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CachedCatalog.cs
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CachedCatalog.cs
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// Copyright (c) Microsoft. All rights reserved.
namespace Microsoft.VisualStudio.Composition
{
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.VisualStudio.Composition.Reflection;
public class CachedCatalog
{
protected static readonly Encoding TextEncoding = Encoding.UTF8;
public Task SaveAsync(ComposableCatalog catalog, Stream cacheStream, CancellationToken cancellationToken = default(CancellationToken))
{
Requires.NotNull(catalog, nameof(catalog));
Requires.NotNull(cacheStream, nameof(cacheStream));
return Task.Run(() =>
{
using (var writer = new BinaryWriter(cacheStream, TextEncoding, leaveOpen: true))
{
using (var context = new SerializationContext(writer, catalog.Parts.Count * 4, catalog.Resolver))
{
context.Write(catalog);
context.FinalizeObjectTableCapacity();
}
}
});
}
public Task<ComposableCatalog> LoadAsync(Stream cacheStream, Resolver resolver, CancellationToken cancellationToken = default(CancellationToken))
{
Requires.NotNull(cacheStream, nameof(cacheStream));
Requires.NotNull(resolver, nameof(resolver));
return Task.Run(() =>
{
using (var reader = new BinaryReader(cacheStream, TextEncoding, leaveOpen: true))
{
using (var context = new SerializationContext(reader, resolver))
{
var catalog = context.ReadComposableCatalog();
return catalog;
}
}
});
}
private class SerializationContext : SerializationContextBase
{
internal SerializationContext(BinaryReader reader, Resolver resolver)
: base(reader, resolver)
{
}
internal SerializationContext(BinaryWriter writer, int estimatedObjectCount, Resolver resolver)
: base(writer, estimatedObjectCount, resolver)
{
}
private enum ConstraintTypes
{
ImportMetadataViewConstraint,
ExportTypeIdentityConstraint,
PartCreationPolicyConstraint,
ExportMetadataValueImportConstraint,
}
internal void Write(ComposableCatalog catalog)
{
using (this.Trace(nameof(ComposableCatalog)))
{
this.Write(catalog.Parts, this.Write);
}
}
internal ComposableCatalog ReadComposableCatalog()
{
using (this.Trace(nameof(ComposableCatalog)))
{
var parts = this.ReadList(this.ReadComposablePartDefinition);
return ComposableCatalog.Create(this.Resolver).AddParts(parts);
}
}
private void Write(ComposablePartDefinition partDefinition)
{
using (this.Trace(nameof(ComposablePartDefinition)))
{
this.Write(partDefinition.TypeRef);
this.Write(partDefinition.Metadata);
this.Write(partDefinition.ExportedTypes, this.Write);
this.WriteCompressedUInt((uint)partDefinition.ExportingMembers.Count);
foreach (var exportingMember in partDefinition.ExportingMembers)
{
this.Write(exportingMember.Key);
this.Write(exportingMember.Value, this.Write);
}
this.Write(partDefinition.ImportingMembers, this.Write);
this.Write(partDefinition.SharingBoundary);
this.Write(partDefinition.OnImportsSatisfiedRef);
if (partDefinition.ImportingConstructorOrFactoryRef == null)
{
this.writer.Write(false);
}
else
{
this.writer.Write(true);
this.Write(partDefinition.ImportingConstructorOrFactoryRef);
this.Write(partDefinition.ImportingConstructorImports, this.Write);
}
this.Write(partDefinition.CreationPolicy);
this.writer.Write(partDefinition.IsSharingBoundaryInferred);
}
}
private ComposablePartDefinition ReadComposablePartDefinition()
{
using (this.Trace(nameof(ComposablePartDefinition)))
{
var partType = this.ReadTypeRef();
var partMetadata = this.ReadMetadata();
var exportedTypes = this.ReadList(this.ReadExportDefinition);
var exportingMembers = ImmutableDictionary.CreateBuilder<MemberRef, IReadOnlyCollection<ExportDefinition>>();
