Java/Hibernate/Map Map

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Collection Mapping: Map Key and Value are Both Objects

   <source lang="java">

///////////////////////////////////////////////////////////////////////// import java.util.*; public class Console { 

 private int id;
 private String name;
 private Map games;
 public Console() {
 }
 public Console(String name) {
   this.name = name;
 }
 public void setId(int i) {
   id = i;
 }
 public int getId() {
   return id;
 }
 public void setName(String n) {
   name = n;
 }
 public String getName() {
   return name;
 }
 public void setGames(Map m) {
   games = m;
 }
 public Map getGames() {
   return games;
 }

}

///////////////////////////////////////////////////////////////////////// public class Game { 

 private int id;
 private String name;
 
 public Game() {
 }
 public Game(String name) {
   this.name = name;
 }
 public void setId(int i) {
   id = i;
 }
 public int getId() {
   return id;
 }
 public void setName(String s) {
   name = s;
 }
 public String getName() {
   return name;
 }
   public boolean equals(Object obj) {
       if (obj == null) return false;
       if (!this.getClass().equals(obj.getClass())) return false;
       
       Game obj2 = (Game)obj;
       if ((this.id == obj2.getId()) &&
           this.name.equals(obj2.getName())) {
           return true;
       }
       
   return false;
   }
   public int hashCode() {      
       int tmp = 0;
       tmp = (id + name).hashCode();
       return tmp;
   }

} ///////////////////////////////////////////////////////////////////////// import java.util.*; public class GameComparator implements Comparator { 

 public int compare(Object o1, Object o2) { 
       Game game1 = (Game)o1; 
       Game game2 = (Game)o2; 
      return game1.getName().rupareTo(game2.getName()); 
   } 
   public boolean equals(Object obj) {
       if (obj == null) return false;
       if (!this.getClass().equals(obj.getClass())) return false;
       
              
   return true;
   }

} ///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-configuration PUBLIC 

   "-//Hibernate/Hibernate Configuration DTD//EN"
   "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration> 

   <session-factory>
       
       <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
       <property name="connection.url">jdbc:hsqldb:data/tutorial</property>
       <property name="connection.username">sa</property>
       <property name="connection.password"></property>
       
       <property name="connection.pool_size">1</property>
       
       <property name="dialect">org.hibernate.dialect.HSQLDialect</property>
       
       <property name="show_sql">true</property>
       
       <mapping resource="Console.hbm.xml"/>
   </session-factory>

</hibernate-configuration>

///////////////////////////////////////////////////////////////////////// import java.sql.Connection; import java.sql.DriverManager; import java.sql.Statement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class HibernateUtil { 

   public static final SessionFactory sessionFactory;
   static {
       try {
           // Create the SessionFactory from hibernate.cfg.xml
           sessionFactory = new Configuration().configure().buildSessionFactory();
       } catch (Throwable ex) {
           // Make sure you log the exception, as it might be swallowed
           System.err.println("Initial SessionFactory creation failed." + ex);
           throw new ExceptionInInitializerError(ex);
       }
   }
   public static final ThreadLocal session = new ThreadLocal();
   public static Session currentSession() throws HibernateException {
       Session s = (Session) session.get();
       // Open a new Session, if this thread has none yet
       if (s == null) {
           s = sessionFactory.openSession();
           // Store it in the ThreadLocal variable
           session.set(s);
       }
       return s;
   }
   public static void closeSession() throws HibernateException {
       Session s = (Session) session.get();
       if (s != null)
           s.close();
       session.set(null);
   }
   
   static Connection conn; 
   static Statement st;
 public static void setup(String sql) {
   try {
     // Step 1: Load the JDBC driver.
     Class.forName("org.hsqldb.jdbcDriver");
     System.out.println("Driver Loaded.");
     // Step 2: Establish the connection to the database.
     String url = "jdbc:hsqldb:data/tutorial";
     conn = DriverManager.getConnection(url, "sa", "");
     System.out.println("Got Connection.");
     st = conn.createStatement();
     st.executeUpdate(sql);
   } catch (Exception e) {
     System.err.println("Got an exception! ");
     e.printStackTrace();
     System.exit(0);
   }
 }
 public static void checkData(String sql) {
   try {
     HibernateUtil.outputResultSet(st
         .executeQuery(sql));

// conn.close(); 

