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Example 1 with DefaultIntensionalMultiSet

use of com.sri.ai.expresso.core.DefaultIntensionalMultiSet in project aic-expresso by aic-sri-international.

the class Expressions method makeDefaultIntensionalMultiSetFromLabelAndSubTrees.

private static Expression makeDefaultIntensionalMultiSetFromLabelAndSubTrees(Object label, Object[] subTreeObjects) {
    if (subTreeObjects.length == 1 && subTreeObjects[0] instanceof Collection) {
        subTreeObjects = ((Collection) subTreeObjects[0]).toArray();
    }
    ArrayList<Expression> subTreeExpressions = Util.mapIntoArrayList(subTreeObjects, Expressions::makeFromObject);
    if (subTreeExpressions.size() == 1) {
        subTreeExpressions = new ArrayList<Expression>(Expressions.ensureListFromKleeneList(subTreeExpressions.get(0)));
    }
    Expression scopingExpression = subTreeExpressions.get(0);
    IndexExpressionsSet indexExpressions = new ExtensionalIndexExpressionsSet((scopingExpression == null || scopingExpression.numberOfArguments() == 0) ? Util.list() : new ArrayList<Expression>(Expressions.ensureListFromKleeneList(scopingExpression.get(0))));
    Expression conditioningSyntaxTree = subTreeExpressions.get(2);
    Expression condition = conditioningSyntaxTree == null ? Expressions.TRUE : conditioningSyntaxTree.get(0);
    Expression result = new DefaultIntensionalMultiSet(indexExpressions, subTreeExpressions.get(1), condition);
    return result;
}
Also used : ExtensionalIndexExpressionsSet(com.sri.ai.expresso.core.ExtensionalIndexExpressionsSet) DefaultLambdaExpression(com.sri.ai.expresso.core.DefaultLambdaExpression) Expression(com.sri.ai.expresso.api.Expression) LambdaExpression(com.sri.ai.expresso.api.LambdaExpression) ArrayList(java.util.ArrayList) Collection(java.util.Collection) IndexExpressions(com.sri.ai.grinder.sgdpllt.library.indexexpression.IndexExpressions) ExtensionalIndexExpressionsSet(com.sri.ai.expresso.core.ExtensionalIndexExpressionsSet) IndexExpressionsSet(com.sri.ai.expresso.api.IndexExpressionsSet) DefaultIntensionalMultiSet(com.sri.ai.expresso.core.DefaultIntensionalMultiSet)

Example 2 with DefaultIntensionalMultiSet

use of com.sri.ai.expresso.core.DefaultIntensionalMultiSet in project aic-expresso by aic-sri-international.

the class AbstractFunctionBasedGroup method makeProblemExpression.

@Override
public Expression makeProblemExpression(Expression index, Expression indexType, Expression constraint, Expression body) {
    Expression indexExpression = makeIndexExpression(index, indexType);
    IndexExpressionsSet indexExpressionsSet = new ExtensionalIndexExpressionsSet(indexExpression);
    DefaultIntensionalMultiSet set = new DefaultIntensionalMultiSet(indexExpressionsSet, body, constraint);
    Expression problem = apply(getFunctionString(), set);
    return problem;
}
Also used : ExtensionalIndexExpressionsSet(com.sri.ai.expresso.core.ExtensionalIndexExpressionsSet) IndexExpressions.makeIndexExpression(com.sri.ai.grinder.sgdpllt.library.indexexpression.IndexExpressions.makeIndexExpression) Expression(com.sri.ai.expresso.api.Expression) ExtensionalIndexExpressionsSet(com.sri.ai.expresso.core.ExtensionalIndexExpressionsSet) IndexExpressionsSet(com.sri.ai.expresso.api.IndexExpressionsSet) DefaultIntensionalMultiSet(com.sri.ai.expresso.core.DefaultIntensionalMultiSet)

Example 3 with DefaultIntensionalMultiSet

use of com.sri.ai.expresso.core.DefaultIntensionalMultiSet in project aic-expresso by aic-sri-international.

the class GrinderUtil method getTypeExpression.

