Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.fmap.dal.impl;

import org.gvsig.fmap.dal.ExternalStoreProviderFactory;

import java.io.File;

import java.lang.reflect.InvocationTargetException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

import org.gvsig.fmap.dal.DataServerExplorer;

import org.gvsig.fmap.dal.DataServerExplorerParameters;

import org.gvsig.fmap.dal.DataServerExplorerPool;

import org.gvsig.fmap.dal.DataStore;

import org.gvsig.fmap.dal.DataStoreFactory;

import org.gvsig.fmap.dal.DataStoreParameters;

import org.gvsig.fmap.dal.DataStoreProviderFactory;

import org.gvsig.fmap.dal.NewDataStoreParameters;

import org.gvsig.fmap.dal.OpenErrorHandler;

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

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.FeatureAttributeDescriptor;

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

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

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

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

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

import org.gvsig.fmap.dal.feature.impl.DefaultEditableFeatureType;

import org.gvsig.fmap.dal.feature.impl.DefaultFeatureIndex;

import org.gvsig.fmap.dal.feature.impl.DefaultFeatureStore;

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

import org.gvsig.fmap.dal.feature.paging.impl.FeaturePagingHelperImpl;

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

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

import org.gvsig.fmap.dal.feature.spi.cache.FeatureCacheProvider;

import org.gvsig.fmap.dal.feature.spi.cache.FeatureCacheProviderFactory;

import org.gvsig.fmap.dal.feature.spi.index.FeatureIndexProvider;

import org.gvsig.fmap.dal.feature.spi.index.FeatureIndexProviderServices;

import org.gvsig.fmap.dal.raster.RasterStoreProviderFactory;

import org.gvsig.fmap.dal.raster.spi.CoverageStoreProvider;

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

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

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

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

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

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

import org.gvsig.fmap.dal.store.memory.MemoryStoreParameters;

import org.gvsig.fmap.dal.store.memory.MemoryStoreProvider;

import org.gvsig.fmap.geom.DataTypes;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dataTypes.DataTypesManager;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.dynobject.DynObjectEncoder;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.dynobject.DynStruct_v2;

import org.gvsig.tools.dynobject.Tags;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.exception.BaseException;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPoint.Extension;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

import org.gvsig.tools.identitymanagement.SimpleIdentityManager;

import org.gvsig.tools.identitymanagement.UnauthorizedException;

import org.gvsig.tools.operations.OperationManager;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class DefaultDataManager implements DataManager,

    DataManagerProviderServices {

    private static final Logger logger = LoggerFactory.getLogger(DefaultDataManager.class);

    final static private String DATA_MANAGER_STORE = "Data.manager.stores";

    final static private String DATA_MANAGER_STORE_DESCRIPTION =

        "DAL stores providers";

    final static private String DATA_MANAGER_STORE_PARAMS =

        "Data.manager.stores.params";

    final static private String DATA_MANAGER_STORE_PARAMS_DESCRIPTION =

        "DAL stores providers parameters";

    final static private String DATA_MANAGER_EXPLORER =

        "Data.manager.explorers";

    final static private String DATA_MANAGER_EXPLORER_DESCRIPTION =

        "DAL explorers providers";

    final static private String DATA_MANAGER_EXPLORER_PARAMS =

        "Data.manager.explorers.params";

    final static private String DATA_MANAGER_EXPLORER_PARAMS_DESCRIPTION =

        "DAL explorer providers parameters";

    final static private String DATA_MANAGER_INDEX = "Data.manager.indexes";

    final static private String DATA_MANAGER_INDEX_DESCRIPTION =

        "DAL index providers";

    final static private String DATA_MANAGER_CACHE = "Data.manager.caches";

    final static private String DATA_MANAGER_CACHE_DESCRIPTION =

        "DAL cache providers";

    final static private String DATA_MANAGER_EXPRESION_EVALUATOR =

        "Data.manager.expresion.evaluator";

    final static private String DATA_MANAGER_EXPRESION_EVALUATOR_DEFAULT =

        "default";

    final static private String DATA_MANAGER_EXPRESION_EVALUATOR_DESCRIPTION =

        "DAL expresion evaluators.";

    final static private String DATA_MANAGER_STORE_FACTORY =

        "Data.manager.stores.factory";

    final static private String DATA_MANAGER_STORE_FACTORY_DESCRIPTION =

        "DAL stores factories";

    final static private String DATA_MANAGER_STORE_PROVIDER_FACTORY =

        "Data.manager.providers.factory";

    final static private String DATA_MANAGER_STORE_PROVIDER_FACTORY_DESCRIPTION =

        "DAL store provider factories";

    final static private String DATA_MANAGER_FEATURE_ATTTRIBUTE_GETTER = 

        "Data.manager.feature.attribute.getter";

    final static private String DATA_MANAGER_FEATURE_ATTTRIBUTE_GETTER_DESCRIPTION = 

        "DAL feature attribute getters";

