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A Java Optimization Framework

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package soot.shimple.internal;

/*-
 * #%L
 * Soot - a J*va Optimization Framework
 * %%
 * Copyright (C) 2003 Navindra Umanee 
 * %%
 * 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 2.1 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
 * .
 * #L%
 */

import soot.UnitBox;

/**
 * Extension of UnitBox to provide some extra information needed by SPatchingChain.
 *
 * @author Navindra Umanee
 */
public interface SUnitBox extends UnitBox {
  /**
   * Indicates whether the contents of the UnitBox may have been changed. Returns true if setUnit(Unit) has been called
   * recently and was not followed by setUnitChanged(false).
   *
   * 
   * Needed for Shimple internal Unit chain patching.
   */
  public boolean isUnitChanged();

  /**
   * Updates the value of the flag used to indicate whether the contents of the UnitBox may have changed.
   *
   * 
   * Needed for Shimple internal Unit chain patching.
   *
   * @see #isUnitChanged()
   */
  public void setUnitChanged(boolean unitChanged);
}