Exemplo n.º 1
0
 /**
  * Uses reflection to load an implementation of the class. Returns false if it failed for some
  * reason. This allows us to remove implementation classes (for example, to get rid of the
  * dependency on Mozilla for GTK2 users/builds
  */
 private boolean loadEditor(String clazz) {
   try {
     // Don't replace an existing editor
     if (editorPaneImpl != null) return true;
     Class c = Class.forName(clazz);
     editorPaneImpl = (EditorPane) c.getConstructors()[0].newInstance(null);
     return true;
   } catch (Exception e) {
     return false;
   }
 }
Exemplo n.º 2
0
 /** Reflect operations demo */
 public static void reflect(Object obj) {
   // `cls用于描述对象所属的类`
   Class cls = obj.getClass();
   print("Class Name: " + cls.getCanonicalName());
   // `fields包含对象的所有属性`
   Field[] fields = cls.getDeclaredFields();
   print("List of fields:");
   for (Field f : fields) {
     print(String.format("%30s %15s", f.getType(), f.getName()));
   }
   // `methods包含对象的所有方法`
   Method[] methods = cls.getDeclaredMethods();
   print("List of methods:");
   for (Method m : methods)
     print(
         String.format(
             "%30s %15s %30s",
             m.getReturnType(), m.getName(), Arrays.toString(m.getParameterTypes())));
   Constructor[] constructors = cls.getConstructors();
   print("List of contructors:");
   for (Constructor c : constructors)
     print(String.format("%30s %15s", c.getName(), Arrays.toString(c.getParameterTypes())));
 }
Exemplo n.º 3
0
  /**
   * Read Node config from file config.nodeConfigFileName, including available nodes and their
   * possible connections
   */
  public NodeFactory(Config config, ProblemData problemData) {
    this.config = config;
    this.problemData = problemData;
    try {
      FileInputStream in = new FileInputStream(config.nodeConfigFileName);
      Properties props = new Properties();
      props.load(in);
      in.close();

      String separator = "\\s*,\\s*";

      String tmp = props.getProperty("sets");
      String[] sets = tmp.split(separator);

      nodeSets = new NodeSet[sets.length];

      int i, j, k;
      for (i = 0; i < sets.length; i++) {
        nodeSets[i] = new NodeSet(sets[i]);
        String[] nodes;
        tmp = props.getProperty(sets[i] + "Functions");
        if (tmp == null)
          Logger.log(
              "Warning: when reading "
                  + config.nodeConfigFileName
                  + ", no functions found for set "
                  + sets[i]);
        else {
          nodes = tmp.split(separator);
          for (j = 0; j < nodes.length; j++) {
            Class cl = Class.forName("gpalta.nodes." + nodes[j]);
            java.lang.reflect.Constructor co = cl.getConstructor();
            nodeSets[i].addFunction((Node) co.newInstance());
          }
        }
        tmp = props.getProperty(sets[i] + "Terminals");
        if (tmp == null)
          Logger.log(
              "Warning: when reading "
                  + config.nodeConfigFileName
                  + ", no terminals found for set "
                  + sets[i]);
        else {
          nodes = tmp.split(separator);
          for (j = 0; j < nodes.length; j++) {
            Class cl = Class.forName("gpalta.nodes." + nodes[j]);
            if (nodes[j].contains("Var")) {
              for (k = 0; k < problemData.nVars; k++) {
                java.lang.reflect.Constructor[] co = cl.getConstructors();
                nodeSets[i].addTerminal((Node) co[0].newInstance(k + 1));
              }
            } else if (nodes[j].contains("Angle")) {
              for (k = 0; k < problemData.nVars - 1; k++) {
                java.lang.reflect.Constructor[] co = cl.getConstructors();
                nodeSets[i].addTerminal((Node) co[0].newInstance(k + 1));
              }
            } else {
              java.lang.reflect.Constructor co = cl.getConstructor();
              nodeSets[i].addTerminal((Node) co.newInstance());
            }
          }
        }
      }

      for (i = 0; i < nodeSets.length; i++) {
        for (Node n : nodeSets[i].getAll()) {
          n.setType(nodeSets[i]);
        }
      }