uint exportedMembersCount = this.ReadCompressedUInt();
for (int i = 0; i < exportedMembersCount; i++)
{
var member = this.ReadMemberRef();
var exports = this.ReadList(this.ReadExportDefinition);
exportingMembers.Add(member, exports);
}
var importingMembers = this.ReadList(this.ReadImportDefinitionBinding);
var sharingBoundary = this.ReadString();
var onImportsSatisfied = this.ReadMethodRef();
MethodRef importingConstructor = default(MethodRef);
IReadOnlyList<ImportDefinitionBinding> importingConstructorImports = null;
if (this.reader.ReadBoolean())
{
importingConstructor = this.ReadMethodRef();
importingConstructorImports = this.ReadList(this.ReadImportDefinitionBinding);
}
var creationPolicy = this.ReadCreationPolicy();
var isSharingBoundaryInferred = this.reader.ReadBoolean();
var part = new ComposablePartDefinition(
partType,
partMetadata,
exportedTypes,
exportingMembers,
importingMembers,
sharingBoundary,
onImportsSatisfied,
importingConstructor,
importingConstructorImports,
creationPolicy,
isSharingBoundaryInferred);
return part;
}
}
private void Write(CreationPolicy creationPolicy)
{
using (this.Trace(nameof(CreationPolicy)))
{
this.writer.Write((byte)creationPolicy);
}
}
private CreationPolicy ReadCreationPolicy()
{
using (this.Trace(nameof(CreationPolicy)))
{
return (CreationPolicy)this.reader.ReadByte();
}
}
private void Write(ExportDefinition exportDefinition)
{
using (this.Trace(nameof(ExportDefinition)))
{
this.Write(exportDefinition.ContractName);
this.Write(exportDefinition.Metadata);
}
}
private ExportDefinition ReadExportDefinition()
{
using (this.Trace(nameof(ExportDefinition)))
{
var contractName = this.ReadString();
var metadata = this.ReadMetadata();
return new ExportDefinition(contractName, metadata);
}
}
private void Write(ImportDefinition importDefinition)
{
using (this.Trace(nameof(ImportDefinition)))
{
this.Write(importDefinition.ContractName);
this.Write(importDefinition.Cardinality);
this.Write(importDefinition.Metadata);
this.Write(importDefinition.ExportConstraints, this.Write);
this.Write(importDefinition.ExportFactorySharingBoundaries, this.Write);
}
}
private ImportDefinition ReadImportDefinition()
{
using (this.Trace(nameof(ImportDefinition)))
{
var contractName = this.ReadString();
var cardinality = this.ReadImportCardinality();
var metadata = this.ReadMetadata();
var constraints = this.ReadList(this.ReadIImportSatisfiabilityConstraint);
var sharingBoundaries = this.ReadList(this.ReadString);
return new ImportDefinition(contractName, cardinality, metadata, constraints, sharingBoundaries);
}
}
private void Write(ImportDefinitionBinding importDefinitionBinding)
{
using (this.Trace(nameof(ImportDefinitionBinding)))
{
this.Write(importDefinitionBinding.ImportDefinition);
this.Write(importDefinitionBinding.ComposablePartTypeRef);
this.Write(importDefinitionBinding.ImportingSiteTypeRef);
this.Write(importDefinitionBinding.ImportingSiteTypeWithoutCollectionRef);
if (importDefinitionBinding.ImportingMemberRef == null)
{
this.writer.Write(false);
this.Write(importDefinitionBinding.ImportingParameterRef);
}
else
{
this.writer.Write(true);
this.Write(importDefinitionBinding.ImportingMemberRef);
}
}
}
private ImportDefinitionBinding ReadImportDefinitionBinding()
{
using (this.Trace(nameof(ImportDefinitionBinding)))
{
var importDefinition = this.ReadImportDefinition();
var part = this.ReadTypeRef();
var importingSiteTypeRef = this.ReadTypeRef();
var importingSiteTypeWithoutCollectionRef = this.ReadTypeRef();
MemberRef member;
ParameterRef parameter;
bool isMember = this.reader.ReadBoolean();
if (isMember)
{
member = this.ReadMemberRef();
