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* to you under the Apache License, Version 2.0 (the
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package org.apache.cayenne.tutorial.persistent.client;
import java.util.List;
import org.apache.cayenne.CayenneContext;
import org.apache.cayenne.DataChannel;
import org.apache.cayenne.DataObjectUtils;
import org.apache.cayenne.ObjectContext;
import org.apache.cayenne.exp.Expression;
import org.apache.cayenne.exp.ExpressionFactory;
import org.apache.cayenne.query.SelectQuery;
import org.apache.cayenne.remote.ClientChannel;
import org.apache.cayenne.remote.ClientConnection;
import org.apache.cayenne.remote.hessian.HessianConnection;
public class Main {
public static void main(String[] args) {
ClientConnection connection = new HessianConnection(
"http://localhost:8080/tutorial/cayenne-service",
"cayenne-user", "secret", null);
DataChannel channel = new ClientChannel(connection);
ObjectContext context = new CayenneContext(channel);
newObjectsTutorial(context);
selectTutorial(context);
deleteTutorial(context);
}
static void newObjectsTutorial(ObjectContext context) {
// creating new Artist
Artist picasso = context.newObject(Artist.class);
picasso.setName("Pablo Picasso");
// Creating other objects
Gallery metropolitan = context.newObject(Gallery.class);
metropolitan.setName("Metropolitan Museum of Art");
Painting girl = context.newObject(Painting.class);
girl.setName("Girl Reading at a Table");
Painting stein = context.newObject(Painting.class);
stein.setName("Gertrude Stein");
// connecting objects together via relationships
picasso.addToPaintings(girl);
picasso.addToPaintings(stein);
girl.setGallery(metropolitan);
stein.setGallery(metropolitan);
// saving all the changes above
context.commitChanges();
}
static void selectTutorial(ObjectContext context) {
// SelectQuery examples
SelectQuery select1 = new SelectQuery(Painting.class);
List<Painting> paintings1 = context.performQuery(select1);
Expression qualifier2 = ExpressionFactory.likeIgnoreCaseExp(
Painting.NAME_PROPERTY, "gi%");
SelectQuery select2 = new SelectQuery(Painting.class, qualifier2);
List<Painting> paintings2 = context.performQuery(select2);
}
static void deleteTutorial(ObjectContext context) {
// Delete object examples
Expression qualifier = ExpressionFactory.matchExp(Artist.NAME_PROPERTY,
"Pablo Picasso");
SelectQuery selectToDelete = new SelectQuery(Artist.class, qualifier);
Artist picasso = (Artist) DataObjectUtils.objectForQuery(context,
selectToDelete);
if (picasso != null) {
context.deleteObject(picasso);
context.commitChanges();
}
}
}