| /* |
| * 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.oodt.product.handlers.ofsn; |
| |
| //JDK imports |
| import java.io.File; |
| import java.io.FileFilter; |
| import java.util.List; |
| import java.util.Properties; |
| import java.util.Stack; |
| import java.util.Vector; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| //OODT imports |
| import org.apache.oodt.product.ProductException; |
| |
| /** |
| * |
| * An abstract {@link OFSNListHandler} for generating file lists based on two |
| * simple flags: recurse, and crawlForDirs, indicating to crawl for directories |
| * rather than files. |
| * |
| * @author mattmann |
| * @version $Revision$ |
| * |
| */ |
| public abstract class AbstractCrawlLister implements OFSNListHandler { |
| |
| protected final static Logger LOG = Logger |
| .getLogger(AbstractCrawlLister.class.getName()); |
| |
| protected static final FileFilter FILE_FILTER = new FileFilter() { |
| public boolean accept(File pathname) { |
| if (pathname.isFile()) { |
| return true; |
| } else |
| return false; |
| } |
| }; |
| |
| protected static final FileFilter DIR_FILTER = new FileFilter() { |
| public boolean accept(File pathname) { |
| if (pathname.isDirectory()) { |
| return true; |
| } else |
| return false; |
| } |
| }; |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.apache.oodt.product.handlers.ofsn.OFSNListHandler#configure(java. |
| * util.Properties) |
| */ |
| public abstract void configure(Properties conf); |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.apache.oodt.product.handlers.ofsn.OFSNListHandler#getListing(java |
| * .lang.String) |
| */ |
| public abstract File[] getListing(String ofsn) throws ProductException; |
| |
| protected File[] crawlFiles(File dirRoot, boolean recur, |
| boolean crawlForDirs) { |
| if (dirRoot == null || ((dirRoot != null && !dirRoot.exists()))) |
| throw new IllegalArgumentException("dir root: [" + dirRoot |
| + "] is null or non existant!"); |
| |
| List<File> fileList = new Vector<File>(); |
| |
| // start crawling |
| Stack<File> stack = new Stack<File>(); |
| stack.push(dirRoot.isDirectory() ? dirRoot : dirRoot.getParentFile()); |
| while (!stack.isEmpty()) { |
| File dir = (File) stack.pop(); |
| LOG.log(Level.INFO, "OFSN: Crawling " + dir); |
| |
| File[] productFiles = null; |
| if (crawlForDirs) { |
| productFiles = dir.listFiles(DIR_FILTER); |
| } else { |
| productFiles = dir.listFiles(FILE_FILTER); |
| } |
| |
| for (int j = 0; j < productFiles.length; j++) { |
| fileList.add(productFiles[j]); |
| } |
| |
| if (recur) { |
| File[] subdirs = dir.listFiles(DIR_FILTER); |
| if (subdirs != null) |
| for (int j = 0; j < subdirs.length; j++) |
| stack.push(subdirs[j]); |
| } |
| } |
| |
| return fileList.toArray(new File[fileList.size()]); |
| } |
| |
| } |