    /** This map contains the name of the default provider for each data type */

    private Map defaultDataIndexProviders;

    private OpenErrorHandler openErrorHandler;

    private List dataTypes;

    private DataServerExplorerPool dataServerExplorerPool = null;

    public DefaultDataManager() {

        /*

         * Create te extensions point in te registry.

         */

        ToolsLocator.getExtensionPointManager().add(DATA_MANAGER_STORE,

            DATA_MANAGER_STORE_DESCRIPTION);

        ToolsLocator.getExtensionPointManager().add(DATA_MANAGER_STORE_PARAMS,

            DATA_MANAGER_STORE_PARAMS_DESCRIPTION);

        ToolsLocator.getExtensionPointManager().add(DATA_MANAGER_EXPLORER,

            DATA_MANAGER_EXPLORER_DESCRIPTION);

        ToolsLocator.getExtensionPointManager().add(

            DATA_MANAGER_EXPLORER_PARAMS,

            DATA_MANAGER_EXPLORER_PARAMS_DESCRIPTION);

        ToolsLocator.getExtensionPointManager().add(DATA_MANAGER_INDEX,

            DATA_MANAGER_INDEX_DESCRIPTION);

        ToolsLocator.getExtensionPointManager().add(

            DATA_MANAGER_EXPRESION_EVALUATOR,

            DATA_MANAGER_EXPRESION_EVALUATOR_DESCRIPTION);

        ToolsLocator.getExtensionPointManager().add(

            DATA_MANAGER_STORE_PROVIDER_FACTORY,

            DATA_MANAGER_STORE_PROVIDER_FACTORY_DESCRIPTION);

        initializeIndexes();

    }

    /**

     * 

     * @return ResourceManager

     */

    public ResourceManager getResourceManager() {

        return DALLocator.getResourceManager();

    }

    public OperationManager getOperationManager() {

        return ToolsLocator.getOperationManager();

    }

    public String getTemporaryDirectory() {

        // FIXME Define a better tempdir solution

        String tmp = System.getProperty("TMP");

        if (tmp == null) {

            tmp = System.getProperty("TEMP");

        }

        if (tmp == null) {

            File tmp_file = new File(System.getProperty("HOME"), "_daltmp_");

            int i = 1;

            while (!tmp_file.exists() || !tmp_file.isDirectory()) {

                tmp_file = new File(tmp_file.getAbsolutePath() + i);

                i++;

            }

            if (!tmp_file.exists()) {

                tmp_file.mkdir();

            }

            tmp = tmp_file.getAbsolutePath();

        }

        return tmp;

    }

    /*

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

     * 

     * Store related services

     */

    @Override

    public void registerStoreProvider(String name, Class storeProviderClass,

        Class parametersClass) {

        if (name == null || storeProviderClass == null || parametersClass == null) {

            throw new IllegalArgumentException("Any parameters can be null");

        }

        if (!DataStoreParameters.class.isAssignableFrom(parametersClass)) {

            throw new IllegalArgumentException(parametersClass.getName()

                + " must implement org.gvsig.fmap.dal.DataStoreParameters");

        }

        if (CoverageStoreProvider.class.isAssignableFrom(storeProviderClass)) {

            // Envuelve al proveedor en una factoria por defecto.

            this.registerStoreProviderFactory(new DataStoreProviderToCoverageProviderFactoryWrapper(

                name, "", storeProviderClass, parametersClass));

            return;

        }

        if (FeatureStoreProvider.class.isAssignableFrom(storeProviderClass)) {

            // Envuelve al proveedor en una factoria por defecto.

            this.registerStoreProviderFactory(new DataStoreProviderToFeatureStoreProviderFactoryWrapper(

                name, "", storeProviderClass, parametersClass));

            return;

        }

        throw new IllegalArgumentException("Not supported implemtation: name="

            + name + " provider class=" + storeProviderClass.getName());

    }

    public void registerStoreProviderFactory(DataStoreProviderFactory factory) {

        ExtensionPoint factories =

            ToolsLocator.getExtensionPointManager().add(

                DATA_MANAGER_STORE_PROVIDER_FACTORY,

                DATA_MANAGER_STORE_PROVIDER_FACTORY_DESCRIPTION);

        factories.append(factory.getName(), factory.getDescription(), factory);

