AggregatorTests.java
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上传日期:2018-01-08
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文件大小:3k
- /**
- * 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.hadoop.mapred.lib.aggregate;
- import org.apache.hadoop.io.Text;
- import java.util.ArrayList;
- import java.util.Map.Entry;
- public class AggregatorTests extends ValueAggregatorBaseDescriptor {
-
- public ArrayList<Entry<Text, Text>> generateKeyValPairs(Object key, Object val) {
- ArrayList<Entry<Text, Text>> retv = new ArrayList<Entry<Text, Text>>();
- String [] words = val.toString().split(" ");
-
- String countType;
- String id;
- Entry<Text, Text> e;
-
- for (String word: words) {
- long numVal = Long.parseLong(word);
- countType = LONG_VALUE_SUM;
- id = "count_" + word;
- e = generateEntry(countType, id, ONE);
- if (e != null) {
- retv.add(e);
- }
- countType = LONG_VALUE_MAX;
- id = "max";
- e = generateEntry(countType, id, new Text(word));
- if (e != null) {
- retv.add(e);
- }
-
- countType = LONG_VALUE_MIN;
- id = "min";
- e = generateEntry(countType, id, new Text(word));
- if (e != null) {
- retv.add(e);
- }
-
- countType = STRING_VALUE_MAX;
- id = "value_as_string_max";
- e = generateEntry(countType, id, new Text(""+numVal));
- if (e != null) {
- retv.add(e);
- }
-
- countType = STRING_VALUE_MIN;
- id = "value_as_string_min";
- e = generateEntry(countType, id, new Text(""+numVal));
- if (e != null) {
- retv.add(e);
- }
-
- countType = UNIQ_VALUE_COUNT;
- id = "uniq_count";
- e = generateEntry(countType, id, new Text(word));
- if (e != null) {
- retv.add(e);
- }
-
- countType = VALUE_HISTOGRAM;
- id = "histogram";
- e = generateEntry(countType, id, new Text(word));
- if (e != null) {
- retv.add(e);
- }
- }
- return retv;
- }
- }