Examples with Type com.google.api.expr.v1alpha1.Type used on opensource projects

Example 16 with Type

use of com.google.api.expr.v1alpha1.Type in project cel-java by projectnessie.

the class Checker method checkCreateList.

void checkCreateList(Expr.Builder e) {
    CreateList.Builder create = e.getListExprBuilder();
    Type elemType = null;
    for (int i = 0; i < create.getElementsBuilderList().size(); i++) {
        Expr.Builder el = create.getElementsBuilderList().get(i);
        check(el);
        elemType = joinTypes(location(el), elemType, getType(el));
    }
    if (elemType == null) {
        // If the list is empty, assign free type var to elem type.
        elemType = newTypeVar();
    }
    setType(e, Decls.newListType(elemType));
}

Example 17 with Type

use of com.google.api.expr.v1alpha1.Type in project cel-java by projectnessie.

the class Checker method setType.

void setType(Expr.Builder e, Type t) {
    Type old = types.get(e.getId());
    if (old != null && !old.equals(t)) {
        throw new IllegalStateException(String.format("(Incompatible) Type already exists for expression: %s(%d) old:%s, new:%s", e, e.getId(), old, t));
    }
    types.put(e.getId(), t);
}

Example 18 with Type

use of com.google.api.expr.v1alpha1.Type in project cel-java by projectnessie.

the class CheckerEnv method sanitizeFunction.

// sanitizeFunction replaces well-known types referenced by message name with their equivalent
// CEL built-in type instances.
Decl sanitizeFunction(Decl decl) {
    FunctionDecl fn = decl.getFunction();
    // Determine whether the declaration requires replacements from proto-based message type
    // references to well-known CEL type references.
    boolean needsSanitizing = false;
    for (Overload o : fn.getOverloadsList()) {
        if (isObjectWellKnownType(o.getResultType())) {
            needsSanitizing = true;
            break;
        }
        for (Type p : o.getParamsList()) {
            if (isObjectWellKnownType(p)) {
                needsSanitizing = true;
                break;
            }
        }
    }
    // Early return if the declaration requires no modification.
    if (!needsSanitizing) {
        return decl;
    }
    // Sanitize all of the overloads if any overload requires an update to its type references.
    List<Overload> overloads = new ArrayList<>(fn.getOverloadsCount());
    for (Overload o : fn.getOverloadsList()) {
        boolean sanitized = false;
        Type rt = o.getResultType();
        if (isObjectWellKnownType(rt)) {
            rt = getObjectWellKnownType(rt);
            sanitized = true;
        }
        List<Type> params = new ArrayList<>(o.getParamsCount());
        for (Type p : o.getParamsList()) {
            if (isObjectWellKnownType(p)) {
                params.add(getObjectWellKnownType(p));
                sanitized = true;
            } else {
                params.add(p);
            }
        }
        // If sanitized, replace the overload definition.
        Overload ov;
        if (sanitized) {
            if (o.getIsInstanceFunction()) {
                ov = Decls.newInstanceOverload(o.getOverloadId(), params, rt);
            } else {
                ov = Decls.newOverload(o.getOverloadId(), params, rt);
            }
        } else {
            // Otherwise, preserve the original overload.
            ov = o;
        }
        overloads.add(ov);
    }
    return Decls.newFunction(decl.getName(), overloads);
}

Example 19 with Type

use of com.google.api.expr.v1alpha1.Type in project cel-java by projectnessie.

the class CheckerEnv method addOverload.

/**
 * addOverload adds overload to function declaration f. Returns one or more errorMsg values if the
 * overload overlaps with an existing overload or macro.
 */
Decl addOverload(Decl f, Overload overload, List<String> errMsgs) {
    FunctionDecl function = f.getFunction();
    Mapping emptyMappings = newMapping();
    Type overloadFunction = Decls.newFunctionType(overload.getResultType(), overload.getParamsList());
    Type overloadErased = substitute(emptyMappings, overloadFunction, true);
    boolean hasErr = false;
    for (Overload existing : function.getOverloadsList()) {
        Type existingFunction = Decls.newFunctionType(existing.getResultType(), existing.getParamsList());
        Type existingErased = substitute(emptyMappings, existingFunction, true);
        boolean overlap = isAssignable(emptyMappings, overloadErased, existingErased) != null || isAssignable(emptyMappings, existingErased, overloadErased) != null;
        if (overlap && overload.getIsInstanceFunction() == existing.getIsInstanceFunction()) {
            errMsgs.add(overlappingOverloadError(f.getName(), overload.getOverloadId(), overloadFunction, existing.getOverloadId(), existingFunction));
            hasErr = true;
        }
    }
    for (Macro macro : Macro.AllMacros) {
        if (macro.function().equals(f.getName()) && macro.isReceiverStyle() == overload.getIsInstanceFunction() && macro.argCount() == overload.getParamsCount()) {
            errMsgs.add(overlappingMacroError(f.getName(), macro.argCount()));
            hasErr = true;
        }
    }
    if (hasErr) {
        return f;
    }
    function = function.toBuilder().addOverloads(overload).build();
    f = f.toBuilder().setFunction(function).build();
    return f;
}

Example 20 with Type

use of com.google.api.expr.v1alpha1.Type in project cel-java by projectnessie.

the class CheckerEnv method lookupIdent.

/**
 * LookupIdent returns a Decl proto for typeName as an identifier in the Env. Returns nil if no
 * such identifier is found in the Env.
 */
public Decl lookupIdent(String name) {
    for (String candidate : container.resolveCandidateNames(name)) {
        Decl ident = declarations.findIdent(candidate);
        if (ident != null) {
            return ident;
        }
        // Next try to import the name as a reference to a message type. If found,
        // the declaration is added to the outest (global) scope of the
        // environment, so next time we can access it faster.
        Type t = provider.findType(candidate);
        if (t != null) {
            Decl decl = Decls.newVar(candidate, t);
            declarations.addIdent(decl);
            return decl;
        }
        // Next try to import this as an enum value by splitting the name in a type prefix and
        // the enum inside.
        Val enumValue = provider.enumValue(candidate);
        if (enumValue.type() != ErrType) {
            Decl decl = Decls.newIdent(candidate, Decls.Int, Constant.newBuilder().setInt64Value(enumValue.intValue()).build());
            declarations.addIdent(decl);
            return decl;
        }
    }
    return null;
}