    }

    public void registerStoreFactory(String name, Class storeProviderClass) {

        if (name == null || storeProviderClass == null) {

            // FIXME Exception

            throw new IllegalArgumentException("Any parameters can be null");

        }

        if (!(DataStoreFactory.class.isAssignableFrom(storeProviderClass))) {

            // FIXME Exception

            throw new IllegalArgumentException(

                "Not supported implemtation: name=" + name + " provider class="

                    + storeProviderClass.getName());

        }

        ToolsLocator

            .getExtensionPointManager()

            .add(DATA_MANAGER_STORE_FACTORY,

                DATA_MANAGER_STORE_FACTORY_DESCRIPTION)

            .append(name, null, storeProviderClass);

    }

    public DataStoreParameters createStoreParameters(String name)

        throws InitializeException, ProviderNotRegisteredException {

        try {

            // Si hay una factoria para ese proveedor se los pedimos a la

            // factoria

            DataStoreProviderFactory providerFactory =

                (DataStoreProviderFactory) ToolsLocator

                    .getExtensionPointManager()

                    .get(DATA_MANAGER_STORE_PROVIDER_FACTORY).create(name);

            if (providerFactory != null) {

                return (DataStoreParameters) providerFactory.createParameters();

            }

            // Si no hay factoria lo hacemos como se hacia antes por mantener

            // compatibilidad.

            DataStoreParameters params =

                (DataStoreParameters) ToolsLocator.getExtensionPointManager()

                    .get(DATA_MANAGER_STORE_PARAMS).create(name);

            if (params == null) {

                throw new ProviderNotRegisteredException(name);

            }

            return params;

        } catch (InstantiationException e) {

            throw new InitializeException(e);

        } catch (IllegalAccessException e) {

            throw new InitializeException(e);

        } catch (SecurityException e) {

            throw new InitializeException(e);

        } catch (IllegalArgumentException e) {

            throw new InitializeException(e);

        }

    }

    public DataStoreParameters toDataStoreParameters(String provider, DynObject doparams) throws InitializeException, ProviderNotRegisteredException {

        if (doparams instanceof DataStoreParameters) {

            return (DataStoreParameters) doparams;

        }

        String providerName;

        try {

            providerName = (String) doparams.getDynValue(DataStoreProviderServices.PROVIDER_PARAMTER_NAME);

        } catch(Exception ex) {

            providerName = provider;

        }

        DataStoreParameters parameters = DALLocator.getDataManager().createStoreParameters(providerName);

        ToolsLocator.getDynObjectManager().copy(doparams, parameters);

        return parameters;

    }

    private DataStore localOpenStore(String provider,

        DynObject doparameters) throws InitializeException,

        ProviderNotRegisteredException, ValidateDataParametersException {

        DataStoreParameters parameters = toDataStoreParameters(provider, doparameters);

        SimpleIdentityManager identityManager = ToolsLocator.getIdentityManager();

        if( ! identityManager.getCurrentIdentity().isAuthorized(READ_STORE_AUTHORIZATION, parameters, provider) ) {

            throw new UnauthorizedException(READ_STORE_AUTHORIZATION, parameters, provider);

        }

        // Usa el DynObjectEncoder y no el toString para poder ver los parametros aunque

        // el proveedor de datos sobreescriba el metodo toString.

        DynObjectEncoder encoder = ToolsLocator.getDynObjectManager().createSimpleDynObjectEncoder();

        logger.info("openStore('{}','{}')", provider, encoder.encode(parameters));

        String name = provider; 

        parameters.validate();

        DataStoreProviderFactory providerFactory = this.getStoreProviderFactory(name);

        if( providerFactory == null ) {

            throw new CantFindTheProviderFactoryException(name);

        }

        if( providerFactory instanceof FeatureStoreProviderFactory ) {

            DataStore store = this.createDefaultFeatureStore();

            this.intializeDataStore(store, parameters);

            return store;

        } else if( providerFactory instanceof RasterStoreProviderFactory ) {

            DataStore store = this.createDefaultRasterStore();

            this.intializeDataStore(store, parameters);

            return store;

        } else if( providerFactory instanceof ExternalStoreProviderFactory ) {

            DataStoreFactory factory = this.getStoreFactory(name);

            factory.setParameters(parameters);

            DataStore store = factory.createStore();

            this.intializeDataStore(store, parameters);

            return store;

