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119 lines
5 KiB
Java
119 lines
5 KiB
Java
package com.google.common.graph;
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import com.google.common.base.Preconditions;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.UnmodifiableIterator;
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import java.util.Collection;
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import java.util.Objects;
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/* JADX INFO: Access modifiers changed from: package-private */
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@ElementTypesAreNonnullByDefault
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/* loaded from: classes3.dex */
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public final class StandardMutableNetwork<N, E> extends StandardNetwork<N, E> implements MutableNetwork<N, E> {
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/* JADX INFO: Access modifiers changed from: package-private */
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public StandardMutableNetwork(NetworkBuilder<? super N, ? super E> networkBuilder) {
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super(networkBuilder);
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}
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@Override // com.google.common.graph.MutableNetwork
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public boolean addNode(N n) {
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Preconditions.checkNotNull(n, "node");
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if (containsNode(n)) {
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return false;
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}
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addNodeInternal(n);
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return true;
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}
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private NetworkConnections<N, E> addNodeInternal(N n) {
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NetworkConnections<N, E> newConnections = newConnections();
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Preconditions.checkState(this.nodeConnections.put(n, newConnections) == null);
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return newConnections;
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}
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@Override // com.google.common.graph.MutableNetwork
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public boolean addEdge(N n, N n2, E e) {
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Preconditions.checkNotNull(n, "nodeU");
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Preconditions.checkNotNull(n2, "nodeV");
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Preconditions.checkNotNull(e, "edge");
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if (containsEdge(e)) {
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EndpointPair<N> incidentNodes = incidentNodes(e);
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EndpointPair of = EndpointPair.of(this, n, n2);
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Preconditions.checkArgument(incidentNodes.equals(of), "Edge %s already exists between the following nodes: %s, so it cannot be reused to connect the following nodes: %s.", e, incidentNodes, of);
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return false;
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}
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NetworkConnections<N, E> networkConnections = this.nodeConnections.get(n);
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if (!allowsParallelEdges()) {
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Preconditions.checkArgument(networkConnections == null || !networkConnections.successors().contains(n2), "Nodes %s and %s are already connected by a different edge. To construct a graph that allows parallel edges, call allowsParallelEdges(true) on the Builder.", n, n2);
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}
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boolean equals = n.equals(n2);
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if (!allowsSelfLoops()) {
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Preconditions.checkArgument(!equals, "Cannot add self-loop edge on node %s, as self-loops are not allowed. To construct a graph that allows self-loops, call allowsSelfLoops(true) on the Builder.", n);
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}
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if (networkConnections == null) {
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networkConnections = addNodeInternal(n);
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}
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networkConnections.addOutEdge(e, n2);
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NetworkConnections<N, E> networkConnections2 = this.nodeConnections.get(n2);
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if (networkConnections2 == null) {
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networkConnections2 = addNodeInternal(n2);
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}
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networkConnections2.addInEdge(e, n, equals);
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this.edgeToReferenceNode.put(e, n);
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return true;
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}
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@Override // com.google.common.graph.MutableNetwork
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public boolean addEdge(EndpointPair<N> endpointPair, E e) {
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validateEndpoints(endpointPair);
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return addEdge(endpointPair.nodeU(), endpointPair.nodeV(), e);
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}
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@Override // com.google.common.graph.MutableNetwork
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public boolean removeNode(N n) {
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Preconditions.checkNotNull(n, "node");
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NetworkConnections<N, E> networkConnections = this.nodeConnections.get(n);
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if (networkConnections == null) {
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return false;
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}
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UnmodifiableIterator<E> it = ImmutableList.copyOf((Collection) networkConnections.incidentEdges()).iterator();
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while (it.hasNext()) {
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removeEdge(it.next());
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}
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this.nodeConnections.remove(n);
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return true;
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}
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@Override // com.google.common.graph.MutableNetwork
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public boolean removeEdge(E e) {
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Preconditions.checkNotNull(e, "edge");
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N n = this.edgeToReferenceNode.get(e);
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boolean z = false;
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if (n == null) {
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return false;
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}
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NetworkConnections networkConnections = (NetworkConnections) Objects.requireNonNull(this.nodeConnections.get(n));
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Object adjacentNode = networkConnections.adjacentNode(e);
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NetworkConnections networkConnections2 = (NetworkConnections) Objects.requireNonNull(this.nodeConnections.get(adjacentNode));
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networkConnections.removeOutEdge(e);
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if (allowsSelfLoops() && n.equals(adjacentNode)) {
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z = true;
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}
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networkConnections2.removeInEdge(e, z);
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this.edgeToReferenceNode.remove(e);
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return true;
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}
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private NetworkConnections<N, E> newConnections() {
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if (isDirected()) {
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if (allowsParallelEdges()) {
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return DirectedMultiNetworkConnections.of();
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}
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return DirectedNetworkConnections.of();
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}
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if (allowsParallelEdges()) {
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return UndirectedMultiNetworkConnections.of();
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}
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return UndirectedNetworkConnections.of();
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}
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}
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