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.Objects;
  10 import com.google.gson.JsonElement;
  11 import com.google.gson.JsonNull;
  12 import com.google.gson.JsonObject;
  13
  14 import net.mograsim.logic.model.model.ViewModelModifiable;
  15 import net.mograsim.logic.model.model.components.GUIComponent;
  16 import net.mograsim.logic.model.model.components.submodels.SubmodelComponent;
  17 import net.mograsim.logic.model.snippets.CodeSnippetSupplier;
  18 import net.mograsim.logic.model.util.JsonHandler;
  19
  20 public class IndirectGUIComponentCreator
  21 {
  22         private static final Map<String, String> standardComponentIDs = new HashMap<>();
  23         private static final Map<String, String> standardComponentIDsUnmodifiable = Collections.unmodifiableMap(standardComponentIDs);
  24
  25         private static final Map<String, ComponentSupplier> componentSuppliers = new HashMap<>();
  26         private static final Map<String, ResourceLoader> resourceLoaders = new HashMap<>();
  27         private static final Map<String, JsonObject> componentCache = new HashMap<>();
  28
  29         static
  30         {
  31                 loadStandardComponentIDs(IndirectGUIComponentCreator.class.getResourceAsStream("standardComponentIDMapping.json"));
  32         }
  33
  34         public static void loadStandardComponentIDs(InputStream standardComponentIdMappingStream)
  35         {
  36                 try (InputStream s = standardComponentIdMappingStream)
  37                 {
  38                         if (s == null)
  39                                 throw new IOException("Resource not found");
  40                         Map<String, String> tmp = JsonHandler.readJson(s, Map.class);
  41                         // don't use putAll to apply sanity checks
  42                         tmp.forEach((st, id) ->
  43                         {
  44                                 try
  45                                 {
  46                                         addStandardComponentID(st, id);
  47                                 }
  48                                 catch (IllegalArgumentException e)
  49                                 {
  50                                         System.err.println("Component ID mapping contained illegal entry: " + e.getMessage());
  51                                 }
  52                         });
  53                 }
  54                 catch (IOException e)
  55                 {
  56                         System.err.println("Failed to initialize standard snippet ID mapping: " + e.getMessage());
  57                 }
  58         }
  59
  60         public static void addStandardComponentID(String standardComponentID, String associatedComponentID)
  61         {
  62                 if (!associatedComponentID.matches("(file|class|resource):.+"))
  63                         throw new IllegalArgumentException("Unrecognized component ID format: " + associatedComponentID);
  64                 standardComponentIDs.put(standardComponentID, associatedComponentID);
  65         }
  66
  67         public static Map<String, String> getStandardComponentIDs()
  68         {
  69                 return standardComponentIDsUnmodifiable;
  70         }
  71
  72         public static void setComponentSupplier(String className, ComponentSupplier componentSupplier)
  73         {
  74                 componentSuppliers.put(className, componentSupplier);
  75         }
  76
  77         public static GUIComponent createComponent(ViewModelModifiable model, String id)
  78         {
  79                 return createComponent(model, id, (String) null);
  80         }
  81
  82         public static GUIComponent createComponent(ViewModelModifiable model, String id, String name)
  83         {
  84                 return createComponent(model, id, JsonNull.INSTANCE, name);
  85         }
  86
  87         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params)
  88         {
  89                 return createComponent(model, id, params, null);
  90         }
  91
  92         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params, String name)
  93         {
  94                 if (id != null)
  95                 {
  96                         if (componentCache.containsKey(id))
  97                                 return loadComponentFromJsonObject(model, id, name, componentCache.get(id));
  98                         String resolvedID = resolveID(id);
  99                         if (resolvedID != null)
 100                         {
 101                                 if (resolvedID.startsWith("class:"))
 102                                 {
 103                                         String className = resolvedID.substring(6);
 104                                         tryLoadComponentClass(className);
 105                                         ComponentSupplier componentSupplier = componentSuppliers.get(className);
 106                                         if (componentSupplier != null)
 107                                                 return componentSupplier.create(model, params, name);
 108                                         throw new IllegalArgumentException("Component supplier not found for ID " + id + " (resolved: " + resolvedID + ")");
 109                                 } else if (params != null && !JsonNull.INSTANCE.equals(params))
 110                                         throw new IllegalArgumentException("Can't give params to a component deserialized from a JSON file");
 111                                 if (resolvedID.startsWith("resource:"))
 112                                 {
 113                                         String[] parts = resolvedID.split(":");
 114                                         if (parts.length != 3)
 115                                                 throw new IllegalArgumentException("invaild resource id: " + resolvedID);
 116                                         String rLoadID = parts[1];
 117                                         String resID = parts[2];
 118                                         try
 119                                         {
 120                                                 ResourceLoader loader;
 121                                                 if (!resourceLoaders.containsKey(rLoadID))
