MetadataImporter.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Description / MetadataImporter.cs / 2 / MetadataImporter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.ServiceModel.Description 
{
    using System.Xml; 
    using System.ServiceModel.Channels; 
    using System.ServiceModel;
    using System.Xml.Schema; 
    using System.Collections.Generic;
    using System.Collections.ObjectModel;
    using Config = System.ServiceModel.Configuration;
    using WsdlNS = System.Web.Services.Description; 
    using System.Security;
 
 
    public abstract partial class MetadataImporter
    { 
        //prevent inheritance until we are ready to allow it.

        internal MetadataImporter()
            : this (null, MetadataImporterQuotas.Defaults) 
        {
        } 
 
        internal MetadataImporter(IEnumerable policyImportExtensions)
            : this (policyImportExtensions, MetadataImporterQuotas.Defaults) 
        {
        }

        internal MetadataImporter(IEnumerable policyImportExtensions, 
            MetadataImporterQuotas quotas)
        { 
            if (quotas == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("quotas"); 
            }

            if (policyImportExtensions == null)
            { 
                policyImportExtensions = LoadPolicyExtensionsFromConfig();
            } 
 
            this.Quotas = quotas;
            this.policyExtensions = new KeyedByTypeCollection(policyImportExtensions); 
        }

        readonly KeyedByTypeCollection policyExtensions;
        readonly Dictionary knownContracts  = new Dictionary(); 
        readonly Collection errors = new Collection();
        readonly Dictionary state = new Dictionary(); 
 
        public KeyedByTypeCollection PolicyImportExtensions { get { return policyExtensions; } }
 
        public Collection Errors { get { return errors; } }  // errors
        public Dictionary State { get { return state; } }        // state

        public Dictionary KnownContracts { get { return knownContracts; } } 

        // Abstract Building Methods 
        public abstract Collection ImportAllContracts(); 
        public abstract ServiceEndpointCollection ImportAllEndpoints();
 
        //
        // Consider [....]: maybe these methods should be public?
        internal virtual XmlElement ResolvePolicyReference(string policyReference, XmlElement contextAssertion)
        { 
            return null;
        } 
        internal BindingElementCollection ImportPolicy(ServiceEndpoint endpoint, Collection> policyAlternatives) 
        {
            foreach (Collection selectedPolicy in policyAlternatives) 
            {
                BindingOnlyPolicyConversionContext policyConversionContext = new BindingOnlyPolicyConversionContext(endpoint, selectedPolicy);

                if (TryImportPolicy(policyConversionContext)) 
                {
                    return policyConversionContext.BindingElements; 
                } 
            }
            return null; 
        }

        internal bool TryImportPolicy(PolicyConversionContext policyContext)
        { 
            foreach (IPolicyImportExtension policyImporter in policyExtensions)
                try 
                { 
                    policyImporter.ImportPolicy(this, policyContext);
                } 
#pragma warning suppress 56500 // covered by FxCOP
                catch (Exception e)
                {
                    if (DiagnosticUtility.IsFatal(e)) 
                        throw;
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateExtensionException(policyImporter, e)); 
                } 

            if (policyContext.GetBindingAssertions().Count != 0) 
                return false;

            foreach (OperationDescription operation in policyContext.Contract.Operations)
            { 
                if (policyContext.GetOperationBindingAssertions(operation).Count != 0)
                    return false; 
 
                foreach (MessageDescription message in operation.Messages)
                    if (policyContext.GetMessageBindingAssertions(message).Count != 0) 
                        return false;
            }

            return true; 
        }
 
        ///  
        ///  Critical - uses ClientSection.UnsafeGetSection to get config in PT
        ///  Safe - does not leak config object, just picks up extensions 
        /// 
        [SecurityCritical, SecurityTreatAsSafe]
        static Collection LoadPolicyExtensionsFromConfig()
        { 
            return Config.ClientSection.UnsafeGetSection().Metadata.LoadPolicyImportExtensions();
        } 
 
        Exception CreateExtensionException(IPolicyImportExtension importer, Exception e)
        { 
            string errorMessage = SR.GetString(SR.PolicyExtensionImportError, importer.GetType(), e.Message);
            return new InvalidOperationException(errorMessage, e);
        }
 
        internal class BindingOnlyPolicyConversionContext : PolicyConversionContext
        { 
            static readonly PolicyAssertionCollection noPolicy = new PolicyAssertionCollection(); 
            readonly BindingElementCollection bindingElements = new BindingElementCollection();
            readonly PolicyAssertionCollection bindingPolicy; 

            internal BindingOnlyPolicyConversionContext(ServiceEndpoint endpoint, IEnumerable bindingPolicy)
                : base(endpoint)
            { 
                this.bindingPolicy = new PolicyAssertionCollection(bindingPolicy);
            } 
 
            public override BindingElementCollection BindingElements { get { return this.bindingElements; } }
 
            public override PolicyAssertionCollection GetBindingAssertions()
            {
                return this.bindingPolicy;
            } 

            public override PolicyAssertionCollection GetOperationBindingAssertions(OperationDescription operation) 
            { 
                return noPolicy;
            } 

            public override PolicyAssertionCollection GetMessageBindingAssertions(MessageDescription message)
            {
                return noPolicy; 
            }
 
            public override PolicyAssertionCollection GetFaultBindingAssertions(FaultDescription fault) 
            {
                return noPolicy; 
            }

        }
 
    }
 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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MetadataImporter.cs source code in C# .NET

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