| /* |
| * 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.accumulo.core.iterators.aggregation; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.hadoop.io.WritableUtils; |
| |
| /** |
| * @deprecated since 1.4, replaced by {@link org.apache.accumulo.core.iterators.user.SummingArrayCombiner} with |
| * {@link org.apache.accumulo.core.iterators.user.SummingArrayCombiner.Type#VARLEN} |
| */ |
| @Deprecated |
| public class NumArraySummation implements Aggregator { |
| long[] sum = new long[0]; |
| |
| @Override |
| public Value aggregate() { |
| try { |
| return new Value(NumArraySummation.longArrayToBytes(sum)); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public void collect(Value value) { |
| long[] la; |
| try { |
| la = NumArraySummation.bytesToLongArray(value.get()); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| |
| if (la.length > sum.length) { |
| for (int i = 0; i < sum.length; i++) { |
| la[i] = NumSummation.safeAdd(la[i], sum[i]); |
| } |
| sum = la; |
| } else { |
| for (int i = 0; i < la.length; i++) { |
| sum[i] = NumSummation.safeAdd(sum[i], la[i]); |
| } |
| } |
| } |
| |
| public static byte[] longArrayToBytes(long[] la) throws IOException { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| DataOutputStream dos = new DataOutputStream(baos); |
| |
| WritableUtils.writeVInt(dos, la.length); |
| for (int i = 0; i < la.length; i++) { |
| WritableUtils.writeVLong(dos, la[i]); |
| } |
| |
| return baos.toByteArray(); |
| } |
| |
| public static long[] bytesToLongArray(byte[] b) throws IOException { |
| DataInputStream dis = new DataInputStream(new ByteArrayInputStream(b)); |
| int len = WritableUtils.readVInt(dis); |
| |
| long[] la = new long[len]; |
| |
| for (int i = 0; i < len; i++) { |
| la[i] = WritableUtils.readVLong(dis); |
| } |
| |
| return la; |
| } |
| |
| @Override |
| public void reset() { |
| sum = new long[0]; |
| } |
| |
| } |