data/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.LinkedList;
  14 import java.util.List;
  15 import org.eclipse.jdt.annotation.NonNull;
  16 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  18 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
  19 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
  20 import org.opendaylight.yangtools.yang.data.api.schema.builder.CollectionNodeBuilder;
  21 import org.opendaylight.yangtools.yang.data.api.schema.builder.NormalizedNodeContainerBuilder;
  22 import org.opendaylight.yangtools.yang.data.impl.schema.nodes.AbstractImmutableNormalizedValueNode;
  23 import org.opendaylight.yangtools.yang.data.spi.node.AbstractNormalizedNode;
  24
  25 public class ImmutableUnkeyedListNodeBuilder implements CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> {
  26     private List<UnkeyedListEntryNode> value;
  27     private NodeIdentifier nodeIdentifier;
  28     private boolean dirty;
  29
  30     protected ImmutableUnkeyedListNodeBuilder() {
  31         this.value = new LinkedList<>();
  32         this.dirty = false;
  33     }
  34
  35     protected ImmutableUnkeyedListNodeBuilder(final ImmutableUnkeyedListNode node) {
  36         this.nodeIdentifier = node.getIdentifier();
  37         // FIXME: clean this up, notably reuse unmodified lists
  38         this.value = new LinkedList<>();
  39         Iterables.addAll(value, node.body());
  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(
  52             final UnkeyedListNode node) {
  53         if (!(node instanceof ImmutableUnkeyedListNode)) {
  54             throw new UnsupportedOperationException(String.format("Cannot initialize from class %s", node.getClass()));
  55         }
  56
  57         return new ImmutableUnkeyedListNodeBuilder((ImmutableUnkeyedListNode) node);
  58     }
  59
  60     private void checkDirty() {
  61         if (dirty) {
  62             value = new LinkedList<>(value);
  63             dirty = false;
  64         }
  65     }
  66
  67     @Override
  68     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withChild(final UnkeyedListEntryNode child) {
  69         checkDirty();
  70         this.value.add(child);
  71         return this;
  72     }
  73
  74     @Override
  75     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withoutChild(
  76             final PathArgument key) {
  77         checkDirty();
  78         throw new UnsupportedOperationException("Children does not have identifiers.");
  79     }
  80
  81     @Override
  82     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withValue(
  83             final Collection<UnkeyedListEntryNode> withValue) {
  84         // TODO replace or putAll ?
  85         for (final UnkeyedListEntryNode node : withValue) {
  86             withChild(node);
  87         }
  88
  89         return this;
  90     }
  91
  92     @Override
  93     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> withNodeIdentifier(
  94             final NodeIdentifier withNodeIdentifier) {
  95         this.nodeIdentifier = withNodeIdentifier;
  96         return this;
  97     }
  98
  99     @Override
 100     public UnkeyedListNode build() {
 101         dirty = true;
 102         if (value.isEmpty()) {
 103             return new EmptyImmutableUnkeyedListNode(nodeIdentifier);
 104         }
 105         return new ImmutableUnkeyedListNode(nodeIdentifier, ImmutableList.copyOf(value));
 106     }
 107
 108     @Override
 109     public CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> addChild(final UnkeyedListEntryNode child) {
 110         return withChild(child);
 111     }
 112
 113     @Override
 114     public NormalizedNodeContainerBuilder<NodeIdentifier, PathArgument, UnkeyedListEntryNode, UnkeyedListNode>
 115             removeChild(final PathArgument key) {
 116         return withoutChild(key);
 117     }
 118
 119     protected static final class EmptyImmutableUnkeyedListNode
 120             extends AbstractNormalizedNode<NodeIdentifier, UnkeyedListNode> implements UnkeyedListNode {
 121         protected EmptyImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier) {
 122             super(nodeIdentifier);
 123         }
 124
 125         @Override
 126         public ImmutableList<UnkeyedListEntryNode> body() {
 127             return ImmutableList.of();
 128         }
 129
 130         @Override
 131         public UnkeyedListEntryNode childAt(final int position) {
 132             throw new IndexOutOfBoundsException();
 133         }
 134
 135         @Override
 136         public int size() {
 137             return 0;
 138         }
 139
 140         @Override
 141         protected Class<UnkeyedListNode> implementedType() {
 142             return UnkeyedListNode.class;
 143         }
 144
 145         @Override
 146         protected int valueHashCode() {
 147             return 1;
 148         }
 149
 150         @Override
 151         protected boolean valueEquals(final UnkeyedListNode other) {
 152             return other.isEmpty();
 153         }
 154     }
 155
 156     protected static final class ImmutableUnkeyedListNode
 157             extends AbstractImmutableNormalizedValueNode<NodeIdentifier, UnkeyedListNode,
 158                 Collection<@NonNull UnkeyedListEntryNode>>
 159             implements UnkeyedListNode {
 160
 161         private final ImmutableList<UnkeyedListEntryNode> children;
 162
 163         ImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier,
 164                 final ImmutableList<UnkeyedListEntryNode> children) {
 165             super(nodeIdentifier, children);
 166             this.children = children;
 167         }
 168
 169         @Override
 170         public UnkeyedListEntryNode childAt(final int position) {
 171             return children.get(position);
 172         }
 173
 174         @Override
 175         public int size() {
 176             return children.size();
 177         }
 178
 179         @Override
 180         protected Class<UnkeyedListNode> implementedType() {
 181             return UnkeyedListNode.class;
 182         }
 183
 184         @Override
 185         protected int valueHashCode() {
 186             return children.hashCode();
 187         }
 188
 189         @Override
 190         protected boolean valueEquals(final UnkeyedListNode other) {
 191             final Collection<UnkeyedListEntryNode> otherChildren;
 192             if (other instanceof ImmutableUnkeyedListNode) {
 193                 otherChildren = ((ImmutableUnkeyedListNode) other).children;
 194             } else {
 195                 otherChildren = other.body();
 196             }
 197             return otherChildren instanceof List ? children.equals(otherChildren)
 198                 : Iterables.elementsEqual(children, otherChildren);
 199         }
 200     }
 201 }