/**
	 * Returns the type of given expression according to registry.
	 */
public static Expression getTypeExpression(Expression expression, Registry registry) {
    Expression result;
    if (FormulaUtil.isApplicationOfBooleanConnective(expression)) {
        result = makeSymbol("Boolean");
    } else if (expression.getSyntacticFormType().equals(FunctionApplication.SYNTACTIC_FORM_TYPE) && list(SUM, PRODUCT, MAX).contains(expression.getFunctor().toString())) {
        Expression argument = expression.get(0);
        if (argument.getSyntacticFormType().equals(IntensionalSet.SYNTACTIC_FORM_TYPE)) {
            IntensionalSet intensionalSetArgument = (IntensionalSet) argument;
            Expression head = intensionalSetArgument.getHead();
            // NOTE: Need to extend the registry as the index expressions in the quantifier may
            // declare new types (i.e. function types).
            Registry headRegistry = registry.extendWith(intensionalSetArgument.getIndexExpressions());
            result = getTypeExpression(head, headRegistry);
        } else if (argument.getSyntacticFormType().equals(ExtensionalSets.SYNTACTIC_FORM_TYPE)) {
            List<Expression> arguments = ((AbstractExtensionalSet) argument).getElementsDefinitions();
            result = getTypeOfCollectionOfNumericExpressionsWithDefaultInteger(arguments, registry);
        } else if (expression.hasFunctor(MAX)) {
            // MAX can also be applied to a bunch of numbers
            result = getTypeOfCollectionOfNumericExpressionsWithDefaultInteger(expression.getArguments(), registry);
        } else {
            throw new Error(expression.getFunctor() + " defined for sets only but got " + expression.get(0));
        }
    } else if (Equality.isEquality(expression) || Disequality.isDisequality(expression)) {
        result = makeSymbol("Boolean");
    } else if (expression.equals(FunctorConstants.REAL_INTERVAL_CLOSED_CLOSED) || expression.equals(FunctorConstants.REAL_INTERVAL_CLOSED_OPEN) || expression.equals(FunctorConstants.REAL_INTERVAL_OPEN_CLOSED) || expression.equals(FunctorConstants.REAL_INTERVAL_OPEN_OPEN)) {
        result = FunctionType.make(parse("Set"), parse("Number"), parse("Number"));
    } else if (IfThenElse.isIfThenElse(expression)) {
        Expression thenType = getTypeExpression(IfThenElse.thenBranch(expression), registry);
        Expression elseType = getTypeExpression(IfThenElse.elseBranch(expression), registry);
        if (thenType != null && elseType != null && (thenType.equals("Number") && isIntegerOrReal(elseType) || isIntegerOrReal(thenType) && elseType.equals("Number"))) {
            result = makeSymbol("Number");
        } else if (thenType != null && elseType != null && (thenType.equals("Integer") && elseType.equals("Real") || thenType.equals("Real") && elseType.equals("Integer"))) {
            result = makeSymbol("Real");
        } else if (thenType != null && (elseType == null || thenType.equals(elseType))) {
            result = thenType;
        } else if (elseType != null && (thenType == null || elseType.equals(thenType))) {
            result = elseType;
        } else if (thenType == null) {
            throw new Error("Could not determine the types of then and else branches of '" + expression + "'.");
        } else if (thenType.equals("Integer") && elseType.hasFunctor(INTEGER_INTERVAL)) {
            // TODO: I know, I know, this treatment of integers and interval is terrible... will fix at some point
            result = thenType;
        } else if (thenType.hasFunctor(INTEGER_INTERVAL) && elseType.equals("Integer")) {
            result = elseType;
        } else if (thenType.hasFunctor(INTEGER_INTERVAL) && elseType.hasFunctor(INTEGER_INTERVAL)) {
            IntegerInterval thenInterval = (IntegerInterval) thenType;
            IntegerInterval elseInterval = (IntegerInterval) elseType;
            Expression minimumLowerBound = LessThan.simplify(apply(LESS_THAN, thenInterval.getNonStrictLowerBound(), elseInterval.getNonStrictLowerBound()), registry).booleanValue() ? thenInterval.getNonStrictLowerBound() : elseInterval.getNonStrictLowerBound();
            Expression maximumUpperBound = GreaterThan.simplify(apply(GREATER_THAN, thenInterval.getNonStrictUpperBound(), elseInterval.getNonStrictUpperBound()), registry).booleanValue() ? thenInterval.getNonStrictUpperBound() : elseInterval.getNonStrictUpperBound();
            if (minimumLowerBound.equals(MINUS_INFINITY) && maximumUpperBound.equals(INFINITY)) {
                result = makeSymbol("Integer");
            } else {
                result = apply(INTEGER_INTERVAL, minimumLowerBound, maximumUpperBound);
            }
        } else {
            throw new Error("'" + expression + "' then and else branches have different types (" + thenType + " and " + elseType + " respectively).");
        }
    } else if (isCardinalityExpression(expression)) {
        result = makeSymbol("Integer");
