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jNDN is a new implementation of a Named Data Networking client library written in Java. It is wire format compatible with the new NDN-TLV encoding, with NDNx and PARC's CCNx.

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/**
 * Copyright (C) 2017 Regents of the University of California.
 * @author: Yingdi Yu 
 * @author: Jeff Thompson 
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 * A copy of the GNU Lesser General Public License is in the file COPYING.
 */

package net.named_data.jndn.util.regex;

import java.util.ArrayList;

public class NdnRegexBackrefManager {
  public final int
  pushRef(NdnRegexMatcherBase matcher)
  {
    int last = backrefs_.size();
    backrefs_.add(matcher);

    return last;
  }

  public final void
  popRef() { backrefs_.remove(backrefs_.size() - 1); }

  public final int
  size() { return backrefs_.size(); }

  public final NdnRegexMatcherBase
  getBackref(int i) { return backrefs_.get(i); }

  private final ArrayList backrefs_ =
    new ArrayList();
}