content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * 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.alibaba.otter.node.etl.load.loader.interceptor;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import com.alibaba.otter.node.etl.common.db.dialect.DbDialect;
  import com.alibaba.otter.node.etl.load.loader.LoadContext;
  import com.alibaba.otter.shared.etl.model.ObjectData;
  
  public class ChainLoadInterceptor extends AbstractLoadInterceptor<LoadContext, ObjectData> {
  
      private List<LoadInterceptor> interceptors = new ArrayList<LoadInterceptor>();
  
      public void prepare(LoadContext context) {
          if (interceptors == null) {
              return;
          }
  
          for (LoadInterceptor interceptor : interceptors) {
              interceptor.prepare(context);
          }
      }
  
      public boolean before(LoadContext context, ObjectData currentData) {
          if (interceptors == null) {
              return false;
          }
  
          boolean result = false;
          for (LoadInterceptor interceptor : interceptors) {
              result |= interceptor.before(context, currentData);
              if (result) {// 出现一个true就退出
                  return result;
              }
          }
          return result;
      }
  
      public void transactionBegin(LoadContext context, List<ObjectData> currentDatas, DbDialect dialect) {
          if (interceptors == null) {
              return;
          }
  
          for (LoadInterceptor interceptor : interceptors) {
              interceptor.transactionBegin(context, currentDatas, dialect);
          }
      }
  
      public void transactionEnd(LoadContext context, List<ObjectData> currentDatas, DbDialect dialect) {
          if (interceptors == null) {
              return;
          }
  
          for (LoadInterceptor interceptor : interceptors) {
              interceptor.transactionEnd(context, currentDatas, dialect);
          }
      }
  
      public void after(LoadContext context, ObjectData currentData) {
          if (interceptors == null) {
              return;
          }
  
          for (LoadInterceptor interceptor : interceptors) {
              interceptor.after(context, currentData);
          }
      }
  
      public void commit(LoadContext context) {
          if (interceptors == null) {
              return;
          }
  
          for (LoadInterceptor interceptor : interceptors) {
              interceptor.commit(context);
          }
      }
  
      public void error(LoadContext context) {
          if (interceptors == null) {
              return;
          }
  
          for (LoadInterceptor interceptor : interceptors) {
              interceptor.error(context);
          }
      }
  
      public void setInterceptors(List<LoadInterceptor> interceptors) {
          this.interceptors = interceptors;
      }
  
  }
  