    } else if (isNumericFunctionApplication(expression)) {
        List<Expression> argumentTypes = mapIntoList(expression.getArguments(), e -> getTypeExpression(e, registry));
        int firstNullArgumentTypeIndexIfAny = Util.getIndexOfFirstSatisfyingPredicateOrMinusOne(argumentTypes, t -> t == null);
        if (firstNullArgumentTypeIndexIfAny != -1) {
            throw new Error("Cannot determine type of " + expression.getArguments().get(firstNullArgumentTypeIndexIfAny) + ", which is needed for determining type of " + expression);
        }
        /**
			 * commonDomain is the co-domain shared by all argument function types, or empty tuple for arguments that are not function-typed.
			 * Therefore, if no argument is function-typed, it will be equal to the empty tuple.
			 */
        Expression commonDomain = getCommonDomainIncludingConversionOfNonFunctionTypesToNullaryFunctions(argumentTypes, registry);
        if (commonDomain == null) {
            throw new Error("Operator " + expression.getFunctor() + " applied to arguments of non-compatible types: " + expression + ", types of arguments are " + argumentTypes);
        }
        boolean noArgumentIsFunctionTyped = commonDomain.equals(EMPTY_TUPLE) && !thereExists(argumentTypes, t -> t.hasFunctor(FunctorConstants.FUNCTION_TYPE));
        Expression resultCoDomain;
        if (thereExists(argumentTypes, t -> Util.equals(getCoDomainOrItself(t), "Number"))) {
            resultCoDomain = makeSymbol("Number");
        } else if (thereExists(argumentTypes, t -> Util.equals(getCoDomainOrItself(t), "Real"))) {
            resultCoDomain = makeSymbol("Real");
        } else if (thereExists(argumentTypes, t -> isRealInterval(getCoDomainOrItself(t)))) {
            resultCoDomain = makeSymbol("Real");
        } else {
            resultCoDomain = makeSymbol("Integer");
        }
        if (noArgumentIsFunctionTyped) {
            result = resultCoDomain;
        } else {
            result = apply(FUNCTION_TYPE, commonDomain, resultCoDomain);
        }
    } else if (expression.hasFunctor(FunctorConstants.INTEGER_INTERVAL) || expression.hasFunctor(FunctorConstants.REAL_INTERVAL_CLOSED_CLOSED) || expression.hasFunctor(FunctorConstants.REAL_INTERVAL_OPEN_CLOSED) || expression.hasFunctor(FunctorConstants.REAL_INTERVAL_CLOSED_OPEN) || expression.hasFunctor(FunctorConstants.REAL_INTERVAL_OPEN_OPEN)) {
        result = makeSymbol("Set");
    } else if (isComparisonFunctionApplication(expression)) {
        result = makeSymbol("Boolean");
    } else if (expression.hasFunctor(FunctorConstants.FUNCTION_TYPE)) {
        // very vague type for now
        result = apply(FUNCTION_TYPE, makeSymbol("Set"), makeSymbol("Set"));
    } else if (Sets.isIntensionalMultiSet(expression)) {
        IntensionalSet set = (IntensionalSet) expression;
        // NOTE: Need to extend the registry as the index expressions in the quantifier may
        // declare new types (i.e. function types).
        Registry headRegistry = registry.extendWith(set.getIndexExpressions());
        Expression headType = getTypeExpression(set.getHead(), headRegistry);
        result = new DefaultIntensionalMultiSet(list(), headType, TRUE);
    } else if (Sets.isExtensionalSet(expression)) {
        // very vague type for now
        result = apply(FUNCTION_TYPE, makeSymbol("Set"));
    } else if (expression.hasFunctor(FunctorConstants.INTERSECTION) || expression.hasFunctor(FunctorConstants.UNION) || expression.hasFunctor(FunctorConstants.INTENSIONAL_UNION)) {
        // very vague type for now
        result = apply(FUNCTION_TYPE, makeSymbol("Set"));
    } else if (expression.getSyntacticFormType().equals(Symbol.SYNTACTIC_FORM_TYPE)) {
        if (expression.getValue() instanceof Integer) {
            result = makeSymbol("Integer");
        } else if (expression.getValue() instanceof Double) {
            result = makeSymbol("Real");
        } else if (expression.getValue() instanceof Rational) {
            Rational rational = (Rational) expression.getValue();
            boolean isInteger = rational.isInteger();
            result = makeSymbol(isInteger ? "Integer" : "Real");
        } else if (expression.getValue() instanceof Number) {
            result = makeSymbol("Number");
        } else if (expression.getValue() instanceof String && expression.isStringLiteral()) {
            result = makeSymbol("String");
        } else if (expression.getValue() instanceof Boolean) {
            result = makeSymbol("Boolean");
        } else if (expression.equals(Expressions.INFINITY) || expression.equals(Expressions.MINUS_INFINITY)) {
            result = makeSymbol("Number");
        } else {
            result = registry.getTypeOfRegisteredSymbol(expression);
            if (result == null) {
                Type type = getFirstSatisfyingPredicateOrNull(registry.getTypes(), t -> t.contains(expression));
                if (type != null) {
                    result = parse(type.getName());
