| package org.apache.lucene.store; |
| |
| /** |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.store.SimpleFSDirectory.SimpleFSIndexInput; |
| |
| /** This class provides access to package-level features defined in the |
| * store package. It is used for testing only. |
| */ |
| public class _TestHelper { |
| |
| /** Returns true if the instance of the provided input stream is actually |
| * an SimpleFSIndexInput. |
| */ |
| public static boolean isSimpleFSIndexInput(IndexInput is) { |
| return is instanceof SimpleFSIndexInput; |
| } |
| |
| /** Returns true if the provided input stream is an SimpleFSIndexInput and |
| * is a clone, that is it does not own its underlying file descriptor. |
| */ |
| public static boolean isSimpleFSIndexInputClone(IndexInput is) { |
| if (isSimpleFSIndexInput(is)) { |
| return ((SimpleFSIndexInput) is).isClone; |
| } else { |
| return false; |
| } |
| } |
| |
| /** Given an instance of SimpleFSDirectory.SimpleFSIndexInput, this method returns |
| * true if the underlying file descriptor is valid, and false otherwise. |
| * This can be used to determine if the OS file has been closed. |
| * The descriptor becomes invalid when the non-clone instance of the |
| * SimpleFSIndexInput that owns this descriptor is closed. However, the |
| * descriptor may possibly become invalid in other ways as well. |
| */ |
| public static boolean isSimpleFSIndexInputOpen(IndexInput is) |
| throws IOException |
| { |
| if (isSimpleFSIndexInput(is)) { |
| SimpleFSIndexInput fis = (SimpleFSIndexInput) is; |
| return fis.isFDValid(); |
| } else { |
| return false; |
| } |
| } |
| |
| } |