Cleaned up Java Binding code from YANG Tools

[mdsal.git] / binding / mdsal-binding-dom-codec / src / main / java / org / opendaylight / yangtools / binding / data / codec / impl / EncapsulatedValueCodec.java

diff --git a/binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/yangtools/binding/data/codec/impl/EncapsulatedValueCodec.java b/binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/yangtools/binding/data/codec/impl/EncapsulatedValueCodec.java
new file mode 100644 (file)
index 0000000..3de5085
--- /dev/null
+++ b/binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/yangtools/binding/data/codec/impl/EncapsulatedValueCodec.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  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
+ */
+package org.opendaylight.yangtools.binding.data.codec.impl;
+
+import com.google.common.base.Preconditions;
+import com.google.common.base.Throwables;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+import java.util.concurrent.Callable;
+import org.opendaylight.yangtools.binding.data.codec.impl.ValueTypeCodec.SchemaUnawareCodec;
+
+/**
+ *
+ * Derived YANG types are just immutable value holders for simple value
+ * types, which are same as in NormalizedNode model.
+ *
+ */
+final class EncapsulatedValueCodec extends ReflectionBasedCodec implements SchemaUnawareCodec {
+    private static final Lookup LOOKUP = MethodHandles.publicLookup();
+    private static final MethodType OBJ_METHOD = MethodType.methodType(Object.class, Object.class);
+    private final MethodHandle constructor;
+    private final MethodHandle getter;
+
+    private EncapsulatedValueCodec(final Class<?> typeClz, final MethodHandle constructor, final MethodHandle getter) {
+        super(typeClz);
+        this.constructor = Preconditions.checkNotNull(constructor);
+        this.getter = Preconditions.checkNotNull(getter);
+    }
+
+    static Callable<EncapsulatedValueCodec> loader(final Class<?> typeClz) {
+        return new Callable<EncapsulatedValueCodec>() {
+            @Override
+            public EncapsulatedValueCodec call() throws Exception {
+                final Method m = typeClz.getMethod("getValue");
+                final MethodHandle getter = LOOKUP.unreflect(m).asType(OBJ_METHOD);
+                final MethodHandle constructor = LOOKUP.findConstructor(typeClz, MethodType.methodType(void.class, m.getReturnType())).asType(OBJ_METHOD);
+                return new EncapsulatedValueCodec(typeClz, constructor, getter);
+            }
+        };
+    }
+
+    @Override
+    public Object deserialize(final Object input) {
+        try {
+            return constructor.invokeExact(input);
+        } catch (Throwable e) {
+            throw Throwables.propagate(e);
+        }
+    }
+
+    @Override
+    public Object serialize(final Object input) {
+        try {
+            return getter.invokeExact(input);
+        } catch (Throwable e) {
+            throw Throwables.propagate(e);
+        }
+    }
+}
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