Java ObjectType.hasOwnProperty方法代码示例

import com.google.javascript.rhino.jstype.ObjectType; //导入方法依赖的package包/类
/**
 * Declares a property on its owner, if necessary.
 * @return True if a property was declared.
 */
private boolean ensurePropertyDeclaredHelper(
    Node getprop, ObjectType objectType) {
  String propName = getprop.getLastChild().getString();
  String qName = getprop.getQualifiedName();
  if (qName != null) {
    Var var = syntacticScope.getVar(qName);
    if (var != null && !var.isTypeInferred()) {
      // Handle normal declarations that could not be addressed earlier.
      if (propName.equals("prototype") ||
      // Handle prototype declarations that could not be addressed earlier.
          (!objectType.hasOwnProperty(propName) &&
           (!objectType.isInstanceType() ||
               (var.isExtern() && !objectType.isNativeObjectType())))) {
        return objectType.defineDeclaredProperty(
            propName, var.getType(), var.isExtern());
      }
    }
  }
  return false;
}
 

import com.google.javascript.rhino.jstype.ObjectType; //导入方法依赖的package包/类
@Override public ObjectType getTypeWithProperty(String field, JSType type) {
  if (!(type instanceof ObjectType)) {
    if (type.autoboxesTo() != null) {
      type = type.autoboxesTo();
    } else {
      return null;
    }
  }

  // Ignore the prototype itself at all times.
  if ("prototype".equals(field)) {
    return null;
  }

  // We look up the prototype chain to find the highest place (if any) that
  // this appears.  This will make references to overriden properties look
  // like references to the initial property, so they are renamed alike.
  ObjectType foundType = null;
  ObjectType objType = ObjectType.cast(type);
  while (objType != null && objType.getImplicitPrototype() != objType) {
    if (objType.hasOwnProperty(field)) {
      foundType = objType;
    }
    objType = objType.getImplicitPrototype();
  }
  // If the property does not exist on the referenced type but the original
  // type is an object type, see if any subtype has the property.
  if (foundType == null) {
    ObjectType maybeType = ObjectType.cast(
        registry.getGreatestSubtypeWithProperty(type, field));
    // getGreatestSubtypeWithProperty does not guarantee that the property
    // is defined on the returned type, it just indicates that it might be,
    // so we have to double check.
    if (maybeType != null && maybeType.hasOwnProperty(field)) {
      foundType = maybeType;
    }
  }
  return foundType;
}
 

import com.google.javascript.rhino.jstype.ObjectType; //导入方法依赖的package包/类
/**
 * Given a node, get a human-readable name for the type of that node so
 * that will be easy for the programmer to find the original declaration.
 *
 * For example, if SubFoo's property "bar" might have the human-readable
 * name "Foo.prototype.bar".
 *
 * @param n The node.
 * @param dereference If true, the type of the node will be dereferenced
 *     to an Object type, if possible.
 */
String getReadableJSTypeName(Node n, boolean dereference) {
  // If we're analyzing a GETPROP, the property may be inherited by the
  // prototype chain. So climb the prototype chain and find out where
  // the property was originally defined.
  if (n.getType() == Token.GETPROP) {
    ObjectType objectType = getJSType(n.getFirstChild()).dereference();
    if (objectType != null) {
      String propName = n.getLastChild().getString();
      while (objectType != null && !objectType.hasOwnProperty(propName)) {
        objectType = objectType.getImplicitPrototype();
      }

      // Don't show complex function names or anonymous types.
      // Instead, try to get a human-readable type name.
      if (objectType != null &&
          (objectType.getConstructor() != null ||
           objectType.isFunctionPrototypeType())) {
        return objectType.toString() + "." + propName;
      }
    }
  }

  JSType type = getJSType(n);
  if (dereference) {
    ObjectType dereferenced = type.dereference();
    if (dereferenced != null) {
      type = dereferenced;
    }
  }

  String qualifiedName = n.getQualifiedName();
  if (type.isFunctionPrototypeType() ||
      (type.toObjectType() != null &&
       type.toObjectType().getConstructor() != null)) {
    return type.toString();
  } else if (qualifiedName != null) {
    return qualifiedName;
  } else if (type instanceof FunctionType) {
    // Don't show complex function names.
    return "function";
  } else {
    return type.toString();
  }
}