/WCFWebApi/src/Microsoft.ApplicationServer.Http/Microsoft/ApplicationServer/Query/ServiceQuery.cs

// <copyright>

//   Copyright (c) Microsoft Corporation.  All rights reserved.

// </copyright>



namespace Microsoft.ApplicationServer.Query

{

    using System;

    using System.Collections.Generic;

    using System.Globalization;

    using Microsoft.ApplicationServer.Http;



    /// <summary>

    /// Represents an <see cref="System.Linq.IQueryable"/>.

    /// </summary>

    internal class ServiceQuery

    {

        /// <summary>

        /// Gets or sets a list of query parts.

        /// </summary>

        public IEnumerable<ServiceQueryPart> QueryParts

        {

            get;

            set;

        }

    }



    /// <summary>

    /// Represents a single query operator to be applied to a query

    /// </summary>

    internal class ServiceQueryPart

    {

        private string _queryOperator;

        private string _expression;



        /// <summary>

        /// Public constructor

        /// </summary>

        public ServiceQueryPart()

        {

        }



        /// <summary>

        /// Public constructor

        /// </summary>

        /// <param name="queryOperator">The query operator</param>

        /// <param name="expression">The query expression</param>

        public ServiceQueryPart(string queryOperator, string expression)

        {

            if (queryOperator == null)

            {

                throw new ArgumentNullException("queryOperator");

            }

            if (expression == null)

            {

                throw new ArgumentNullException("expression");

            }



            if (queryOperator != "filter" && queryOperator != "orderby" &&

               queryOperator != "skip" && queryOperator != "top")

            {

                throw new ArgumentException(SR.InvalidQueryOperator(queryOperator), "queryOperator");

            }



            this._queryOperator = queryOperator;

            this._expression = expression;

        }



        /// <summary>

        /// Gets or sets the query operator. Must be one of the supported operators : "where", "orderby", "skip", or "take".

        /// </summary>

        public string QueryOperator

        {

            get

            {

                return this._queryOperator;

            }

            set

            {

                this._queryOperator = value;

            }

        }



        /// <summary>

        /// Gets or sets the query expression.

        /// </summary>

        public string Expression

        {

            get

            {

                return this._expression;

            }

            set

            {

                this._expression = value;

            }

        }



        /// <summary>

        /// Returns a string representation of this <see cref="ServiceQueryPart"/>

        /// </summary>

        /// <returns>The string representation of this <see cref="ServiceQueryPart"/></returns>

        public override string ToString()

        {

            return string.Format(System.Globalization.CultureInfo.InvariantCulture, "{0}={1}", this.QueryOperator, this.Expression);

        }

    }

}