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

   1 package net.mograsim.logic.model.serializing;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.io.UncheckedIOException;
   6 import java.util.Collections;
   7 import java.util.HashMap;
   8 import java.util.Map;
   9 import java.util.Set;
  10
  11 import com.google.gson.JsonElement;
  12 import com.google.gson.JsonNull;
  13
  14 import net.mograsim.logic.model.model.ViewModelModifiable;
  15 import net.mograsim.logic.model.model.components.GUIComponent;
  16 import net.mograsim.logic.model.snippets.CodeSnippetSupplier;
  17 import net.mograsim.logic.model.util.JsonHandler;
  18
  19 public class IndirectGUIComponentCreator
  20 {
  21         private static final Map<String, String> standardComponentIDs = new HashMap<>();
  22         private static final Set<String> standardComponentIDSetUnmodifiable = Collections.unmodifiableSet(standardComponentIDs.keySet());
  23
  24         private static final Map<String, ComponentSupplier> componentSuppliers = new HashMap<>();
  25
  26         static
  27         {
  28                 try (InputStream s = IndirectGUIComponentCreator.class.getResourceAsStream("./standardComponentIDMapping.json"))
  29                 {
  30                         if (s == null)
  31                                 throw new IOException("Resource not found");
  32                         Map<String, String> tmp = JsonHandler.readJson(s, Map.class);
  33                         // don't use putAll to apply sanity checks
  34                         tmp.forEach((st, id) ->
  35                         {
  36                                 try
  37                                 {
  38                                         addStandardComponentID(st, id);
  39                                 }
  40                                 catch (IllegalArgumentException e)
  41                                 {
  42                                         System.err.println("Component ID mapping contained illegal entry: " + e.getMessage());
  43                                 }
  44                         });
  45                 }
  46                 catch (IOException e)
  47                 {
  48                         System.err.println("Failed to initialize standard snippet ID mapping: " + e.getMessage());
  49                 }
  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 Set<String> getStandardComponentIDs()
  60         {
  61                 return standardComponentIDSetUnmodifiable;
  62         }
  63
  64         public static void setComponentSupplier(String className, ComponentSupplier componentSupplier)
  65         {
  66                 componentSuppliers.put(className, componentSupplier);
  67         }
  68
  69         public static GUIComponent createComponent(ViewModelModifiable model, String id)
  70         {
  71                 return createComponent(model, id, (String) null);
  72         }
  73
  74         public static GUIComponent createComponent(ViewModelModifiable model, String id, String name)
  75         {
  76                 return createComponent(model, id, JsonNull.INSTANCE, name);
  77         }
  78
  79         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params)
  80         {
  81                 return createComponent(model, id, params, null);
  82         }
  83
  84         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params, String name)
  85         {
  86                 if (id != null)
  87                 {
  88                         String resolvedID;
  89                         if (id.startsWith("class:") || id.startsWith("file:"))
  90                                 resolvedID = id;
  91                         else
  92                                 resolvedID = standardComponentIDs.get(id);
  93                         if (resolvedID != null)
  94                         {
  95                                 if (resolvedID.startsWith("class:"))
  96                                 {
  97                                         String className = resolvedID.substring(6);
  98                                         tryLoadComponentClass(className);
  99                                         ComponentSupplier componentSupplier = componentSuppliers.get(className);
 100                                         if (componentSupplier != null)
 101                                                 return componentSupplier.create(model, params, name);
 102                                 } else
 103                                 // we know id has to start with "file:" here
 104                                 // because standardComponentIDs only contains strings starting with "class:" or "file:"
 105                                 if (params != null && !JsonNull.INSTANCE.equals(params))
 106                                         throw new IllegalArgumentException("Can't give params to a component deserialized from a JSON file");
 107                                 try
 108                                 {
 109                                         return SubmodelComponentSerializer.deserialize(model, resolvedID.substring(5), name, id, null);
 110                                 }
 111                                 catch (IOException e)
 112                                 {
 113                                         throw new UncheckedIOException(e);
 114                                 }
 115                         }
 116                 }
 117                 throw new RuntimeException("Could not get component supplier for ID " + id);
 118         }
 119
 120         private static void tryLoadComponentClass(String componentClassName)
 121         {
 122                 CodeSnippetSupplier.tryInvokeStaticInitializer(componentClassName, "Error loading component class %s: %s\n");
 123         }
 124
 125         public static interface ComponentSupplier
 126         {
 127                 public GUIComponent create(ViewModelModifiable model, JsonElement params, String name);
 128         }
 129 }