This may not be exactly what you're looking for, but maybe it'll get you started. There's ways to do joins, or using a Query in the Tweet.find.where() below, instead of using the List of keywords from a Person, that may be easier. There some joins in the git hub examples, but they're a bit old
package models.test;
import play.db.ebean.Model;
import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;
/**
* Created by aakture on 3/7/14.
*/
@Entity
public class Person extends Model {
@Id
long id;
@OneToMany(cascade = CascadeType.ALL)
List<Keyword> keywords = new ArrayList();
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public List<Keyword> getKeywords() {
return keywords;
}
public void setKeywords(List<Keyword> keywords) {
this.keywords = keywords;
}
public static Finder<Integer, Person> find = new Finder<Integer, Person>(
Integer.class, Person.class);
}
package models.test;
import play.db.ebean.Model;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Keyword extends Model {
@Id
Integer id;
String text;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public static Finder<Integer, Keyword> find = new Finder<Integer, Keyword>(
Integer.class, Keyword.class);
}
package models.test;
import play.db.ebean.Model;
import javax.persistence.*;
import java.sql.Date;
@Entity
public class Tweet extends Model {
@Id
Integer id;
Date datetime;
@OneToOne
Keyword keyword;
public void setId(Integer id) {
this.id = id;
}
public Keyword getKeyword() {
return keyword;
}
public void setKeyword(Keyword keyword) {
this.keyword = keyword;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Date getDatetime() {
return datetime;
}
public void setDatetime(Date datetime) {
this.datetime = datetime;
}
public static Finder<Integer, Tweet> find = new Finder<Integer, Tweet>(
Integer.class, Tweet.class);
}
@Test
public void testTweets() {
List<Keyword> keywordList = new ArrayList<Keyword>();
Keyword keyword = new Keyword();
keyword.setText("hello");
keywordList.add(keyword);
keyword = new Keyword();
keyword.setText("world");
keywordList.add(keyword);
Person person = new Person();
person.setKeywords(keywordList);
person.save();
keyword = Keyword.find.where().eq("text", "hello").findUnique();
log.info("keywords " + keyword);
java.sql.Date now = new java.sql.Date(new Date().getTime());
for(int i = 0; i < 10; i++) {
Tweet tweet = new Tweet();
tweet.setKeyword(keyword);
tweet.setDatetime(now);
tweet.save();
}
log.info("now is " + now.getTime());
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_YEAR, -7);
java.sql.Date oneHourAgo = new java.sql.Date(cal.getTimeInMillis());
log.info("oneHourAgo is " + oneHourAgo.getTime());
List<Keyword> personsKeywords = person.getKeywords();
List<String> keyWordsStringList = new ArrayList<String>();
for(Keyword kw : keywordList) {
keyWordsStringList.add(kw.getText());
}
List<Tweet> tweets = Tweet.find.where().and(Expr.in("keyword.text", keyWordsStringList), Expr.gt("datetime", oneHourAgo)).findList();
log.info("tweets has " + tweets.size());
}