| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6856817 |
| * @summary optimize the Writer.append(CharSequence) method |
| */ |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| |
| /** |
| * |
| * @author vyom.tewari@oacle.com |
| */ |
| public class Bug6856817 { |
| |
| private static final String str = "This is just a test string that i am using it to test the CharBuffer.append(CharSequence csq) for little bit performance improvement."; |
| private static final int BUF_SIZE = 1024; |
| |
| /** |
| * |
| * @param args |
| */ |
| public static void main(String args[]) { |
| CharBuffer charBuffer = CharBuffer.allocate(BUF_SIZE); |
| File file = new File("temp.txt"); |
| file.deleteOnExit(); |
| |
| charBuffer.put(str); |
| charBuffer.flip(); |
| checkFileContent(charBuffer, file, str); |
| charBuffer.position(10); |
| checkFileContent(charBuffer, file, str.substring(10)); |
| charBuffer.position(charBuffer.limit()); |
| checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
| |
| char arr[] = new char[BUF_SIZE]; |
| charBuffer = CharBuffer.wrap(arr); |
| charBuffer.put(str); |
| charBuffer.flip(); |
| checkFileContent(charBuffer, file, str); |
| charBuffer.position(10); |
| checkFileContent(charBuffer, file, str.substring(10)); |
| charBuffer.position(charBuffer.limit()); |
| checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
| |
| char secArr[] = new char[BUF_SIZE]; |
| charBuffer = CharBuffer.wrap(secArr); |
| charBuffer.put(str); |
| charBuffer.position(5); |
| charBuffer.limit(str.length() - 7); |
| charBuffer = charBuffer.slice(); |
| checkFileContent(charBuffer, file, str.substring(5, (str.length() - 7))); |
| charBuffer.position(10); |
| checkFileContent(charBuffer, file, str.substring(15, (str.length() - 7))); |
| charBuffer.position(charBuffer.limit()); |
| checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
| |
| charBuffer = ByteBuffer.allocate(BUF_SIZE).asCharBuffer(); |
| charBuffer.put(str); |
| charBuffer.flip(); |
| checkFileContent(charBuffer, file, str); |
| charBuffer.position(10); |
| checkFileContent(charBuffer, file, str.substring(10)); |
| charBuffer.position(charBuffer.limit()); |
| checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
| |
| charBuffer = ByteBuffer.allocateDirect(1024).asCharBuffer(); |
| charBuffer.put(str); |
| charBuffer.flip(); |
| checkFileContent(charBuffer, file, str); |
| charBuffer.position(10); |
| checkFileContent(charBuffer, file, str.substring(10)); |
| charBuffer.position(charBuffer.limit()); |
| checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
| } |
| |
| private static void checkFileContent(CharBuffer charBuffer, File file, String expectedValue) { |
| OutputStreamWriter writer = null; |
| FileReader reader = null; |
| int position, limit; |
| position = charBuffer.position(); |
| limit = charBuffer.limit(); |
| try { |
| OutputStream outputStream = new FileOutputStream(file); |
| writer = new OutputStreamWriter(outputStream); |
| writer.append(charBuffer); |
| writer.close(); |
| if (!isEqual(position, charBuffer.position())) { |
| System.out.println(": failed"); |
| throw new RuntimeException("buffer position before write: " + position + " and position after write: " + charBuffer.position()); |
| } |
| if (!isEqual(limit, charBuffer.limit())) { |
| System.out.println(": failed"); |
| throw new RuntimeException("buffer limit before write: " + limit + " and limit after write: " + charBuffer.limit()); |
| } |
| reader = new FileReader(file); |
| char arr[] = new char[BUF_SIZE]; |
| int byteRead = reader.read(arr); |
| if (byteRead != -1) { |
| String stringRead = new String(arr, 0, byteRead); |
| if (expectedValue.equals(stringRead)) { |
| System.out.println(": passed"); |
| } else { |
| System.out.println(": failed"); |
| throw new RuntimeException("expected :" + expectedValue + " and got:" + stringRead); |
| } |
| } |
| } catch (IOException ex) { |
| ex.printStackTrace(); |
| throw new RuntimeException(ex); |
| } finally { |
| try { |
| if (writer != null) { |
| writer.close(); |
| } |
| if (reader != null) { |
| reader.close(); |
| } |
| } catch (IOException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| } |
| |
| private static boolean isEqual(final int first, final int second) { |
| return (first == second); |
| } |
| } |