src/test/java/org/apache/commons/configuration2/test/HsqlDB.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.configuration2.test;

import java.io.FileReader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Stolen from Turbine
 */
public class HsqlDB {

    private static final Log LOG = LogFactory.getLog(HsqlDB.class);

    private final Connection connection;

    public HsqlDB(final String uri, final String databaseDriver, final String loadFile) throws Exception {
        Class.forName(databaseDriver);

        this.connection = DriverManager.getConnection(uri, "sa", "");

        if (StringUtils.isNotEmpty(loadFile)) {
            loadSqlFile(loadFile);
        }
        this.connection.commit();
    }

    public void close() {
        try {
            connection.close();
        } catch (final Exception e) {
        }
    }

    public Connection getConnection() {
        return connection;
    }

    private String getFileContents(final String fileName) throws Exception {
        try (FileReader fr = new FileReader(fileName)) {

            final char[] fileBuf = new char[1024];
            final StringBuilder sb = new StringBuilder(1000);
            int res = -1;

            while ((res = fr.read(fileBuf, 0, 1024)) > -1) {
                sb.append(fileBuf, 0, res);
            }
            return sb.toString();
        }
    }

    private void loadSqlFile(final String fileName) throws Exception {
        try (Statement statement = connection.createStatement()) {
            String commands = getFileContents(fileName);

            for (int targetPos = commands.indexOf(';'); targetPos > -1; targetPos = commands.indexOf(';')) {
                final String cmd = commands.substring(0, targetPos + 1);
                try {
                    statement.execute(cmd);
                } catch (final SQLException sqle) {
                    LOG.warn("Statement: " + cmd + ": " + sqle.getMessage());
                }

                commands = commands.substring(targetPos + 2);
            }
        }
    }
}