        }

        throw new UnsupportedProviderFactoryException(name,providerFactory);

    }

    private static class UnsupportedProviderFactoryException extends InitializeException {

        private static final long serialVersionUID = 2635455949723618046L;

        public UnsupportedProviderFactoryException(String resourceName,DataStoreProviderFactory providerFactory) {

		super("Error intializing resource '%(resource)'. Unsupported provider factory '%(factory).", 

                    "_UnsupportedProviderFactoryException", 

                    serialVersionUID

                );

		setValue("resource", resourceName);

		setValue("factory", providerFactory.getClass().getName());

        }

    }

    private static class CantFindTheProviderFactoryException extends InitializeException {

        private static final long serialVersionUID = -2736434434177690011L;

        public CantFindTheProviderFactoryException(String resourceName) {

		super("Error intializing resource '%(resource)'. Can't find provider factory for this resource.", 

                    "_CantFindTheProviderFactoryException", 

                    serialVersionUID

                );

		setValue("resource", resourceName);

        }

    }

    private DataStore createDefaultFeatureStore() {

        return new DefaultFeatureStore();

    }

    private DataStore createDefaultRasterStore() {

        try {

            return (DataStore) this.defaultRasterStoreClass.newInstance();

        } catch (InstantiationException | IllegalAccessException ex) {

            throw new RuntimeException("Can't create the default RasterStore", ex);

        }

    }

    private Class defaultRasterStoreClass = null;

    public void registerDefaultRasterStore(Class rasterStoreClass) {

        this.defaultRasterStoreClass = rasterStoreClass;

    }

    private DataStoreFactory getStoreFactory(String name) throws InitializeException {

        ExtensionPoint.Extension point =

            ToolsLocator.getExtensionPointManager()

                .get(DATA_MANAGER_STORE_FACTORY).get(name);

        try {

            DataStoreFactory factory = (DataStoreFactory) point.create();

            return factory;

        } catch (InstantiationException | IllegalAccessException e) {

            throw new InitializeException(e);

        }

    }

    public DataStore openStore(String provider, DynObject parameters)

        throws InitializeException, ProviderNotRegisteredException,

        ValidateDataParametersException {

        return localOpenStore(provider, parameters);

    }

    @Override

    public DataStore openStore(String provider, DataStoreParameters parameters) throws InitializeException, ProviderNotRegisteredException, ValidateDataParametersException {

        return localOpenStore(provider, parameters);

    }

    /**

     * @deprecated see openStore

     */

    public DataStore createStore(DynObject doparameters)

        throws InitializeException, ProviderNotRegisteredException,

        ValidateDataParametersException {

        DataStoreParameters parameters = toDataStoreParameters(null,doparameters);

        return openStore(parameters.getDataStoreName(), parameters);

    }

    /**

     * @deprecated see openStore

     */

    @Override

    public DataStore createStore(DataStoreParameters parameters) throws InitializeException, ProviderNotRegisteredException, ValidateDataParametersException {

        return this.openStore(parameters.getDataStoreName(), parameters);

    }

    public List getStoreProviders() {

        ExtensionPointManager epmanager =

            ToolsLocator.getExtensionPointManager();

        List names1 = epmanager.get(DATA_MANAGER_STORE).getNames();

        List names2 =

            epmanager.get(DATA_MANAGER_STORE_PROVIDER_FACTORY).getNames();

        List names3 = new ArrayList();

        names3.addAll(names1);

        names3.addAll(names2);

        return names3;

    }

    @Override

    public DataStoreProviderFactory getStoreProviderFactory(String name) {

        try {

            return (DataStoreProviderFactory) ToolsLocator

                .getExtensionPointManager()

                .get(DATA_MANAGER_STORE_PROVIDER_FACTORY).create(name);

        } catch (InstantiationException | IllegalAccessException e) {

            return null;

        }

    }

    public List getStoreProviders(String name) {

        return getStoreProviders(); // FIXME: need filter from the name of

        // the explorer

    }

    public NewDataStoreParameters createNewStoreParameters(String explorer,

        String provider) throws InitializeException,

        ProviderNotRegisteredException {

        DataServerExplorerParameters parameters;

        DataServerExplorer server;

        try {

            parameters = this.createServerExplorerParameters(explorer);

            server =

                this.openServerExplorerWithoutValidate(explorer, parameters);

            return server.getAddParameters(provider);

        } catch (ValidateDataParametersException e) {

            throw new InitializeException(e);

        } catch (DataException e) {

            throw new InitializeException(e);

