| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.sysds.runtime.transform.decode; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.sysds.common.Types.ValueType; |
| import org.apache.sysds.runtime.matrix.data.FrameBlock; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.util.UtilFunctions; |
| |
| /** |
| * Simple atomic decoder for passing through numeric columns to the output. |
| * This is required for block-wise decoding. |
| * |
| */ |
| public class DecoderPassThrough extends Decoder |
| { |
| private static final long serialVersionUID = -8525203889417422598L; |
| |
| private int[] _dcCols = null; |
| private int[] _srcCols = null; |
| |
| protected DecoderPassThrough(ValueType[] schema, int[] ptCols, int[] dcCols) { |
| super(schema, ptCols); |
| _dcCols = dcCols; |
| } |
| |
| @Override |
| public FrameBlock decode(MatrixBlock in, FrameBlock out) { |
| out.ensureAllocatedColumns(in.getNumRows()); |
| int clen = Math.min(_colList.length, out.getNumColumns()); |
| for( int i=0; i<in.getNumRows(); i++ ) { |
| for( int j=0; j<clen; j++ ) { |
| int srcColID = _srcCols[j]; |
| int tgtColID = _colList[j]; |
| double val = in.quickGetValue(i, srcColID-1); |
| out.set(i, tgtColID-1, |
| UtilFunctions.doubleToObject(_schema[tgtColID-1], val)); |
| } |
| } |
| return out; |
| } |
| |
| @Override |
| public Decoder subRangeDecoder(int colStart, int colEnd, int dummycodedOffset) { |
| List<Integer> colList = new ArrayList<>(); |
| List<Integer> dcList = new ArrayList<>(); |
| List<Integer> srcList = new ArrayList<>(); |
| |
| for (int i = 0; i < _colList.length; i++) { |
| int colID = _colList[i]; |
| if (colID >= colStart && colID < colEnd) { |
| colList.add(colID - (colStart - 1)); |
| srcList.add(_srcCols[i] - dummycodedOffset); |
| } |
| } |
| |
| Arrays.stream(_dcCols) |
| .filter(c -> c >= colStart && c < colEnd) |
| .forEach(c -> dcList.add(c)); |
| |
| if (colList.isEmpty()) |
| // empty decoder -> return null |
| return null; |
| |
| DecoderPassThrough decoder = new DecoderPassThrough(Arrays.copyOfRange(_schema, colStart - 1, colEnd - 1), |
| colList.stream().mapToInt(i -> i).toArray(), |
| dcList.stream().mapToInt(i -> i).toArray()); |
| decoder._srcCols = srcList.stream().mapToInt(i -> i).toArray(); |
| return decoder; |
| } |
| |
| @Override |
| public void initMetaData(FrameBlock meta) { |
| if( _dcCols.length > 0 ) { |
| //prepare source column id mapping w/ dummy coding |
| _srcCols = new int[_colList.length]; |
| int ix1 = 0, ix2 = 0, off = 0; |
| while( ix1<_colList.length ) { |
| if( ix2>=_dcCols.length || _colList[ix1] < _dcCols[ix2] ) { |
| _srcCols[ix1] = _colList[ix1] + off; |
| ix1 ++; |
| } |
| else { //_colList[ix1] > _dcCols[ix2] |
| off += (int)meta.getColumnMetadata()[_dcCols[ix2]-1].getNumDistinct() - 1; |
| ix2 ++; |
| } |
| } |
| } |
| else { |
| //prepare direct source column mapping |
| _srcCols = _colList; |
| } |
| } |
| } |