 122                                                 {
 123                                                         Class<?> c = Class.forName(rLoadID);
 124                                                         if (ResourceLoader.class.isAssignableFrom(c))
 125                                                                 loader = (ResourceLoader) c.getConstructor().newInstance();
 126                                                         else
 127                                                                 loader = (ResourceLoader) Objects.requireNonNull(c.getMethod("resourceLoader").invoke(null));
 128                                                         resourceLoaders.put(rLoadID, loader);
 129                                                 } else
 130                                                 {
 131                                                         loader = Objects.requireNonNull(resourceLoaders.get(parts[1]));
 132                                                 }
 133                                                 if (resID.endsWith(".json"))
 134                                                 {
 135                                                         JsonObject jsonContents = JsonHandler.readJson(loader.loadResource(resID), JsonObject.class);
 136                                                         return loadComponentFromJsonObject(model, id, name, jsonContents);
 137                                                 }
 138                                                 if (!componentSuppliers.containsKey(resID))
 139                                                         loader.loadClass(resID);
 140                                                 ComponentSupplier componentSupplier = componentSuppliers.get(resID);
 141                                                 if (componentSupplier != null)
 142                                                         return componentSupplier.create(model, params, name);
 143                                                 throw new IllegalArgumentException("Component supplier not found for ID " + id + " (class cannot initialize?)");
 144                                         }
 145                                         catch (IOException e)
 146                                         {
 147                                                 throw new UncheckedIOException(e);
 148                                         }
 149                                         catch (ClassCastException | ReflectiveOperationException e)
 150                                         {
 151                                                 throw new IllegalArgumentException("class not found / invaild resource loader specified:" + parts[1], e);
 152                                         }
 153                                 } else if (resolvedID.startsWith("file:"))
 154                                 {
 155                                         try
 156                                         {
 157                                                 String filename = resolvedID.substring(5);
 158                                                 JsonObject jsonContents = JsonHandler.readJson(filename, JsonObject.class);
 159                                                 return loadComponentFromJsonObject(model, id, name, jsonContents);
 160                                         }
 161                                         catch (IOException e)
 162                                         {
 163                                                 throw new UncheckedIOException(e);
 164                                         }
 165                                 } else
 166                                 {
 167                                         throw new IllegalArgumentException("unable to resolve/interpret id" + resolvedID);
 168                                 }
 169                         }
 170                 }
 171                 throw new RuntimeException("Could not get component supplier for ID " + id);
 172         }
 173
 174         public static String resolveID(String id)
 175         {
 176                 if (id.matches("(file|class|resource):.+"))
 177                         return id;
 178                 return standardComponentIDs.get(id);
 179         }
 180
 181         private static SubmodelComponent loadComponentFromJsonObject(ViewModelModifiable model, String id, String name, JsonObject jsonContents)
 182         {
 183                 componentCache.putIfAbsent(id, jsonContents);
 184                 SerializablePojo jsonContentsAsSerializablePojo = JsonHandler.parser.fromJson(jsonContents, SerializablePojo.class);
 185                 if (jsonContentsAsSerializablePojo.version == null)
 186                         return LegacySubmodelComponentSerializer.deserialize(model,
 187                                         JsonHandler.parser.fromJson(jsonContents, LegacySubmodelComponentParams.class), name, id, null);
 188                 return SubmodelComponentSerializer.deserialize(model, JsonHandler.parser.fromJson(jsonContents, SubmodelComponentParams.class),
 189                                 name, id, null);
 190         }
 191
 192         public static void registerResourceLoader(ResourceLoader resourceLoader)
 193         {
 194                 registerResourceLoader(resourceLoader, resourceLoader.getClass());
 195         }
 196
 197         public static void registerResourceLoader(ResourceLoader resourceLoader, Class<?> reference)
 198         {
 199                 resourceLoaders.put(reference.getName(), Objects.requireNonNull(resourceLoader));
 200         }
 201
 202         public static void registerResourceLoader(ResourceLoader resourceLoader, String reference)
 203         {
 204                 resourceLoaders.put(reference, Objects.requireNonNull(resourceLoader));
 205         }
 206
 207         private static void tryLoadComponentClass(String componentClassName)
 208         {
 209                 CodeSnippetSupplier.tryInvokeStaticInitializer(componentClassName, "Error loading component class %s: %s\n");
 210         }
 211
 212         public static interface ComponentSupplier
 213         {
 214                 public GUIComponent create(ViewModelModifiable model, JsonElement params, String name);
 215         }
 216 }