Goal.java

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package com.microsoft.z3;

import com.microsoft.z3.enumerations.Z3_goal_prec;

public class Goal extends Z3Object
{
    public Z3_goal_prec getPrecision()
    {
        return Z3_goal_prec.fromInt(Native.goalPrecision(getContext().nCtx(),
                getNativeObject()));
    }

    public boolean isPrecise()
    {
        return getPrecision() == Z3_goal_prec.Z3_GOAL_PRECISE;
    }

    public boolean isUnderApproximation()
    {
        return getPrecision() == Z3_goal_prec.Z3_GOAL_UNDER;
    }

    public boolean isOverApproximation()
    {
        return getPrecision() == Z3_goal_prec.Z3_GOAL_OVER;
    }

    public boolean isGarbage()
    {
        return getPrecision() == Z3_goal_prec.Z3_GOAL_UNDER_OVER;
    }

    public void add(BoolExpr ... constraints)
    {
        getContext().checkContextMatch(constraints);
        for (BoolExpr c : constraints)
        {
            Native.goalAssert(getContext().nCtx(), getNativeObject(),
                    c.getNativeObject());
        }
    }

    public boolean inconsistent()
    {
        return Native.goalInconsistent(getContext().nCtx(), getNativeObject());
    }

    public int getDepth()
    {
        return Native.goalDepth(getContext().nCtx(), getNativeObject());
    }

    public void reset()
    {
        Native.goalReset(getContext().nCtx(), getNativeObject());
    }

    public int size()
    {
        return Native.goalSize(getContext().nCtx(), getNativeObject());
    }

    public BoolExpr[] getFormulas()
    {
        int n = size();
        BoolExpr[] res = new BoolExpr[n];
        for (int i = 0; i < n; i++)
            res[i] = new BoolExpr(getContext(), Native.goalFormula(getContext()
                    .nCtx(), getNativeObject(), i));
        return res;
    }

    public int getNumExprs()
    {
        return Native.goalNumExprs(getContext().nCtx(), getNativeObject());
    }

    public boolean isDecidedSat()
    {
        return Native.goalIsDecidedSat(getContext().nCtx(), getNativeObject());
    }

    public boolean isDecidedUnsat()
    {
        return Native
                .goalIsDecidedUnsat(getContext().nCtx(), getNativeObject());
    }

    public Goal translate(Context ctx)
    {
        return new Goal(ctx, Native.goalTranslate(getContext().nCtx(),
                getNativeObject(), ctx.nCtx()));
    }

    public Goal simplify()
    {
        Tactic t = getContext().mkTactic("simplify");
        ApplyResult res = t.apply(this);

        if (res.getNumSubgoals() == 0)
            throw new Z3Exception("No subgoals");
        else
            return res.getSubgoals()[0];
    }
    
    public Goal simplify(Params p)
    {
        Tactic t = getContext().mkTactic("simplify");
        ApplyResult res = t.apply(this, p);

        if (res.getNumSubgoals() == 0)
            throw new Z3Exception("No subgoals");
        else
            return res.getSubgoals()[0];
    }

    public String toString()
    {
        try
        {
            return Native.goalToString(getContext().nCtx(), getNativeObject());
        } catch (Z3Exception e)
        {
            return "Z3Exception: " + e.getMessage();
        }
    }
    
    public BoolExpr AsBoolExpr() {
        int n = size();
        if (n == 0) 
            return getContext().mkTrue();
        else if (n == 1)                
            return getFormulas()[0];
        else {
            return getContext().mkAnd(getFormulas());
        }
    }

    Goal(Context ctx, long obj)
    {
        super(ctx, obj);
    }

    Goal(Context ctx, boolean models, boolean unsatCores, boolean proofs)
           
    {
        super(ctx, Native.mkGoal(ctx.nCtx(), (models) ? true : false,
                (unsatCores) ? true : false, (proofs) ? true : false));
    }

    void incRef(long o)
    {
        getContext().getGoalDRQ().incAndClear(getContext(), o);
        super.incRef(o);
    }

    void decRef(long o)
    {
        getContext().getGoalDRQ().add(o);
        super.decRef(o);
    }

}