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annotate graal/com.oracle.max.base/src/com/sun/max/io/SeekableByteArrayOutputStream.java @ 4142:bc8527f3071c

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Adjust code base to new level of warnings.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 18 Dec 2011 05:24:06 +0100
parents e233f5660da4
children
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1 /*
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.max.io;
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24
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25 import java.io.*;
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26
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27 /**
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28 * A {@link ByteArrayOutputStream} that can have its write position {@linkplain #seek(int) updated}.
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29 */
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30 public class SeekableByteArrayOutputStream extends ByteArrayOutputStream {
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31
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32 private int highestCount;
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33
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34 /**
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35 * @see ByteArrayOutputStream#ByteArrayOutputStream()
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36 */
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37 public SeekableByteArrayOutputStream() {
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38 }
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39
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40 /**
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41 * @see ByteArrayOutputStream#ByteArrayOutputStream(int)
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42 */
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43 public SeekableByteArrayOutputStream(int size) {
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44 super(size);
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45 }
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46
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47 /**
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48 * Updates the write position of this stream. The stream can only be repositioned between 0 and the
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49 * {@linkplain #endOfStream() end of the stream}.
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50 *
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51 * @param index
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52 * the index to which the write position of this stream will be set
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53 * @throws IllegalArgumentException
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54 * if {@code index > highestSeekIndex()}
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55 */
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56 public void seek(int index) throws IllegalArgumentException {
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57 if (endOfStream() < index) {
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58 throw new IllegalArgumentException();
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59 }
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60 count = index;
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61 }
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62
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63 /**
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64 * Gets the index one past the highest index that has been written to in this stream.
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65 */
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66 public int endOfStream() {
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67 if (highestCount < count) {
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68 highestCount = count;
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69 }
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70 return highestCount;
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71 }
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72
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73 @Override
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74 public synchronized void reset() {
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75 super.reset();
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76 highestCount = 0;
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77 }
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78
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79 /**
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80 * Copies the {@code length} bytes of this byte array output stream starting at {@code offset} to {@code buf}
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81 * starting at {@code bufOffset}.
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82 */
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83 public void copyTo(int offset, byte[] toBuffer, int toOffset, int length) {
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84 System.arraycopy(this.buf, offset, toBuffer, toOffset, length);
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85 }
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86 }