1 | using System.Collections.Generic;
|
---|
2 | using System;
|
---|
3 | using HeuristicLab.Persistence.Interfaces;
|
---|
4 | using HeuristicLab.Persistence.Core.Tokens;
|
---|
5 |
|
---|
6 | namespace HeuristicLab.Persistence.Core {
|
---|
7 |
|
---|
8 | public class Deserializer {
|
---|
9 |
|
---|
10 | class Midwife {
|
---|
11 |
|
---|
12 | public int? Id { get; private set; }
|
---|
13 | public bool MetaMode { get; set; }
|
---|
14 | public object Obj { get; private set; }
|
---|
15 |
|
---|
16 | private List<Tag> metaInfo;
|
---|
17 | private List<Tag> customValues;
|
---|
18 | private Type type;
|
---|
19 | private IDecomposer decomposer;
|
---|
20 |
|
---|
21 | public Midwife(object value) {
|
---|
22 | this.Obj = value;
|
---|
23 | }
|
---|
24 |
|
---|
25 | public Midwife(Type type, IDecomposer decomposer, int? id) {
|
---|
26 | this.type = type;
|
---|
27 | this.decomposer = decomposer;
|
---|
28 | this.Id = id;
|
---|
29 | MetaMode = false;
|
---|
30 | metaInfo = new List<Tag>();
|
---|
31 | customValues = new List<Tag>();
|
---|
32 | }
|
---|
33 |
|
---|
34 | public void CreateInstance() {
|
---|
35 | if (Obj != null)
|
---|
36 | throw new PersistenceException("object already instantiated");
|
---|
37 | Obj = decomposer.CreateInstance(type, metaInfo);
|
---|
38 | }
|
---|
39 |
|
---|
40 | public void AddValue(string name, object value) {
|
---|
41 | if (MetaMode) {
|
---|
42 | metaInfo.Add(new Tag(name, value));
|
---|
43 | } else {
|
---|
44 | customValues.Add(new Tag(name, value));
|
---|
45 | }
|
---|
46 | }
|
---|
47 |
|
---|
48 | public void Populate() {
|
---|
49 | decomposer.Populate(Obj, customValues, type);
|
---|
50 | }
|
---|
51 | }
|
---|
52 |
|
---|
53 | private readonly Dictionary<int, object> id2obj;
|
---|
54 | private readonly Dictionary<Type, object> serializerMapping;
|
---|
55 | private readonly Stack<Midwife> parentStack;
|
---|
56 | private readonly Dictionary<int, Type> typeIds;
|
---|
57 |
|
---|
58 | public Deserializer(
|
---|
59 | IEnumerable<TypeMapping> typeCache) {
|
---|
60 | id2obj = new Dictionary<int, object>();
|
---|
61 | parentStack = new Stack<Midwife>();
|
---|
62 | typeIds = new Dictionary<int, Type>();
|
---|
63 | serializerMapping = CreateSerializers(typeCache);
|
---|
64 | }
|
---|
65 |
|
---|
66 | private Dictionary<Type, object> CreateSerializers(IEnumerable<TypeMapping> typeCache) {
|
---|
67 | try {
|
---|
68 | var map = new Dictionary<Type, object>();
|
---|
69 | foreach (var typeMapping in typeCache) {
|
---|
70 | Type type = Type.GetType(typeMapping.TypeName, true);
|
---|
71 | typeIds.Add(typeMapping.Id, type);
|
---|
72 | Type serializerType = Type.GetType(typeMapping.Serializer, true);
|
---|
73 | map.Add(type, Activator.CreateInstance(serializerType, true));
|
---|
74 | }
|
---|
75 | return map;
|
---|
76 | } catch (Exception e) {
|
---|
77 | throw new PersistenceException(
|
---|
78 | "The serialization type cache could not be loaded.\r\n" +
|
---|
79 | "This usualy happens when you are missing an Assembly/Plugin.", e);
|
---|
80 | }
|
---|
81 | }
|
---|
82 |
|
---|
83 | public object Deserialize(IEnumerable<ISerializationToken> tokens) {
|
---|
84 | foreach (ISerializationToken token in tokens) {
|
---|
85 | Type t = token.GetType();
|
---|
86 | if (t == typeof(BeginToken)) {
|
---|
87 | CompositeStartHandler((BeginToken)token);
|
---|
88 | } else if (t == typeof(EndToken)) {
