60 lines
1.8 KiB
Java
60 lines
1.8 KiB
Java
/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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package org.deeplearning4j.graph.graph;
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import org.deeplearning4j.graph.api.IGraph;
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import org.deeplearning4j.graph.api.IVertexSequence;
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import org.deeplearning4j.graph.api.Vertex;
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import java.util.NoSuchElementException;
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/**A vertex sequence represents a sequences of vertices in a graph
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* @author Alex Black
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*/
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public class VertexSequence<V> implements IVertexSequence<V> {
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private final IGraph<V, ?> graph;
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private int[] indices;
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private int currIdx = 0;
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public VertexSequence(IGraph<V, ?> graph, int[] indices) {
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this.graph = graph;
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this.indices = indices;
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}
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@Override
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public int sequenceLength() {
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return indices.length;
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}
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@Override
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public boolean hasNext() {
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return currIdx < indices.length;
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}
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@Override
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public Vertex<V> next() {
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if (!hasNext())
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throw new NoSuchElementException();
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return graph.getVertex(indices[currIdx++]);
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}
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@Override
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public void remove() {
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throw new UnsupportedOperationException();
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}
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}
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