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using System;
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using System.Reflection;
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using Unity;
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namespace Implab.ServiceHost.Unity {
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public class ContainerBuilder {
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readonly TypeResolver m_resolver;
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readonly IUnityContainer m_container;
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readonly ContainerConfigurationSchema m_schema;
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public IUnityContainer Container {
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get {
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return m_container;
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}
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}
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public ContainerBuilder() : this(null, null) {
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}
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public ContainerBuilder(IUnityContainer container, ContainerConfigurationSchema schema) {
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m_container = container ?? new UnityContainer();
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m_resolver = new TypeResolver();
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m_schema = schema ?? ContainerConfigurationSchema.Default;
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}
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public Type ResolveType(string typeReference) {
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return string.IsNullOrEmpty(typeReference) ? null : m_resolver.Resolve(typeReference, true);
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}
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public void Visit(ITypeRegistration registration) {
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Safe.ArgumentNotNull(registration, nameof(registration));
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var registrationType = registration.GetRegistrationType(this);
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var implementationType = registration.GetImplementationType(this) ?? registrationType;
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if (registrationType == null)
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throw new Exception($"A type must be specified for the registration {registration.Name}");
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var builder = new TypeRegistrationBuilder(
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m_resolver,
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registrationType,
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implementationType
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);
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builder.Lifetime = registration.GetLifetime(this);
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if (registration.MemberInjections != null) {
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foreach(var member in registration.MemberInjections)
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member.Visit(builder);
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}
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m_container.RegisterType(
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builder.RegistrationType,
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builder.ImplementationType,
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registration.Name,
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builder.Lifetime,
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builder.Injections
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);
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}
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public void Visit(IInstanceRegistration registration) {
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Safe.ArgumentNotNull(registration, nameof(registration));
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var registrationType = registration.GetRegistrationType(this);
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var builder = new InstanceRegistrationBuilder (
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m_resolver,
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registrationType
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);
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builder.Lifetime = registration.GetLifetime(this);
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if (registration.MemberInjections != null) {
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foreach(var member in registration.MemberInjections)
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member.Visit(builder.ValueBuilder);
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}
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if (builder.RegistrationType == null && builder.ValueBuilder.ValueType == null)
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throw new Exception($"A type must be specified for the registration {registration.Name}");
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m_container.RegisterInstance(
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builder.RegistrationType ?? builder.ValueBuilder.ValueType,
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registration.Name,
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builder.ValueBuilder.Value,
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builder.Lifetime
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);
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}
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public void AddNamespace(string ns) {
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m_resolver.AddNamespace(ns);
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}
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public void AddAssembly(string assembly) {
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}
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public void Include(string file) {
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var includeContext = new ContainerBuilder(m_container, m_schema);
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includeContext.LoadConfig(file);
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}
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public void LoadConfig(string file) {
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var config = m_schema.LoadFile(file);
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config.Visit(this);
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}
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}
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}
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