MetadataResolver.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Description / MetadataResolver.cs / 1 / MetadataResolver.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.ServiceModel.Description
{ 
    using System.Collections.Generic;
    using System.ServiceModel; 
    using System.Collections.ObjectModel; 
    using System.Collections.Specialized;
    using System.Xml; 
    using XsdNS = System.Xml.Schema;
    using WsdlNS = System.Web.Services.Description;
    using System.ServiceModel.Configuration;
    using System.ServiceModel.Diagnostics; 
    using System.Collections;
    using System.Diagnostics; 
    using System.Net; 
    using System.Web;
    using System.Security.Cryptography.X509Certificates; 
    using System.ServiceModel.Channels;
    using System.ComponentModel;

    public static class MetadataResolver 
    {
        public static ServiceEndpointCollection Resolve(Type contract, EndpointAddress address) 
        { 
            if (contract == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contract");
            }

            return Resolve(CreateContractCollection(contract), address); 
        }
        public static ServiceEndpointCollection Resolve(IEnumerable contracts, EndpointAddress address) 
        { 
            return Resolve(contracts, address, new MetadataExchangeClient(address));
        } 
        public static ServiceEndpointCollection Resolve(IEnumerable contracts, EndpointAddress address, MetadataExchangeClient client)
        {
            if (address == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("address");
            } 
            if (client == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("client"); 
            }
            if (contracts == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contracts"); 
            }
            ValidateContracts(contracts); 
 

            MetadataSet metadataSet = client.GetMetadata(address); 
            return ImportEndpoints(metadataSet, contracts, client);
        }

        public static ServiceEndpointCollection Resolve(Type contract, Uri address, MetadataExchangeClientMode mode) 
        {
            if (contract == null) 
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contract");
            } 

            return Resolve(CreateContractCollection(contract), address, mode);
        }
        public static ServiceEndpointCollection Resolve(IEnumerable contracts, Uri address, MetadataExchangeClientMode mode) 
        {
            return Resolve(contracts, address, mode, new MetadataExchangeClient(address, mode)); 
        } 
        public static ServiceEndpointCollection Resolve(IEnumerable contracts, Uri address, MetadataExchangeClientMode mode, MetadataExchangeClient client)
        { 
            if (address == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("address");
            } 
            MetadataExchangeClientModeHelper.Validate(mode);
            if (client == null) 
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("client");
            } 
            if (contracts == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contracts");
            } 
            ValidateContracts(contracts);
 
            MetadataSet metadataSet = client.GetMetadata(address, mode); 
            return ImportEndpoints(metadataSet, contracts, client);
        } 

        public static IAsyncResult BeginResolve(Type contract, EndpointAddress address, AsyncCallback callback, object asyncState)
        {
            if (contract == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contract"); 
            } 

            return BeginResolve(CreateContractCollection(contract), address, callback, asyncState); 
        }
        public static IAsyncResult BeginResolve(IEnumerable contracts, EndpointAddress address, AsyncCallback callback, object asyncState)
        {
            return BeginResolve(contracts, address, new MetadataExchangeClient(address), callback, asyncState); 
        }
        public static IAsyncResult BeginResolve(IEnumerable contracts, EndpointAddress address, MetadataExchangeClient client, AsyncCallback callback, object asyncState) 
        { 
            if (address == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("address");
            }
            if (client == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("client");
            } 
            if (contracts == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contracts"); 
            }
            ValidateContracts(contracts);

            return new AsyncMetadataResolverHelper(address, MetadataExchangeClientMode.MetadataExchange, client, contracts, callback, asyncState); 
        }
 
        public static IAsyncResult BeginResolve(Type contract, Uri address, MetadataExchangeClientMode mode, AsyncCallback callback, object asyncState) 
        {
            if (contract == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contract");
            }
 
            return BeginResolve(CreateContractCollection(contract), address, mode, callback, asyncState);
        } 
        public static IAsyncResult BeginResolve(IEnumerable contracts, Uri address, MetadataExchangeClientMode mode, AsyncCallback callback, object asyncState) 
        {
            return BeginResolve(contracts, address, mode, new MetadataExchangeClient(address, mode), callback, asyncState); 
        }
        public static IAsyncResult BeginResolve(IEnumerable contracts, Uri address, MetadataExchangeClientMode mode, MetadataExchangeClient client,
                                                 AsyncCallback callback, object asyncState)
        { 
            if (address == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("address"); 
            }
            MetadataExchangeClientModeHelper.Validate(mode); 
            if (client == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("client");
            } 
            if (contracts == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("contracts"); 
            }
            ValidateContracts(contracts); 

            return new AsyncMetadataResolverHelper(new EndpointAddress(address), mode, client, contracts, callback, asyncState);
        }
 
        public static ServiceEndpointCollection EndResolve(IAsyncResult result)
        { 
            return AsyncMetadataResolverHelper.EndAsyncCall(result); 
        }
 
        class AsyncMetadataResolverHelper : AsyncResult
        {
            MetadataExchangeClient client;
            EndpointAddress address; 
            ServiceEndpointCollection endpointCollection;
            MetadataExchangeClientMode mode; 
            IEnumerable knownContracts; 

            internal AsyncMetadataResolverHelper(EndpointAddress address, MetadataExchangeClientMode mode, MetadataExchangeClient client, IEnumerable knownContracts, AsyncCallback callback, object asyncState) 
                : base(callback, asyncState)
            {
                this.address = address;
                this.client = client; 
                this.mode = mode;
                this.knownContracts = knownContracts; 
 
