materialize the manytomany relationship to have better control over queries

src/main/java/com/commafeed/backend/model/FeedFeedEntry.java

@@ -0,0 +1,57 @@
+package com.commafeed.backend.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Cacheable;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
+
+import org.hibernate.annotations.Cache;
+import org.hibernate.annotations.CacheConcurrencyStrategy;
+
+@Entity
+@Table(name = "FEED_FEEDENTRIES")
+@SuppressWarnings("serial")
+@Cacheable
+@Cache(usage = CacheConcurrencyStrategy.TRANSACTIONAL)
+public class FeedFeedEntry implements Serializable {
+
+	@Id
+	@ManyToOne
+	@JoinColumn(name = "FEED_ID")
+	private Feed feed;
+
+	@Id
+	@ManyToOne
+	@JoinColumn(name = "FEEDENTRY_ID")
+	private FeedEntry entry;
+
+	public FeedFeedEntry() {
+
+	}
+
+	public FeedFeedEntry(Feed feed, FeedEntry entry) {
+		this.feed = feed;
+		this.entry = entry;
+	}
+
+	public Feed getFeed() {
+		return feed;
+	}
+
+	public void setFeed(Feed feed) {
+		this.feed = feed;
+	}
+
+	public FeedEntry getEntry() {
+		return entry;
+	}
+
+	public void setEntry(FeedEntry entry) {
+		this.entry = entry;
+	}
+
+}