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 com.aliyun.odps.mapred.bridge;
  
  import java.net.URL;
  import java.net.URLClassLoader;
  
  import org.apache.commons.lang.StringUtils;
  
  import com.aliyun.odps.Column;
  import com.aliyun.odps.io.Writable;
  import com.aliyun.odps.io.WritableUtils;
  import com.aliyun.odps.mapred.conf.BridgeJobConf;
  import com.aliyun.odps.udf.StandaloneUDTF;
  import com.aliyun.odps.udf.UDFException;
  
  public abstract class LotTaskUDTF extends StandaloneUDTF {
  
    protected BridgeJobConf conf;
    protected Column[] inputSchema;
  
    public LotTaskUDTF() {
      URL url = this.getClass().getClassLoader().getResource("jobconf.xml");
      if (url == null) {
        URL[] urls = ((URLClassLoader) this.getClass().getClassLoader()).getURLs();
        throw new RuntimeException("Job configure file jobconf.xml not found. Classpath:"
                                   + StringUtils.join(urls, ":"));
      }
      conf = new BridgeJobConf(false);
      conf.addResource("jobconf.xml");
    }
  
    public LotTaskUDTF(String functionName) {
      this();
      conf.set("odps.mr.sql.functionName", functionName);
    }
  
    /**
     * A hack to work around with protected method forward(...)
     *
     * @param objs
     */
    public void collect(Object[] objs) {
      try {
        forward(objs);
      } catch (UDFException e) {
        throw new RuntimeException(e);
      }
    }
  
    /**
     * Deep copy of writable objects. Not that different from primative types, the
     * references within the writable array are also reused.
     *
     * @param objs
     * @return object array
     */
    protected Object[] writableDeepCopy(Object[] objs) {
      Writable[] rt = new Writable[objs.length];
      for (int i = 0; i < objs.length; i++) {
        if (objs[i] != null) {
          rt[i] = (Writable) WritableUtils.clone((Writable) objs[i], conf);
        }
      }
      return rt;
    }
  
    @Override
    public void process(Object[] unused) throws UDFException {
    }
  }
  