| /* Copyright 2004 The Apache Software Foundation |
| * |
| * Licensed 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.xmlbeans.impl.common; |
| |
| import java.io.*; |
| import java.net.URI; |
| import java.nio.channels.FileChannel; |
| |
| public class IOUtil { |
| public static void copyCompletely(InputStream input, OutputStream output) |
| throws IOException { |
| //if both are file streams, use channel IO |
| if ((output instanceof FileOutputStream) && (input instanceof FileInputStream)) { |
| try { |
| FileChannel target = ((FileOutputStream) output).getChannel(); |
| FileChannel source = ((FileInputStream) input).getChannel(); |
| |
| source.transferTo(0, Integer.MAX_VALUE, target); |
| |
| source.close(); |
| target.close(); |
| |
| return; |
| } catch (Exception e) { /* failover to byte stream version */ } |
| } |
| |
| byte[] buf = new byte[8192]; |
| while (true) { |
| int length = input.read(buf); |
| if (length < 0) { |
| break; |
| } |
| output.write(buf, 0, length); |
| } |
| |
| try { |
| input.close(); |
| } catch (IOException ignore) { |
| } |
| try { |
| output.close(); |
| } catch (IOException ignore) { |
| } |
| } |
| |
| public static void copyCompletely(Reader input, Writer output) |
| throws IOException { |
| char[] buf = new char[8192]; |
| while (true) { |
| int length = input.read(buf); |
| if (length < 0) { |
| break; |
| } |
| output.write(buf, 0, length); |
| } |
| |
| try { |
| input.close(); |
| } catch (IOException ignore) { |
| } |
| try { |
| output.close(); |
| } catch (IOException ignore) { |
| } |
| } |
| |
| public static void copyCompletely(URI input, URI output) throws IOException { |
| File out = new File(output); |
| File dir = out.getParentFile(); |
| dir.mkdirs(); |
| |
| try (InputStream in = urlToStream(input); |
| OutputStream os = new FileOutputStream(out)) { |
| IOUtil.copyCompletely(in, os); |
| } catch (IllegalArgumentException e) { |
| throw new IOException("Cannot copy to " + output); |
| } |
| } |
| |
| private static InputStream urlToStream(URI input) throws IOException { |
| try { |
| File f = new File(input); |
| if (f.exists()) { |
| return new FileInputStream(f); |
| } |
| } catch (Exception ignored) { |
| // notAFile |
| } |
| |
| return input.toURL().openStream(); |
| } |
| |
| public static File createDir(File rootdir, String subdir) { |
| File newdir = (subdir == null) ? rootdir : new File(rootdir, subdir); |
| boolean created = (newdir.exists() && newdir.isDirectory()) || newdir.mkdirs(); |
| assert (created) : "Could not create " + newdir.getAbsolutePath(); |
| return newdir; |
| } |
| } |