author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 34390 | jdk/test/java/io/Writer/Bug6856817.java@feb9879cd993 |
permissions | -rw-r--r-- |
34390
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/* |
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/* |
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* @test |
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* @bug 6856817 |
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* @summary optimize the Writer.append(CharSequence) method |
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*/ |
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import java.io.File; |
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import java.io.FileOutputStream; |
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import java.io.FileReader; |
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import java.io.IOException; |
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import java.io.OutputStream; |
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import java.io.OutputStreamWriter; |
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import java.nio.ByteBuffer; |
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import java.nio.CharBuffer; |
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|
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/** |
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* |
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* @author vyom.tewari@oacle.com |
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*/ |
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public class Bug6856817 { |
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|
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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."; |
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private static final int BUF_SIZE = 1024; |
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|
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/** |
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* |
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* @param args |
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*/ |
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public static void main(String args[]) { |
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CharBuffer charBuffer = CharBuffer.allocate(BUF_SIZE); |
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File file = new File("temp.txt"); |
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file.deleteOnExit(); |
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|
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charBuffer.put(str); |
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charBuffer.flip(); |
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checkFileContent(charBuffer, file, str); |
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charBuffer.position(10); |
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checkFileContent(charBuffer, file, str.substring(10)); |
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charBuffer.position(charBuffer.limit()); |
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checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
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|
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char arr[] = new char[BUF_SIZE]; |
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charBuffer = CharBuffer.wrap(arr); |
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charBuffer.put(str); |
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charBuffer.flip(); |
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checkFileContent(charBuffer, file, str); |
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charBuffer.position(10); |
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checkFileContent(charBuffer, file, str.substring(10)); |
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charBuffer.position(charBuffer.limit()); |
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checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
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|
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char secArr[] = new char[BUF_SIZE]; |
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charBuffer = CharBuffer.wrap(secArr); |
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charBuffer.put(str); |
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charBuffer.position(5); |
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charBuffer.limit(str.length() - 7); |
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charBuffer = charBuffer.slice(); |
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checkFileContent(charBuffer, file, str.substring(5, (str.length() - 7))); |
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charBuffer.position(10); |
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checkFileContent(charBuffer, file, str.substring(15, (str.length() - 7))); |
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charBuffer.position(charBuffer.limit()); |
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checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
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|
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charBuffer = ByteBuffer.allocate(BUF_SIZE).asCharBuffer(); |
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charBuffer.put(str); |
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charBuffer.flip(); |
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checkFileContent(charBuffer, file, str); |
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charBuffer.position(10); |
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checkFileContent(charBuffer, file, str.substring(10)); |
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charBuffer.position(charBuffer.limit()); |
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checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
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|
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charBuffer = ByteBuffer.allocateDirect(1024).asCharBuffer(); |
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charBuffer.put(str); |
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charBuffer.flip(); |
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checkFileContent(charBuffer, file, str); |
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charBuffer.position(10); |
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checkFileContent(charBuffer, file, str.substring(10)); |
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charBuffer.position(charBuffer.limit()); |
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checkFileContent(charBuffer, file, str.substring(charBuffer.limit())); |
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} |
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|
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private static void checkFileContent(CharBuffer charBuffer, File file, String expectedValue) { |
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OutputStreamWriter writer = null; |
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FileReader reader = null; |
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int position, limit; |
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position = charBuffer.position(); |
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limit = charBuffer.limit(); |
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try { |
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OutputStream outputStream = new FileOutputStream(file); |
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writer = new OutputStreamWriter(outputStream); |
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writer.append(charBuffer); |
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writer.close(); |
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if (!isEqual(position, charBuffer.position())) { |
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117 |
System.out.println(": failed"); |
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118 |
throw new RuntimeException("buffer position before write: " + position + " and position after write: " + charBuffer.position()); |
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119 |
} |
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120 |
if (!isEqual(limit, charBuffer.limit())) { |
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System.out.println(": failed"); |
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throw new RuntimeException("buffer limit before write: " + limit + " and limit after write: " + charBuffer.limit()); |
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} |
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124 |
reader = new FileReader(file); |
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125 |
char arr[] = new char[BUF_SIZE]; |
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int byteRead = reader.read(arr); |
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if (byteRead != -1) { |
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String stringRead = new String(arr, 0, byteRead); |
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129 |
if (expectedValue.equals(stringRead)) { |
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130 |
System.out.println(": passed"); |
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131 |
} else { |
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132 |
System.out.println(": failed"); |
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133 |
throw new RuntimeException("expected :" + expectedValue + " and got:" + stringRead); |
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} |
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135 |
} |
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136 |
} catch (IOException ex) { |
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137 |
ex.printStackTrace(); |
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138 |
throw new RuntimeException(ex); |
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139 |
} finally { |
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140 |
try { |
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if (writer != null) { |
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writer.close(); |
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} |
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if (reader != null) { |
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reader.close(); |
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} |
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} catch (IOException ex) { |
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throw new RuntimeException(ex); |
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} |
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} |
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} |
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|
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private static boolean isEqual(final int first, final int second) { |
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return (first == second); |
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} |
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} |