        }

    }

    public void newStore(String explorer, String provider,

        NewDataStoreParameters parameters, boolean overwrite)

        throws InitializeException, ProviderNotRegisteredException,

        ValidateDataParametersException {

        SimpleIdentityManager identityManager = ToolsLocator.getIdentityManager();

        if( ! identityManager.getCurrentIdentity().isAuthorized(CREATE_STORE_AUTHORIZATION, parameters, provider) ) {

            throw new UnauthorizedException(CREATE_STORE_AUTHORIZATION, parameters, provider);

        }

        parameters.validate();

        DataServerExplorerParameters explorerParameters;

        DataServerExplorer server;

        explorerParameters = this.createServerExplorerParameters(explorer);

        server =

            this.openServerExplorerWithoutValidate(explorer, explorerParameters);

        try {

            server.add(provider, parameters, overwrite);

        } catch (DataException e) {

            throw new InitializeException(e);

        }

    }

    /*

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

     * 

     * Explorer related services

     */

    public void registerExplorerProvider(String name, Class explorerClass,

        Class parametersClass) {

        if (name == null || explorerClass == null || parametersClass == null) {

            // FIXME Exception

            throw new IllegalArgumentException("Any parameters can be null");

        }

        if (!DataServerExplorerParameters.class

            .isAssignableFrom(parametersClass)) {

            // FIXME Exception

            throw new IllegalArgumentException(

                parametersClass.getName()

                    + " must implement org.gvsig.fmap.dal.DataServerExplorerParameters");

        }

        if (!DataServerExplorer.class.isAssignableFrom(explorerClass)) {

            // FIXME Exception

            throw new IllegalArgumentException(explorerClass.getName()

                + " must implement org.gvsig.fmap.dal.DataServerExplorer");

        }

        ToolsLocator.getExtensionPointManager()

            .add(DATA_MANAGER_EXPLORER, DATA_MANAGER_EXPLORER_DESCRIPTION)

            .append(name, null, explorerClass);

        ToolsLocator

            .getExtensionPointManager()

            .add(DATA_MANAGER_EXPLORER_PARAMS,

                DATA_MANAGER_EXPLORER_PARAMS_DESCRIPTION)

            .append(name, null, parametersClass);

    }

    public DataServerExplorerParameters createServerExplorerParameters(

        String name) throws InitializeException, ProviderNotRegisteredException {

        try {

            DataServerExplorerParameters params =

                (DataServerExplorerParameters) ToolsLocator

                    .getExtensionPointManager()

                    .get(DATA_MANAGER_EXPLORER_PARAMS).create(name);

            if (params == null) {

                throw new ProviderNotRegisteredException(name);

            }

            return params;

        } catch (InstantiationException e) {

            throw new InitializeException(e);

        } catch (IllegalAccessException e) {

            throw new InitializeException(e);

        } catch (SecurityException e) {

            throw new InitializeException(e);

        } catch (IllegalArgumentException e) {

            throw new InitializeException(e);

        }

    }

    public DataServerExplorer openServerExplorer(String explorer,

        DataServerExplorerParameters parameters) throws InitializeException,

        ProviderNotRegisteredException, ValidateDataParametersException {

        if (parameters != null) {

            parameters.validate();

        }

        return this.openServerExplorerWithoutValidate(explorer, parameters);

    }

    private DataServerExplorer openServerExplorerWithoutValidate(

        String explorerName, DataServerExplorerParameters parameters)

        throws InitializeException, ProviderNotRegisteredException,

        ValidateDataParametersException {

        String name = explorerName; // parameters.getExplorerName();

        try {

            DataServerExplorerProvider server =

                (DataServerExplorerProvider) ToolsLocator

                    .getExtensionPointManager()

                    .get(DATA_MANAGER_EXPLORER)

                    .create(

                        name,

                        new Object[] { parameters,

                            new DefaultDataServerExplorerProviderServices() });

            if (server == null) {

                throw new ProviderNotRegisteredException(name);

            }

            return server;

        } catch (InstantiationException e) {

            throw new InitializeException(e);

        } catch (IllegalAccessException e) {

            throw new InitializeException(e);

        } catch (SecurityException e) {

            throw new InitializeException(e);

        } catch (IllegalArgumentException e) {

            throw new InitializeException(e);

        } catch (NoSuchMethodException e) {

            throw new InitializeException(e);

        } catch (InvocationTargetException e) {

            throw new InitializeException(e);

