**

         * Returns a list of Strings containing the names of all available DataStore

         * providers for an explorer.

         * 

         * @param explorer

         *            name

         */

        public List getStoreProviders(String name);

        /*

         * ====================================================================

         *

         * Explorer related services

         */

        /**

         * Returns an instance of {@link DataServerExplorerParameters} corresponding to

         * the given name.

         *

         * @param name

         *            name of a registered server explorer provider

         *

         * @throws InitializeException

         *                         if parameter initialization causes an error.

         *

         * @throws ProviderNotRegisteredException

         *                         if could not find a provider by the given name.

         *

         **/

        public DataServerExplorerParameters createServerExplorerParameters(

                        String name)

                        throws InitializeException, ProviderNotRegisteredException;

        /**

         * Returns an instance of {@link DataServerExplorer} given its parameters.

         *

         * @param parameters

         *            parameters used to instantiate and initialize the

         *            {@link DataServerExplorer}.

         *

         * @return an instance of {@link DataServerExplorer}.

         *

         * @throws InitializeException

         *

         * @throws ProviderNotRegisteredException

         * @throws ValidateDataParametersException

         */

        public DataServerExplorer openServerExplorer(

                        String name,

                        DataServerExplorerParameters parameters)

                        throws InitializeException, ProviderNotRegisteredException,

                        ValidateDataParametersException;

        /**

         * @deprecated see openServerExplorer

         */

        public DataServerExplorer createServerExplorer(

                        DataServerExplorerParameters parameters)

                        throws InitializeException, ProviderNotRegisteredException,

                        ValidateDataParametersException;

        /**

         * Returns a list of String containing the names of the available

         * DataServerExplorer providers.

         *

         * @return list of String containing the names of the available

         *         DataServerExplorer providers.

         */

        public List getExplorerProviders();

        /*

         * ====================================================================

         *

         * Expression evaluation related services

         */

        /**

         * Registers the default expression evaluator. It is used by DAL to evaluate

         * and resolve query filters and expressions.

         *

         * @param evaluator

         *            Class that will be called to evaluate the expression. It must

         *            implement {@link Evaluator}.

         */

        public void registerDefaultEvaluator(Class evaluator);

        /**

         * Creates an instance of Evaluator that represents the given expression.

         *

         * @param expression

         *            String containing a CQL expression.

         * @return instance of Evaluator representing the given expression.

         * @throws InitializeException

         */

        public Evaluator createExpresion(String expression)

                        throws InitializeException;

        /*

         * ====================================================================

         *

         * Index related services

         */

        /**

         * Returns a list of String containing the names of the available index providers.

         *

         * @return

         *                 list of strings with the names of the available index providers

         */

        public List getFeatureIndexProviders();

        /**

         * Sets the default DataIndexProvider for the given data type.

         *

         * @param dataType

         *                                 one of the data types defined in {@link DataTypes}.

         * @param name

         *                         Provider's name

         */

    public void setDefaultFeatureIndexProviderName(int dataType, String name);

        /**

         * Returns the default DataIndexProvider name, given a data type. Data types

         * are defined in {@link DataTypes}.

         *

         * @param dataType

         *            one of the constants in {@link DataTypes}.

         *

         * @return

         *                 the name of the default {@link FeatureIndexProvider} if there is

         *                 anyone available for the given data type.

         */

    public String getDefaultFeatureIndexProviderName(int dataType);

    /**

         * Returns a list of String containing the names of the available cache providers.

         *

         * @return

         *                 list of strings with the names of the available cache providers

         */    

    public List getFeatureCacheProviders();

        /**

         * Returns an instance of {@link DataServerExplorerParameters} corresponding

         * to the given name used by the cache to create a store to save the

         * retrieved data.

         * 

         * @param name

         *            name of a registered feature cache provider

         * 

         * @throws InitializeException

         *             if parameter initialization causes an error.

         * 

         * @throws ProviderNotRegisteredException

         *             if could not find a cache provider by the given name.

         * 

         */

        public DynObject createCacheParameters(String name)

                        throws InitializeException, ProviderNotRegisteredException;

        /**

         * Utility method to create the {@link DataStoreParameters} to create a

         * {@link FeatureStore} based on the {@link MemoryStoreProvider}.

         * 

         * @param autoOrderAttributeName

         *            the name of the {@link Feature} attribute to be used to order

         *            the store {@link Feature}s by default. Set to null if you

         *            don't want any order by default

         * @return the parameters for the memory based store

         * @throws InitializeException

         *             if there is an error initializing the parameters for the

         *             memory provider

         */

        public DataStoreParameters createMemoryStoreParameters(

                        String autoOrderAttributeName) throws InitializeException;

        /**

         * Utility method to create the a {@link FeatureStore} based on the

         * {@link MemoryStoreProvider}.

         * 

         * @param autoOrderAttributeName

         *            the name of the {@link Feature} attribute to be used to order

         *            the store {@link Feature}s by default. Set to null if you

         *            don't want any order by default

         * @return the the memory based store

         * @throws InitializeException

         *             if there is an error initializing the parameters for the

         *             memory provider

         */

        public FeatureStore createMemoryStore(String autoOrderAttributeName)

                        throws InitializeException;

    /**

     * Creates a {@link FeaturePagingHelper} to paginate data from a

     * {@link FeatureStore}.

     * 

     * @param featureStore

     *            to get the {@link Feature}s from

     * @param pageSize

     *            the page size

     * @return a {@link FeaturePagingHelper}

     * @throws BaseException

     *             if there is an error creating the helper

     */

        public FeaturePagingHelper createFeaturePagingHelper(

        FeatureStore featureStore, int pageSize) throws BaseException;

        /**

     * Creates a {@link FeaturePagingHelper} to paginate data from a

     * {@link FeatureStore}.

     * 

     * @param featureStore

     *            to get the {@link Feature}s from

     * @param featureQuery

     *            to filter and/or order the data

     * @param pageSize

     *            the page size

     * @return a {@link FeaturePagingHelper}

     * @throws BaseException

     *             if there is an error creating the helper

     */

        public FeaturePagingHelper createFeaturePagingHelper(

                        FeatureStore featureStore, FeatureQuery featureQuery, int pageSize)

        throws BaseException;

        public void setOpenErrorHandler(OpenErrorHandler handler);

        public DataStoreProviderFactory getStoreProviderFactory(String name);

        public EditableFeatureType createFeatureType();

        public List getDataTypes();

        /**

         * Registers a class that can be used to create a {@link FeatureAttributeGetter}

         * and associate it to a {@link FeatureAttributeDescriptor}.

         * 

            * @param name

            *             the name used to register the class.

         * @param clazz

         *             it has to be an instance of {@link FeatureAttributeDescriptor}         

         */

        public void registerFeatureAttributeGetter(String name, Class clazz);

        /**

         * Creates a {@link FeatureAttributeGetter} by name. If there is not any class

         * registered with this name or if there is any error an exception is thrown.

         * 

         * @param name

         *             the name that was used to register the class              

         * @return

         *             a {@link FeatureAttributeGetter}

         * @throws InitializeException

         *             if there is any error creating the object

         */

        public FeatureAttributeGetter createFeatureAttributeGetter(String name) throws InitializeException;

}