org.apache.trevni

Class ColumnValues<T extends Comparable>

java.lang.Object

org.apache.trevni.ColumnValues<T>

All Implemented Interfaces:

Iterable<T>, Iterator<T>

public class ColumnValues<T extends Comparable>
extends Object
implements Iterator<T>, Iterable<T>

An iterator over column values.

Method Summary

Methods

Modifier and Type	Method and Description
long	getRow() Return the current row number within this file.
boolean	hasNext()
Iterator	iterator()
T	next()
int	nextLength() Expert: Returns the next length in an array column.
T	nextValue() Expert: Returns the next value in a column.
void	remove()
void	seek(long r) Seek to the named row.
void	seek(T v) Seek to the named value.
void	startRow() Expert: Must be called before any calls to nextLength() or nextValue().

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getRow

public long getRow()

Return the current row number within this file.

seek

public void seek(long r)
          throws IOException

Seek to the named row.

Throws:

IOException

seek

public void seek(T v)
          throws IOException

Seek to the named value.

Throws:

IOException

iterator

public Iterator iterator()

Specified by:

iterator in interface Iterable<T extends Comparable>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T extends Comparable>

next

public T next()

Specified by:

next in interface Iterator<T extends Comparable>

startRow

public void startRow()
              throws IOException

Expert: Must be called before any calls to nextLength() or nextValue().

Throws:

IOException

nextLength

public int nextLength()
               throws IOException

Expert: Returns the next length in an array column.

Throws:

IOException

nextValue

public T nextValue()
                               throws IOException

Expert: Returns the next value in a column.

Throws:

IOException

remove

public void remove()

Specified by:

remove in interface Iterator<T extends Comparable>