Driver.java

/**
 * Copyright (c) 2002-2011 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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, see <http://www.gnu.org/licenses/>.
 */

package org.neo4j.jdbc;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.sql.DriverManager;
import java.sql.DriverPropertyInfo;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.Properties;
import java.util.logging.Logger;

/**
 * JDBC Driver implementation that is backed by a REST Neo4j Server.
 */
public class Driver implements java.sql.Driver {

    private final static Log log = LogFactory.getLog(Driver.class);
    public static final String CON_PREFIX = "jdbc:neo4j:";

    static {
        try {
            DriverManager.registerDriver(new Driver());
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    DriverQueries queries;

    public Driver() {
        queries = new DriverQueries();
    }

    public Neo4jConnection connect(String url, Properties properties) throws SQLException {
        if (!acceptsURL(url)) return null;
        parseUrlProperties(url, properties);

        return Connections.create(this, url, properties);
    }

    public boolean acceptsURL(String s) throws SQLException {
        return s.startsWith(CON_PREFIX);
    }

    public DriverPropertyInfo[] getPropertyInfo(String s, Properties props) throws SQLException {
        return new DriverPropertyInfo[]
                {
                        infoFor(props, "debug"),
                        infoFor(props, "user"),
                        infoFor(props, "password")
                };
    }

    private DriverPropertyInfo infoFor(Properties properties, String name) {
        return new DriverPropertyInfo(name, properties.getProperty(name));
    }

    public int getMajorVersion() {
        return 1;
    }

    public int getMinorVersion() {
        return 0;
    }

    public boolean jdbcCompliant() {
        return false;
    }

    public DriverQueries getQueries() {
        return queries;
    }

    void parseUrlProperties(String s, Properties properties) {
        if (s.contains("?")) {
            String urlProps = s.substring(s.indexOf('?') + 1);
            String[] props = urlProps.split(",");
            for (String prop : props) {
                int idx = prop.indexOf('=');
                if (idx != -1) {
                    String key = prop.substring(0, idx);
                    String value = prop.substring(idx + 1);
                    properties.put(key, value);
                } else {
                    properties.put(prop, "true");
                }
            }
        }
    }

    private final Databases databases = createDatabases();

    private Databases createDatabases() {
        try {
            return (Databases)Class.forName("org.neo4j.jdbc.embedded.EmbeddedDatabases").newInstance();
        } catch (Throwable e) {
            if (log.isInfoEnabled()) log.info("Embedded Neo4j support not enabled "+e.getMessage());
            return null;
        }
    }

    public QueryExecutor createExecutor(String connectionUrl, Properties properties) throws SQLException {
        if (databases == null)
            throw new SQLFeatureNotSupportedException("Embedded Neo4j not available please add neo4j-kernel, -index and -cypher to the classpath");
        return databases.createExecutor(connectionUrl,properties);
    }

    public Logger getParentLogger() throws SQLFeatureNotSupportedException {
        return null;
    }
}