return new ImportDefinitionBinding(importDefinition, part, member, importingSiteTypeRef, importingSiteTypeWithoutCollectionRef);
}
else
{
parameter = this.ReadParameterRef();
return new ImportDefinitionBinding(importDefinition, part, parameter, importingSiteTypeRef, importingSiteTypeWithoutCollectionRef);
}
}
}
private void Write(IImportSatisfiabilityConstraint importConstraint)
{
using (this.Trace(nameof(IImportSatisfiabilityConstraint)))
{
ConstraintTypes type;
if (importConstraint is ImportMetadataViewConstraint)
{
type = ConstraintTypes.ImportMetadataViewConstraint;
}
else if (importConstraint is ExportTypeIdentityConstraint)
{
type = ConstraintTypes.ExportTypeIdentityConstraint;
}
else if (importConstraint is PartCreationPolicyConstraint)
{
type = ConstraintTypes.PartCreationPolicyConstraint;
}
else if (importConstraint is ExportMetadataValueImportConstraint)
{
type = ConstraintTypes.ExportMetadataValueImportConstraint;
}
else
{
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, Strings.ImportConstraintTypeNotSupported, importConstraint.GetType().FullName));
}
this.writer.Write((byte)type);
switch (type)
{
case ConstraintTypes.ImportMetadataViewConstraint:
var importMetadataViewConstraint = (ImportMetadataViewConstraint)importConstraint;
this.WriteCompressedUInt((uint)importMetadataViewConstraint.Requirements.Count);
foreach (var item in importMetadataViewConstraint.Requirements)
{
this.Write(item.Key);
this.Write(item.Value.MetadatumValueTypeRef);
this.writer.Write(item.Value.IsMetadataumValueRequired);
}
break;
case ConstraintTypes.ExportTypeIdentityConstraint:
var exportTypeIdentityConstraint = (ExportTypeIdentityConstraint)importConstraint;
this.Write(exportTypeIdentityConstraint.TypeIdentityName);
break;
case ConstraintTypes.PartCreationPolicyConstraint:
var partCreationPolicyConstraint = (PartCreationPolicyConstraint)importConstraint;
this.Write(partCreationPolicyConstraint.RequiredCreationPolicy);
break;
case ConstraintTypes.ExportMetadataValueImportConstraint:
var exportMetadataValueImportConstraint = (ExportMetadataValueImportConstraint)importConstraint;
this.Write(exportMetadataValueImportConstraint.Name);
this.WriteObject(exportMetadataValueImportConstraint.Value);
break;
default:
throw Assumes.NotReachable();
}
}
}
private IImportSatisfiabilityConstraint ReadIImportSatisfiabilityConstraint()
{
using (this.Trace(nameof(IImportSatisfiabilityConstraint)))
{
var type = (ConstraintTypes)this.reader.ReadByte();
switch (type)
{
case ConstraintTypes.ImportMetadataViewConstraint:
uint count = this.ReadCompressedUInt();
var requirements = ImmutableDictionary.CreateBuilder<string, ImportMetadataViewConstraint.MetadatumRequirement>();
for (int i = 0; i < count; i++)
{
var name = this.ReadString();
var valueTypeRef = this.ReadTypeRef();
var isRequired = this.reader.ReadBoolean();
requirements.Add(name, new ImportMetadataViewConstraint.MetadatumRequirement(valueTypeRef, isRequired));
}
return new ImportMetadataViewConstraint(requirements.ToImmutable(), this.Resolver);
case ConstraintTypes.ExportTypeIdentityConstraint:
string exportTypeIdentity = this.ReadString();
return new ExportTypeIdentityConstraint(exportTypeIdentity);
case ConstraintTypes.PartCreationPolicyConstraint:
CreationPolicy creationPolicy = this.ReadCreationPolicy();
return PartCreationPolicyConstraint.GetRequiredCreationPolicyConstraint(creationPolicy);
case ConstraintTypes.ExportMetadataValueImportConstraint:
{
string name = this.ReadString();
object value = this.ReadObject();
return new ExportMetadataValueImportConstraint(name, value);
}
default:
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, Strings.UnexpectedConstraintType, type));
}
}
}
}
}
}