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/* Qilin - a Java Pointer Analysis Framework
 * Copyright (C) 2021-2030 Qilin developers
 *
 * 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 3.0 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 General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 */

package qilin.pta.toolkits.selectx;

import java.util.*;
import java.util.stream.Stream;
import qilin.core.pag.GlobalVarNode;

public class G extends BNode {
  public static Map g2GN = new HashMap<>();
  public static Map g2GP = new HashMap<>();

  public static G v(GlobalVarNode origin, boolean positive) {
    if (positive) {
      return g2GP.computeIfAbsent(origin, k -> new G(origin, true));
    } else {
      return g2GN.computeIfAbsent(origin, k -> new G(origin, false));
    }
  }

  private final Set outLs = new HashSet<>();
  private final boolean positive;

  G(GlobalVarNode origin, boolean positive) {
    super(origin);
    this.positive = positive;
  }

  public boolean addOutEdge(L toE) {
    return outLs.add(toE);
  }

  @Override
  public boolean addOutEdge(BNode toE) {
    return addOutEdge((L) toE);
  }

  @Override
  public Stream forwardTargets() {
    return outLs.stream();
  }
}