        }

    }

    /**

     * @deprecated see openServerExplorer

     */

    public DataServerExplorer createServerExplorer(

        DataServerExplorerParameters parameters) throws InitializeException,

        ProviderNotRegisteredException, ValidateDataParametersException {

        return openServerExplorer(parameters.getExplorerName(), parameters);

    }

    public List getExplorerProviders() {

        return ToolsLocator.getExtensionPointManager()

            .get(DATA_MANAGER_EXPLORER).getNames();

    }

    /*

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

     * 

     * Expresion evaluation related services

     */

    public Evaluator createExpresion(String expresion)

        throws InitializeException {

        try {

            return (Evaluator) ToolsLocator

                .getExtensionPointManager()

                .get(DATA_MANAGER_EXPRESION_EVALUATOR)

                .create(DATA_MANAGER_EXPRESION_EVALUATOR_DEFAULT,

                    new Object[] { expresion });

        } catch (SecurityException e) {

            throw new InitializeException(e);

        } catch (IllegalArgumentException e) {

            throw new InitializeException(e);

        } catch (NoSuchMethodException e) {

            throw new InitializeException(e);

        } catch (InstantiationException e) {

            throw new InitializeException(e);

        } catch (IllegalAccessException e) {

            throw new InitializeException(e);

        } catch (InvocationTargetException e) {

            throw new InitializeException(e);

        }

    }

    public void registerDefaultEvaluator(Class evaluatorClass) {

        if (!Evaluator.class.isAssignableFrom(evaluatorClass)) {

            throw new ClassCastException();

        }

        ToolsLocator

            .getExtensionPointManager()

            .add(DATA_MANAGER_EXPRESION_EVALUATOR,

                DATA_MANAGER_EXPRESION_EVALUATOR_DESCRIPTION)

            .append(DATA_MANAGER_EXPRESION_EVALUATOR_DEFAULT,

                "Default expresion evaluator for use in DAL", evaluatorClass);

    }

    /*

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

     * 

     * Index related services

     */

    public List getFeatureIndexProviders() {

        return ToolsLocator.getExtensionPointManager().get(DATA_MANAGER_INDEX)

            .getNames();

    }

    public void setDefaultFeatureIndexProviderName(int dataType, String name) {

        defaultDataIndexProviders.put(new Integer(dataType), name);

    }

    public String getDefaultFeatureIndexProviderName(int dataType) {

        return (String) defaultDataIndexProviders.get(new Integer(dataType));

    }

    public FeatureIndexProviderServices createFeatureIndexProvider(String name,

        FeatureStore store, FeatureType type, String indexName,

        FeatureAttributeDescriptor attr) throws InitializeException,

        ProviderNotRegisteredException {

        if (name == null) {

            name = getDefaultFeatureIndexProviderName(attr.getType());

        }

        if (name == null) {

            throw new InitializeException(

                "There not any index provider registered.", null);

        }

        try {

            FeatureIndexProvider provider =

                (FeatureIndexProvider) ToolsLocator.getExtensionPointManager()

                    .get(DATA_MANAGER_INDEX).create(name);

            if (provider == null) {

                throw new ProviderNotRegisteredException(name);

            }

            FeatureIndexProviderServices services =

                new DefaultFeatureIndex((FeatureStoreProviderServices) store,

                    type, provider, attr.getName(), indexName);

            services.initialize();

            return services;

        } catch (InstantiationException e) {

            throw new InitializeException(e);

        } catch (IllegalAccessException e) {

            throw new InitializeException(e);

        } catch (SecurityException e) {

            throw new InitializeException(e);

        } catch (IllegalArgumentException e) {

            throw new InitializeException(e);

        }

    }

    public void registerFeatureIndexProvider(String name, String description,

        Class clazz, int dataType) {

        ToolsLocator.getExtensionPointManager()

            .add(DATA_MANAGER_INDEX, DATA_MANAGER_INDEX_DESCRIPTION)

            .append(name, null, clazz);

        if (getDefaultFeatureIndexProviderName(dataType) == null) {

            setDefaultFeatureIndexProviderName(dataType, name);

        }

    }

    private void initializeIndexes() {

        this.defaultDataIndexProviders = new HashMap();

    }

    public void intializeDataStore(DataStore store,

        DataStoreParameters parameters) throws InitializeException,

        ProviderNotRegisteredException {

        ((DataStoreInitializer) store).intializePhase1(this, parameters);

        DataStoreProvider provider =

            this.createProvider((DataStoreProviderServices) store, parameters);

        ((DataStoreInitializer) store).intializePhase2(provider);

