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/**
 * 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.ctakes.ytex.tools;

import org.apache.ctakes.ytex.uima.ApplicationContextHolder;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.sql.*;
import java.util.Properties;
import java.util.zip.GZIPInputStream;

/**
 * read specified document id's cas, send to stdout
 * @author vijay
 *
 */
public class ExportCAS {

	/**
	 * @param args
	 * @throws Exception 
	 */
	public static void main(String[] args) throws Exception {
		String documentID = args[0];
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		BufferedReader gzIS = null;
		Properties jdbcProperties = ApplicationContextHolder.getYtexProperties();

		try {
			Class.forName(jdbcProperties.getProperty("db.driver"));
			conn = DriverManager.getConnection(jdbcProperties
					.getProperty("db.url"), jdbcProperties
					.containsKey("db.username") ? jdbcProperties
					.getProperty("db.username") : null, jdbcProperties
					.containsKey("db.password") ? jdbcProperties
					.getProperty("db.password") : null);
			String strSQL = jdbcProperties.containsKey("db.schema") ? "select cas from "
					+ jdbcProperties.getProperty("db.schema")
					+ ".document where document_id = ?"
					: "select cas from document where document_id = ?";
			ps = conn.prepareStatement(strSQL);
			ps.setInt(1, Integer.parseInt(documentID));
			rs = ps.executeQuery();
			if (rs.next()) {
				gzIS = new BufferedReader(new InputStreamReader(new GZIPInputStream(new BufferedInputStream(rs
						.getBinaryStream(1)))));
				String line;
				while((line = gzIS.readLine()) != null) {
					System.out.println(line);
				}
			} else {
				throw new RuntimeException("No document with id = "
						+ documentID);
			}
		} finally {
			try {
				if (rs != null)
					rs.close();
			} catch (SQLException e) {
			}
			try {
				if (ps != null)
					ps.close();
			} catch (SQLException e) {
			}
			try {
				if (conn != null)
					conn.close();
			} catch (SQLException e) {
			}
			try {
				if (gzIS != null)
					gzIS.close();
			} catch (IOException e) {
			}
		}
	}

}