Examples with AND com.sri.ai.grinder.library.FunctorConstants.AND used on opensource projects

Example 1 with AND

use of com.sri.ai.grinder.library.FunctorConstants.AND in project aic-expresso by aic-sri-international.

the class DefaultIntensionalBound method boundProduct.

public static DefaultIntensionalBound boundProduct(Theory theory, Context context, Bound... listOfBounds) {
    if (listOfBounds.length == 0) {
        DefaultIntensionalBound result = new DefaultIntensionalBound();
        return result;
    }
    Set<Expression> alreadyDefined = Util.set();
    alreadyDefined.addAll(context.getSymbols());
    Predicate<Expression> isAlreadyDefined = e -> alreadyDefined.contains(e);
    ArrayList<Expression> productIndexExpressionList = new ArrayList<>();
    Object[] productHeadArray = new Expression[listOfBounds.length];
    Object[] productConditionArray = new Expression[listOfBounds.length];
    int k = 0;
    for (Bound bound : Arrays.asList(listOfBounds)) {
        if (!bound.isIntensionalBound()) {
            return null;
        }
        DefaultIntensionalBound intensionalBound = (DefaultIntensionalBound) bound;
        ExtensionalIndexExpressionsSet indexExpressions = (ExtensionalIndexExpressionsSet) intensionalBound.getIndexExpressions();
        Expression Head = intensionalBound.getHead();
        Expression condition = intensionalBound.getCondition();
        ArrayList<Expression> newIndexExpressionsList = new ArrayList<>(indexExpressions.getList());
        for (int i = 0; i != newIndexExpressionsList.size(); i++) {
            Expression indexExpression = newIndexExpressionsList.get(i);
            Symbol index = (Symbol) indexExpression.get(0);
            Expression type = indexExpression.get(1);
            PairOf<Expression> newIndexAndNewExpressionInScope = Expressions.standardizeApart(index, isAlreadyDefined, Head);
            Expression newIndex = newIndexAndNewExpressionInScope.first;
            Head = newIndexAndNewExpressionInScope.second;
            // type should not contain the index
            Expression newIndexExpression = apply(IN, newIndex, type);
            context = context.extendWithSymbolsAndTypes(newIndex, type);
            newIndexExpressionsList.set(i, newIndexExpression);
            alreadyDefined.add(newIndex);
            for (int j = i + 1; j != newIndexExpressionsList.size(); j++) {
                Expression anotherIndexExpression = newIndexExpressionsList.get(j);
                Expression anotherIndex = anotherIndexExpression.get(0);
                Expression anotherType = anotherIndexExpression.get(1);
                Expression newAnotherType = anotherType.replaceSymbol(index, newIndex, context);
                // anotherIndex is a symbols and does not contain index
                Expression newAnotherIndexExpression = apply(IN, anotherIndex, newAnotherType);
                newIndexExpressionsList.set(j, newAnotherIndexExpression);
            }
        }
        productIndexExpressionList.addAll(newIndexExpressionsList);
        productHeadArray[k] = Head;
        productConditionArray[k] = condition;
        k++;
    }
    Expression productCondition = apply(AND, productConditionArray);
    productCondition = theory.evaluate(productCondition, context);
    Expression productHead = apply(TIMES, productHeadArray);
    productHead = theory.evaluate(productHead, context);
    DefaultIntensionalBound result = new DefaultIntensionalBound(productIndexExpressionList, productHead, productCondition);
    return result;
}