127 lines
3.2 KiB
Java
127 lines
3.2 KiB
Java
package de.gurkengewuerz.monitoring.object;
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import java.sql.*;
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/**
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* Created by gurkengewuerz.de on 08.04.2017.
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*/
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public class Database {
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private String sUrl = null;
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private int iTimeout = 30;
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private Connection conn = null;
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private Statement statement = null;
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public Database(String sUrlToLoad) throws Exception {
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setUrl(sUrlToLoad);
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setConnection();
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setStatement();
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}
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public static String escapeString(String x, boolean escapeDoubleQuotes) {
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StringBuilder sBuilder = new StringBuilder(x.length() * 11 / 10);
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int stringLength = x.length();
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for (int i = 0; i < stringLength; ++i) {
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char c = x.charAt(i);
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switch (c) {
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case 0: /* Must be escaped for 'mysql' */
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sBuilder.append('\\');
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sBuilder.append('0');
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break;
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case '\n': /* Must be escaped for logs */
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sBuilder.append('\\');
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sBuilder.append('n');
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break;
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case '\r':
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sBuilder.append('\\');
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sBuilder.append('r');
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break;
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case '\\':
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sBuilder.append('\\');
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sBuilder.append('\\');
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break;
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case '\'':
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sBuilder.append('\\');
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sBuilder.append('\'');
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break;
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case '"': /* Better safe than sorry */
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if (escapeDoubleQuotes) {
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sBuilder.append('\\');
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}
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sBuilder.append('"');
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break;
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case '\032': /* This gives problems on Win32 */
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sBuilder.append('\\');
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sBuilder.append('Z');
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break;
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case '\u00a5':
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case '\u20a9':
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// escape characters interpreted as backslash by mysql
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// fall through
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default:
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sBuilder.append(c);
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}
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}
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return sBuilder.toString();
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}
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private void setUrl(String sUrlVar) {
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sUrl = sUrlVar;
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}
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private void setConnection() throws Exception {
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conn = DriverManager.getConnection("jdbc:sqlite:" + sUrl);
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}
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public Connection getConnection() {
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return conn;
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}
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private void setStatement() throws Exception {
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if (conn == null) {
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setConnection();
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}
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statement = conn.createStatement();
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statement.setQueryTimeout(iTimeout); // set timeout to 30 sec.
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}
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public PreparedStatement getPreparedStatement(String sql) throws SQLException {
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return conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
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}
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public void executeUpdate(String instruction) throws SQLException {
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statement.executeUpdate(instruction);
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}
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public ResultSet executeQuery(String instruction) throws SQLException {
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return statement.executeQuery(instruction);
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}
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public void closeConnection() {
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try {
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conn.close();
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} catch (Exception ignore) {
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}
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}
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} |