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.eclipse.jdt.annotation.NonNull;
  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         // FIXME: clean this up, notably reuse unmodified lists
  39         this.value = new LinkedList<>();
  40         Iterables.addAll(value, node.getValue());
  41         this.dirty = true;
  42     }
  43
  44     public static @NonNull CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create() {
  45         return new ImmutableUnkeyedListNodeBuilder();
  46     }
  47
  48     public static @NonNull CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create(final int sizeHint) {
  49         return new ImmutableUnkeyedListNodeBuilder();
  50     }
  51
  52     public static @NonNull CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create(
  53             final UnkeyedListNode node) {
  54         if (!(node instanceof ImmutableUnkeyedListNode)) {
  55             throw new UnsupportedOperationException(String.format("Cannot initialize from class %s", node.getClass()));
  56         }
  57
  58         return new ImmutableUnkeyedListNodeBuilder((ImmutableUnkeyedListNode) node);
  59     }
  60
  61     private void checkDirty() {
  62         if (dirty) {
  63             value = new LinkedList<>(value);
  64             dirty = false;
  65         }
  66     }
  67
  68     @Override
  69     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withChild(final UnkeyedListEntryNode child) {
  70         checkDirty();
  71         this.value.add(child);
  72         return this;
  73     }
  74
  75     @Override
  76     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withoutChild(
  77             final PathArgument key) {
  78         checkDirty();
  79         throw new UnsupportedOperationException("Children does not have identifiers.");
  80     }
  81
  82     @Override
  83     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withValue(
  84             final Collection<UnkeyedListEntryNode> withValue) {
  85         // TODO replace or putAll ?
  86         for (final UnkeyedListEntryNode node : withValue) {
  87             withChild(node);
  88         }
  89
  90         return this;
  91     }
  92
  93     @Override
  94     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withNodeIdentifier(
  95             final NodeIdentifier withNodeIdentifier) {
  96         this.nodeIdentifier = withNodeIdentifier;
  97         return this;
  98     }
  99
 100     @Override
 101     public UnkeyedListNode build() {
 102         dirty = true;
 103         if (value.isEmpty()) {
 104             return new EmptyImmutableUnkeyedListNode(nodeIdentifier);
 105         }
 106         return new ImmutableUnkeyedListNode(nodeIdentifier, ImmutableList.copyOf(value));
 107     }
 108
 109     @Override
 110     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> addChild(final UnkeyedListEntryNode child) {
 111         return withChild(child);
 112     }
 113
 114     @Override
 115     public NormalizedNodeContainerBuilder<NodeIdentifier, PathArgument, UnkeyedListEntryNode, UnkeyedListNode>
 116             removeChild(final PathArgument key) {
 117         return withoutChild(key);
 118     }
 119
 120     protected static final class EmptyImmutableUnkeyedListNode extends
 121             AbstractImmutableNormalizedNode<NodeIdentifier, Collection<UnkeyedListEntryNode>> implements
 122             UnkeyedListNode {
 123         protected EmptyImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier) {
 124             super(nodeIdentifier);
 125         }
 126
 127         @Override
 128         public ImmutableList<UnkeyedListEntryNode> getValue() {
 129             return ImmutableList.of();
 130         }
 131
 132         @Override
 133         public UnkeyedListEntryNode getChild(final int position) {
 134             throw new IndexOutOfBoundsException();
 135         }
 136
 137         @Override
 138         public int getSize() {
 139             return 0;
 140         }
 141
 142         @Override
 143         protected boolean valueEquals(final AbstractImmutableNormalizedNode<?, ?> other) {
 144             return Collections.emptyList().equals(other.getValue());
 145         }
 146
 147         @Override
 148         protected int valueHashCode() {
 149             return 1;
 150         }
 151     }
 152
 153     protected static final class ImmutableUnkeyedListNode extends
 154             AbstractImmutableNormalizedValueNode<NodeIdentifier, Collection<UnkeyedListEntryNode>>
 155             implements UnkeyedListNode {
 156
 157         private final ImmutableList<UnkeyedListEntryNode> children;
 158
 159         ImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier,
 160                 final ImmutableList<UnkeyedListEntryNode> children) {
 161             super(nodeIdentifier, children);
 162             this.children = children;
 163         }
 164
 165         @Override
 166         protected int valueHashCode() {
 167             return children.hashCode();
 168         }
 169
 170         @Override
 171         protected boolean valueEquals(final AbstractImmutableNormalizedNode<?, ?> other) {
 172             return children.equals(((ImmutableUnkeyedListNode) other).children);
 173         }
 174
 175         @Override
 176         public UnkeyedListEntryNode getChild(final int position) {
 177             return children.get(position);
 178         }
 179
 180         @Override
 181         public int getSize() {
 182             return children.size();
 183         }
 184     }
 185 }