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source: trunk/sources/HeuristicLab.Persistence/3.3/Core/ConfigurationService.cs @ 1542

Last change on this file since 1542 was 1542, checked in by epitzer, 15 years ago

Numerous small changes, coding conventions, renames, mini refactoring (#548)

File size: 5.3 KB
Line 
1using System;
2using System.IO;
3using System.Collections.Generic;
4using System.Reflection;
5using System.Text;
6using HeuristicLab.Persistence.Default.Xml;
7using HeuristicLab.Persistence.Interfaces;
8using HeuristicLab.Tracing;
9using HeuristicLab.Persistence.Interfaces.Tokens;
10
11namespace HeuristicLab.Persistence.Core {
12 
13  public class ConfigurationService {
14
15    private static ConfigurationService instance;
16    private readonly Dictionary<IFormat, Configuration> customConfigurations;
17    public Dictionary<IFormat, List<IFormatter>> Formatters { get; private set; }
18    public List<IDecomposer> Decomposers { get; private set; }
19   
20    public static ConfigurationService Instance {
21      get {
22        if (instance == null)
23          instance = new ConfigurationService();
24        return instance;
25      }
26    }
27
28    private ConfigurationService() {
29      Formatters = new Dictionary<IFormat, List<IFormatter>>();
30      Decomposers = new List<IDecomposer>();
31      customConfigurations = new Dictionary<IFormat, Configuration>();     
32      Reset();
33      LoadSettings();
34    }
35
36    public void LoadSettings() {
37      try {
38        if (String.IsNullOrEmpty(Properties.Settings.Default.CustomConfigurations) ||
39          String.IsNullOrEmpty(Properties.Settings.Default.CustomConfigurationsTypeCache))
40          return;
41        Deserializer deSerializer = new Deserializer(
42          XmlParser.ParseTypeCache(
43          new StringReader(
44            Properties.Settings.Default.CustomConfigurationsTypeCache)));
45        XmlParser parser = new XmlParser(
46          new StringReader(
47            Properties.Settings.Default.CustomConfigurations));
48        var newCustomConfigurations = (Dictionary<IFormat, Configuration>)
49          deSerializer.Deserialize(parser);
50        foreach (var config in newCustomConfigurations) {
51          customConfigurations[config.Key] = config.Value;
52        }
53      } catch (Exception e) {
54        Logger.Warn("Could not load settings.", e);       
55      }
56    }
57
58    public void SaveSettings() {     
59      Serializer serializer = new Serializer(
60        customConfigurations,
61        GetDefaultConfig(XmlFormat.Instance),
62        "CustomConfigurations");
63      XmlGenerator generator = new XmlGenerator();
64      StringBuilder configurationString = new StringBuilder();
65      foreach (ISerializationToken token in serializer) {
66        configurationString.Append(generator.Format(token));
67      }
68      StringBuilder configurationTypeCacheString = new StringBuilder();
69      foreach (string s in generator.Format(serializer.TypeCache))
70        configurationTypeCacheString.Append(s);
71      Properties.Settings.Default.CustomConfigurations =
72        configurationString.ToString();
73      Properties.Settings.Default.CustomConfigurationsTypeCache =
74        configurationTypeCacheString.ToString();
75      Properties.Settings.Default.Save();
76    }
77
78    public void Reset() {     
79      customConfigurations.Clear();
80      Formatters.Clear();
81      Decomposers.Clear();
82      Assembly defaultAssembly = Assembly.GetExecutingAssembly();
83      DiscoverFrom(defaultAssembly);
84      foreach (Assembly a in AppDomain.CurrentDomain.GetAssemblies())
85        if ( a != defaultAssembly )
86          DiscoverFrom(a);
87      SortDecomposers();
88    }
89
90    class PriortiySorter : IComparer<IDecomposer> {
91      public int Compare(IDecomposer x, IDecomposer y) {
92        return y.Priority - x.Priority;
93      }
94    }
95
96    protected void SortDecomposers() {
97      Decomposers.Sort(new PriortiySorter());
98    }
99
100    protected void DiscoverFrom(Assembly a) {
101      foreach (Type t in a.GetTypes()) {
102        if (t.GetInterface(typeof (IFormatter).FullName) != null) {
103          try {
104            IFormatter formatter = (IFormatter) Activator.CreateInstance(t, true);
105            if ( ! Formatters.ContainsKey(formatter.Format) ) {
106              Formatters.Add(formatter.Format, new List<IFormatter>());
107            }
108            Formatters[formatter.Format].Add(formatter);
109          } catch (MissingMethodException e) {
110            Logger.Warn("Could not instantiate " + t.VersionInvariantName(), e);           
111          }         
112        }
113        if (t.GetInterface(typeof (IDecomposer).FullName) != null) {
114          try {
115            Decomposers.Add((IDecomposer) Activator.CreateInstance(t, true));
116          } catch (MissingMethodException e) {
117            Logger.Warn("Could not instantiate " + t.VersionInvariantName(), e);           
118          }
119        }
120      }
121    }
122
123    public Configuration GetDefaultConfig(IFormat format) {
124      Dictionary<Type, IFormatter> formatterConfig = new Dictionary<Type, IFormatter>();
125      foreach ( IFormatter f in Formatters[format] ) {
126        if ( ! formatterConfig.ContainsKey(f.Type) )
127          formatterConfig.Add(f.Type, f);
128      }
129      return new Configuration(formatterConfig, Decomposers);
130    }
131
132    public Configuration GetConfiguration(IFormat format) {
133      if (customConfigurations.ContainsKey(format))
134        return customConfigurations[format];
135      return GetDefaultConfig(format);
136    }
137
138    public void DefineConfiguration(IFormat format, Configuration configuration) {
139      customConfigurations[format] = configuration;
140      SaveSettings();
141    }
142
143  }
144 
145}
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