content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.weex.ui;
  
  import org.apache.weex.WXSDKInstance;
  import org.apache.weex.dom.RenderContext;
  import org.apache.weex.ui.component.WXComponent;
  
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   * Class for rendering view. Method in this class should be run in main thread.
   * This class is also <strong>not</storng> thread safe.
   */
  class RenderContextImpl implements RenderContext {
  
    private Map<String, WXComponent> mRegistry;
    private WXSDKInstance mWXSDKInstance;
  
    public RenderContextImpl(WXSDKInstance instance) {
      mWXSDKInstance = instance;
      mRegistry = new ConcurrentHashMap<>();
    }
  
    public void destroy() {
      mWXSDKInstance = null;
      try {
        mRegistry.clear();
      } catch (Throwable e) {
        e.printStackTrace();
      }
    }
  
    public WXSDKInstance getWXSDKInstance() {
      return mWXSDKInstance;
    }
  
    @Override
    public WXSDKInstance getInstance() {
      return mWXSDKInstance;
    }
  
    @Override
    public WXComponent getComponent(String ref) {
      return mRegistry.get(ref);
    }
  
    public void registerComponent(String ref, WXComponent comp) {
      mRegistry.put(ref, comp);
    }
  
    @Override
    public WXComponent unregisterComponent(String ref) {
      return mRegistry.remove(ref);
    }
  
    public int getComponentCount(){
      return mRegistry.size();
    }
  }
  