/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package org.apache.shindig.social.opensocial.jpa;
import static javax.persistence.CascadeType.ALL;
import static javax.persistence.GenerationType.IDENTITY;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.MapMaker;
import org.apache.shindig.social.opensocial.jpa.api.DbObject;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.MapKey;
import javax.persistence.OneToMany;
import javax.persistence.PostLoad;
import javax.persistence.PrePersist;
import javax.persistence.Table;
import javax.persistence.Transient;
import javax.persistence.Version;
/**
* An application data map is the map of data for a single key within an application.
*/
@Entity
@Table(name="application_datamap")
public class ApplicationDataMapDb implements DbObject {
/**
* The object needs to be seializable (map).
*/
private static final long serialVersionUID = 8017568825925047318L;
public static final String FINDBY_ALL_GROUP = null;
public static final String FINDBY_FRIENDS_GROUP = "select am from ApplicationDataMapDb am where am.personId in (select f.friend.id from PersonDb p, FriendDb f where p.objectId = f.person.objectId and ";
public static final String FINDBY_GROUP_GROUP = null;
public static final String FINDBY_SELF_GROUP = "select am from ApplicationDataMapDb am where ";
/**
* The internal object ID used for references to this object. Should be generated by the
* underlying storage mechanism
*/
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "oid")
protected long objectId;
/**
* An optimistic locking field.
*/
@Version
@Column(name = "version")
protected long version;
/**
* A Application Data Map belongs to a set of maps associated with an application.
* The link from Application to DataMap is not navigable since it may contain 1000's of entries.
*/
@ManyToOne(targetEntity=ApplicationDb.class)
@JoinColumn(name="application_id", referencedColumnName="oid")
protected ApplicationDb application;
/**
* Create map using ApplicationDataMapValueDb such that ApplicationDataMapDb are joined on oid ->
* application_datamap_id and then the name value becomes the key, and the value becomes the value
* unfortunately JPA wont do Map<String,String> so this is handled in the prePersist and postLoad
* hook.
*/
@OneToMany(targetEntity=ApplicationDataMapValueDb.class, mappedBy="applicationDataMap", cascade = ALL)
@MapKey(name="name")
protected Map<String, ApplicationDataMapValueDb> valuesDb = new MapMaker().makeMap();
/**
* The transient store for values loaded by the postLoad hook and persisted by the
* prePersist hook.
*/
@Transient
protected Map<String, String> values;
@Basic
@Column(name="person_id", length=255)
protected String personId;
/**
* persist the state of object before sending to the db.
*/
@PrePersist
public void prePersist() {
// add new entries
for (Entry<String, String> e : values.entrySet()) {
ApplicationDataMapValueDb a = valuesDb.get(e.getKey());
if (a == null) {
a = new ApplicationDataMapValueDb();
a.name = e.getKey();
a.value = e.getValue();
a.applicationDataMap = this;
valuesDb.put(e.getKey(), a);
} else {
a.value = e.getValue();
}
}
// remove old entries
List<String> toRemove = Lists.newArrayList();
for (Entry<String, ApplicationDataMapValueDb> e : valuesDb.entrySet()) {
if (!values.containsKey(e.getKey())) {
toRemove.add(e.getKey());
}
}
for (String r : toRemove) {
valuesDb.remove(r);
}
}
/**
* set the state of the object after load
*/
@PostLoad
public void postLoad() {
values = new MapMaker().makeMap();
for (Entry<String, ApplicationDataMapValueDb> e : valuesDb.entrySet()) {
values.put(e.getKey(), e.getValue().value);
}
}
/**
* @return the application
*/
public ApplicationDb getApplication() {
return application;
}
/**
* @param applicationData the applicationData to set
*/
public void setApplication(ApplicationDb application) {
this.application = application;
}
/**
* @return the values
*/
public Map<String, String> getValues() {
return values;
}
/**
* @param values the values to set
*/
public void setValues(Map<String, String> values) {
this.values = values;
}
/**
* @return the objectId
*/
public long getObjectId() {
return objectId;
}
/**
* @return the version
*/
public long getVersion() {
return version;
}
/**
* @return the personId
*/
public String getPersonId() {
return personId;
}
/**
* @param personId the personId to set
*/
public void setPersonId(String personId) {
this.personId = personId;
}
}