                }
            }
        }
    } else if (expression.hasFunctor(FunctorConstants.GET) && expression.numberOfArguments() == 2 && Expressions.isNumber(expression.get(1))) {
        Expression argType = getTypeExpression(expression.get(0), registry);
        if (TupleType.isTupleType(argType)) {
            TupleType tupleType = (TupleType) GrinderUtil.fromTypeExpressionToItsIntrinsicMeaning(argType, registry);
            result = parse(tupleType.getElementTypes().get(expression.get(1).intValue() - 1).toString());
        } else {
            throw new Error("get type from tuple for '" + expression + "' currently not supported.");
        }
    } else if (expression.hasFunctor(FunctorConstants.TUPLE_TYPE)) {
        // Is a type expression already.
        result = expression;
    } else if (expression.getSyntacticFormType().equals(FunctionApplication.SYNTACTIC_FORM_TYPE)) {
        Expression functionType = getTypeExpression(expression.getFunctor(), registry);
        if (functionType == null) {
            throw new Error("Type of '" + expression.getFunctor() + "' required, but unknown to registry.");
        }
        Expression coDomain = FunctionType.getCodomain(functionType);
        List<Expression> argumentsTypesList = FunctionType.getArgumentList(functionType);
        if (expression.getArguments().size() != argumentsTypesList.size()) {
            throw new Error("Function " + expression.getFunctor() + " is of type " + functionType + " but has incorrect number of arguments = " + expression.getArguments());
        }
        for (int idx = 0; idx < expression.getArguments().size(); idx++) {
            Expression arg = expression.get(idx);
            Expression argExprType = argumentsTypesList.get(idx);
            Type argType = registry.getType(argExprType);
            if (!isSubtypeOf(arg, argType, registry)) {
                throw new Error("Function " + expression.getFunctor() + " is of type " + functionType + " but has arguments that are not legal subtypes [#" + idx + "] = " + expression.getArguments());
            }
        }
        result = coDomain;
    } else if (Tuple.isTuple(expression)) {
        List<Expression> elementTypes = expression.getArguments().stream().map(element -> getTypeExpression(element, registry)).collect(Collectors.toList());
        result = TupleType.make(elementTypes);
    } else if (expression instanceof QuantifiedExpressionWithABody) {
        QuantifiedExpressionWithABody quantifiedExpressionWithABody = (QuantifiedExpressionWithABody) expression;
        // NOTE: Need to extend the registry as the index expressions in the quantifier may
        // declare new types (i.e. function types).
        Registry quantifiedExpressionWithABodyRegistry = registry.extendWith(quantifiedExpressionWithABody.getIndexExpressions());
        result = getTypeExpression(quantifiedExpressionWithABody.getBody(), quantifiedExpressionWithABodyRegistry);
    } else if (expression instanceof LambdaExpression) {
        LambdaExpression lambdaExpression = (LambdaExpression) expression;
        Collection<Expression> domain = IndexExpressions.getIndexDomainsOfQuantifiedExpression(lambdaExpression);
        IndexExpressionsSet indexExpressions = lambdaExpression.getIndexExpressions();
        Registry lambdaExpressionWithABodyRegistry = registry.extendWith(indexExpressions);
        Expression coDomain = getTypeExpression(lambdaExpression.getBody(), lambdaExpressionWithABodyRegistry);
        result = Expressions.apply(FUNCTION_TYPE, domain, coDomain);
    } else if (expression instanceof AbstractExpressionWrapper) {
        Expression innerExpression = ((AbstractExpressionWrapper) expression).getInnerExpression();
        result = getTypeExpression(innerExpression, registry);
    } else {
        throw new Error("GrinderUtil.getType does not yet know how to determine the type of this sort of expression: " + expression);
    }
    return result;
}
Also used : SUM(com.sri.ai.grinder.sgdpllt.library.FunctorConstants.SUM) CountingFormula(com.sri.ai.expresso.api.CountingFormula) LESS_THAN_OR_EQUAL_TO(com.sri.ai.grinder.sgdpllt.library.FunctorConstants.LESS_THAN_OR_EQUAL_TO) FALSE(com.sri.ai.expresso.helper.Expressions.FALSE) Expressions(com.sri.ai.expresso.helper.Expressions) Rational(com.sri.ai.util.math.Rational) Expression(com.sri.ai.expresso.api.Expression) Util.getFirstSatisfyingPredicateOrNull(com.sri.ai.util.Util.getFirstSatisfyingPredicateOrNull) GreaterThan(com.sri.ai.grinder.sgdpllt.library.number.GreaterThan) ExtensionalIndexExpressionsSet(com.sri.ai.expresso.core.ExtensionalIndexExpressionsSet) Symbol(com.sri.ai.expresso.api.Symbol) Map(java.util.Map) Util.thereExists(com.sri.ai.util.Util.thereExists) Sets(com.sri.ai.grinder.sgdpllt.library.set.Sets) Function(com.google.common.base.Function) DefaultIntensionalMultiSet(com.sri.ai.expresso.core.DefaultIntensionalMultiSet) 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Aggregations

