yang/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/schema/builder/impl/ImmutableUnkeyedListNodeBuilder.java

   1 /*
   2  * Copyright (c) 2013 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.yang.data.impl.schema.builder.impl;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import com.google.common.collect.Iterables;
  12 import java.util.Collection;
  13 import java.util.Collections;
  14 import java.util.LinkedList;
  15 import java.util.List;
  16 import org.opendaylight.yangtools.concepts.Immutable;
  17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  18 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  19 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
  20 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
  21 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
  22 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeContainerBuilder;
  23 import org.opendaylight.yangtools.yang.data.impl.schema.nodes.AbstractImmutableNormalizedNode;
  24 import org.opendaylight.yangtools.yang.data.impl.schema.nodes.AbstractImmutableNormalizedValueNode;
  25
  26 public class ImmutableUnkeyedListNodeBuilder implements CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> {
  27     private List<UnkeyedListEntryNode> value;
  28     private NodeIdentifier nodeIdentifier;
  29     private boolean dirty;
  30
  31     protected ImmutableUnkeyedListNodeBuilder() {
  32         this.value = new LinkedList<>();
  33         this.dirty = false;
  34     }
  35
  36     protected ImmutableUnkeyedListNodeBuilder(final ImmutableUnkeyedListNode node) {
  37         this.nodeIdentifier = node.getIdentifier();
  38         this.value = new LinkedList<>();
  39         Iterables.addAll(value, node.getValue());
  40         this.dirty = true;
  41     }
  42
  43     public static CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create() {
  44         return new ImmutableUnkeyedListNodeBuilder();
  45     }
  46
  47     public static CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create(final int sizeHint) {
  48         return new ImmutableUnkeyedListNodeBuilder();
  49     }
  50
  51     public static CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create(final UnkeyedListNode node) {
  52         if (!(node instanceof ImmutableUnkeyedListNode)) {
  53             throw new UnsupportedOperationException(String.format("Cannot initialize from class %s", node.getClass()));
  54         }
  55
  56         return new ImmutableUnkeyedListNodeBuilder((ImmutableUnkeyedListNode) node);
  57     }
  58
  59     private void checkDirty() {
  60         if (dirty) {
  61             value = new LinkedList<>(value);
  62             dirty = false;
  63         }
  64     }
  65
  66     @Override
  67     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withChild(final UnkeyedListEntryNode child) {
  68         checkDirty();
  69         this.value.add(child);
  70         return this;
  71     }
  72
  73     @Override
  74     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withoutChild(
  75             final PathArgument key) {
  76         checkDirty();
  77         throw new UnsupportedOperationException("Children does not have identifiers.");
  78     }
  79
  80     @Override
  81     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withValue(final Collection<UnkeyedListEntryNode> value) {
  82         // TODO replace or putAll ?
  83         for (final UnkeyedListEntryNode UnkeyedListEntryNode : value) {
  84             withChild(UnkeyedListEntryNode);
  85         }
  86
  87         return this;
  88     }
  89
  90     @Override
  91     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withNodeIdentifier(
  92             final NodeIdentifier nodeIdentifier) {
  93         this.nodeIdentifier = nodeIdentifier;
  94         return this;
  95     }
  96
  97     @Override
  98     public UnkeyedListNode build() {
  99         dirty = true;
 100         if (value.isEmpty()) {
 101             return new EmptyImmutableUnkeyedListNode(nodeIdentifier);
 102         } else {
 103             return new ImmutableUnkeyedListNode(nodeIdentifier, ImmutableList.copyOf(value));
 104         }
 105     }
 106
 107     @Override
 108     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> addChild(final UnkeyedListEntryNode child) {
 109         return withChild(child);
 110     }
 111
 112     @Override
 113     public NormalizedNodeContainerBuilder<NodeIdentifier, PathArgument, UnkeyedListEntryNode, UnkeyedListNode> removeChild(
 114             final PathArgument key) {
 115         return withoutChild(key);
 116     }
 117
 118     protected static final class EmptyImmutableUnkeyedListNode extends AbstractImmutableNormalizedNode<NodeIdentifier, Collection<UnkeyedListEntryNode>> implements Immutable, UnkeyedListNode {
 119         protected EmptyImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier) {
 120             super(nodeIdentifier);
 121         }
 122
 123         @Override
 124         public Collection<UnkeyedListEntryNode> getValue() {
 125             return Collections.emptySet();
 126         }
 127
 128         @Override
 129         public UnkeyedListEntryNode getChild(final int position) {
 130             throw new IndexOutOfBoundsException();
 131         }
 132
 133         @Override
 134         public int getSize() {
 135             return 0;
 136         }
 137
 138         @Override
 139         protected boolean valueEquals(final AbstractImmutableNormalizedNode<?, ?> other) {
 140             return Collections.EMPTY_LIST.equals(other.getValue());
 141         }
 142
 143         @Override
 144         protected int valueHashCode() {
 145             return Collections.EMPTY_LIST.hashCode();
 146         }
 147     }
 148
 149     protected static final class ImmutableUnkeyedListNode extends
 150             AbstractImmutableNormalizedValueNode<NodeIdentifier, Collection<UnkeyedListEntryNode>>
 151             implements Immutable, UnkeyedListNode {
 152
 153         private final ImmutableList<UnkeyedListEntryNode> children;
 154
 155         ImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier,
 156                 final ImmutableList<UnkeyedListEntryNode> children) {
 157             super(nodeIdentifier, children);
 158             this.children = children;
 159         }
 160
 161         @Override
 162         protected int valueHashCode() {
 163             return children.hashCode();
 164         }
 165
 166         @Override
 167         protected boolean valueEquals(final AbstractImmutableNormalizedNode<?, ?> other) {
 168             return children.equals(((ImmutableUnkeyedListNode) other).children);
 169         }
 170
 171         @Override
 172         public UnkeyedListEntryNode getChild(final int position) {
 173             return children.get(position);
 174         }
 175
 176         @Override
 177         public int getSize() {
 178             return children.size();
 179         }
 180     }
 181 }