    }

    public DataStoreProvider createProvider(

        DataStoreProviderServices providerServices,

            DataStoreParameters parameters) throws InitializeException,

        ProviderNotRegisteredException {

        String name = parameters.getDataStoreName();

        DataStoreProvider provider = null;

        boolean retry = true;

        while (retry) {

            try {

                DataStoreProviderFactory providerFactory =

                    (DataStoreProviderFactory) ToolsLocator

                        .getExtensionPointManager()

                        .get(DATA_MANAGER_STORE_PROVIDER_FACTORY).create(name);

                if (providerFactory != null) {

                    provider =

                        (DataStoreProvider) providerFactory.createProvider(

                            parameters, providerServices);

                } else {

                    provider =

                        (DataStoreProvider) ToolsLocator

                            .getExtensionPointManager()

                            .get(DATA_MANAGER_STORE)

                            .create(name,

                                new Object[] { parameters, providerServices });

                }

                retry = false;

            } catch (Exception e) {

                if (openErrorHandler != null) {

                    retry = openErrorHandler.canRetryOpen(e, parameters);

                } else {

                    retry = false;

                }

                if (!retry) {

                    throw new InitializeException(

                        parameters.getDataStoreName(), e);

                }

            }

        }

        if (provider == null) {

            throw new ProviderNotRegisteredException(name);

        }

        return provider;

    }

    public void registerFeatureCacheProvider(

        FeatureCacheProviderFactory providerFactory) {

        ToolsLocator.getExtensionPointManager()

            .add(DATA_MANAGER_CACHE, DATA_MANAGER_CACHE_DESCRIPTION)

            .append(providerFactory.getName(), "", providerFactory);

    }

    public FeatureCacheProvider createFeatureCacheProvider(String name,

        DynObject parameters) throws DataException {

        if (name == null) {

            throw new InitializeException(

                "It is necessary to provide a cache name", null);

        }

        if (parameters == null) {

            throw new InitializeException(

                "It is necessary to provide parameters to create the explorer",

                null);

        }

        FeatureCacheProviderFactory featureCacheProviderFactory;

        try {

            featureCacheProviderFactory =

                (FeatureCacheProviderFactory) ToolsLocator

                    .getExtensionPointManager().get(DATA_MANAGER_CACHE)

                    .create(name);

            if (featureCacheProviderFactory == null) {

                throw new ProviderNotRegisteredException(name);

            }

            return featureCacheProviderFactory.createCacheProvider(parameters);

        } catch (InstantiationException e) {

            throw new InitializeException(e);

        } catch (IllegalAccessException e) {

            throw new InitializeException(e);

        }

    }

    public List getFeatureCacheProviders() {

        ExtensionPoint extensionPoint =

            ToolsLocator.getExtensionPointManager().get(DATA_MANAGER_CACHE);

        if (extensionPoint != null) {

            return ToolsLocator.getExtensionPointManager()

                .get(DATA_MANAGER_CACHE).getNames();

        } else {

            return new ArrayList();

        }

    }

    public DynObject createCacheParameters(String name)

        throws InitializeException, ProviderNotRegisteredException {

        if (name == null) {

            throw new InitializeException(

                "It is necessary to provide a cache name", null);

        }

        FeatureCacheProviderFactory featureCacheProviderFactory;

        try {

            featureCacheProviderFactory =

                (FeatureCacheProviderFactory) ToolsLocator

                    .getExtensionPointManager().get(DATA_MANAGER_CACHE)

                    .create(name);

            if (featureCacheProviderFactory == null) {

                throw new ProviderNotRegisteredException(name);

            }

            return featureCacheProviderFactory.createParameters();

        } catch (InstantiationException e) {

            throw new InitializeException(e);

        } catch (IllegalAccessException e) {

            throw new InitializeException(e);

        }

    }

    public DataStoreParameters createMemoryStoreParameters(

        String autoOrderAttributeName) throws InitializeException {

        DataStoreParameters parameters;

        try {

            parameters = createStoreParameters(MemoryStoreProvider.NAME);

            if (autoOrderAttributeName != null) {

                parameters.setDynValue(

                    MemoryStoreParameters.ORDER_PARAMETER_NAME,

                    autoOrderAttributeName);

            }

            return parameters;

        } catch (ProviderNotRegisteredException e) {

            throw new InitializeException("MemoryStoreProvider", e);

        }

    }

    public FeatureStore createMemoryStore(String autoOrderAttributeName)

        throws InitializeException {

        DataStoreParameters parameters =

            createMemoryStoreParameters(autoOrderAttributeName);

        try {

            return (FeatureStore) createStore(parameters);