   } catch (Exception e) {
     e.printStackTrace();
   }
 }
   public static void outputResultSet(ResultSet rs) throws Exception{
   ResultSetMetaData metadata = rs.getMetaData();
   int numcols = metadata.getColumnCount();
   String[] labels = new String[numcols]; 
   int[] colwidths = new int[numcols];
   int[] colpos = new int[numcols];
   int linewidth;
     for (int i = 0; i < numcols; i++) {
       labels[i] = metadata.getColumnLabel(i + 1); // get its label
       System.out.print(labels[i]+"  ");
   }
     System.out.println("------------------------");
   while (rs.next()) {
       for (int i = 0; i < numcols; i++) {
       Object value = rs.getObject(i + 1);
       if(value == null){
           System.out.print("       ");
       }else{
           System.out.print(value.toString().trim()+"   ");
       }
       
     }
       System.out.println("       ");
   }
   }

}

///////////////////////////////////////////////////////////////////////// public class Instructions { 

 private int id;
 private String info;
 public Instructions() {
 }
 public Instructions(String info) {
   this.info = info;
 }
 public void setId(int i) {
   id = i;
 }
 public int getId() {
   return id;
 }
 public void setInfo(String s) {
   info = s;
 }
 public String getInfo() {
   return info;
 }

} ///////////////////////////////////////////////////////////////////////// log4j.rootCategory=WARN, console log4j.appender.console=org.apache.log4j.ConsoleAppender log4j.appender.console.layout=org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n log4j.appender.stdout.Target=System.out

///////////////////////////////////////////////////////////////////////// import java.io.Serializable; import java.util.*; import org.hibernate.*; import org.hibernate.cfg.*; import org.hibernate.criterion.*; import org.hibernate.event.*; import org.hibernate.event.def.*; public class Main { 

  public static void main(String[] args) throws Exception {
     HibernateUtil.setup("create table console (id int, name varchar);");    
     HibernateUtil.setup("create table game (id int, name varchar);");    
     HibernateUtil.setup("create table instructions (id int, info varchar );");    
     HibernateUtil.setup("create table game_instructions (parent_id int,game_id int,instructions_id int);");    
     Session session = HibernateUtil.currentSession();

     Console sp = new Console("Console");
    
     TreeMap p = new TreeMap(new GameComparator());
     Game g = new Game("Game 1");
     Game g2 = new Game("Game 2");
     p.put(g, new Instructions("Instructions for Game 1"));
     p.put(g2, new Instructions("Instructions for Game 2"));
     sp.setGames(p);
     session.save(g);
     session.save(g2);
     session.flush();
     session.save(sp);
     session.flush();

     session.flush();
     session.close();
     HibernateUtil.checkData("select * from console");
     HibernateUtil.checkData("select * from game");
     HibernateUtil.checkData("select * from instructions");
     HibernateUtil.checkData("select * from game_instructions");      
  }

}

///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping 

   PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" 
   "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping> 

   <class name="Console" table="console">
       <id name="id" unsaved-value="0">
           <generator class="increment"/>
       </id>
       <map name="games" table="game_instructions" sort="GameComparator" cascade="all">
           <key column="parent_id"/>
           <index-many-to-many column="game_id" class="Game"/>
           <many-to-many column="instructions_id" class="Instructions"/>
       </map>
       <property name="name" type="string"/>
   </class>
   <class name="Game" table="game">
       <id name="id" unsaved-value="0">
           <generator class="increment"/>
       </id>
       <property name="name" type="string"/>
   </class>
   <class name="Instructions" table="instructions">
       <id name="id" unsaved-value="0">
           <generator class="increment"/>
       </id>
       <property name="info" type="string"/>
   </class>

</hibernate-mapping> 


      </source>



Collection Mapping: TreeMap

   <source lang="java">

///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping 

   PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" 
   "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping> 

   <class name="Console" table="console">
       <id name="id" unsaved-value="0">
           <generator class="increment"/>
       </id>
       <map name="games" table="game_instructions" sort="GameComparator" cascade="all">
           <key column="parent_id"/>
           <index-many-to-many column="game_id" class="Game"/>
           <many-to-many column="instructions_id" class="Instructions"/>
       </map>
       <property name="name" type="string"/>
   </class>
   <class name="Game" table="game">
       <id name="id" unsaved-value="0">
           <generator class="increment"/>
       </id>
       <property name="name" type="string"/>
   </class>
   <class name="Instructions" table="instructions">
       <id name="id" unsaved-value="0">
           <generator class="increment"/>
       </id>
       <property name="info" type="string"/>
   </class>

