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.HashMap;
   7 import java.util.Map;
   8
   9 import com.google.gson.JsonElement;
  10 import com.google.gson.JsonNull;
  11
  12 import net.mograsim.logic.model.model.ViewModelModifiable;
  13 import net.mograsim.logic.model.model.components.GUIComponent;
  14 import net.mograsim.logic.model.snippets.CodeSnippetSupplier;
  15 import net.mograsim.logic.model.util.JsonHandler;
  16
  17 public class IndirectGUIComponentCreator
  18 {
  19         private static final Map<String, String> standardComponentIDs = new HashMap<>();
  20
  21         private static final Map<String, ComponentSupplier> componentSuppliers = new HashMap<>();
  22
  23         static
  24         {
  25                 try (InputStream s = IndirectGUIComponentCreator.class.getResourceAsStream("./standardComponentIDMapping.json"))
  26                 {
  27                         if (s == null)
  28                                 throw new IOException("Resource not found");
  29                         Map<String, String> tmp = JsonHandler.readJson(s, Map.class);
  30                         // don't use putAll to apply sanity checks
  31                         tmp.forEach((st, id) ->
  32                         {
  33                                 try
  34                                 {
  35                                         addStandardComponentID(st, id);
  36                                 }
  37                                 catch (IllegalArgumentException e)
  38                                 {
  39                                         System.err.println("Component ID mapping contained illegal entry: " + e.getMessage());
  40                                 }
  41                         });
  42                 }
  43                 catch (IOException e)
  44                 {
  45                         System.err.println("Failed to initialize standard snippet ID mapping: " + e.getMessage());
  46                 }
  47         }
  48
  49         public static void addStandardComponentID(String standardComponentID, String associatedComponentID)
  50         {
  51                 if (!associatedComponentID.startsWith("file:") && !associatedComponentID.startsWith("class:"))
  52                         throw new IllegalArgumentException("Unrecognized component ID format: " + associatedComponentID);
  53                 standardComponentIDs.put(standardComponentID, associatedComponentID);
  54         }
  55
  56         public static void setComponentSupplier(String className, ComponentSupplier componentSupplier)
  57         {
  58                 componentSuppliers.put(className, componentSupplier);
  59         }
  60
  61         public static GUIComponent createComponent(ViewModelModifiable model, String id)
  62         {
  63                 return createComponent(model, id, (String) null);
  64         }
  65
  66         public static GUIComponent createComponent(ViewModelModifiable model, String id, String name)
  67         {
  68                 return createComponent(model, id, JsonNull.INSTANCE, name);
  69         }
  70
  71         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params)
  72         {
  73                 return createComponent(model, id, params, null);
  74         }
  75
  76         public static GUIComponent createComponent(ViewModelModifiable model, String id, JsonElement params, String name)
  77         {
  78                 if (id != null)
  79                 {
  80                         String resolvedID;
  81                         if (id.startsWith("class:") || id.startsWith("file:"))
  82                                 resolvedID = id;
  83                         else
  84                                 resolvedID = standardComponentIDs.get(id);
  85                         if (resolvedID.startsWith("class:"))
  86                         {
  87                                 String className = resolvedID.substring(6);
  88                                 tryLoadComponentClass(className);
  89                                 ComponentSupplier componentSupplier = componentSuppliers.get(className);
  90                                 if (componentSupplier != null)
  91                                         return componentSupplier.create(model, params, name);
  92                         } else
  93                         // we know id has to start with "file:" here
  94                         // because standardComponentIDs only contains strings starting with "class:" or "file:"
  95                         if (params != null && !JsonNull.INSTANCE.equals(params))
  96                                 throw new IllegalArgumentException("Can't give params to a component deserialized from a JSON file");
  97                         try
  98                         {
  99                                 return SubmodelComponentSerializer.deserialize(model, resolvedID.substring(5), name, id, null);
 100                         }
 101                         catch (IOException e)
 102                         {
 103                                 throw new UncheckedIOException(e);
 104                         }
 105                 }
 106                 throw new RuntimeException("Could not get component supplier for ID " + id);
 107         }
 108
 109         private static void tryLoadComponentClass(String componentClassName)
 110         {
 111                 CodeSnippetSupplier.tryInvokeStaticInitializer(componentClassName, "Error loading component class %s: %s\n");
 112         }
 113
 114         public static interface ComponentSupplier
 115         {
 116                 public GUIComponent create(ViewModelModifiable model, JsonElement params, String name);
 117         }
 118 }