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
  10 import com.google.gson.JsonElement;
  11 import com.google.gson.JsonNull;
  12
  13 import net.mograsim.logic.model.model.ViewModelModifiable;
  14 import net.mograsim.logic.model.model.components.GUIComponent;
  15 import net.mograsim.logic.model.snippets.CodeSnippetSupplier;
  16 import net.mograsim.logic.model.util.JsonHandler;
  17
  18 public class IndirectGUIComponentCreator
  19 {
  20         private static final Map<String, String> standardComponentIDs = new HashMap<>();
  21         private static final Map<String, String> standardComponentIDsUnmodifiable = Collections.unmodifiableMap(standardComponentIDs);
  22
  23         private static final Map<String, ComponentSupplier> componentSuppliers = new HashMap<>();
  24
  25         static
  26         {
  27                 try (InputStream s = IndirectGUIComponentCreator.class.getResourceAsStream("standardComponentIDMapping.json"))
  28                 {
  29                         if (s == null)
  30                                 throw new IOException("Resource not found");
  31                         Map<String, String> tmp = JsonHandler.readJson(s, Map.class);
  32                         // don't use putAll to apply sanity checks
  33                         tmp.forEach((st, id) ->
  34                         {
  35                                 try
  36                                 {
  37                                         addStandardComponentID(st, id);
  38                                 }
  39                                 catch (IllegalArgumentException e)
  40                                 {
  41                                         System.err.println("Component ID mapping contained illegal entry: " + e.getMessage());
  42                                 }
  43                         });
  44                 }
  45                 catch (IOException e)
  46                 {
  47                         System.err.println("Failed to initialize standard snippet ID mapping: " + e.getMessage());
  48                 }
  49         }
  50
  51         public static void addStandardComponentID(String standardComponentID, String associatedComponentID)
  52         {
  53                 if (!associatedComponentID.startsWith("file:") && !associatedComponentID.startsWith("class:"))
  54                         throw new IllegalArgumentException("Unrecognized component ID format: " + associatedComponentID);
  55                 standardComponentIDs.put(standardComponentID, associatedComponentID);
  56         }
  57
  58         public static Map<String, String> getStandardComponentIDs()
  59         {
  60                 return standardComponentIDsUnmodifiable;
  61         }
  62
  63         public static void setComponentSupplier(String className, ComponentSupplier componentSupplier)
  64         {
  65                 componentSuppliers.put(className, componentSupplier);
  66         }
  67
  68         public static GUIComponent createComponent(ViewModelModifiable model, String id)
  69         {
  70                 return createComponent(model, id, (String) null);
  71         }
  72
  73         public static GUIComponent createComponent(ViewModelModifiable model, String id, String name)
  74         {
  75                 return createComponent(model, id, JsonNull.INSTANCE, name);
  76         }
  77
  78         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params)
  79         {
  80                 return createComponent(model, id, params, null);
  81         }
  82
  83         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params, String name)
  84         {
  85                 if (id != null)
  86                 {
  87                         String resolvedID = resolveID(id);
  88                         if (resolvedID != null)
  89                         {
  90                                 if (resolvedID.startsWith("class:"))
  91                                 {
  92                                         String className = resolvedID.substring(6);
  93                                         tryLoadComponentClass(className);
  94                                         ComponentSupplier componentSupplier = componentSuppliers.get(className);
  95                                         if (componentSupplier != null)
  96                                                 return componentSupplier.create(model, params, name);
  97                                         throw new IllegalArgumentException("Component supplier not found for ID " + id + " (resolved: " + resolvedID + ")");
  98                                 } else
  99                                 // we know id has to start with "file:" here
 100                                 // because standardComponentIDs only contains strings starting with "class:" or "file:"
 101                                 if (params != null && !JsonNull.INSTANCE.equals(params))
 102                                         throw new IllegalArgumentException("Can't give params to a component deserialized from a JSON file");
 103                                 try
 104                                 {
 105                                         return SubmodelComponentSerializer.deserialize(model, resolvedID.substring(5), name, id, null);
 106                                 }
 107                                 catch (IOException e)
 108                                 {
 109                                         throw new UncheckedIOException(e);
 110                                 }
 111                         }
 112                 }
 113                 throw new RuntimeException("Could not get component supplier for ID " + id);
 114         }
 115
 116         public static String resolveID(String id)
 117         {
 118                 if (id.startsWith("class:") || id.startsWith("file:"))
 119                         return id;
 120                 return standardComponentIDs.get(id);
 121         }
 122
 123         private static void tryLoadComponentClass(String componentClassName)
 124         {
 125                 CodeSnippetSupplier.tryInvokeStaticInitializer(componentClassName, "Error loading component class %s: %s\n");
 126         }
 127
 128         public static interface ComponentSupplier
 129         {
 130                 public GUIComponent create(ViewModelModifiable model, JsonElement params, String name);
 131         }
 132 }