java code for Hibernate Collection Mapping Map

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



org.hsqldb.jdbcDriver
jdbc:hsqldb:data/tutorial
sa



1


org.hibernate.dialect.HSQLDialect


true






/////////////////////////////////////////////////////////////////////////

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");
}
}



/////////////////////////////////////////////////////////////////////////


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













/////////////////////////////////////////////////////////////////////////

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;
}
}