116 lines
3.9 KiB
Java
116 lines
3.9 KiB
Java
/*
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* Copyright (c) 2001, 2017, 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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* @test
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* @bug 4417672 4422328
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* @summary Checks the functionality of MemoryCacheImageOutputStream
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* particularly with regard to seeking and flushing
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*/
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import javax.imageio.stream.ImageOutputStream;
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import javax.imageio.stream.MemoryCacheImageOutputStream;
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public class MemoryCacheImageOutputStreamTest {
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public static void main(String[] args) throws IOException {
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try {
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MemoryCacheImageOutputStream stream =
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new MemoryCacheImageOutputStream(new ByteArrayOutputStream());
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stream.write(0); // or write anything, for that matter
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stream.flush();
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} catch (Exception e) {
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throw new RuntimeException("Error flushing stream: " + e);
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}
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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ImageOutputStream ios = new MemoryCacheImageOutputStream(os);
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byte[] b = new byte[30*256];
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byte byteVal = (byte)0;
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for (int i = 0; i < b.length; i++) {
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b[i] = byteVal++;
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}
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// Write 261,120 bytes
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for (int i = 0; i < 34; i++) {
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ios.write(b);
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}
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// Scatter 256 values at positions 1000, 2000, ...
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// Using both write(int) and write(byte[])
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byte[] buf = new byte[1];
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for (int i = 0; i < 256; i += 2) {
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ios.seek(1000*i);
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ios.write(i);
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ios.seek(1000*(i + 1));
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buf[0] = (byte)(i + 1);
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ios.write(buf);
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}
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// Re-read scattered values
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for (int i = 0; i < 256; i++) {
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ios.seek(1000*i);
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int val = ios.read();
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if (val != i) {
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System.out.println("Got bad value (1) at pos = " + (1000*i));
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}
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}
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// Discard two buffers and re-read scattered values
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ios.flushBefore(2*8192);
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for (int i = 0; i < 256; i++) {
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long pos = 1000*i;
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if (pos >= 2*8192) {
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ios.seek(pos);
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int val = ios.read();
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if (val != i) {
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System.out.println("Got bad value (2) at pos = " + (1000*i));
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}
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}
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}
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ios.close();
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byte[] data = os.toByteArray();
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for (int i = 0; i < data.length; i++) {
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byte val = data[i];
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if ((i < 256000) && (i % 1000) == 0) {
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if (val != (byte)(i/1000)) {
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System.out.println("Got bad value (3) at pos = " + i);
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}
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} else {
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byte gval = (byte)((i % (30*256)) % 256);
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if (val != gval) {
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System.out.println("Got bad value (4) at pos = " + i +
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"(got " + (val & 0xff) +
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" wanted " + (gval & 0xff) +")");
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}
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}
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}
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}
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}
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