| /** |
| * 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.arrow.vector; |
| |
| import org.apache.arrow.vector.util.CallBack; |
| |
| |
| public class SchemaChangeCallBack implements CallBack { |
| private boolean schemaChanged = false; |
| |
| /** |
| * Constructs a schema-change callback with the schema-changed state set to |
| * {@code false}. |
| */ |
| public SchemaChangeCallBack() { |
| } |
| |
| /** |
| * Sets the schema-changed state to {@code true}. |
| */ |
| @Override |
| public void doWork() { |
| schemaChanged = true; |
| } |
| |
| /** |
| * Returns the value of schema-changed state, <strong>resetting</strong> the |
| * schema-changed state to {@code false}. |
| */ |
| public boolean getSchemaChangedAndReset() { |
| final boolean current = schemaChanged; |
| schemaChanged = false; |
| return current; |
| } |
| } |
| |