      for (i = 0; i < nodeSets.length; i++) {
        for (Node n : nodeSets[i].getAll()) {
          tmp = props.getProperty("kids" + n.getClass().getSimpleName());
          if (tmp != null) {
            String[] kids = tmp.split(separator);
            if (kids.length != n.nKids()) {
              Logger.log(
                  "Error reading "
                      + config.nodeConfigFileName
                      + ": must specify "
                      + n.nKids()
                      + " kids for "
                      + n.getClass().getSimpleName());
            }
            for (j = 0; j < n.nKids(); j++) {
              for (k = 0; k < nodeSets.length; k++) {
                if (nodeSets[k].getName().equals(kids[j])) {
                  n.setTypeOfKids(j, nodeSets[k]);
                  break;
                }
              }
              if (k == nodeSets.length)
                Logger.log(
                    "Error reading "
                        + config.nodeConfigFileName
                        + ": Setting kids for "
                        + n.getClass().getSimpleName()
                        + ", "
                        + kids[j]
                        + " doesn't match any set name");
            }
          } else for (j = 0; j < n.nKids(); j++) n.setTypeOfKids(j, nodeSets[i]);
        }
      }
      tmp = props.getProperty("treeRoot");
      if (tmp == null) {
        Logger.log(
            "Error reading " + config.nodeConfigFileName + ": property \"treeRoot\" not present");
      }
      for (i = 0; i < nodeSets.length; i++) {
        if (nodeSets[i].getName().equals(tmp)) {
          treeRoot = nodeSets[i];
          break;
        }
      }
      if (i == nodeSets.length)
        Logger.log(
            "Error reading "
                + config.nodeConfigFileName
                + ": Setting treeRoot, "
                + tmp
                + " doesn't match any set name");
    } catch (IOException e) {
      Logger.log("Error reading " + config.nodeConfigFileName + ":");
      Logger.log(e);
    } catch (ClassNotFoundException e) {
      Logger.log("Error reading " + config.nodeConfigFileName + ":");
      Logger.log(e);
    } catch (NoSuchMethodException e) {
      Logger.log("Error reading " + config.nodeConfigFileName + ":");
      Logger.log(e);
    } catch (InstantiationException e) {
      Logger.log("Error reading " + config.nodeConfigFileName + ":");
      Logger.log(e);
    } catch (IllegalAccessException e) {
      Logger.log("Error reading " + config.nodeConfigFileName + ":");
      Logger.log(e);
    } catch (InvocationTargetException e) {
      Logger.log("Error reading " + config.nodeConfigFileName + ":");
      Logger.log(e);
    }
  }
Exemplo n.º 4
0
  public static byte[] createAdapterCode(
      ObjToIntMap functionNames,
      String adapterName,
      Class<?> superClass,
      Class<?>[] interfaces,
      String scriptClassName) {
    ClassFileWriter cfw = new ClassFileWriter(adapterName, superClass.getName(), "<adapter>");
    cfw.addField(
        "factory",
        "Laurora/javascript/ContextFactory;",
        (short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
    cfw.addField(
        "delegee",
        "Laurora/javascript/Scriptable;",
        (short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
    cfw.addField(
        "self",
        "Laurora/javascript/Scriptable;",
        (short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
    int interfacesCount = interfaces == null ? 0 : interfaces.length;
    for (int i = 0; i < interfacesCount; i++) {
      if (interfaces[i] != null) cfw.addInterface(interfaces[i].getName());
    }

    String superName = superClass.getName().replace('.', '/');
    Constructor<?>[] ctors = superClass.getConstructors();
    for (Constructor<?> ctor : ctors) {
      generateCtor(cfw, adapterName, superName, ctor);
    }
    generateSerialCtor(cfw, adapterName, superName);
    if (scriptClassName != null) {
      generateEmptyCtor(cfw, adapterName, superName, scriptClassName);
    }

    ObjToIntMap generatedOverrides = new ObjToIntMap();
    ObjToIntMap generatedMethods = new ObjToIntMap();

    // generate methods to satisfy all specified interfaces.
    for (int i = 0; i < interfacesCount; i++) {
      Method[] methods = interfaces[i].getMethods();
      for (int j = 0; j < methods.length; j++) {
        Method method = methods[j];
        int mods = method.getModifiers();
        if (Modifier.isStatic(mods) || Modifier.isFinal(mods)) {
          continue;
        }
        String methodName = method.getName();
        Class<?>[] argTypes = method.getParameterTypes();
        if (!functionNames.has(methodName)) {
          try {
            superClass.getMethod(methodName, argTypes);
            // The class we're extending implements this method and
            // the JavaScript object doesn't have an override. See
            // bug 61226.
            continue;
          } catch (NoSuchMethodException e) {
            // Not implemented by superclass; fall through
          }
        }
        // make sure to generate only one instance of a particular
        // method/signature.
        String methodSignature = getMethodSignature(method, argTypes);
        String methodKey = methodName + methodSignature;
        if (!generatedOverrides.has(methodKey)) {
          generateMethod(cfw, adapterName, methodName, argTypes, method.getReturnType(), true);
          generatedOverrides.put(methodKey, 0);
          generatedMethods.put(methodName, 0);
        }
      }
    }

    // Now, go through the superclass's methods, checking for abstract
    // methods or additional methods to override.

    // generate any additional overrides that the object might contain.
    Method[] methods = getOverridableMethods(superClass);
    for (int j = 0; j < methods.length; j++) {
      Method method = methods[j];
      int mods = method.getModifiers();
      // if a method is marked abstract, must implement it or the
      // resulting class won't be instantiable. otherwise, if the object
      // has a property of the same name, then an override is intended.
      boolean isAbstractMethod = Modifier.isAbstract(mods);
      String methodName = method.getName();
      if (isAbstractMethod || functionNames.has(methodName)) {
        // make sure to generate only one instance of a particular
        // method/signature.
        Class<?>[] argTypes = method.getParameterTypes();
        String methodSignature = getMethodSignature(method, argTypes);
        String methodKey = methodName + methodSignature;
        if (!generatedOverrides.has(methodKey)) {
          generateMethod(cfw, adapterName, methodName, argTypes, method.getReturnType(), true);
          generatedOverrides.put(methodKey, 0);
          generatedMethods.put(methodName, 0);

          // if a method was overridden, generate a "super$method"
          // which lets the delegate call the superclass' version.
          if (!isAbstractMethod) {
            generateSuper(
                cfw,
                adapterName,
                superName,
                methodName,
                methodSignature,
                argTypes,
                method.getReturnType());
          }
        }
      }
    }

    // Generate Java methods for remaining properties that are not
    // overrides.
    ObjToIntMap.Iterator iter = new ObjToIntMap.Iterator(functionNames);
    for (iter.start(); !iter.done(); iter.next()) {
      String functionName = (String) iter.getKey();
      if (generatedMethods.has(functionName)) continue;
      int length = iter.getValue();
      Class<?>[] parms = new Class[length];
      for (int k = 0; k < length; k++) parms[k] = ScriptRuntime.ObjectClass;
      generateMethod(cfw, adapterName, functionName, parms, ScriptRuntime.ObjectClass, false);
    }
    return cfw.toByteArray();
  }