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T. J. Watson Libraries for Analysis

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/*
 * Copyright (c) 2002 - 2006 IBM Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 */
package com.ibm.wala.util.graph.traverse;

import com.ibm.wala.util.graph.Graph;
import java.util.Iterator;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

abstract class GraphDFSDiscoverTimeIterator extends DFSDiscoverTimeIterator {

  private static final long serialVersionUID = -5673397879499010863L;

  /** the graph being searched */
  private @Nullable Graph G;

  protected void init(Graph G, Iterator nodes) {
    if (G == null) {
      throw new IllegalArgumentException("G is null");
    }
    this.G = G;
    super.init(nodes);
  }

  @NullUnmarked
  @Override
  protected Iterator getConnected(T n) {
    return G.getSuccNodes(n);
  }
}