| /* |
| * 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.compress.colgroup.indexes; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.stream.IntStream; |
| |
| import org.apache.sysds.utils.MemoryEstimates; |
| |
| public class ArrayIndex extends AColIndex { |
| private final int[] cols; |
| |
| public ArrayIndex(int[] cols) { |
| this.cols = cols; |
| } |
| |
| @Override |
| public int size() { |
| return cols.length; |
| } |
| |
| @Override |
| public int get(int i) { |
| return cols[i]; |
| } |
| |
| @Override |
| public IColIndex shift(int i) { |
| int[] ret = new int[cols.length]; |
| for(int j = 0; j < cols.length; j++) |
| ret[j] = cols[j] + i; |
| return new ArrayIndex(ret); |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| out.writeByte(ColIndexType.ARRAY.ordinal()); |
| out.writeInt(cols.length); |
| for(int i = 0; i < cols.length; i++) |
| out.writeInt(cols[i]); |
| } |
| |
| public static ArrayIndex read(DataInput in) throws IOException { |
| int size = in.readInt(); |
| int[] cols = new int[size]; |
| for(int i = 0; i < size; i++) |
| cols[i] = in.readInt(); |
| return new ArrayIndex(cols); |
| } |
| |
| @Override |
| public long getExactSizeOnDisk() { |
| return 1 + 4 + 4 * cols.length; |
| } |
| |
| @Override |
| public long estimateInMemorySize() { |
| return estimateInMemorySizeStatic(cols.length); |
| } |
| |
| public static long estimateInMemorySizeStatic(int nCol) { |
| return 16 + (long) MemoryEstimates.intArrayCost(nCol); |
| } |
| |
| @Override |
| public IIterate iterator() { |
| return new ArrayIterator(); |
| } |
| |
| @Override |
| public int findIndex(int i) { |
| return Arrays.binarySearch(cols, i); |
| } |
| |
| @Override |
| public boolean isContiguous() { |
| return false; |
| } |
| |
| @Override |
| public SliceResult slice(int l, int u) { |
| |
| if(l == 0 && u > cols[cols.length - 1]) |
| return new SliceResult(0, cols.length, this); |
| int s = Arrays.binarySearch(cols, l); |
| int e = Arrays.binarySearch(cols, u); |
| |
| s = s < 0 ? Math.abs(s + 1) : s; |
| e = e < 0 ? Math.abs(e + 1) : e; |
| |
| if(s == e) |
| return new SliceResult(0, 0, null); |
| |
| int[] retArr = new int[e - s]; |
| if(l == 0) |
| retArr = Arrays.copyOfRange(cols, s, e); |
| else |
| for(int i = s, j = 0; i < e; i++, j++) |
| retArr[j] = cols[i] - l; |
| |
| SliceResult ret = new SliceResult(s, e, ColIndexFactory.create(retArr)); |
| |
| return ret; |
| } |
| |
| @Override |
| public boolean equals(IColIndex other) { |
| if(other.size() == size()) { |
| if(other instanceof ArrayIndex) { |
| ArrayIndex ot = (ArrayIndex) other; |
| int[] otV = ot.cols; |
| return Arrays.equals(cols, otV); |
| } |
| else if(other instanceof RangeIndex) |
| return other.get(0) == cols[0] && other.get(size() - 1) == cols[size() - 1]; |
| else { // generic |
| for(int i = 0; i < size(); i++) |
| if(other.get(i) != cols[i]) |
| return false; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public IColIndex combine(IColIndex other) { |
| final int sr = other.size(); |
| final int sl = size(); |
| final int[] ret = new int[sr + sl]; |
| int pl = 0; |
| int pr = 0; |
| int i = 0; |
| while(pl < sl && pr < sr) { |
| final int vl = get(pl); |
| final int vr = other.get(pr); |
| if(vl < vr) { |
| ret[i++] = vl; |
| pl++; |
| } |
| else { |
| ret[i++] = vr; |
| pr++; |
| } |
| } |
| while(pl < sl) |
| ret[i++] = get(pl++); |
| while(pr < sr) |
| ret[i++] = other.get(pr++); |
| return ColIndexFactory.create(ret); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(this.getClass().getSimpleName()); |
| sb.append(Arrays.toString(cols)); |
| return sb.toString(); |
| } |
| |
| @Override |
| public int[] getReorderingIndex() { |
| int[] sortedIndices = IntStream.range(0, cols.length).boxed()// |
| .sorted((i, j) -> Integer.valueOf(cols[i]).compareTo(cols[j]))// |
| .mapToInt(ele -> ele).toArray(); |
| return sortedIndices; |
| } |
| |
| @Override |
| public boolean isSorted() { |
| for(int i = 1; i < cols.length; i++) |
| if(cols[i - 1] > cols[i]) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public IColIndex sort() { |
| int[] ret = new int[cols.length]; |
| System.arraycopy(cols, 0, ret, 0, cols.length); |
| Arrays.sort(ret); |
| return ColIndexFactory.create(ret); |
| } |
| |
| @Override |
| public boolean contains(int i) { |
| int id = Arrays.binarySearch(cols, 0, cols.length, i); |
| return id >= 0; |
| } |
| |
| protected class ArrayIterator implements IIterate { |
| int id = 0; |
| |
| @Override |
| public int next() { |
| return cols[id++]; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return id < cols.length; |
| } |
| |
| @Override |
| public int v() { |
| return cols[id]; |
| } |
| |
| @Override |
| public int i() { |
| return id; |
| } |
| } |
| } |