| /* |
| * 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.datasketches.hive.theta; |
| |
| import org.apache.datasketches.memory.Memory; |
| import org.apache.datasketches.theta.SetOperation; |
| import org.apache.datasketches.theta.Sketch; |
| import org.apache.datasketches.theta.Union; |
| import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AbstractAggregationBuffer; |
| import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils; |
| |
| class UnionState extends AbstractAggregationBuffer { |
| |
| static final float DEFAULT_SAMPLING_PROBABILITY = 1; |
| |
| private int nominalEntries_; |
| private long seed_; |
| private Union union_; |
| |
| public boolean isInitialized() { |
| return this.union_ != null; |
| } |
| |
| // sampling probability is not relevant for merging |
| public void init(final int nominalEntries, final long seed) { |
| init(nominalEntries, UnionState.DEFAULT_SAMPLING_PROBABILITY, seed); |
| } |
| |
| public void init(final int nominalEntries, final float samplingProbability, final long seed) { |
| this.nominalEntries_ = nominalEntries; |
| this.seed_ = seed; |
| this.union_ = SetOperation.builder().setNominalEntries(nominalEntries).setP(samplingProbability) |
| .setSeed(seed).buildUnion(); |
| } |
| |
| public int getNominalEntries() { |
| return this.nominalEntries_; |
| } |
| |
| public long getSeed() { |
| return this.seed_; |
| } |
| |
| public void update(final Memory mem) { |
| this.union_.union(mem); |
| } |
| |
| public void update(final Object value, final PrimitiveObjectInspector objectInspector) { |
| switch (objectInspector.getPrimitiveCategory()) { |
| case BINARY: |
| this.union_.update(PrimitiveObjectInspectorUtils.getBinary(value, objectInspector).copyBytes()); |
| return; |
| case BYTE: |
| this.union_.update(PrimitiveObjectInspectorUtils.getByte(value, objectInspector)); |
| return; |
| case DOUBLE: |
| this.union_.update(PrimitiveObjectInspectorUtils.getDouble(value, objectInspector)); |
| return; |
| case FLOAT: |
| this.union_.update(PrimitiveObjectInspectorUtils.getFloat(value, objectInspector)); |
| return; |
| case INT: |
| this.union_.update(PrimitiveObjectInspectorUtils.getInt(value, objectInspector)); |
| return; |
| case LONG: |
| this.union_.update(PrimitiveObjectInspectorUtils.getLong(value, objectInspector)); |
| return; |
| case STRING: |
| this.union_.update(PrimitiveObjectInspectorUtils.getString(value, objectInspector)); |
| return; |
| case CHAR: |
| this.union_.update(PrimitiveObjectInspectorUtils.getHiveChar(value, objectInspector).getValue()); |
| return; |
| case VARCHAR: |
| this.union_.update(PrimitiveObjectInspectorUtils.getHiveVarchar(value, objectInspector).getValue()); |
| return; |
| default: |
| throw new IllegalArgumentException( |
| "Unrecongnized input data type " + value.getClass().getSimpleName() + " category " |
| + objectInspector.getPrimitiveCategory() + ", please use data of the following types: " |
| + "byte, double, float, int, long, char, varchar or string."); |
| } |
| } |
| |
| public Sketch getResult() { |
| if (this.union_ == null) { return null; } |
| return this.union_.getResult(); |
| } |
| |
| public void reset() { |
| this.union_ = null; |
| } |
| |
| } |