| /** |
| * 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.jena.sparql.core; |
| |
| import org.apache.jena.graph.Node ; |
| |
| /** Count changes, or simply note if a change has been made. */ |
| public class DatasetChangesCounter implements DatasetChanges |
| { |
| long countStart = 0 ; |
| long countFinish = 0 ; |
| |
| long countAdd = 0 ; |
| long countDelete = 0 ; |
| long countNoAdd = 0 ; |
| long countNoDelete = 0 ; |
| |
| @Override |
| public void start() { |
| countStart++ ; |
| } |
| |
| @Override |
| public void change(QuadAction qaction, Node g, Node s, Node p, Node o) { |
| if ( qaction == null ) |
| throw new NullPointerException() ; |
| switch (qaction) { |
| case ADD: countAdd++ ; break ; |
| case DELETE: countDelete++ ; break ; |
| case NO_ADD: countNoAdd++ ; break ; |
| case NO_DELETE: countNoDelete++ ; break ; |
| //default : break ; |
| } |
| } |
| |
| @Override |
| public void finish() { |
| countFinish++ ; |
| } |
| |
| public boolean hasChanged() { |
| return countAdd > 0 || countDelete > 0 ; |
| } |
| |
| @Override |
| public void reset() { |
| countStart = 0 ; |
| countFinish = 0 ; |
| |
| countAdd = 0 ; |
| countDelete = 0 ; |
| countNoAdd = 0 ; |
| countNoDelete = 0 ; |
| } |
| } |
| |