diff options
Diffstat (limited to 'android/guava/src/com/google/common/graph/ImmutableGraph.java')
-rw-r--r-- | android/guava/src/com/google/common/graph/ImmutableGraph.java | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/android/guava/src/com/google/common/graph/ImmutableGraph.java b/android/guava/src/com/google/common/graph/ImmutableGraph.java deleted file mode 100644 index c878a5c53..000000000 --- a/android/guava/src/com/google/common/graph/ImmutableGraph.java +++ /dev/null @@ -1,98 +0,0 @@ -/* - * Copyright (C) 2014 The Guava Authors - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.google.common.graph; - -import static com.google.common.base.Preconditions.checkNotNull; - -import com.google.common.annotations.Beta; -import com.google.common.base.Function; -import com.google.common.base.Functions; -import com.google.common.collect.ImmutableMap; -import com.google.common.collect.Maps; -import com.google.common.graph.GraphConstants.Presence; -import com.google.errorprone.annotations.Immutable; - -/** - * A {@link Graph} whose elements and structural relationships will never change. Instances of this - * class may be obtained with {@link #copyOf(Graph)}. - * - * <p>See the Guava User's Guide's <a - * href="https://github.com/google/guava/wiki/GraphsExplained#immutable-implementations">discussion - * of the {@code Immutable*} types</a> for more information on the properties and guarantees - * provided by this class. - * - * @author James Sexton - * @author Joshua O'Madadhain - * @author Omar Darwish - * @param <N> Node parameter type - * @since 20.0 - */ -@Beta -@Immutable(containerOf = {"N"}) -public class ImmutableGraph<N> extends ForwardingGraph<N> { - @SuppressWarnings("Immutable") // The backing graph must be immutable. - private final BaseGraph<N> backingGraph; - - ImmutableGraph(BaseGraph<N> backingGraph) { - this.backingGraph = backingGraph; - } - - /** Returns an immutable copy of {@code graph}. */ - public static <N> ImmutableGraph<N> copyOf(Graph<N> graph) { - return (graph instanceof ImmutableGraph) - ? (ImmutableGraph<N>) graph - : new ImmutableGraph<N>( - new ConfigurableValueGraph<N, Presence>( - GraphBuilder.from(graph), getNodeConnections(graph), graph.edges().size())); - } - - /** - * Simply returns its argument. - * - * @deprecated no need to use this - */ - @Deprecated - public static <N> ImmutableGraph<N> copyOf(ImmutableGraph<N> graph) { - return checkNotNull(graph); - } - - private static <N> ImmutableMap<N, GraphConnections<N, Presence>> getNodeConnections( - Graph<N> graph) { - // ImmutableMap.Builder maintains the order of the elements as inserted, so the map will have - // whatever ordering the graph's nodes do, so ImmutableSortedMap is unnecessary even if the - // input nodes are sorted. - ImmutableMap.Builder<N, GraphConnections<N, Presence>> nodeConnections = ImmutableMap.builder(); - for (N node : graph.nodes()) { - nodeConnections.put(node, connectionsOf(graph, node)); - } - return nodeConnections.build(); - } - - private static <N> GraphConnections<N, Presence> connectionsOf(Graph<N> graph, N node) { - Function<Object, Presence> edgeValueFn = Functions.constant(Presence.EDGE_EXISTS); - return graph.isDirected() - ? DirectedGraphConnections.ofImmutable( - graph.predecessors(node), Maps.asMap(graph.successors(node), edgeValueFn)) - : UndirectedGraphConnections.ofImmutable( - Maps.asMap(graph.adjacentNodes(node), edgeValueFn)); - } - - @Override - protected BaseGraph<N> delegate() { - return backingGraph; - } -} |