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/*
* Copyright 2007 - 2018 ETH Zuerich, CISD and SIS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.systemsx.cisd.hdf5;
import ch.systemsx.cisd.base.mdarray.MDAbstractArray;
/**
* A class that is used for iterating over a data set block by block, using
* <em>natural data blocks</em>. The <em>Natural block</em> for chunked data sets is a chunk, for
* non-chunked data sets it is the complete array.
* <p>
* The pattern for using this class is:
*
* <pre>
* for (HDF5DataBlock<MDIntArray> block : reader.getIntMDNaturalBlocks(dsNameMD))
* {
* MDIntArray naturalBlock = block.getData();
* ... work on naturalBlock, use block.getIndex() or block.getOffset() where needed ...
* }
* </pre>
*
* The iteration in the multi-dimensional case will be in C-order, that is last-index is iterated
* over first.
* <p>
* <b>Note:</b> If the size of the data set is not an integer number of blocks, then the last block
* will be smaller than the natural block size.
*
* @author Bernd Rinn
*/
public class HDF5MDDataBlock<T extends MDAbstractArray<?>>
{
private final T data;
private final long[] offset;
private final long[] index;
HDF5MDDataBlock(T block, long[] index, long[] offset)
{
this.data = block;
this.index = index;
this.offset = offset;
}
/**
* Returns the data block itself.
*/
public T getData()
{
return data;
}
/**
* Returns the offset in the data set for the current iteration in each dimension.
*/
public long[] getOffset()
{
return offset;
}
/**
* Returns the iteration index of this block, starting with <code>{ 0, ..., 0 }</code>.
*/
public long[] getIndex()
{
return index;
}
}
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