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         // 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 CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create() {
  45         return new ImmutableUnkeyedListNodeBuilder();
  46     }
  47
  48     public static CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create(final int sizeHint) {
  49         return new ImmutableUnkeyedListNodeBuilder();
  50     }
  51
  52     public static CollectionNodeBuilder<UnkeyedListEntryNode, UnkeyedListNode> create(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 extends
 120             AbstractImmutableNormalizedNode<NodeIdentifier, Collection<UnkeyedListEntryNode>> implements Immutable,
 121             UnkeyedListNode {
 122         protected EmptyImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier) {
 123             super(nodeIdentifier);
 124         }
 125
 126         @Override
 127         public Collection<UnkeyedListEntryNode> getValue() {
 128             return Collections.emptySet();
 129         }
 130
 131         @Override
 132         public UnkeyedListEntryNode getChild(final int position) {
 133             throw new IndexOutOfBoundsException();
 134         }
 135
 136         @Override
 137         public int getSize() {
 138             return 0;
 139         }
 140
 141         @Override
 142         protected boolean valueEquals(final AbstractImmutableNormalizedNode<?, ?> other) {
 143             return Collections.EMPTY_LIST.equals(other.getValue());
 144         }
 145
 146         @Override
 147         protected int valueHashCode() {
 148             return Collections.EMPTY_LIST.hashCode();
 149         }
 150     }
 151
 152     protected static final class ImmutableUnkeyedListNode extends
 153             AbstractImmutableNormalizedValueNode<NodeIdentifier, Collection<UnkeyedListEntryNode>>
 154             implements Immutable, UnkeyedListNode {
 155
 156         private final ImmutableList<UnkeyedListEntryNode> children;
 157
 158         ImmutableUnkeyedListNode(final NodeIdentifier nodeIdentifier,
 159                 final ImmutableList<UnkeyedListEntryNode> children) {
 160             super(nodeIdentifier, children);
 161             this.children = children;
 162         }
 163
 164         @Override
 165         protected int valueHashCode() {
 166             return children.hashCode();
 167         }
 168
 169         @Override
 170         protected boolean valueEquals(final AbstractImmutableNormalizedNode<?, ?> other) {
 171             return children.equals(((ImmutableUnkeyedListNode) other).children);
 172         }
 173
 174         @Override
 175         public UnkeyedListEntryNode getChild(final int position) {
 176             return children.get(position);
 177         }
 178
 179         @Override
 180         public int getSize() {
 181             return children.size();
 182         }
 183     }
 184 }