| /* |
| * 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.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.sysds.runtime.compress.DMLCompressionException; |
| |
| public class SingleIndex extends AColIndex { |
| private final int idx; |
| |
| public SingleIndex(int idx) { |
| this.idx = idx; |
| } |
| |
| @Override |
| public int size() { |
| return 1; |
| } |
| |
| @Override |
| public int get(int i) { |
| return idx; |
| } |
| |
| @Override |
| public SingleIndex shift(int i) { |
| return new SingleIndex(i + idx); |
| } |
| |
| @Override |
| public IIterate iterator() { |
| return new SingleIterator(); |
| } |
| |
| public void write(DataOutput out) throws IOException { |
| out.writeByte(ColIndexType.SINGLE.ordinal()); |
| out.writeInt(idx); |
| } |
| |
| @Override |
| public long getExactSizeOnDisk() { |
| return 1 + 4; |
| } |
| |
| @Override |
| public long estimateInMemorySize() { |
| return estimateInMemorySizeStatic(); |
| } |
| |
| public static long estimateInMemorySizeStatic() { |
| return 16 + 4 + 4; // object, int, and padding |
| } |
| |
| @Override |
| public int findIndex(int i) { |
| if(i < idx) |
| return -1; |
| else if(i == idx) |
| return 0; |
| else |
| return -2; |
| } |
| |
| @Override |
| public SliceResult slice(int l, int u) { |
| return (l <= idx && u > idx) // |
| ? l == 0 ? new SliceResult(0, 1, this) : new SliceResult(0, 1, new SingleIndex(idx - l)) // |
| : new SliceResult(0, 0, null); |
| } |
| |
| @Override |
| public boolean equals(IColIndex other) { |
| return other.size() == 1 && other.get(0) == idx; |
| } |
| |
| @Override |
| public IColIndex combine(IColIndex other) { |
| if(other instanceof SingleIndex) { |
| int otherV = other.get(0); |
| if(otherV < idx) |
| return new TwoIndex(otherV, idx); |
| else |
| return new TwoIndex(idx, otherV); |
| } |
| else |
| return other.combine(this); |
| } |
| |
| @Override |
| public boolean isContiguous() { |
| return true; |
| } |
| |
| @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"); |
| } |
| |
| @Override |
| public boolean contains(int i) { |
| return i == idx; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(this.getClass().getSimpleName()); |
| sb.append("["); |
| sb.append(idx); |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| protected class SingleIterator implements IIterate { |
| boolean taken = false; |
| |
| @Override |
| public int next() { |
| taken = true; |
| return idx; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return !taken; |
| } |
| |
| @Override |
| public int v() { |
| return idx; |
| } |
| |
| @Override |
| public int i() { |
| return 0; |
| } |
| } |
| |
| } |