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using System;
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using System.Collections.Generic;
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using System.Linq;
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using Unity.Injection;
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using Unity.Registration;
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namespace Implab.ServiceHost.Unity {
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public class TypeRegistrationContext : RegistrationContext {
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readonly TypeResolver m_resolver;
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readonly List<InjectionMember> m_injections = new List<InjectionMember>();
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public InjectionMember[] Injections { get { return m_injections.ToArray(); } }
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public Type ImplementationType {
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get;
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private set;
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}
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internal TypeRegistrationContext(TypeResolver resolver, Type registrationType, Type implementationType) : base(registrationType) {
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ImplementationType = implementationType;
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// when registering a generic mapping, register all generic parameter names as local types
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if (ImplementationType.IsGenericTypeDefinition) {
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m_resolver = new TypeResolver(resolver);
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foreach (var p in ImplementationType.GetGenericArguments())
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m_resolver.AddMapping(p.Name, p);
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} else {
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m_resolver = resolver;
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}
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}
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internal void Visit(ConstructorInjectionElement constructorInjection) {
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var valueContext = new InjectionValueContext(m_resolver, null);
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var parameters = constructorInjection.Parameters?.Select(x => x.Resolve(valueContext)).ToArray();
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var injection = parameters != null ? new InjectionConstructor(parameters) : new InjectionConstructor();
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m_injections.Add(injection);
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}
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internal void Visit(MethodInjectionElement methodInjection) {
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var valueContext = new InjectionValueContext(m_resolver, null);
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var parameters = methodInjection.Parameters?.Select(x => x.Resolve(valueContext)).ToArray();
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var injection = parameters != null ? new InjectionMethod(methodInjection.Name, parameters) : new InjectionMethod(methodInjection.Name);
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m_injections.Add(injection);
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}
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internal void Visit(PropertyInjectionElement propertyInjection) {
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if (propertyInjection.Value == null)
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throw new Exception($"A value value must be specified for the property '{propertyInjection.Name}'");
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var propertyType = RegistrationType.GetProperty(propertyInjection.Name)?.PropertyType;
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var valueContext = new InjectionValueContext(m_resolver, propertyType);
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var parameter = propertyInjection.Value.Resolve(valueContext);
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var injection = new InjectionProperty(propertyInjection.Name, parameter);
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m_injections.Add(injection);
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}
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}
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}
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