ServiceOperation.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWeb / Server / System / Data / Services / Providers / ServiceOperation.cs / 1305376 / ServiceOperation.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//  
//      Provides a type to represent custom operations on services.
//  
// 
// @owner  [....]
//--------------------------------------------------------------------- 

namespace System.Data.Services.Providers
{
    using System; 
    using System.Collections.Generic;
    using System.Collections.ObjectModel; 
    using System.Diagnostics; 

    /// Use this class to represent a custom service operation. 
    [DebuggerVisualizer("ServiceOperation={Name}")]
    public class ServiceOperation
    {
        /// Protocol (for example HTTP) method the service operation responds to. 
        private readonly string method;
 
        /// In-order parameters for this operation. 
        private readonly ReadOnlyCollection parameters;
 
        /// Kind of result expected from this operation.
        private readonly ServiceOperationResultKind resultKind;

        /// Type of element of the method result. 
        private readonly ResourceType resultType;
 
        /// Empty parameter collection. 
        private static ReadOnlyCollection emptyParameterCollection = new ReadOnlyCollection(new ServiceOperationParameter[0]);
 
        /// MIME type specified on primitive results, possibly null.
        private string mimeType;

        /// Entity set from which entities are read, if applicable. 
        private ResourceSet resourceSet;
 
        /// name of the service operation. 
        private string name;
 
        /// Is true, if the service operation is set to readonly i.e. fully initialized and validated. No more changes can be made,
        /// after the service operation is set to readonly.
        private bool isReadOnly;
 
        /// 
        /// Initializes a new  instance. 
        ///  
        /// name of the service operation.
        /// Kind of result expected from this operation. 
        /// Type of element of the method result.
        /// EntitySet of the result expected from this operation.
        /// Protocol (for example HTTP) method the service operation responds to.
        /// In-order parameters for this operation. 
        public ServiceOperation(
            string name, 
            ServiceOperationResultKind resultKind, 
            ResourceType resultType,
            ResourceSet resultSet, 
            string method,
            IEnumerable parameters)
        {
            WebUtil.CheckStringArgumentNull(name, "name"); 
            WebUtil.CheckServiceOperationResultKind(resultKind, "resultKind");
            WebUtil.CheckStringArgumentNull(method, "method"); 
 
            if ((resultKind == ServiceOperationResultKind.Void && resultType != null) ||
                (resultKind != ServiceOperationResultKind.Void && resultType == null)) 
            {
                throw new ArgumentException(Strings.ServiceOperation_ResultTypeAndKindMustMatch("resultKind", "resultType", ServiceOperationResultKind.Void));
            }
 
            if ((resultType == null || resultType.ResourceTypeKind != ResourceTypeKind.EntityType) && resultSet != null)
            { 
                throw new ArgumentException(Strings.ServiceOperation_ResultSetMustBeNull("resultSet", "resultType")); 
            }
 
            if (resultType != null && resultType.ResourceTypeKind == ResourceTypeKind.EntityType && (resultSet == null || !resultSet.ResourceType.IsAssignableFrom(resultType)))
            {
                throw new ArgumentException(Strings.ServiceOperation_ResultTypeAndResultSetMustMatch("resultType", "resultSet"));
            } 

            if (method != XmlConstants.HttpMethodGet && method != XmlConstants.HttpMethodPost) 
            { 
                throw new ArgumentException(Strings.ServiceOperation_NotSupportedProtocolMethod(method, name));
            } 

            this.name = name;
            this.resultKind = resultKind;
            this.resultType = resultType; 
            this.resourceSet = resultSet;
            this.method = method; 
            if (parameters == null) 
            {
                this.parameters = ServiceOperation.emptyParameterCollection; 
            }
            else
            {
                this.parameters = new ReadOnlyCollection(new List(parameters)); 
                HashSet paramNames = new HashSet(StringComparer.Ordinal);
                foreach (ServiceOperationParameter p in this.parameters) 
                { 
                    if (!paramNames.Add(p.Name))
                    { 
                        throw new ArgumentException(Strings.ServiceOperation_DuplicateParameterName(p.Name), "parameters");
                    }
                }
            } 
        }
 
        /// Protocol (for example HTTP) method the service operation responds to. 
        public string Method
        { 
            get { return this.method; }
        }

        /// MIME type specified on primitive results, possibly null. 
        public string MimeType
        { 
            get 
            {
                return this.mimeType; 
            }

            set
            { 
                this.ThrowIfSealed();
                if (String.IsNullOrEmpty(value)) 
                { 
                    throw new InvalidOperationException(Strings.ServiceOperation_MimeTypeCannotBeEmpty(this.Name));
                } 

                if (!WebUtil.IsValidMimeType(value))
                {
                    throw new InvalidOperationException(Strings.ServiceOperation_MimeTypeNotValid(value, this.Name)); 
                }
 
                this.mimeType = value; 
            }
        } 

        /// Name of the service operation.
        public string Name
        { 
            get { return this.name; }
        } 
 
        /// Returns all the parameters for the given service operations./// 
        public ReadOnlyCollection Parameters 
        {
            get { return this.parameters; }
        }
 
        /// Kind of result expected from this operation.
        public ServiceOperationResultKind ResultKind 
        { 
            get { return this.resultKind; }
        } 

        /// Element of result type.
        /// 
        /// Note that if the method returns an IEnumerable<string>, 
        /// this property will be typeof(string).
        ///  
        public ResourceType ResultType 
        {
            get { return this.resultType; } 
        }

        /// 
        /// PlaceHolder to hold custom state information about service operation. 
        /// 
        public object CustomState 
        { 
            get;
            set; 
        }

        /// 
        /// Returns true, if this service operation has been set to read only. Otherwise returns false. 
        /// 
        public bool IsReadOnly 
        { 
            get { return this.isReadOnly; }
        } 

        /// Entity set from which entities are read (possibly null).
        public ResourceSet ResourceSet
        { 
            get { return this.resourceSet; }
        } 
 
        /// 
        /// Set this service operation to readonly. 
        /// 
        public void SetReadOnly()
        {
            if (this.isReadOnly) 
            {
                return; 
            } 

            foreach (ServiceOperationParameter parameter in this.Parameters) 
            {
                parameter.SetReadOnly();
            }
 
            this.isReadOnly = true;
        } 
 
        /// 
        /// Throws an InvalidOperationException if this service operation is already set to readonly. 
        /// 
        internal void ThrowIfSealed()
        {
            if (this.isReadOnly) 
            {
                throw new InvalidOperationException(Strings.ServiceOperation_Sealed(this.Name)); 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ServiceOperation.cs source code in C# .NET

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