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1 using System;
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2 using System.ComponentModel;
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3 using System.Xml.Serialization;
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4 using Unity.Injection;
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5
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6 namespace Implab.ServiceHost.Unity {
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7
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8 public class InjectionValueBuilder {
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9
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10 readonly TypeResolver m_resolver;
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11
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12 public Type DefaultType { get; private set; }
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13
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14 public Type ValueType { get; set; }
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15
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16 public object Value { get; set; }
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17
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18 public InjectionParameterValue Injection {
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19 get {
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20 if (Value != null)
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21 return InjectionParameterValue.ToParameter(Value);
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22
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23 return new InjectionParameter(ValueType, null);
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24 }
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25 }
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26
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27 internal InjectionValueBuilder(TypeResolver resolver, Type acceptsType) {
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28 m_resolver = resolver;
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29 DefaultType = acceptsType;
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30 }
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31
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32 public Type ResolveType(string typeSpec) {
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33 if (string.IsNullOrEmpty(typeSpec)) {
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34 if (DefaultType == null)
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35 throw new Exception("The type must be specified");
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36 return DefaultType;
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37 }
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38 return m_resolver.Resolve(typeSpec);
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39 }
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40
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41 public void Visit(ITextValue value) {
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42 ValueType = ResolveType(value.TypeName);
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43
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44 Value = string.IsNullOrEmpty(value.Value) ?
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45 Safe.CreateDefaultValue(ValueType) :
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46 TypeDescriptor.GetConverter(ValueType).ConvertFromString(value.Value);
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47 }
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48
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49 public void Visit(ISerializedValue value) {
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50 ValueType = ResolveType(value.TypeName);
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51
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52 var serializer = new XmlSerializer(ValueType);
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53
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54 using (var reader = value.GetReader())
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55 Value = new InjectionParameter(ValueType, serializer.Deserialize(reader));
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56 }
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57
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58 public void Visit(IDependencyReference value) {
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59 ValueType = ResolveType(value.TypeName);
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60 Value = new ResolvedParameter(ValueType, value.DependencyName);
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61 }
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62
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63 }
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64 } |
