PropositionalTerm.java

/**
 * Author: Georg Hofferek <georg.hofferek@iaik.tugraz.at>
 */
package at.iaik.suraq.smtlib.formula;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;

import at.iaik.suraq.sexp.SExpression;
import at.iaik.suraq.sexp.SExpressionConstants;
import at.iaik.suraq.sexp.Token;
import at.iaik.suraq.smtlib.SMTLibObject;

/**
 * A propositional term. I.e., either a propositional constant or a
 * propositional variable, or a propositional if-then-else construct.
 * 
 * @author Georg Hofferek <georg.hofferek@iaik.tugraz.at>
 * 
 */
public abstract class PropositionalTerm extends Term implements Formula,
        Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = -8802037619823735053L;

    /**
     * @see at.iaik.suraq.smtlib.formula.Term#getType()
     */
    @Override
    public SExpression getType() {
        return SExpressionConstants.BOOL_TYPE;
    }

    /**
     * @see at.iaik.suraq.smtlib.formula.Formula#removeArrayEqualitiesTerm()
     */
    @Override
    public Formula removeArrayEqualities() {
        // Nothing to do here.
        // No array equalities contained here.
        return this;
    }

    /**
     * @see at.iaik.suraq.smtlib.formula.Formula#removeArrayEqualitiesTerm()
     */
    @Override
    public Term removeArrayEqualitiesTerm() {
        // Nothing to do here.
        // No array equalities contained here.
        return this;
    }

    /**
     * @see at.iaik.suraq.smtlib.formula.Formula#simplify()
     */
    @Override
    public Formula simplify() {
        // Nothing to do
        return this;
    }

    @Override
    public abstract PropositionalTerm flatten();

    /**
     * @see at.iaik.suraq.smtlib.formula.Term#uninterpretedPredicatesToAuxiliaryVariables(at.iaik.suraq.smtlib.formula.Formula,
     *      java.util.Set, java.util.Set)
     */
    /*
     * @Override public abstract PropositionalTerm
     * uninterpretedPredicatesToAuxiliaryVariables( Formula topLeveFormula,
     * Set<Formula> constraints, Set<Token> noDependenceVars);
     */

    /**
     * @see at.iaik.suraq.smtlib.formula.Term#removeDomainITE(at.iaik.suraq.smtlib.formula.Formula,
     *      java.util.Set, java.util.List)
     */
    @Override
    public abstract PropositionalTerm removeDomainITE(Formula topLevelFormula,
            Set<Token> noDependenceVars, List<Formula> andPreList);

    /**
     * @see at.iaik.suraq.smtlib.formula.Term#removeArrayITE(at.iaik.suraq.smtlib.formula.Formula,
     *      java.util.Set, java.util.Collection)
     */
    @Override
    public abstract PropositionalTerm removeArrayITE(Formula topLevelFormula,
            Set<Token> noDependenceVars, Collection<Formula> constraints);

    @Override
    public abstract PropositionalTerm substituteUninterpretedFunction(
            Map<Token, UninterpretedFunction> substitutions,
            Map<SMTLibObject, SMTLibObject> done);
}