| /* |
| * Copyright (c) 2000, 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 4329985 |
| * @summary Ensure that BufferedReader's ready() method handles the new line |
| * character following the carriage return correctly and returns the right |
| * value so that a read operation after a ready() does not block unnecessarily. |
| */ |
| import java.io.*; |
| |
| public class Ready { |
| |
| public static void main(String[] args) throws IOException { |
| BufferedReader reader; |
| String[] strings = { |
| "LF-Only\n", |
| "LF-Only\n", |
| "CR/LF\r\n", |
| "CR/LF\r\n", |
| "CR-Only\r", |
| "CR-Only\r", |
| "CR/LF line\r\nMore data.\r\n", |
| "CR/LF line\r\nMore data.\r\n" |
| }; |
| |
| // The buffer sizes are chosen such that the boundary conditions are |
| // tested. |
| int[] bufsizes = { 7, 8, 6, 5, 7, 8, 11, 10}; |
| |
| for (int i = 0; i < strings.length; i++) { |
| reader = new BufferedReader(new BoundedReader(strings[i]), |
| bufsizes[i]); |
| while (reader.ready()) { |
| String str = reader.readLine(); |
| System.out.println("read>>" + str); |
| } |
| } |
| } |
| |
| |
| |
| private static class BoundedReader extends Reader{ |
| |
| private char[] content; |
| private int limit; |
| private int pos = 0; |
| |
| public BoundedReader(String content) { |
| this.limit = content.length(); |
| this.content = new char[limit]; |
| content.getChars(0, limit, this.content, 0); |
| } |
| |
| public int read() throws IOException { |
| if (pos >= limit) |
| throw new RuntimeException("Hit infinite wait condition"); |
| return content[pos++]; |
| } |
| |
| public int read(char[] buf, int offset, int length) |
| throws IOException |
| { |
| if (pos >= limit) |
| throw new RuntimeException("Hit infinite wait condition"); |
| int oldPos = pos; |
| int readlen = (length > (limit - pos)) ? (limit - pos) : length; |
| for (int i = offset; i < readlen; i++) { |
| buf[i] = (char)read(); |
| } |
| |
| return (pos - oldPos); |
| } |
| |
| public void close() {} |
| |
| public boolean ready() { |
| if (pos < limit) |
| return true; |
| else |
| return false; |
| } |
| } |
| |
| } |