#115 - Mapping - Add support for @ElementCollection enhancement

Add embedded bean support

src/main/java/io/ebeaninternal/server/deploy/BeanDescriptorElementEmbedded.java

@@ -0,0 +1,79 @@
+package io.ebeaninternal.server.deploy;
+
+import io.ebean.PersistenceIOException;
+import io.ebean.SqlUpdate;
+import io.ebean.bean.EntityBean;
+import io.ebeaninternal.server.deploy.meta.DeployBeanDescriptor;
+import io.ebeaninternal.server.text.json.ReadJson;
+import io.ebeaninternal.server.text.json.SpiJsonWriter;
+
+import java.io.IOException;
+
+/**
+ * Bean descriptor used with element collection of list/set of embeddable.
+ */
+class BeanDescriptorElementEmbedded<T> extends BeanDescriptorElement<T> {
+
+  private final BeanPropertyAssocOne embeddedProperty;
+
+  private final EntityBean prototype;
+
+  private BeanDescriptor targetDescriptor;
+
+  BeanDescriptorElementEmbedded(BeanDescriptorMap owner, DeployBeanDescriptor<T> deploy, ElementHelp elementHelp) {
+    super(owner, deploy, elementHelp);
+    try {
+      this.prototype = (EntityBean) beanType.newInstance();
+    } catch (Exception e) {
+      throw new IllegalStateException("Unable to create entity bean prototype for "+beanType);
+    }
+    BeanPropertyAssocOne<?>[] embedded = propertiesEmbedded();
+    if (embedded.length == 1) {
+      embeddedProperty = embedded[0];
+    } else {
+      embeddedProperty = null;
+    }
+  }
+
+  @Override
+  public void initialiseOther(BeanDescriptorInitContext initContext) {
+    super.initialiseOther(initContext);
+    this.targetDescriptor = embeddedProperty.getTargetDescriptor();
+  }
+
+  @Override
+  public EntityBean createEntityBeanForJson() {
+    return (EntityBean)prototype._ebean_newInstance();
+  }
+
+  public void bindElementValue(SqlUpdate insert, Object value) {
+    targetDescriptor.bindElementValue(insert, value);
+  }
+
+  @Override
+  public void jsonWriteElement(SpiJsonWriter ctx, Object element) {
+    writeJsonElement(ctx, element);
+  }
+
+  @Override
+  public T jsonRead(ReadJson jsonRead, String path) throws IOException {
+    return readJsonElement(jsonRead, path);
+  }
+
+  @SuppressWarnings("unchecked")
+  T readJsonElement(ReadJson jsonRead, String path) throws IOException {
+    return (T)targetDescriptor.jsonRead(jsonRead, path);
+  }
+
+  void writeJsonElement(SpiJsonWriter ctx, Object element) {
+    try {
+      if (element == null) {
+        ctx.writeNull();
+      } else {
+        targetDescriptor.jsonWrite(ctx, (EntityBean)element);
+      }
+    } catch (IOException e) {
+      throw new PersistenceIOException(e);
+    }
+  }
+}