Application: gvSIG desktop » gvSIG data provider for PostgreSQL

/* 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):

 * 2009 IVER T.I   {{Task}}

 */

/**

 *

 */

package org.gvsig.fmap.dal.store.postgresql;

import java.sql.Connection;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.ArrayList;

import java.util.List;

import org.gvsig.fmap.dal.DataStoreParameters;

import org.gvsig.fmap.dal.NewDataStoreParameters;

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.RemoveException;

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

import org.gvsig.fmap.dal.store.jdbc.JDBCHelper;

import org.gvsig.fmap.dal.store.jdbc.JDBCServerExplorer;

import org.gvsig.fmap.dal.store.jdbc.JDBCServerExplorerParameters;

import org.gvsig.fmap.dal.store.jdbc.JDBCStoreParameters;

import org.gvsig.fmap.dal.store.jdbc.TransactionalAction;

import org.gvsig.fmap.dal.store.jdbc.exception.JDBCExecuteSQLException;

import org.gvsig.fmap.dal.store.jdbc.exception.JDBCSQLException;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * @author jmvivo

 *

 */

public class PostgreSQLServerExplorer extends JDBCServerExplorer {

    final static private Logger logger = LoggerFactory

            .getLogger(PostgreSQLServerExplorer.class);

    public static final String NAME = "PostgreSQLExplorer";

    public PostgreSQLServerExplorer(

            PostgreSQLServerExplorerParameters parameters,

            DataServerExplorerProviderServices services)

            throws InitializeException {

        super(parameters, services);

    }

    private PostgreSQLServerExplorerParameters getPostgreSQLParameters() {

        return (PostgreSQLServerExplorerParameters) getParameters();

    }

    protected JDBCHelper createHelper() throws InitializeException {

        return new PostgreSQLHelper(this, getPostgreSQLParameters());

    }

    public String getStoreName() {

        return PostgreSQLStoreProvider.NAME;

    }

    public String getProviderName() {

        return NAME;

    }

    protected JDBCStoreParameters createStoreParams()

            throws InitializeException, ProviderNotRegisteredException {

        PostgreSQLStoreParameters orgParams = (PostgreSQLStoreParameters) super

                .createStoreParams();

        orgParams.setUseSSL(getPostgreSQLParameters().getUseSSL());

        return orgParams;

    }

        // ****************************

    public boolean canAdd() {

        return true;

    }

    public DataStoreParameters getOpenParameters() throws DataException {

        PostgreSQLServerExplorerParameters parameters = getPostgreSQLParameters();

        PostgreSQLStoreParameters params = new PostgreSQLStoreParameters();

        params.setHost(parameters.getHost());

        params.setPort(parameters.getPort());

        params.setDBName(parameters.getDBName());

        params.setUser(parameters.getUser());

        params.setPassword(parameters.getPassword());

        params.setCatalog(parameters.getCatalog());

        params.setSchema(parameters.getSchema());

        params.setJDBCDriverClassName(parameters.getJDBCDriverClassName());

        params.setUrl(parameters.getUrl());

        return params;

    }

    protected void checkIsMine(DataStoreParameters dsp) {

        if (!(dsp instanceof PostgreSQLConnectionParameters)) {

            // FIXME Excpetion ???

            throw new IllegalArgumentException(

                    "not instance of PostgreSQLStoreParameters");

        }

        super.checkIsMine(dsp);

        PostgreSQLConnectionParameters pgp = (PostgreSQLConnectionParameters) dsp;

        if (pgp.getUseSSL().booleanValue() != getPostgreSQLParameters()

                .getUseSSL()) {

            throw new IllegalArgumentException("worng explorer: Host");

        }

    }

    public void remove(DataStoreParameters dsp) throws RemoveException {

        final PostgreSQLStoreParameters pgParams = (PostgreSQLStoreParameters) dsp;

        TransactionalAction action = new TransactionalAction() {

            public boolean continueTransactionAllowed() {

                return false;

            }

            public Object action(Connection conn) throws DataException {

                Statement st;

                try {

                    st = conn.createStatement();

                } catch (SQLException e) {

                    throw new JDBCSQLException(e);

                }

                String sqlDrop = "Drop table "

                        + pgParams.tableID();

                StringBuilder strb = new StringBuilder();

                strb.append("Delete from GEOMETRY_COLUMNS where f_table_schema = ");

                if (pgParams.getSchema() == null || pgParams.getSchema().length() == 0) {

                    strb.append("current_schema() ");

                } else {

                    strb.append('\'');

                    strb.append(pgParams.getSchema());

                    strb.append("' ");

                }

                strb.append("and f_table_name = '");

                strb.append(pgParams.getTable());

                strb.append('\'');

                String sqlDeleteFromGeometry_column = strb.toString();

                try {

                    try {

                        JDBCHelper.execute(st, sqlDrop);

                    } catch (SQLException e) {

                        throw new JDBCExecuteSQLException(sqlDrop, e);

                    }

                    try {

                        JDBCHelper.execute(st, sqlDeleteFromGeometry_column);

                    } catch (SQLException e) {

                        throw new JDBCExecuteSQLException(

                                sqlDeleteFromGeometry_column, e);

                    }

                } finally {

                    try {

                        st.close();

                    } catch (SQLException e) {

                    };

                }

                return null;

            }

        };

        try {

            this.helper.doConnectionAction(action);

        } catch (Exception e) {

            throw new RemoveException(this.getProviderName(), e);

        }

    }

    public NewDataStoreParameters getAddParameters() throws DataException {

        PostgreSQLServerExplorerParameters parameters = getPostgreSQLParameters();

        PostgreSQLNewStoreParameters params = new PostgreSQLNewStoreParameters();

        params.setHost(parameters.getHost());

        params.setPort(parameters.getPort());

        params.setDBName(parameters.getDBName());

        params.setUser(parameters.getUser());

        params.setPassword(parameters.getPassword());

        params.setCatalog(parameters.getCatalog());

        params.setSchema(parameters.getSchema());

        params.setJDBCDriverClassName(parameters.getJDBCDriverClassName());

        params.setUrl(parameters.getUrl());

        params.setUseSSL(parameters.getUseSSL());

        params.setDefaultFeatureType(this.getServerExplorerProviderServices()

                .createNewFeatureType());

        return params;

    }

    public boolean hasGeometrySupport() {

        return true;

    }

    protected PostgreSQLHelper getPgHelper() {

        return (PostgreSQLHelper) getHelper();

    }

    @Override

    public List getDataStoreProviderNames() {

        List x = new ArrayList(1);

        x.add(PostgreSQLStoreProvider.NAME);

        return x;

    }

}