#115 - Mapping - Add support for @ElementCollection enhancement

Initial support - simple List.

src/main/java/io/ebeaninternal/server/query/STreePropertyAssoc.java

@@ -0,0 +1,39 @@
+package io.ebeaninternal.server.query;
+
+import io.ebean.bean.EntityBean;
+import io.ebeaninternal.server.deploy.DbSqlContext;
+import io.ebeaninternal.server.deploy.id.IdBinder;
+
+public interface STreePropertyAssoc extends STreeProperty {
+
+  /**
+   * Return the extra where clause if set.
+   */
+  String getExtraWhere();
+
+  /**
+   * Return the type of the target (other side).
+   */
+  STreeType target();
+
+  /**
+   * Return the IdBinder of the underlying type.
+   */
+  IdBinder getIdBinder();
+
+  /**
+   * Add a Join with the given alias.
+   */
+  SqlJoinType addJoin(SqlJoinType joinType, String alias2, String alias, DbSqlContext ctx);
+
+  /**
+   * Add a Join with the given prefix (determining the alias).
+   */
+  SqlJoinType addJoin(SqlJoinType joinType, String prefix, DbSqlContext ctx);
+
+  /**
+   * Add a bean to the parent.
+   */
+  void setValue(EntityBean parentBean, Object contextBean);
+
+}