2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.binding.data.codec.impl;
10 import com.google.common.base.Preconditions;
11 import com.google.common.base.Throwables;
12 import java.lang.invoke.MethodHandle;
13 import java.lang.invoke.MethodHandles;
14 import java.lang.invoke.MethodHandles.Lookup;
15 import java.lang.invoke.MethodType;
16 import java.lang.reflect.Method;
17 import java.util.concurrent.Callable;
18 import org.opendaylight.yangtools.binding.data.codec.impl.ValueTypeCodec.SchemaUnawareCodec;
22 * Derived YANG types are just immutable value holders for simple value
23 * types, which are same as in NormalizedNode model.
26 final class EncapsulatedValueCodec extends ReflectionBasedCodec implements SchemaUnawareCodec {
27 private static final Lookup LOOKUP = MethodHandles.publicLookup();
28 private static final MethodType OBJ_METHOD = MethodType.methodType(Object.class, Object.class);
29 private final MethodHandle constructor;
30 private final MethodHandle getter;
31 private final Class<?> valueType;
33 private EncapsulatedValueCodec(final Class<?> typeClz, final MethodHandle constructor, final MethodHandle getter,
34 final Class<?> valueType) {
36 this.constructor = Preconditions.checkNotNull(constructor);
37 this.getter = Preconditions.checkNotNull(getter);
38 this.valueType = Preconditions.checkNotNull(valueType);
41 static Callable<EncapsulatedValueCodec> loader(final Class<?> typeClz) {
42 return new Callable<EncapsulatedValueCodec>() {
44 public EncapsulatedValueCodec call() throws IllegalAccessException, NoSuchMethodException, SecurityException {
45 final Method m = typeClz.getMethod("getValue");
46 final MethodHandle getter = LOOKUP.unreflect(m).asType(OBJ_METHOD);
47 final Class<?> valueType = m.getReturnType();
49 final MethodHandle constructor = LOOKUP.findConstructor(typeClz,
50 MethodType.methodType(void.class, valueType)).asType(OBJ_METHOD);
51 return new EncapsulatedValueCodec(typeClz, constructor, getter, valueType);
57 * Quick check if a value object has a chance to deserialize using {@link #deserialize(Object)}.
59 * @param value Value to be checked
60 * @return True if the value can be encapsulated
62 boolean canAcceptObject(final Object value) {
63 return valueType.isInstance(value);
67 public Object deserialize(final Object input) {
69 return constructor.invokeExact(input);
70 } catch (Throwable e) {
71 throw Throwables.propagate(e);
76 public Object serialize(final Object input) {
78 return getter.invokeExact(input);
79 } catch (Throwable e) {
80 throw Throwables.propagate(e);