| /* |
| * 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 org.apache.sysds.runtime.compress.DMLCompressionException; |
| import org.apache.sysds.runtime.compress.utils.IntArrayList; |
| |
| public class RangeIndex extends AColIndex { |
| private final int l; |
| private final int u; // not inclusive |
| |
| public RangeIndex(int nCol) { |
| l = 0; |
| u = nCol; |
| } |
| |
| public RangeIndex(int l, int u) { |
| this.l = l; |
| this.u = u; |
| } |
| |
| @Override |
| public int size() { |
| return u - l; |
| } |
| |
| @Override |
| public int get(int i) { |
| return l + i; |
| } |
| |
| @Override |
| public IColIndex shift(int i) { |
| return new RangeIndex(l + i, u + i); |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| out.writeByte(ColIndexType.RANGE.ordinal()); |
| out.writeInt(l); |
| out.writeInt(u); |
| } |
| |
| public static RangeIndex read(DataInput in) throws IOException { |
| int l = in.readInt(); |
| int u = in.readInt(); |
| return new RangeIndex(l, u); |
| } |
| |
| @Override |
| public long getExactSizeOnDisk() { |
| return 1 + 4 + 4; |
| } |
| |
| @Override |
| public long estimateInMemorySize() { |
| return estimateInMemorySizeStatic(); |
| } |
| |
| public static long estimateInMemorySizeStatic() { |
| return 16 + 8; |
| } |
| |
| @Override |
| public IIterate iterator() { |
| return new RangeIterator(); |
| } |
| |
| @Override |
| public int findIndex(int i) { |
| if(i < l) |
| return -1; |
| else if(i < u) |
| return i - l; |
| else |
| return -1 * u - 1 + l; |
| } |
| |
| @Override |
| public SliceResult slice(int l, int u) { |
| |
| if(u <= this.l) |
| return new SliceResult(0, 0, null); |
| else if(l >= this.u) |
| return new SliceResult(0, 0, null); |
| else if(l <= this.l && u >= this.u) |
| return new SliceResult(0, size(), new RangeIndex(this.l - l, this.u - l)); |
| else { |
| int offL = Math.max(l, this.l) - this.l; |
| int offR = Math.min(u, this.u) - this.l; |
| return new SliceResult(offL, offR, new RangeIndex(Math.max(l, this.l) - l, Math.min(u, this.u) - l)); |
| } |
| } |
| |
| @Override |
| public boolean equals(IColIndex other) { |
| if(other instanceof RangeIndex) { |
| RangeIndex ot = (RangeIndex) other; |
| return ot.l == l && ot.u == u; |
| } |
| else |
| return other.equals(this); |
| } |
| |
| @Override |
| public IColIndex combine(IColIndex other) { |
| if(other.size() == 1) { |
| int v = other.get(0); |
| if(v + 1 == l) |
| return new RangeIndex(l - 1, u); |
| else if(v == u) |
| return new RangeIndex(l, u + 1); |
| } |
| |
| 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 boolean isContiguous() { |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(this.getClass().getSimpleName()); |
| sb.append("["); |
| sb.append(l); |
| sb.append(" -> "); |
| sb.append(u); |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| protected static boolean isValidRange(int[] indexes) { |
| return isValidRange(indexes, indexes.length); |
| } |
| |
| protected static boolean isValidRange(IntArrayList indexes) { |
| return isValidRange(indexes.extractValues(), indexes.size()); |
| } |
| |
| private static boolean isValidRange(final int[] indexes, final int length) { |
| int len = length; |
| int first = indexes[0]; |
| int last = indexes[length - 1]; |
| if(last - first + 1 == len) { |
| for(int i = 1; i < length; i++) |
| if(indexes[i - 1] > indexes[i]) |
| return false; |
| return true; |
| } |
| else |
| return false; |
| } |
| |
| @Override |
| public int[] getReorderingIndex() { |
| throw new DMLCompressionException("not valid to get reordering Index for range"); |
| } |
| |
| @Override |
| public boolean isSorted() { |
| return true; |
| } |
| |
| @Override |
| public IColIndex sort() { |
| throw new DMLCompressionException("range is always sorted"); |
| } |
| |
| protected class RangeIterator implements IIterate { |
| int cl = l; |
| |
| @Override |
| public int next() { |
| return cl++; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return cl < u; |
| } |
| |
| @Override |
| public int v() { |
| return cl; |
| } |
| |
| @Override |
| public int i() { |
| return cl - l; |
| } |
| } |
| } |