jkosh44 commented on a change in pull request #952: [WIP] Issue 946 URL: https://github.com/apache/fluo/pull/952#discussion_r146153784
########## File path: modules/accumulo/src/main/java/org/apache/fluo/accumulo/iterators/ColumnBuffer.java ########## @@ -0,0 +1,95 @@ +/* + * 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.fluo.accumulo.iterators; + +import java.util.ArrayList; +import java.util.function.LongPredicate; + +import org.apache.accumulo.core.data.Key; +import org.apache.accumulo.core.data.Value; + +/** + * This class buffers Keys that all have the same row+column. Internally + * it only stores one Key, a list of timestamps and a list of values. At iteration + * time it materializes each Key+Value. + */ +class ColumnBuffer { + + private Key key; + private ArrayList<Long> timeStamps; + private ArrayList<Value> values; + private int size; + + public ColumnBuffer() { + + this.key = null; + this.timeStamps = new ArrayList<>(); + this.values = new ArrayList<>(); + size = 0; + } + + /** + * When empty, the first key added sets the row+column. After this all keys + * added must have the same row+column. + */ + public void add(Key k, Value v) { + + if (key == null) { + key = k; + timeStamps.add(k.getTimestamp()); + values.add(v); + size++; + } else if (key.compareRow(k.getRow()) == 0 + && key.compareColumnFamily(k.getColumnFamily()) == 0) { + timeStamps.add(k.getTimestamp()); + values.add(v); + } else { + //TODO: what happens here Review comment: What should happen when someone tries to add a Key Value pair that's different from the Key already assigned to the buffer? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