</hibernate-mapping>

///////////////////////////////////////////////////////////////////////// import java.util.*; public class Console { 

 private int id;
 private String name;
 private Map games;
 public Console() {
 }
 public Console(String name) {
   this.name = name;
 }
 public void setId(int i) {
   id = i;
 }
 public int getId() {
   return id;
 }
 public void setName(String n) {
   name = n;
 }
 public String getName() {
   return name;
 }
 public void setGames(Map m) {
   games = m;
 }
 public Map getGames() {
   return games;
 }

} ///////////////////////////////////////////////////////////////////////// public class Game { 

 private int id;
 private String name;
 
 public Game() {
 }
 public Game(String name) {
   this.name = name;
 }
 public void setId(int i) {
   id = i;
 }
 public int getId() {
   return id;
 }
 public void setName(String s) {
   name = s;
 }
 public String getName() {
   return name;
 }
   public boolean equals(Object obj) {
       if (obj == null) return false;
       if (!this.getClass().equals(obj.getClass())) return false;
       
       Game obj2 = (Game)obj;
       if ((this.id == obj2.getId()) &&
           this.name.equals(obj2.getName())) {
           return true;
       }
       
   return false;
   }
   public int hashCode() {      
       int tmp = 0;
       tmp = (id + name).hashCode();
       return tmp;
   }

}

///////////////////////////////////////////////////////////////////////// import java.util.*; public class GameComparator implements Comparator { 

 public int compare(Object o1, Object o2) { 
       Game game1 = (Game)o1; 
       Game game2 = (Game)o2; 
      return game1.getName().rupareTo(game2.getName()); 
   } 
   public boolean equals(Object obj) {
       if (obj == null) return false;
       if (!this.getClass().equals(obj.getClass())) return false;
       
              
   return true;
   }

}

///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-configuration PUBLIC 

   "-//Hibernate/Hibernate Configuration DTD//EN"
   "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration> 

   <session-factory>
       
       <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
       <property name="connection.url">jdbc:hsqldb:data/tutorial</property>
       <property name="connection.username">sa</property>
       <property name="connection.password"></property>
       
       <property name="connection.pool_size">1</property>
       
       <property name="dialect">org.hibernate.dialect.HSQLDialect</property>
       
       <property name="show_sql">true</property>
       
       <mapping resource="Console.hbm.xml"/>
   </session-factory>

</hibernate-configuration>

///////////////////////////////////////////////////////////////////////// import java.sql.Connection; import java.sql.DriverManager; import java.sql.Statement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class HibernateUtil { 

   public static final SessionFactory sessionFactory;
   static {
       try {
           // Create the SessionFactory from hibernate.cfg.xml
           sessionFactory = new Configuration().configure().buildSessionFactory();
       } catch (Throwable ex) {
           // Make sure you log the exception, as it might be swallowed
           System.err.println("Initial SessionFactory creation failed." + ex);
           throw new ExceptionInInitializerError(ex);
       }
   }
   public static final ThreadLocal session = new ThreadLocal();
   public static Session currentSession() throws HibernateException {
       Session s = (Session) session.get();
       // Open a new Session, if this thread has none yet
       if (s == null) {
           s = sessionFactory.openSession();
           // Store it in the ThreadLocal variable
           session.set(s);
       }
       return s;
   }
   public static void closeSession() throws HibernateException {
       Session s = (Session) session.get();
       if (s != null)
           s.close();
       session.set(null);
   }
   
   static Connection conn; 
   static Statement st;
 public static void setup(String sql) {
   try {
     // Step 1: Load the JDBC driver.
     Class.forName("org.hsqldb.jdbcDriver");
     System.out.println("Driver Loaded.");
     // Step 2: Establish the connection to the database.
     String url = "jdbc:hsqldb:data/tutorial";
     conn = DriverManager.getConnection(url, "sa", "");
     System.out.println("Got Connection.");
     st = conn.createStatement();
     st.executeUpdate(sql);
   } catch (Exception e) {
     System.err.println("Got an exception! ");
     e.printStackTrace();
     System.exit(0);
   }
 }
 public static void checkData(String sql) {
   try {
     HibernateUtil.outputResultSet(st
         .executeQuery(sql));

