code-generator/binding-data-codec/src/main/java/org/opendaylight/yangtools/binding/data/codec/impl/SchemaRootCodecContext.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.yangtools.binding.data.codec.impl;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.cache.CacheBuilder;
  13 import com.google.common.cache.CacheLoader;
  14 import com.google.common.cache.LoadingCache;
  15 import org.opendaylight.yangtools.util.ClassLoaderUtils;
  16 import org.opendaylight.yangtools.yang.binding.ChildOf;
  17 import org.opendaylight.yangtools.yang.binding.DataRoot;
  18 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  19 import org.opendaylight.yangtools.yang.common.QName;
  20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  21 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  22 import org.opendaylight.yangtools.yang.model.api.ChoiceNode;
  23 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
  24 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
  25 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  26
  27 class SchemaRootCodecContext extends DataContainerCodecContext<SchemaContext> {
  28
  29     private final LoadingCache<Class<?>, DataContainerCodecContext<?>> childrenByClass = CacheBuilder.newBuilder().build(
  30             new CacheLoader<Class<?>, DataContainerCodecContext<?>>() {
  31                 @Override
  32                 public DataContainerCodecContext<?> load(final Class<?> key) {
  33                     Class<Object> parent = ClassLoaderUtils.findFirstGenericArgument(key, ChildOf.class);
  34                     Preconditions.checkArgument(DataRoot.class.isAssignableFrom(parent));
  35                     QName qname = BindingReflections.findQName(key);
  36                     DataSchemaNode childSchema = schema().getDataChildByName(qname);
  37                     return DataContainerCodecPrototype.from(key, childSchema, factory()).get();
  38                 }
  39             });
  40
  41     private final LoadingCache<QName, DataContainerCodecContext<?>> childrenByQName = CacheBuilder.newBuilder().build(
  42         new CacheLoader<QName, DataContainerCodecContext<?>>() {
  43             @Override
  44             public DataContainerCodecContext<?> load(final QName qname) {
  45                 final DataSchemaNode childSchema = schema().getDataChildByName(qname);
  46                 Preconditions.checkArgument(childSchema != null, "Argument %s is not valid child of %s", qname, schema());
  47
  48                 if (childSchema instanceof DataNodeContainer || childSchema instanceof ChoiceNode) {
  49                     final Class<?> childCls = factory().getRuntimeContext().getClassForSchema(childSchema);
  50                     return getStreamChild(childCls);
  51                 } else {
  52                     throw new UnsupportedOperationException("Unsupported child type " + childSchema.getClass());
  53                 }
  54             }
  55         });
  56
  57     private SchemaRootCodecContext(final DataContainerCodecPrototype<SchemaContext> dataPrototype) {
  58         super(dataPrototype);
  59     }
  60
  61     /**
  62      * Creates RootNode from supplied CodecContextFactory.
  63      *
  64      * @param factory
  65      *            CodecContextFactory
  66      * @return
  67      */
  68     static SchemaRootCodecContext create(final CodecContextFactory factory) {
  69         DataContainerCodecPrototype<SchemaContext> prototype = DataContainerCodecPrototype.rootPrototype(factory);
  70         return new SchemaRootCodecContext(prototype);
  71     }
  72
  73     @Override
  74     protected DataContainerCodecContext<?> getStreamChild(final Class<?> childClass) {
  75         return childrenByClass.getUnchecked(childClass);
  76     }
  77
  78     @Override
  79     protected Optional<DataContainerCodecContext<?>> getPossibleStreamChild(final Class<?> childClass) {
  80         throw new UnsupportedOperationException("Not supported");
  81     }
  82
  83     @Override
  84     protected PathArgument getDomPathArgument() {
  85         throw new UnsupportedOperationException();
  86     }
  87
  88     @Override
  89     protected NodeCodecContext getYangIdentifierChild(final PathArgument arg) {
  90         return childrenByQName.getUnchecked(arg.getNodeType());
  91     }
  92
  93     @Override
  94     protected Object dataFromNormalizedNode(final NormalizedNode<?, ?> normalizedNode) {
  95         throw new UnsupportedOperationException("Could not create Binding data representation for root");
  96     }
  97 }