user/src/com/google/gwt/uibinder/rebind/GwtDomHtmlElementFactory.java

/*
 * Copyright 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.uibinder.rebind;

import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.dom.client.TagName;

/**
 * Looks up implementation of DOM elements via @TagName interface in GWT DOM
 * package.
 */
public class GwtDomHtmlElementFactory implements HtmlElementFactory {

  public JClassType findElementTypeForTag(String htmlTag, TypeOracle oracle) {
    JClassType elementClass = oracle.findType("com.google.gwt.dom.client.Element");
    JClassType[] types = elementClass.getSubtypes();
    for (JClassType type : types) {
      TagName annotation = type.getAnnotation(TagName.class);
      if (annotation != null) {
        for (String annotationTag : annotation.value()) {
          if (annotationTag.equals(htmlTag)) {
            return type;
          }
        }
      }
    }
    return elementClass;
  }
}