model framework changes necessary to support derived id's

1 files changed, 71 insertions, 0 deletions

diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/context/java/NullSpecifiedJavaAttributeMappingProvider.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/context/java/NullSpecifiedJavaAttributeMappingProvider.java
new file mode 100644
index 0000000000..a36b941c17
--- /dev/null
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/context/java/NullSpecifiedJavaAttributeMappingProvider.java
@@ -0,0 +1,71 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Oracle. All rights reserved.
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0, which accompanies this distribution
+ * and is available at http://www.eclipse.org/legal/epl-v10.html.
+ * 
+ * Contributors:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.core.context.java;
+
+import org.eclipse.jpt.core.JpaFactory;
+import org.eclipse.jpt.core.MappingKeys;
+
+/**
+ * This mapping provider implementation is used to describe the specified mapping for 
+ * a java attribute when no other mapping applies.
+ */
+public class NullSpecifiedJavaAttributeMappingProvider
+	implements JavaAttributeMappingProvider
+{
+	// singleton
+	private static final NullSpecifiedJavaAttributeMappingProvider INSTANCE = 
+		new NullSpecifiedJavaAttributeMappingProvider();
+	
+	
+	/**
+	 * Return the singleton.
+	 */
+	public static JavaAttributeMappingProvider instance() {
+		return INSTANCE;
+	}
+	
+	
+	/**
+	 * Enforce singleton usage
+	 */
+	private NullSpecifiedJavaAttributeMappingProvider() {
+		super();
+	}
+	
+	
+	public String getKey() {
+		return MappingKeys.NULL_ATTRIBUTE_MAPPING_KEY;
+	}
+	
+	public String getAnnotationName() {
+		return null;
+	}
+	
+	/**
+	 * There is no specified mapping in this case, attributes should revert to the default
+	 */
+	public JavaAttributeMapping buildMapping(JavaPersistentAttribute parent, JpaFactory factory) {
+		return null;
+	}
+	
+	/**
+	 * Obviously false
+	 */
+	public boolean defaultApplies(JavaPersistentAttribute persistentAttribute) {
+		return false;
+	}
+	
+	/**
+	 * This is typically the final test, so it should always apply
+	 */
+	public boolean specifiedApplies(JavaPersistentAttribute persistentAttribute) {
+		return true;
+	}
+}