org.das2.qds

Interface QubeDataSetIterator.DimensionIterator

All Known Implementing Classes:

QubeDataSetIterator.IndexListIterator, QubeDataSetIterator.SingletonIterator, QubeDataSetIterator.StartStopStepIterator

Enclosing class:

QubeDataSetIterator

public static interface QubeDataSetIterator.DimensionIterator

DimensionIterator iterates over an index. For example, using Jython for brevity:

 ds= zeros(15,4,2)
 ds[:,:,:] has itertors that count of 0,...,14; 0,...,3; and 0,1
 ds[3:15,:,:]  uses a StartStopStepIterator to count off 3,4,5,...,14
 ds[3,:,:]  uses a SingletonIterator
 i1= [0,1,2,3]
 i2= [0,0,1,1]
 i3= [0,1,0,1]
 ds[i1,i2,i3]  # uses IndexListIterator

When index is called before hasNext, it must return -1 to indicate an uninitialized state.

Method Summary

Modifier and Type	Method and Description
boolean	hasNext() true if there are more indices in the iteration
int	index() return the current index.
int	length() return the length of the iteration.
int	nextIndex() return the next index of the iteration

Method Detail

hasNext

boolean hasNext()

true if there are more indices in the iteration

Returns:

true if there are more indices in the iteration

nextIndex

int nextIndex()

return the next index of the iteration

Returns:

the next index of the iteration

index

int index()

return the current index.

Returns:

the current index.

length

int length()

return the length of the iteration.

Returns:

the length of the iteration.