--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/io/Writer/Bug6856817.java Wed Dec 02 21:32:40 2015 +0100
@@ -0,0 +1,156 @@
+/*
+ * 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);
+ }
+}