opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/AbstractForwardedTransaction.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.controller.md.sal.binding.impl;
   9
  10 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  11 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  12 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  13 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadTransaction;
  14 import org.opendaylight.yangtools.concepts.Delegator;
  15 import org.opendaylight.yangtools.concepts.Identifiable;
  16 import org.opendaylight.yangtools.util.concurrent.MappingCheckedFuture;
  17 import org.opendaylight.yangtools.yang.binding.DataObject;
  18 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  19 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  20
  21 import com.google.common.base.Optional;
  22 import com.google.common.base.Preconditions;
  23 import com.google.common.util.concurrent.CheckedFuture;
  24 import com.google.common.util.concurrent.Futures;
  25
  26
  27 abstract class AbstractForwardedTransaction<T extends AsyncTransaction<YangInstanceIdentifier, NormalizedNode<?, ?>>>
  28         implements Delegator<T>, Identifiable<Object> {
  29
  30     private final T delegate;
  31     private final BindingToNormalizedNodeCodec codec;
  32
  33     public AbstractForwardedTransaction(final T delegateTx, final BindingToNormalizedNodeCodec codec) {
  34         this.delegate = Preconditions.checkNotNull(delegateTx, "Delegate must not be null");
  35         this.codec = Preconditions.checkNotNull(codec, "Codec must not be null");
  36     }
  37
  38
  39     @Override
  40     public final  Object getIdentifier() {
  41         return delegate.getIdentifier();
  42     }
  43
  44     @Override
  45     public final  T getDelegate() {
  46         return delegate;
  47     }
  48
  49     @SuppressWarnings("unchecked")
  50     protected final <S extends AsyncTransaction<YangInstanceIdentifier, NormalizedNode<?, ?>>> S getDelegateChecked(final Class<S> txType) {
  51         Preconditions.checkState(txType.isInstance(delegate));
  52         return (S) delegate;
  53     }
  54
  55     protected final BindingToNormalizedNodeCodec getCodec() {
  56         return codec;
  57     }
  58
  59     protected final <T extends DataObject> CheckedFuture<Optional<T>,ReadFailedException> doRead(
  60             final DOMDataReadTransaction readTx, final LogicalDatastoreType store,
  61             final org.opendaylight.yangtools.yang.binding.InstanceIdentifier<T> path) {
  62
  63         return MappingCheckedFuture.create(
  64                     Futures.transform(readTx.read(store, codec.toNormalized(path)),
  65                                       codec.deserializeFunction(path)),
  66                     ReadFailedException.MAPPER);
  67     }
  68 }