org.apache.pig
Class FilterFunc
java.lang.Object
org.apache.pig.FilterFunc
- Direct Known Subclasses:
- IsEmpty
public abstract class FilterFunc
- extends Object
Method Summary |
abstract boolean |
exec(Tuple input)
This callback method must be implemented by all subclasses. |
void |
finish()
Placeholder for cleanup to be performed at the end. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
FilterFunc
public FilterFunc()
exec
public abstract boolean exec(Tuple input)
throws IOException
- This callback method must be implemented by all subclasses. This
is the method that will be invoked on every Tuple of a given dataset.
Since the dataset may be divided up in a variety of ways the programmer
should not make assumptions about state that is maintained between
invocations of this method.
- Parameters:
input
- the Tuple to be processed.
- Throws:
IOException
finish
public void finish()
- Placeholder for cleanup to be performed at the end. User defined functions can override.
Copyright © ${year} The Apache Software Foundation