original

[gb-231r1-is01/GB_2.3_IS01.git] / cts / tools / signature-tools / src / signature / model / impl / Uninitialized.java

diff --git a/cts/tools/signature-tools/src/signature/model/impl/Uninitialized.java b/cts/tools/signature-tools/src/signature/model/impl/Uninitialized.java
new file mode 100644 (file)
index 0000000..cc88479
--- /dev/null
+++ b/cts/tools/signature-tools/src/signature/model/impl/Uninitialized.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed 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 signature.model.impl;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.List;
+import java.util.Set;
+
+import signature.model.IAnnotationField;
+import signature.model.IClassDefinition;
+import signature.model.IClassReference;
+import signature.model.IPackage;
+import signature.model.ITypeReference;
+import signature.model.ITypeVariableDefinition;
+import signature.model.ITypeVariableReference;
+import signature.model.Kind;
+
+/**
+ *
+ */
+public class Uninitialized {
+
+    private static final Object UNINITIALIZED;
+
+    static {
+        UNINITIALIZED = Proxy.newProxyInstance(Uninitialized.class
+                .getClassLoader(), new Class[] {
+                ITypeReference.class, IPackage.class, IClassDefinition.class,
+                IClassReference.class, ITypeVariableReference.class,
+                ITypeVariableDefinition.class, IAnnotationField.class,
+                Set.class, List.class}, new InvocationHandler() {
+            public Object invoke(Object proxy, Method method, Object[] args)
+                    throws Throwable {
+                if (method.getName().equals("toString")) {
+                    return "Uninitialized";
+                }
+
+                throw new UnsupportedOperationException();
+            }
+        });
+    }
+
+    @SuppressWarnings("unchecked")
+    public static <T> T unset() {
+        return (T) UNINITIALIZED;
+    }
+
+    public static boolean isInitialized(Object o) {
+        return o != UNINITIALIZED && o != Kind.UNINITIALIZED;
+    }
+}