define(["require", "exports", "../constants/metadata_keys", "../planning/metadata"], function (require, exports, METADATA_KEY, metadata_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var traverseAncerstors = function (request, constraint) {
        var parent = request.parentRequest;
        if (parent !== null) {
            return constraint(parent) ? true : traverseAncerstors(parent, constraint);
        }
        else {
            return false;
        }
    };
    exports.traverseAncerstors = traverseAncerstors;
    var taggedConstraint = function (key) { return function (value) {
        var constraint = function (request) {
            return request !== null && request.target !== null && request.target.matchesTag(key)(value);
        };
        constraint.metaData = new metadata_1.Metadata(key, value);
        return constraint;
    }; };
    exports.taggedConstraint = taggedConstraint;
    var namedConstraint = taggedConstraint(METADATA_KEY.NAMED_TAG);
    exports.namedConstraint = namedConstraint;
    var typeConstraint = function (type) { return function (request) {
        var binding = null;
        if (request !== null) {
            binding = request.bindings[0];
            if (typeof type === "string") {
                var serviceIdentifier = binding.serviceIdentifier;
                return serviceIdentifier === type;
            }
            else {
                var constructor = request.bindings[0].implementationType;
                return type === constructor;
            }
        }
        return false;
    }; };
    exports.typeConstraint = typeConstraint;
});