// conn.close(); 

   } catch (Exception e) {
     e.printStackTrace();
   }
 }
   public static void outputResultSet(ResultSet rs) throws Exception{
   ResultSetMetaData metadata = rs.getMetaData();
   int numcols = metadata.getColumnCount();
   String[] labels = new String[numcols]; 
   int[] colwidths = new int[numcols];
   int[] colpos = new int[numcols];
   int linewidth;
     for (int i = 0; i < numcols; i++) {
       labels[i] = metadata.getColumnLabel(i + 1); // get its label
       System.out.print(labels[i]+"  ");
   }
     System.out.println("------------------------");
   while (rs.next()) {
       for (int i = 0; i < numcols; i++) {
       Object value = rs.getObject(i + 1);
       if(value == null){
           System.out.print("       ");
       }else{
           System.out.print(value.toString().trim()+"   ");
       }
       
     }
       System.out.println("       ");
   }
   }

} ///////////////////////////////////////////////////////////////////////// public class Instructions { 

 private int id;
 private String info;
 public Instructions() {
 }
 public Instructions(String info) {
   this.info = info;
 }
 public void setId(int i) {
   id = i;
 }
 public int getId() {
   return id;
 }
 public void setInfo(String s) {
   info = s;
 }
 public String getInfo() {
   return info;
 }

}

///////////////////////////////////////////////////////////////////////// import java.io.Serializable; import java.util.*; import org.hibernate.*; import org.hibernate.cfg.*; import org.hibernate.criterion.*; import org.hibernate.event.*; import org.hibernate.event.def.*; public class Main { 

  public static void main(String[] args) throws Exception {
     HibernateUtil.setup("create table console (id int, name varchar);");    
     HibernateUtil.setup("create table game (id int, name varchar);");    
     HibernateUtil.setup("create table instructions (id int, info varchar );");    
     HibernateUtil.setup("create table game_instructions (parent_id int,game_id int,instructions_id int);");    
     Session session = HibernateUtil.currentSession();

     Console sp = new Console("Console");
    
     TreeMap p = new TreeMap(new GameComparator());
     Game g = new Game("Game 1");
     Game g2 = new Game("Game 2");
     p.put(g, new Instructions("Instructions for Game 1"));
     p.put(g2, new Instructions("Instructions for Game 2"));
     sp.setGames(p);
     session.save(g);
     session.save(g2);
     session.flush();
     session.save(sp);
     session.flush();

     session.flush();
     session.close();
     HibernateUtil.checkData("select * from console");
     HibernateUtil.checkData("select * from game");
     HibernateUtil.checkData("select * from instructions");
     HibernateUtil.checkData("select * from game_instructions");      
  }

} 


      </source>



Hibernate Collection Mapping Map

   <source lang="java">

///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-configuration PUBLIC 

   "-//Hibernate/Hibernate Configuration DTD//EN"
   "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration> 

   <session-factory>
       
       <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
       <property name="connection.url">jdbc:hsqldb:data/tutorial</property>
       <property name="connection.username">sa</property>
       <property name="connection.password"></property>
       
       <property name="connection.pool_size">1</property>
       
       <property name="dialect">org.hibernate.dialect.HSQLDialect</property>
       
       <property name="show_sql">true</property>
       
       <mapping resource="SupportProperty.hbm.xml"/>
   </session-factory>

</hibernate-configuration> ///////////////////////////////////////////////////////////////////////// import java.sql.Connection; import java.sql.DriverManager; import java.sql.Statement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class HibernateUtil { 

   public static final SessionFactory sessionFactory;
   static {
       try {
           // Create the SessionFactory from hibernate.cfg.xml
           sessionFactory = new Configuration().configure().buildSessionFactory();
       } catch (Throwable ex) {
           // Make sure you log the exception, as it might be swallowed
           System.err.println("Initial SessionFactory creation failed." + ex);
           throw new ExceptionInInitializerError(ex);
       }
   }
   public static final ThreadLocal session = new ThreadLocal();
   public static Session currentSession() throws HibernateException {
       Session s = (Session) session.get();
       // Open a new Session, if this thread has none yet
       if (s == null) {
           s = sessionFactory.openSession();
           // Store it in the ThreadLocal variable
           session.set(s);
       }
       return s;
   }
   public static void closeSession() throws HibernateException {
       Session s = (Session) session.get();
       if (s != null)
           s.close();
       session.set(null);
   }
   
