| /* |
| * 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.tuple.arrayofdoubles; |
| |
| /** |
| * Interface for iterating over tuple sketches of type ArrayOfDoubles |
| */ |
| public interface ArrayOfDoublesSketchIterator { |
| /** |
| * Advancing the iterator and checking existence of the next entry |
| * is combined here for efficiency. This results in an undefined |
| * state of the iterator before the first call of this method. |
| * @return true if the next element exists |
| */ |
| public boolean next(); |
| |
| /** |
| * Gets a key from the current entry in the sketch, which is a hash |
| * of the original key passed to update(). The original keys are not |
| * retained. Don't call this before calling next() for the first time |
| * or after getting false from next(). |
| * @return hash key from the current entry |
| */ |
| public long getKey(); |
| |
| /** |
| * Gets an array of values from the current entry in the sketch. |
| * Don't call this before calling next() for the first time |
| * or after getting false from next(). |
| * @return array of double values for the current entry (may or may not be a copy) |
| */ |
| public double[] getValues(); |
| } |