        } catch (ValidateDataParametersException e) {

            throw new InitializeException("MemoryStoreProvider", e);

        } catch (ProviderNotRegisteredException e) {

            throw new InitializeException("MemoryStoreProvider", e);

        }

    }

    public FeaturePagingHelper createFeaturePagingHelper(

        FeatureStore featureStore, int pageSize) throws BaseException {

        return new FeaturePagingHelperImpl(featureStore, pageSize);

    }

    public FeaturePagingHelper createFeaturePagingHelper(

        FeatureStore featureStore, FeatureQuery featureQuery, int pageSize)

        throws BaseException {

        return new FeaturePagingHelperImpl(featureStore, featureQuery, pageSize);

    }

    public void setOpenErrorHandler(OpenErrorHandler handler) {

        openErrorHandler = handler;

    }

    public OpenErrorHandler getOpenErrorHandler() {

        return this.openErrorHandler;

    }

    public EditableFeatureType createFeatureType() {

        return new DefaultEditableFeatureType();

    }

    public List getDataTypes() {

        if (dataTypes == null) {

            DataTypesManager manager = ToolsLocator.getDataTypesManager();

            dataTypes = new ArrayList();

            dataTypes.add(manager.get(DataTypes.STRING));

            dataTypes.add(manager.get(DataTypes.BOOLEAN));

            dataTypes.add(manager.get(DataTypes.INT));

            dataTypes.add(manager.get(DataTypes.DOUBLE));

            dataTypes.add(manager.get(DataTypes.DATE));

            dataTypes.add(manager.get(DataTypes.GEOMETRY));

        }

        return dataTypes;

    }

    public void registerFeatureAttributeGetter(String name, Class clazz) {

        if (name == null || clazz == null) {           

            throw new IllegalArgumentException("Any parameters can be null");

        }

        if(!(FeatureAttributeGetter.class.isAssignableFrom(clazz))) {            

            throw new IllegalArgumentException(

                "Not supported implemtation: name=" + name

                + " class=" + clazz.getName());

        }

    }

    public FeatureAttributeGetter createFeatureAttributeGetter(String name) throws InitializeException {

        if (name == null) {           

            throw new IllegalArgumentException("The parameter can not be null");

        }

        try{

            return (FeatureAttributeGetter) ToolsLocator.getExtensionPointManager().get(DATA_MANAGER_FEATURE_ATTTRIBUTE_GETTER).create(name);

        } catch (InstantiationException e) {

            throw new InitializeException("FeatureAttributeGetter", e);

        } catch (IllegalAccessException e) {

            throw new InitializeException("FeatureAttributeGetter", e);

        }

    }

    public DataServerExplorerPool getDataServerExplorerPool() {

        if( this.dataServerExplorerPool==null )  {

            this.dataServerExplorerPool = new DefaultDataServerExplorerPool();

        }

        return this.dataServerExplorerPool;

    }

    public void setDataServerExplorerPool(DataServerExplorerPool pool) {

        this.dataServerExplorerPool = pool;

    }

    private static final String DAL_OpenStore = "dal.openstore.";

    @Override

    public DataStoreParameters createStoreParameters(DynStruct struct) throws InitializeException, ProviderNotRegisteredException {

        if( !(struct instanceof DynStruct_v2 ) ) {

            throw new IllegalArgumentException("A DynStruct_v2 is required.");

        }

        Tags tags = ((DynStruct_v2)struct).getTags();

        return this.createStoreParameters(tags);

    }

    public DataStoreParameters createStoreParameters(Tags tags) throws InitializeException, ProviderNotRegisteredException {

        String providerName = (String) tags.get(DAL_OpenStore+"provider");

        if( providerName == null ) {

            throw new IllegalArgumentException("Tag DAL.OpenStore.provider is missing in struct.");

        }

        int prefixlen = DAL_OpenStore.length();

        DataStoreParameters parameters = this.createStoreParameters(providerName);

        for( String key : tags ) {

            if( key.startsWith(DAL_OpenStore) ) {

                parameters.setDynValue(key.substring(prefixlen), tags.get(key));

            }

        }

        return parameters;

    }

    @Override

    public DataStore openStore(DynStruct struct) throws InitializeException, ProviderNotRegisteredException, ValidateDataParametersException {

        DataStoreParameters paramters = this.createStoreParameters(struct);

        DataStore store = this.openStore(paramters.getDataStoreName(), paramters);

        return store;

    }

}