001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2012 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.jpa.entity;
021    
022    import org.apache.commons.lang.builder.ReflectionToStringBuilder;
023    import org.apache.commons.lang.builder.ToStringStyle;
024    
025    import javax.persistence.*;
026    
027    import java.sql.Connection;
028    import java.sql.ResultSet;
029    import java.sql.SQLException;
030    import java.sql.Statement;
031    
032    @Entity
033    @Table(name = SchemaMigration.TABLE_NAME, uniqueConstraints = {@UniqueConstraint(columnNames = {"version"})})
034    public class SchemaMigration {
035    
036      public static final int VERSION_UNKNOWN = -1;
037    
038      public static final int LAST_VERSION = 263;
039      public static final int VERSION_2_13 = 241;
040    
041      public static final String TABLE_NAME = "schema_migrations";
042    
043      @Id
044      @Column(name = "version", updatable = true)
045      private String version;
046    
047      public String getVersion() {
048        return version;
049      }
050    
051      public void setVersion(String s) {
052        this.version = s;
053      }
054    
055      public void setVersion(int i) {
056        this.version = String.valueOf(i);
057      }
058    
059      public static int getCurrentVersion(Connection connection) {
060        Statement stmt = null;
061        ResultSet rs = null;
062        int version = VERSION_UNKNOWN;
063        try {
064          stmt = connection.createStatement();
065          rs = stmt.executeQuery("SELECT version FROM " + SchemaMigration.TABLE_NAME);
066          while (rs.next()) {
067            int i = Integer.parseInt(rs.getString(1));
068            if (i > version) {
069              version = i;
070            }
071          }
072        } catch (SQLException e) {
073          // ignore
074        } finally {
075          close(rs);
076          close(stmt);
077        }
078    
079        return version;
080      }
081    
082      private static void close(ResultSet rs) {
083        if (rs != null) {
084          try {
085            rs.close();
086          } catch (SQLException e) {
087            // why does close() throw a checked-exception ???
088          }
089        }
090      }
091    
092      private static void close(Statement st) {
093        if (st != null) {
094          try {
095            st.close();
096          } catch (SQLException e) {
097            // why does close() throw a checked-exception ???
098          }
099        }
100      }
101    
102      @Override
103      public String toString() {
104        return new ReflectionToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).toString();
105      }
106    }