| /* |
| * Copyright 2016, Yahoo! Inc. |
| * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms. |
| */ |
| |
| package com.yahoo.sketches.pig.quantiles; |
| |
| import java.util.Comparator; |
| |
| import com.yahoo.sketches.ArrayOfItemsSerDe; |
| import com.yahoo.sketches.ArrayOfStringsSerDe; |
| |
| /** |
| * Computes union of ItemsSketch<String>. |
| * It supports all three ways: exec(), Accumulator and Algebraic |
| */ |
| public class UnionStringsSketch extends UnionItemsSketch<String> { |
| |
| private static final Comparator<String> COMPARATOR = Comparator.naturalOrder(); |
| private static final ArrayOfItemsSerDe<String> SER_DE = new ArrayOfStringsSerDe(); |
| |
| public UnionStringsSketch() { |
| super(0, COMPARATOR, SER_DE); |
| } |
| |
| public UnionStringsSketch(final String kStr) { |
| super(Integer.parseInt(kStr), COMPARATOR, SER_DE); |
| } |
| |
| //ALGEBRAIC INTERFACE |
| |
| @Override |
| public String getInitial() { |
| return UnionItemsSketchInitial.class.getName(); |
| } |
| |
| @Override |
| public String getIntermed() { |
| return UnionStringsSketchIntermediateFinal.class.getName(); |
| } |
| |
| @Override |
| public String getFinal() { |
| return UnionStringsSketchIntermediateFinal.class.getName(); |
| } |
| |
| public static class UnionStringsSketchIntermediateFinal extends UnionItemsSketchIntermediateFinal<String> { |
| |
| public UnionStringsSketchIntermediateFinal() { |
| super(0, COMPARATOR, SER_DE); |
| } |
| |
| public UnionStringsSketchIntermediateFinal(final String kStr) { |
| super(Integer.parseInt(kStr), COMPARATOR, SER_DE); |
| } |
| |
| } |
| |
| } |