How to use

getAlias

method

in

co.cask.cdap.api.data.batch.Input

private Input suffixInput(Input input) {
 String suffixedAlias = String.format("%s-%s", input.getAlias(), UUID.randomUUID());
 return input.alias(suffixedAlias);
}

@Override
public void addInput(Input input, @Nullable Class<?> mapperCls) {
 if (input.getNamespace() != null && input.getNamespace().equals(NamespaceId.SYSTEM.getNamespace())
  && !getProgram().getNamespaceId().equals(NamespaceId.SYSTEM.getNamespace())) {
  // trying to access system namespace from a program outside system namespace is not allowed
  throw new IllegalArgumentException(String.format("Accessing Input %s in system namespace " +
                            "is not allowed from the namespace %s",
                           input.getName(), getProgram().getNamespaceId()));
 }
 if (input instanceof Input.DatasetInput) {
  Input.DatasetInput datasetInput = (Input.DatasetInput) input;
  Input.InputFormatProviderInput createdInput = createInput(datasetInput);
  addInput(createdInput.getAlias(), createdInput.getInputFormatProvider(), mapperCls);
 } else if (input instanceof Input.InputFormatProviderInput) {
  addInput(input.getAlias(), ((Input.InputFormatProviderInput) input).getInputFormatProvider(), mapperCls);
 } else {
  // shouldn't happen unless user defines their own Input class
  throw new IllegalArgumentException(String.format("Input %s has unknown input class %s",
                           input.getName(), input.getClass().getCanonicalName()));
 }
}

@Override
public void addInput(Input input, @Nullable Class<?> mapperCls) {
 if (input.getNamespace() != null && input.getNamespace().equals(NamespaceId.SYSTEM.getNamespace())
  && !getProgram().getNamespaceId().equals(NamespaceId.SYSTEM.getNamespace())) {
  // trying to access system namespace from a program outside system namespace is not allowed
  throw new IllegalArgumentException(String.format("Accessing Input %s in system namespace " +
                            "is not allowed from the namespace %s",
                           input.getName(), getProgram().getNamespaceId()));
 }
 if (input instanceof Input.DatasetInput) {
  Input.DatasetInput datasetInput = (Input.DatasetInput) input;
  Input.InputFormatProviderInput createdInput = createInput(datasetInput);
  addInput(createdInput.getAlias(), createdInput.getInputFormatProvider(), mapperCls);
 } else if (input instanceof Input.StreamInput) {
  Input.StreamInput streamInput = (Input.StreamInput) input;
  String namespace = streamInput.getNamespace();
  if (namespace == null) {
   namespace = getProgram().getNamespaceId();
  }
  addInput(input.getAlias(),
       new StreamInputFormatProvider(new NamespaceId(namespace), streamInput, streamAdmin),
       mapperCls);
 } else if (input instanceof Input.InputFormatProviderInput) {
  addInput(input.getAlias(), ((Input.InputFormatProviderInput) input).getInputFormatProvider(), mapperCls);
 } else {
  // shouldn't happen unless user defines their own Input class
  throw new IllegalArgumentException(String.format("Input %s has unknown input class %s",
                           input.getName(), input.getClass().getCanonicalName()));
 }
}