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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Description
{
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Runtime;
using System.Security;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Configuration;
using System.Xml;
public abstract partial class MetadataImporter
{
readonly KeyedByTypeCollection<IPolicyImportExtension> policyExtensions;
readonly Dictionary<XmlQualifiedName, ContractDescription> knownContracts = new Dictionary<XmlQualifiedName, ContractDescription>();
readonly Collection<MetadataConversionError> errors = new Collection<MetadataConversionError>();
readonly Dictionary<object, object> state = new Dictionary<object, object>();
//prevent inheritance until we are ready to allow it.
internal MetadataImporter()
: this (null, MetadataImporterQuotas.Defaults)
{
}
internal MetadataImporter(IEnumerable<IPolicyImportExtension> policyImportExtensions)
: this (policyImportExtensions, MetadataImporterQuotas.Defaults)
{
}
internal MetadataImporter(IEnumerable<IPolicyImportExtension> policyImportExtensions,
MetadataImporterQuotas quotas)
{
if (quotas == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("quotas");
}
if (policyImportExtensions == null)
{
policyImportExtensions = LoadPolicyExtensionsFromConfig();
}
this.Quotas = quotas;
this.policyExtensions = new KeyedByTypeCollection<IPolicyImportExtension>(policyImportExtensions);
}
public KeyedByTypeCollection<IPolicyImportExtension> PolicyImportExtensions
{
get { return this.policyExtensions; }
}
public Collection<MetadataConversionError> Errors
{
get { return this.errors; }
}
public Dictionary<object, object> State
{
get { return this.state; }
}
public Dictionary<XmlQualifiedName, ContractDescription> KnownContracts
{
get { return this.knownContracts; }
}
// Abstract Building Methods
public abstract Collection<ContractDescription> ImportAllContracts();
public abstract ServiceEndpointCollection ImportAllEndpoints();
internal virtual XmlElement ResolvePolicyReference(string policyReference, XmlElement contextAssertion)
{
return null;
}
internal BindingElementCollection ImportPolicy(ServiceEndpoint endpoint, Collection<Collection<XmlElement>> policyAlternatives)
{
foreach (Collection<XmlElement> 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 (Fx.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;
}
[Fx.Tag.SecurityNote(Critical = "uses ClientSection.UnsafeGetSection to get config in PT",
Safe = "does not leak config object, just picks up extensions")]
[SecuritySafeCritical]
static Collection<IPolicyImportExtension> LoadPolicyExtensionsFromConfig()
{
return 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<XmlElement> 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;
}
}
}
}
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