SourceAnnotation.java

/*
 * Copyright (C) 2009-2012 University of Freiburg
 *
 * This file is part of SMTInterpol.
 *
 * SMTInterpol 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.
 *
 * SMTInterpol 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 SMTInterpol.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.uni_freiburg.informatik.ultimate.smtinterpol.proof;

import de.uni_freiburg.informatik.ultimate.logic.Annotation;
import de.uni_freiburg.informatik.ultimate.logic.Term;
import de.uni_freiburg.informatik.ultimate.logic.Theory;
import de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.Clause;
import de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.IAnnotation;

/**
 * Class used to annotate the input formulas such that interpolation is able to
 * discover the origin of a clause.
 * @author Juergen Christ
 */
public class SourceAnnotation implements IAnnotation {
	public static final SourceAnnotation EMPTY_SOURCE_ANNOT =
			new SourceAnnotation("", null);
	private final String mAnnot;
	private final Term mSource;
	public SourceAnnotation(String annot, Term source) {
		mAnnot = annot;
		mSource = source;
	}
	public SourceAnnotation(SourceAnnotation orig, Term newSource) {
		mAnnot = orig.mAnnot;
		mSource = newSource;
	}
	public String getAnnotation() {
		return mAnnot;
	}
	public Term getSource() {
		return mSource;
	}
	@Override
	public String toString() {
		return mAnnot;
	}
	@Override
	public Term toTerm(Clause cls, Theory theory) {
		Term res = cls.toTerm(theory);
		if (mSource == null) {
			// Partial proof mode
			res = theory.term("@asserted", mAnnot.isEmpty() ? res
					: theory.annotatedTerm(new Annotation[] {
						new Annotation(":input", mAnnot)
					}, res));
		} else {
			// Full proof mode
			res = theory.term("@clause", mSource, res);
		}
		return res;
	}
}