net.mograsim.logic.ui/src/net/mograsim/logic/ui/serializing/IndirectGUIComponentCreator.java

   1 package net.mograsim.logic.ui.serializing;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.util.Collection;
   6 import java.util.HashMap;
   7 import java.util.Map;
   8
   9 import com.google.gson.JsonElement;
  10
  11 import net.mograsim.logic.ui.model.ViewModelModifiable;
  12 import net.mograsim.logic.ui.model.components.GUIComponent;
  13 import net.mograsim.logic.ui.util.JsonHandler;
  14
  15 public class IndirectGUIComponentCreator
  16 {
  17         private static final Map<String, String> standardComponentIDs = new HashMap<>();
  18
  19         private static final Map<String, ComponentProvider> componentProviders = new HashMap<>();
  20
  21         static
  22         {
  23                 try (InputStream s = IndirectGUIComponentCreator.class.getResourceAsStream("./standardComponentIDMapping.json"))
  24                 {
  25                         if (s == null)
  26                                 throw new IOException("Resource not found");
  27                         Map<String, String> tmp = JsonHandler.readJson(s, Map.class);
  28                         // don't use putAll to apply sanity checks
  29                         tmp.forEach((st, id) ->
  30                         {
  31                                 try
  32                                 {
  33                                         addStandardComponentID(st, id);
  34                                 }
  35                                 catch (IllegalArgumentException e)
  36                                 {
  37                                         System.err.println("Component ID mapping contained illegal entry: " + e.getMessage());
  38                                 }
  39                         });
  40                 }
  41                 catch (IOException e)
  42                 {
  43                         System.err.println("Failed to initialize standard snippet ID mapping: " + e.getMessage());
  44                 }
  45         }
  46
  47         public static Collection<String> getStandardComponentIDs()
  48         {
  49                 return standardComponentIDs.keySet();
  50         }
  51
  52         public static void addStandardComponentID(String standardComponentID, String associatedComponentID)
  53         {
  54                 if (!associatedComponentID.startsWith("file:") && !associatedComponentID.startsWith("class:"))
  55                         throw new IllegalArgumentException("Unrecognized component ID format: " + associatedComponentID);
  56                 standardComponentIDs.put(standardComponentID, associatedComponentID);
  57         }
  58
  59         public static void setComponentProvider(String className, ComponentProvider componentProvider)
  60         {
  61                 componentProviders.put(className, componentProvider);
  62         }
  63
  64         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params)
  65         {
  66                 if (id != null)
  67                 {
  68                         String resolvedID;
  69                         if (id.startsWith("class:") || id.startsWith("file:"))
  70                                 resolvedID = id;
  71                         else
  72                                 resolvedID = standardComponentIDs.get(id);
  73                         if (resolvedID.startsWith("class:"))
  74                         {
  75                                 String className = resolvedID.substring(6);
  76                                 tryLoadComponentClass(className);
  77                                 ComponentProvider componentProvider = componentProviders.get(className);
  78                                 if (componentProvider != null)
  79                                         return componentProvider.create(model, params);
  80                         } else
  81                                 // we know id has to start with "file:" here
  82                                 // because standardComponentIDs only contains strings starting with "class:" or "file:"
  83                                 return SubmodelComponentDeserializer.create(model, resolvedID.substring(5));
  84                 }
  85                 throw new RuntimeException("Could not get component provider for ID " + id);
  86         }
  87
  88         private static void tryLoadComponentClass(String componentClassName)
  89         {
  90                 CodeSnippetSupplier.tryInvokeStaticInitializer(componentClassName, "Error loading component class %s: %s\n");
  91         }
  92
  93         public static interface ComponentProvider
  94         {
  95                 public GUIComponent create(ViewModelModifiable model, JsonElement params);
  96         }
  97 }