visad.data.netcdf.in
Class FlatMerger

java.lang.Object
  visad.data.netcdf.in.Merger
      visad.data.netcdf.in.FlatMerger

public class FlatMerger
extends Merger

Provides support for merging of virtual data objects. This class maximizes the number of virtual flat-fields by not merging them. Consequently, this class supports a FileFlatField caching strategy.

Author:

Steven R. Emmerson

Constructor Summary

protected

FlatMerger() Constructs from nothing.

Method Summary

static Merger	instance() Returns an instance of this class.
protected VirtualField	merge(VirtualFlatField field1, VirtualField field2) Does not merge a virtual flat-field with a virtual field.
protected VirtualFlatField	merge(VirtualFlatField field1, VirtualFlatField field2) Does not merge a virtual flat-field with another virtual flat-field.

Methods inherited from class visad.data.netcdf.in.Merger

merge, merge, merge, merge, merge, merge

Methods inherited from class java.lang.Object

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

Constructor Detail

FlatMerger

protected FlatMerger()

Constructs from nothing.

Method Detail

instance

public static Merger instance()

Returns an instance of this class.

Returns:

An instance of this class.

merge

protected VirtualField merge(VirtualFlatField field1,
                             VirtualField field2)
                      throws VisADException

Does not merge a virtual flat-field with a virtual field.

Overrides:

merge in class Merger

Parameters:

field1 - The virtual flat-field.

field2 - The virtual field.

Returns:

A virtual field comprising the merger of the input objects if possible; otherwise null. throws VisADException VisAD failure.

Throws:

VisADException

See Also:

Merger.merge(VirtualField, VirtualField)

merge

protected VirtualFlatField merge(VirtualFlatField field1,
                                 VirtualFlatField field2)
                          throws VisADException

Does not merge a virtual flat-field with another virtual flat-field.

Overrides:

merge in class Merger

Parameters:

field1 - The virtual flat-field.

field2 - The other virtual flat-field.

Returns:

A virtual flat-field comprising the merger of the input objects if possible; otherwise null. May be field1. throws VisADException VisAD failure.

Throws:

VisADException

See Also:

merge(VirtualFlatField, VirtualFlatField)