| /* |
| * 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.pig.data; |
| |
| import java.io.File; |
| import java.util.ArrayList; |
| import java.util.LinkedList; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * This class extends ArrayList<File> to add a finalize() that |
| * calls delete on the files . |
| * This helps in getting rid of the finalize() in the classes such |
| * as DefaultAbstractBag, and they can be freed up without waiting |
| * for finalize to be called. Only if those classes have spilled to |
| * disk, there will be a (this) class that needs to be finalized. |
| * |
| * CAUTION: if you assign a new value for a variable of this type, |
| * the files (if any) in the old object it pointed to will be scheduled for |
| * deletion. To avoid that call .clear() before assigning a new value. |
| */ |
| public class FileList extends ArrayList<File> { |
| |
| private static final long serialVersionUID = 1L; |
| private static final Log log = LogFactory.getLog(FileList.class); |
| |
| public FileList(int i) { |
| super(i); |
| } |
| |
| public FileList(){ |
| } |
| |
| public FileList(LinkedList<File> ll) { |
| super(ll); |
| } |
| |
| @Override |
| protected void finalize(){ |
| for(File f : this){ |
| if(f.delete() == false){ |
| log.warn("Failed to delete file: " + f.getPath()); |
| } |
| } |
| } |
| |
| } |