import org.apache.hadoop.cli.util.CommandExecutor.Result; //导入依赖的package包/类
/**
 * Compare the actual output with the expected output
 * @param compdata
 * @return
 */
private boolean compareTestOutput(ComparatorData compdata, Result cmdResult) {
  // Compare the output based on the comparator
  String comparatorType = compdata.getComparatorType();
  Class<?> comparatorClass = null;
  
  // If testMode is "test", then run the command and compare the output
  // If testMode is "nocompare", then run the command and dump the output.
  // Do not compare
  
  boolean compareOutput = false;
  
  if (testMode.equals(TESTMODE_TEST)) {
    try {
  	// Initialize the comparator class and run its compare method
      comparatorClass = Class.forName("org.apache.hadoop.cli.util." + 
        comparatorType);
      ComparatorBase comp = (ComparatorBase) comparatorClass.newInstance();
      compareOutput = comp.compare(cmdResult.getCommandOutput(), 
        expandCommand(compdata.getExpectedOutput()));
    } catch (Exception e) {
      LOG.info("Error in instantiating the comparator" + e);
    }
  }
  
  return compareOutput;
}
 

import org.apache.hadoop.cli.util.CommandExecutor.Result; //导入依赖的package包/类
@Override
protected Result execute(CLICommand cmd) throws Exception {
  if (cmd.getType() instanceof CLICommandMRAdmin)
    return new TestMRCLI.MRCmdExecutor(jobtracker).executeCommand(cmd.getCmd());
  else if (cmd.getType() instanceof CLICommandArchive)
    return new TestMRCLI.ArchiveCmdExecutor(namenode, mrConf).executeCommand(cmd.getCmd());
  else
    return super.execute(cmd);
}
 

import org.apache.hadoop.cli.util.CommandExecutor.Result; //导入依赖的package包/类
/**
 * this method has to be overridden by an ancestor
 */
protected CommandExecutor.Result execute(CLICommand cmd) throws Exception {
  throw new Exception("Unknown type of test command:"+ cmd.getType());
}
 

import org.apache.hadoop.cli.util.CommandExecutor.Result; //导入依赖的package包/类
@Override
protected Result execute(CLICommand cmd) throws Exception {
  return cmd.getExecutor(namenode).executeCommand(cmd.getCmd());
}
 

import org.apache.hadoop.cli.util.CommandExecutor.Result; //导入依赖的package包/类
@Override
protected Result execute(CLICommand cmd) throws Exception {
  return cmd.getExecutor("").executeCommand(cmd.getCmd());
}
 

import org.apache.hadoop.cli.util.CommandExecutor.Result; //导入依赖的package包/类
@Override
protected Result execute(CLICommand cmd) throws Exception {
  return cmd.getExecutor(namenode, conf).executeCommand(cmd.getCmd());
}
 

import org.apache.hadoop.cli.util.CommandExecutor.Result; //导入依赖的package包/类
@Override
protected Result execute(CLICommand cmd) throws Exception {
  return cmd.getExecutor("", conf).executeCommand(cmd.getCmd());
}