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using System;
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using System.ComponentModel;
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using System.Xml.Serialization;
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using Unity.Injection;
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namespace Implab.ServiceHost.Unity {
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public class InjectionValueBuilder {
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readonly TypeResolver m_resolver;
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public Type DefaultType { get; private set; }
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public Type ValueType { get; set; }
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public object Value { get; set; }
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public InjectionParameterValue Injection {
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get {
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if (Value != null)
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return InjectionParameterValue.ToParameter(Value);
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return new InjectionParameter(ValueType, null);
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}
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}
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internal InjectionValueBuilder(TypeResolver resolver, Type acceptsType) {
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m_resolver = resolver;
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DefaultType = acceptsType;
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}
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public Type ResolveType(string typeSpec) {
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if (string.IsNullOrEmpty(typeSpec)) {
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if (DefaultType == null)
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throw new Exception("The type must be specified");
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return DefaultType;
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}
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return m_resolver.Resolve(typeSpec);
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}
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public void Visit(ITextValue value) {
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ValueType = ResolveType(value.TypeName);
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Value = string.IsNullOrEmpty(value.Value) ?
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Safe.CreateDefaultValue(ValueType) :
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TypeDescriptor.GetConverter(ValueType).ConvertFromString(value.Value);
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}
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public void Visit(ISerializedValue value) {
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ValueType = ResolveType(value.TypeName);
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var serializer = new XmlSerializer(ValueType);
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using (var reader = value.GetReader())
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Value = new InjectionParameter(ValueType, serializer.Deserialize(reader));
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}
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public void Visit(IDependencyReference value) {
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ValueType = ResolveType(value.TypeName);
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Value = new ResolvedParameter(ValueType, value.DependencyName);
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}
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}
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}
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