|
---|
89 | CompositeEndHandler((EndToken)token);
|
---|
90 | } else if (t == typeof(PrimitiveToken)) {
|
---|
91 | PrimitiveHandler((PrimitiveToken)token);
|
---|
92 | } else if (t == typeof(ReferenceToken)) {
|
---|
93 | ReferenceHandler((ReferenceToken)token);
|
---|
94 | } else if (t == typeof(NullReferenceToken)) {
|
---|
95 | NullHandler((NullReferenceToken)token);
|
---|
96 | } else if (t == typeof(MetaInfoBeginToken)) {
|
---|
97 | MetaInfoBegin((MetaInfoBeginToken)token);
|
---|
98 | } else if (t == typeof(MetaInfoEndToken)) {
|
---|
99 | MetaInfoEnd((MetaInfoEndToken)token);
|
---|
100 | } else {
|
---|
101 | throw new PersistenceException("invalid token type");
|
---|
102 | }
|
---|
103 | }
|
---|
104 | return parentStack.Pop().Obj;
|
---|
105 | }
|
---|
106 |
|
---|
107 | private void CompositeStartHandler(BeginToken token) {
|
---|
108 | Type type = typeIds[(int)token.TypeId];
|
---|
109 | IDecomposer decomposer = null;
|
---|
110 | if (serializerMapping.ContainsKey(type))
|
---|
111 | decomposer = serializerMapping[type] as IDecomposer;
|
---|
112 | if (decomposer == null)
|
---|
113 | throw new PersistenceException(String.Format(
|
---|
114 | "No suitable method for deserialization of type \"{0}\" found.",
|
---|
115 | type.VersionInvariantName()));
|
---|
116 | parentStack.Push(new Midwife(type, decomposer, token.Id));
|
---|
117 | }
|
---|
118 |
|
---|
119 | private void CompositeEndHandler(EndToken token) {
|
---|
120 | Type type = typeIds[(int)token.TypeId];
|
---|
121 | Midwife midwife = parentStack.Pop();
|
---|
122 | if (midwife.Obj == null)
|
---|
123 | CreateInstance(midwife);
|
---|
124 | midwife.Populate();
|
---|
125 | SetValue(token.Name, midwife.Obj);
|
---|
126 | }
|
---|
127 |
|
---|
128 | private void PrimitiveHandler(PrimitiveToken token) {
|
---|
129 | Type type = typeIds[(int)token.TypeId];
|
---|
130 | object value = ((IFormatter)serializerMapping[type]).Parse(token.SerialData);
|
---|
131 | if (token.Id != null)
|
---|
132 | id2obj[(int)token.Id] = value;
|
---|
133 | SetValue(token.Name, value);
|
---|
134 | }
|
---|
135 |
|
---|
136 | private void ReferenceHandler(ReferenceToken token) {
|
---|
137 | object referredObject = id2obj[token.Id];
|
---|
138 | SetValue(token.Name, referredObject);
|
---|
139 | }
|
---|
140 |
|
---|
141 | private void NullHandler(NullReferenceToken token) {
|
---|
142 | SetValue(token.Name, null);
|
---|
143 | }
|
---|
144 |
|
---|
145 | private void MetaInfoBegin(MetaInfoBeginToken token) {
|
---|
146 | parentStack.Peek().MetaMode = true;
|
---|
147 | }
|
---|
148 |
|
---|
149 | private void MetaInfoEnd(MetaInfoEndToken token) {
|
---|
150 | Midwife m = parentStack.Peek();
|
---|
151 | m.MetaMode = false;
|
---|
152 | CreateInstance(m);
|
---|
153 | }
|
---|
154 |
|
---|
155 | private void CreateInstance(Midwife m) {
|
---|
156 | m.CreateInstance();
|
---|
157 | if (m.Id != null)
|
---|
158 | id2obj.Add((int)m.Id, m.Obj);
|
---|
159 | }
|
---|
160 |
|
---|
161 | private void SetValue(string name, object value) {
|
---|
162 | if (parentStack.Count == 0) {
|
---|
163 | parentStack.Push(new Midwife(value));
|
---|
164 | } else {
|
---|
165 | Midwife m = parentStack.Peek();
|
---|
166 | if (m.MetaMode == false && m.Obj == null)
|
---|
167 | CreateInstance(m);
|
---|
168 | m.AddValue(name, value);
|
---|
169 | }
|
---|
170 | }
|
---|
171 | }
|
---|
172 | } |
---|