                GetMetadataSetAsync();
            } 

            internal void GetMetadataSetAsync()
            {
                IAsyncResult result; 

                if (this.mode == MetadataExchangeClientMode.HttpGet) 
                { 
                    result = this.client.BeginGetMetadata(this.address.Uri, MetadataExchangeClientMode.HttpGet, DiagnosticUtility.ThunkAsyncCallback(new AsyncCallback(this.EndGetMetadataSet)), null);
                } 
                else
                {
                    result = this.client.BeginGetMetadata(this.address, DiagnosticUtility.ThunkAsyncCallback(new AsyncCallback(this.EndGetMetadataSet)), null);
                } 

                if (result.CompletedSynchronously) 
                { 
                    HandleResult(result);
                    this.Complete(true); 
                }
            }

            internal void EndGetMetadataSet(IAsyncResult result) 
            {
                if (result.CompletedSynchronously) 
                    return; 

                Exception exception = null; 
                try
                {
                    HandleResult(result);
 
                }
                catch (Exception e) 
                { 
                    if (DiagnosticUtility.IsFatal(e))
                        throw; 
                    exception = e;
                }
                this.Complete(false, exception);
 
            }
 
            private void HandleResult(IAsyncResult result) 
            {
                MetadataSet metadataSet = this.client.EndGetMetadata(result); 
                endpointCollection = ImportEndpoints(metadataSet, knownContracts, this.client);
            }

            internal static ServiceEndpointCollection EndAsyncCall(IAsyncResult result) 
            {
                AsyncMetadataResolverHelper helper = AsyncResult.End(result); 
                return helper.endpointCollection; 
            }
        } 

        private static ServiceEndpointCollection ImportEndpoints(MetadataSet metadataSet, IEnumerable contracts, MetadataExchangeClient client)
        {
            ServiceEndpointCollection endpoints = new ServiceEndpointCollection(); 

            WsdlImporter importer = new WsdlImporter(metadataSet); 
 
            // remember the original proxy so user doesn't need to set it again
            importer.State.Add(MetadataExchangeClient.MetadataExchangeClientKey, client); 

            foreach (ContractDescription cd in contracts)
            {
                importer.KnownContracts.Add(WsdlExporter.WsdlNamingHelper.GetPortTypeQName(cd), cd); 
            }
 
            foreach(ContractDescription cd in contracts) 
            {
                ServiceEndpointCollection contractEndpoints; 
                contractEndpoints = importer.ImportEndpoints(cd);
                foreach (ServiceEndpoint se in contractEndpoints)
                {
                    endpoints.Add(se); 
                }
            } 
 
            //Trace all warnings and errors
            if (importer.Errors.Count > 0) 
            {
                TraceWsdlImportErrors(importer);
            }
 
            return endpoints;
        } 
 
        static void TraceWsdlImportErrors(WsdlImporter importer)
        { 
            foreach (MetadataConversionError error in importer.Errors)
            {
                if (DiagnosticUtility.ShouldTraceWarning)
                { 
                    Hashtable h = new Hashtable(2);
                    h.Add("IsWarning", error.IsWarning); 
                    h.Add("Message", error.Message); 
                    TraceUtility.TraceEvent(TraceEventType.Warning,
                                        TraceCode.WsmexNonCriticalWsdlExportError, 
                                        new DictionaryTraceRecord(h), null, null);
                }
            }
        } 

        private static void ValidateContracts(IEnumerable contracts) 
        { 
            bool isEmpty = true;
            Collection qnames = new Collection(); 
            foreach (ContractDescription cd in contracts)
            {
                isEmpty = false;
                if (cd == null) 
                {
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SR.GetString(SR.SFxMetadataResolverKnownContractsCannotContainNull)); 
                } 

                XmlQualifiedName qname = WsdlExporter.WsdlNamingHelper.GetPortTypeQName(cd); 
                if (qnames.Contains(qname))
                {
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SR.GetString(SR.SFxMetadataResolverKnownContractsUniqueQNames, qname.Name, qname.Namespace));
                } 

                qnames.Add(qname); 
            } 

            if (isEmpty) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SR.GetString(SR.SFxMetadataResolverKnownContractsArgumentCannotBeEmpty));
            }
        } 

        private static Collection CreateContractCollection(Type contract) 
        { 
            Collection contracts = new Collection();
            contracts.Add(ContractDescription.GetContract(contract)); 
            return contracts;
        }
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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