How to use

getInputFormatClass

method

in

org.apache.hadoop.mapreduce.Mapper$Context

public void setup(Context context) 
  throws IOException, InterruptedException {
 Configuration conf = context.getConfiguration();
 this.fieldSeparator = 
  conf.get(FieldSelectionHelper.DATA_FIELD_SEPERATOR, "\t");
 this.mapOutputKeyValueSpec = 
  conf.get(FieldSelectionHelper.MAP_OUTPUT_KEY_VALUE_SPEC, "0-:");
 try {
  this.ignoreInputKey = TextInputFormat.class.getCanonicalName().equals(
   context.getInputFormatClass().getCanonicalName());
 } catch (ClassNotFoundException e) {
  throw new IOException("Input format class not found", e);
 }
 allMapValueFieldsFrom = FieldSelectionHelper.parseOutputKeyValueSpec(
  mapOutputKeyValueSpec, mapOutputKeyFieldList, mapOutputValueFieldList);
 LOG.info(FieldSelectionHelper.specToString(fieldSeparator,
  mapOutputKeyValueSpec, allMapValueFieldsFrom, mapOutputKeyFieldList,
  mapOutputValueFieldList) + "\nignoreInputKey:" + ignoreInputKey);
}

public void setup(Context context) 
  throws IOException, InterruptedException {
 Configuration conf = context.getConfiguration();
 this.fieldSeparator = 
  conf.get(FieldSelectionHelper.DATA_FIELD_SEPERATOR, "\t");
 this.mapOutputKeyValueSpec = 
  conf.get(FieldSelectionHelper.MAP_OUTPUT_KEY_VALUE_SPEC, "0-:");
 try {
  this.ignoreInputKey = TextInputFormat.class.getCanonicalName().equals(
   context.getInputFormatClass().getCanonicalName());
 } catch (ClassNotFoundException e) {
  throw new IOException("Input format class not found", e);
 }
 allMapValueFieldsFrom = FieldSelectionHelper.parseOutputKeyValueSpec(
  mapOutputKeyValueSpec, mapOutputKeyFieldList, mapOutputValueFieldList);
 LOG.info(FieldSelectionHelper.specToString(fieldSeparator,
  mapOutputKeyValueSpec, allMapValueFieldsFrom, mapOutputKeyFieldList,
  mapOutputValueFieldList) + "\nignoreInputKey:" + ignoreInputKey);
}

public void setup(Context context) 
  throws IOException, InterruptedException {
 Configuration conf = context.getConfiguration();
 this.fieldSeparator = 
  conf.get(FieldSelectionHelper.DATA_FIELD_SEPERATOR, "\t");
 this.mapOutputKeyValueSpec = 
  conf.get(FieldSelectionHelper.MAP_OUTPUT_KEY_VALUE_SPEC, "0-:");
 try {
  this.ignoreInputKey = TextInputFormat.class.getCanonicalName().equals(
   context.getInputFormatClass().getCanonicalName());
 } catch (ClassNotFoundException e) {
  throw new IOException("Input format class not found", e);
 }
 allMapValueFieldsFrom = FieldSelectionHelper.parseOutputKeyValueSpec(
  mapOutputKeyValueSpec, mapOutputKeyFieldList, mapOutputValueFieldList);
 LOG.info(FieldSelectionHelper.specToString(fieldSeparator,
  mapOutputKeyValueSpec, allMapValueFieldsFrom, mapOutputKeyFieldList,
  mapOutputValueFieldList) + "\nignoreInputKey:" + ignoreInputKey);
}

public void setup(Context context) 
  throws IOException, InterruptedException {
 Configuration conf = context.getConfiguration();
 this.fieldSeparator = 
  conf.get(FieldSelectionHelper.DATA_FIELD_SEPERATOR, "\t");
 this.mapOutputKeyValueSpec = 
  conf.get(FieldSelectionHelper.MAP_OUTPUT_KEY_VALUE_SPEC, "0-:");
 try {
  this.ignoreInputKey = TextInputFormat.class.getCanonicalName().equals(
   context.getInputFormatClass().getCanonicalName());
 } catch (ClassNotFoundException e) {
  throw new IOException("Input format class not found", e);
 }
 allMapValueFieldsFrom = FieldSelectionHelper.parseOutputKeyValueSpec(
  mapOutputKeyValueSpec, mapOutputKeyFieldList, mapOutputValueFieldList);
 LOG.info(FieldSelectionHelper.specToString(fieldSeparator,
  mapOutputKeyValueSpec, allMapValueFieldsFrom, mapOutputKeyFieldList,
  mapOutputValueFieldList) + "\nignoreInputKey:" + ignoreInputKey);
}

public void setup(Context context) 
  throws IOException, InterruptedException {
 Configuration conf = context.getConfiguration();
 this.fieldSeparator = 
  conf.get(FieldSelectionHelper.DATA_FIELD_SEPERATOR, "\t");
 this.mapOutputKeyValueSpec = 
  conf.get(FieldSelectionHelper.MAP_OUTPUT_KEY_VALUE_SPEC, "0-:");
 try {
  this.ignoreInputKey = TextInputFormat.class.getCanonicalName().equals(
   context.getInputFormatClass().getCanonicalName());
 } catch (ClassNotFoundException e) {
  throw new IOException("Input format class not found", e);
 }
 allMapValueFieldsFrom = FieldSelectionHelper.parseOutputKeyValueSpec(
  mapOutputKeyValueSpec, mapOutputKeyFieldList, mapOutputValueFieldList);
 LOG.info(FieldSelectionHelper.specToString(fieldSeparator,
  mapOutputKeyValueSpec, allMapValueFieldsFrom, mapOutputKeyFieldList,
  mapOutputValueFieldList) + "\nignoreInputKey:" + ignoreInputKey);
}

@Override
protected void setup(Context context) throws IOException, InterruptedException {
 // assert that the user gets FileInputSplit (as opposed to the MultiInputTaggedSplit) from the context
 Preconditions.checkArgument(context.getInputSplit() instanceof FileSplit);
 try {
  // assert that the user gets the TextInputFormat, as opposed to the MultiInputFormat from the context
  Preconditions.checkArgument(context.getInputFormatClass() == TextInputFormat.class);
 } catch (ClassNotFoundException e) {
  Throwables.propagate(e);
 }
}