Java/Hibernate/Criteria Data Type
Criteria: Condition Double Value Compare
<source lang="java">
///////////////////////////////////////////////////////////////////////// import java.util.*; import java.sql.*; import org.hibernate.*; import org.hibernate.criterion.*; public class Main {
public static void main(String[] args) { HibernateUtil.setup("create table Supplier ( id int, name VARCHAR);"); HibernateUtil.setup("create table Product ( id int, name VARCHAR, description VARCHAR, price double,supplierId int);"); prepareData(); Session session = HibernateUtil.currentSession(); Criteria crit = session.createCriteria(Product.class); crit.add(Restrictions.gt("price",new Double(25.0))); List results = crit.list(); displayProductsList(results); HibernateUtil.checkData("select * from Supplier"); HibernateUtil.checkData("select * from Product"); } public static void displayProductsList(List list){ Iterator iter = list.iterator(); if (!iter.hasNext()){ System.out.println("No products to display."); return; } while (iter.hasNext()){ Product product = (Product) iter.next(); String msg = product.getSupplier().getName() + "\t"; msg += product.getName() + "\t"; msg += product.getPrice() + "\t"; msg += product.getDescription(); System.out.println(msg); } } private static void prepareData(){ Session session = HibernateUtil.currentSession(); Supplier supplier1 = new Supplier(); supplier1.setName("Supplier Name 1"); session.save(supplier1); Supplier supplier2 = new Supplier(); supplier2.setName("Supplier Name 2"); session.save(supplier2); Product product1 = new Product("Product 1","Name for Product 1", 2.0); product1.setSupplier(supplier1); supplier1.getProducts().add(product1); session.save(product1); Product product12 = new Product("Product 2","Name for Product 2", 22.0); product12.setSupplier(supplier1); supplier1.getProducts().add(product12); session.save(product12); Product product2 = new Product("Product 3", "Name for Product 3", 30.0); product2.setSupplier(supplier2); supplier2.getProducts().add(product2); session.save(product2); session.flush(); HibernateUtil.closeSession(); }
}
///////////////////////////////////////////////////////////////////////// public class Product {
private int id; private Supplier supplier; private String name; private String description; private double price; public Product() { super(); } public Product(String name, String description, double price) { super(); this.name = name; this.description = description; this.price = price; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Supplier getSupplier() { return supplier; } public void setSupplier(Supplier supplier) { this.supplier = supplier; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; }
}
///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Supplier"> <id name="id" type="int"> <generator class="increment"/> </id> <property name="name" type="string"/> <bag name="products" inverse="true" cascade="all,delete-orphan"> <key column="supplierId"/> <one-to-many class="Product"/> </bag>
</class>
</hibernate-mapping>
///////////////////////////////////////////////////////////////////////// import java.util.ArrayList; import java.util.List; public class Supplier {
private int id; private String name; private List products = new ArrayList(); public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public List getProducts() { return products; } public void setProducts(List products) { this.products = products; }
}
///////////////////////////////////////////////////////////////////////// <?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="Product.hbm.xml"/> <mapping resource="Supplier.hbm.xml"/> </session-factory>
</hibernate-configuration>
</source>
Query Criteria Greater To Equal for Date data type
<source lang="java">
///////////////////////////////////////////////////////////////////////// import java.util.*; import org.hibernate.*; import org.hibernate.criterion.*; public class SimpleRetrieveTest {
public static void main(String[] args) { HibernateUtil.setup("create table EVENTS ( uid int, name VARCHAR, start_Date date, duration int, location_id int);"); HibernateUtil.setup("create table locations ( uid int, name VARCHAR, address VARCHAR);"); // hibernate code start Session session = HibernateUtil.currentSession(); Transaction tx = session.beginTransaction();
Location location = new Location(); location.setName("USA"); location.setAddress("Address"); session.save(location);
Event e= new Event(); e.setId(11111L); e.setName("testSave"); e.setStartDate(new Date()); e.setLocation(location); session.save(e); Criteria crit = session.createCriteria(Event.class); crit.add( Expression.ge("startDate",new Date()) ); crit.setMaxResults(1); List results = crit.list(); System.out.println(results.size()); tx.rumit(); HibernateUtil.closeSession(); HibernateUtil.sessionFactory.close(); // hibernate code end }
}
///////////////////////////////////////////////////////////////////////// <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping >
<class name="Location" table="locations" lazy="true"> <id name="id" column="uid" type="long"> <generator class="native"/> </id> <property name="name" type="string"/> <property name="address" type="string"/> </class>
</hibernate-mapping>
/////////////////////////////////////////////////////////////////////////
public class Location {
private Long id; private String name; private String address; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; }
}
/////////////////////////////////////////////////////////////////////////
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="Event" table="events"> <id name="id" column="uid" type="long" unsaved-value="null"> <generator class="assigned"/> </id> <property name="name" type="string" length="100"/> <property name="startDate" column="start_date" type="date"/> <property name="duration" type="integer"/> <many-to-one name="location" column="location_id" class="Location"/> </class>
</hibernate-mapping>
/////////////////////////////////////////////////////////////////////////
import java.util.Date; public class Event {
private Long id; private String name; private Date startDate; private int duration; private Location location; public void setId(Long id) { this.id = id; } public Long getId() { return id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Date getStartDate() { return startDate; } public void setStartDate(Date startDate) { this.startDate = startDate; } public int getDuration() { return duration; } public void setDuration(int duration) { this.duration = duration; } public Location getLocation() { return location; } public void setLocation(Location location) { this.location = location; }
}
///////////////////////////////////////////////////////////////////////// <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//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="Event.hbm.xml"/> <mapping resource="Location.hbm.xml"/> <mapping resource="Speaker.hbm.xml"/> </session-factory>
</hibernate-configuration>
</source>