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source: branches/New Persistence Exploration/Persistence/Persistence/PersistenceConfiguration.cs @ 1357

Last change on this file since 1357 was 1357, checked in by epitzer, 15 years ago

Pluginification and major refactoring. (#506)

File size: 3.0 KB
Line 
1using System;
2using System.Collections.Generic;
3using System.Reflection;
4using HeuristicLab.Persistence.Interfaces;
5
6namespace HeuristicLab.Persistence {
7
8  public class PersistenceConfiguration {
9
10    private readonly List<IFormatter> formatters;
11    private readonly List<IDecomposer> decomposers;
12    private readonly Dictionary<IFormat, Dictionary<Type, IFormatter>> formatterConfig;
13    private readonly Dictionary<Type, IDecomposer> decomposerCache;
14
15    private static PersistenceConfiguration instance;
16    public static PersistenceConfiguration Instance {
17      get {
18        if (instance == null) {
19          instance = new PersistenceConfiguration();
20          instance.DefaultConfig();
21        }
22        return instance;
23      }
24    }
25
26    public PersistenceConfiguration() {
27      formatters = new List<IFormatter>();
28      decomposers = new List<IDecomposer>();
29      formatterConfig = new Dictionary<IFormat, Dictionary<Type, IFormatter>>();
30      decomposerCache = new Dictionary<Type, IDecomposer>();
31    }
32
33    public void DiscoverFrom(Assembly a) {
34      foreach ( Type t in a.GetTypes() ) {
35        if (t.GetInterface(typeof(IFormatter).FullName) != null) {
36          try {
37            formatters.Add((IFormatter) Activator.CreateInstance(t, true));
38          } catch (MissingMethodException) {
39            Console.WriteLine("WARNING: Could not instantiate {0}", t.FullName);
40          }
41        }
42        if (t.GetInterface(typeof(IDecomposer).FullName) != null) {
43          try {
44            decomposers.Add((IDecomposer) Activator.CreateInstance(t, true));
45          } catch (MissingMethodException) {
46            Console.WriteLine("WARNING: Could not instantiate {0}", t.FullName);
47          }
48        }
49      }
50    }
51
52    public void DiscoverAll() {     
53      DiscoverFrom(Assembly.GetAssembly(this.GetType()));
54      foreach ( Assembly a in AppDomain.CurrentDomain.GetAssemblies() )
55        DiscoverFrom(a);
56    }
57
58    public void DefaultConfig() {
59      DiscoverAll();
60      foreach ( IFormatter f in formatters ) {
61        if ( ! formatterConfig.ContainsKey(f.Format) )
62          formatterConfig.Add(f.Format, new Dictionary<Type, IFormatter>());
63        if (!formatterConfig[f.Format].ContainsKey(f.Type))
64          formatterConfig[f.Format][f.Type] = f;
65      }
66    }   
67
68    public IFormatter GetFormatter(IFormat format, Type type) {
69      Dictionary<Type, IFormatter> typeMap;
70      formatterConfig.TryGetValue(format, out typeMap);
71      if ( typeMap == null )
72        return null;
73      IFormatter formatter;
74      typeMap.TryGetValue(type, out formatter);
75      return formatter;
76    }
77
78    public IDecomposer GetDecomposer(Type type) {
79      IDecomposer decomposer;
80      decomposerCache.TryGetValue(type, out decomposer);
81      if (decomposer != null)
82        return decomposer;
83      foreach ( IDecomposer d in decomposers ) {
84        if (d.CanSerialize(type)) {
85          decomposerCache.Add(type, d);
86          return d;
87        }
88      }
89      return null;
90    }
91
92  }
93 
94}
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