001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.commons.weaver.utils; 020 021import java.io.File; 022import java.net.MalformedURLException; 023import java.net.URL; 024import java.util.ArrayList; 025import java.util.Iterator; 026 027/** 028 * {@link URL} Array utilities. 029 */ 030public final class URLArray { 031 private URLArray() { 032 } 033 034 /** 035 * Convert an {@link Iterable} of filesystem paths. 036 * @param files to convert 037 * @return URL[] 038 */ 039 public static URL[] fromPaths(final Iterable<String> files) { 040 return fromFiles(new Iterable<File>() { 041 042 @Override 043 public Iterator<File> iterator() { 044 final Iterator<String> path = files.iterator(); 045 return new Iterator<File>() { 046 047 @Override 048 public boolean hasNext() { 049 return path.hasNext(); 050 } 051 052 @Override 053 public File next() { 054 final String element = path.next(); 055 return element == null ? null : new File(element); 056 } 057 058 @Override 059 public void remove() { 060 throw new UnsupportedOperationException(); 061 } 062 }; 063 } 064 }); 065 } 066 067 /** 068 * Convert an {@link Iterable} of {@link File}s. 069 * @param files to convert 070 * @return URL[] 071 */ 072 public static URL[] fromFiles(final Iterable<File> files) { 073 final ArrayList<URL> result = new ArrayList<URL>(); 074 for (final File file : files) { 075 if (file == null) { 076 result.add(null); 077 continue; 078 } 079 try { 080 result.add(file.toURI().toURL()); 081 } catch (final MalformedURLException e) { 082 // this shouldn't happen 083 throw new RuntimeException(e); 084 } 085 } 086 return result.toArray(new URL[result.size()]); 087 } 088}