Expression (com.sri.ai.expresso.api.Expression)3 IndexExpressionsSet (com.sri.ai.expresso.api.IndexExpressionsSet)3 DefaultIntensionalMultiSet (com.sri.ai.expresso.core.DefaultIntensionalMultiSet)3 ExtensionalIndexExpressionsSet (com.sri.ai.expresso.core.ExtensionalIndexExpressionsSet)3 LambdaExpression (com.sri.ai.expresso.api.LambdaExpression)2 Beta (com.google.common.annotations.Beta)1 Function (com.google.common.base.Function)1 Predicate (com.google.common.base.Predicate)1 CountingFormula (com.sri.ai.expresso.api.CountingFormula)1 FunctionApplication (com.sri.ai.expresso.api.FunctionApplication)1 IntensionalSet (com.sri.ai.expresso.api.IntensionalSet)1 QuantifiedExpressionWithABody (com.sri.ai.expresso.api.QuantifiedExpressionWithABody)1 Symbol (com.sri.ai.expresso.api.Symbol)1 Tuple (com.sri.ai.expresso.api.Tuple)1 EMPTY_TUPLE (com.sri.ai.expresso.api.Tuple.EMPTY_TUPLE)1 Type (com.sri.ai.expresso.api.Type)1 AbstractExtensionalSet (com.sri.ai.expresso.core.AbstractExtensionalSet)1 DefaultLambdaExpression (com.sri.ai.expresso.core.DefaultLambdaExpression)1 DefaultUniversallyQuantifiedFormula (com.sri.ai.expresso.core.DefaultUniversallyQuantifiedFormula)1 AbstractExpressionWrapper (com.sri.ai.expresso.helper.AbstractExpressionWrapper)1