   static Connection conn; 
   static Statement st;
 public static void setup(String sql) {
   try {
     // Step 1: Load the JDBC driver.
     Class.forName("org.hsqldb.jdbcDriver");
     System.out.println("Driver Loaded.");
     // Step 2: Establish the connection to the database.
     String url = "jdbc:hsqldb:data/tutorial";
     conn = DriverManager.getConnection(url, "sa", "");
     System.out.println("Got Connection.");
     st = conn.createStatement();
     st.executeUpdate(sql);
   } catch (Exception e) {
     System.err.println("Got an exception! ");
     e.printStackTrace();
     System.exit(0);
   }
 }
 public static void checkData(String sql) {
   try {
     HibernateUtil.outputResultSet(st
         .executeQuery(sql));

// conn.close(); 

   } catch (Exception e) {
     e.printStackTrace();
   }
 }
   public static void outputResultSet(ResultSet rs) throws Exception{
   ResultSetMetaData metadata = rs.getMetaData();
   int numcols = metadata.getColumnCount();
   String[] labels = new String[numcols]; 
   int[] colwidths = new int[numcols];
   int[] colpos = new int[numcols];
   int linewidth;
     for (int i = 0; i < numcols; i++) {
       labels[i] = metadata.getColumnLabel(i + 1); // get its label
       System.out.print(labels[i]+"  ");
   }
     System.out.println("------------------------");
   while (rs.next()) {
       for (int i = 0; i < numcols; i++) {
       Object value = rs.getObject(i + 1);
       if(value == null){
           System.out.print("       ");
       }else{
           System.out.print(value.toString().trim()+"   ");
       }
       
     }
       System.out.println("       ");
   }
   }

} ///////////////////////////////////////////////////////////////////////// log4j.rootCategory=WARN, console log4j.appender.console=org.apache.log4j.ConsoleAppender log4j.appender.console.layout=org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n log4j.appender.stdout.Target=System.out

///////////////////////////////////////////////////////////////////////// import java.io.Serializable; import java.util.*; import org.hibernate.*; import org.hibernate.cfg.*; import org.hibernate.criterion.*; import org.hibernate.event.*; import org.hibernate.event.def.*; public class Main { 

  public static void main(String[] args) throws Exception {
     HibernateUtil.setup("create table supportproperty (id int,name varchar);");    
     HibernateUtil.setup("create table properties (id int,property_name varchar,property_value varchar);");    
     Session session = HibernateUtil.currentSession();
     SupportProperty sp = new SupportProperty();
    
     sp.setName("Joe");
     HashMap p = new HashMap();
     p.put("color", "blue");
     p.put("lnf", "mac");
     sp.setProperties(p);
     session.save(sp);
     session.flush();
     HibernateUtil.closeSession();
     
     
     session = HibernateUtil.currentSession();
     SupportProperty sp2 = (SupportProperty)session.load(SupportProperty.class, new Integer(sp.getId()));
     Map p2 = sp2.getProperties();
     System.out.println(p2.get("color"));
     System.out.println(p2.get("lnf"));
     session.flush();
     session.close();
     HibernateUtil.checkData("select * from supportproperty");
     HibernateUtil.checkData("select * from properties");
  }

}

///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping 

   PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" 
   "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping> 

   <class name="SupportProperty" table="supportproperty">
       <id name="id">
           <generator class="increment"/>
       </id>
       
       <map name="properties">
           <key column="id"/>
           <index column="property_name" type="string"/>
           <element column="property_value" type="string"/>
       </map>
       <property name="name" type="string"/>
   </class>

</hibernate-mapping>

///////////////////////////////////////////////////////////////////////// import java.util.*; public class SupportProperty { 

 private int id;
 private String name;
 private Map properties;
 public SupportProperty() {
 }
 public void setId(int i) {
   id = i;
 }
 public int getId() {
   return id;
 }
 public void setName(String s) {
   name = s;
 }
 public String getName() {
   return name;
 }
 public void setProperties(Map m) {
   properties = m;
 }
 public Map getProperties() {
   return properties;
 }

} 


      </source>
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