J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.management.counter.perf; |
| 27 | |
| 28 | import sun.management.counter.*; |
| 29 | import java.nio.ByteBuffer; |
| 30 | import java.nio.ReadOnlyBufferException; |
| 31 | import java.nio.charset.Charset; |
| 32 | |
| 33 | public class PerfStringCounter extends PerfByteArrayCounter |
| 34 | implements StringCounter { |
| 35 | |
| 36 | private static Charset defaultCharset = Charset.defaultCharset(); |
| 37 | PerfStringCounter(String name, Variability v, |
| 38 | int flags, ByteBuffer bb) { |
| 39 | this(name, v, flags, bb.limit(), bb); |
| 40 | } |
| 41 | |
| 42 | PerfStringCounter(String name, Variability v, int flags, |
| 43 | int maxLength, ByteBuffer bb) { |
| 44 | |
| 45 | super(name, Units.STRING, v, flags, maxLength, bb); |
| 46 | } |
| 47 | |
| 48 | // override isVector and getVectorLength in ByteArrayCounter |
| 49 | public boolean isVector() { |
| 50 | return false; |
| 51 | } |
| 52 | |
| 53 | public int getVectorLength() { |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | public Object getValue() { |
| 58 | return stringValue(); |
| 59 | } |
| 60 | |
| 61 | public String stringValue() { |
| 62 | |
| 63 | String str = ""; |
| 64 | byte[] b = byteArrayValue(); |
| 65 | |
| 66 | if (b == null || b.length <= 1) { |
| 67 | return str; |
| 68 | } |
| 69 | |
| 70 | int i; |
| 71 | for (i = 0; i < b.length && b[i] != (byte)0; i++); |
| 72 | |
| 73 | // convert byte array to string, using all bytes up to, but |
| 74 | // not including the first null byte. |
| 75 | return new String(b , 0, i, defaultCharset); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Serialize as a snapshot object. |
| 80 | */ |
| 81 | protected Object writeReplace() throws java.io.ObjectStreamException { |
| 82 | return new StringCounterSnapshot(getName(), |
| 83 | getUnits(), |
| 84 | getVariability(), |
| 85 | getFlags(), |
| 86 | stringValue()); |
| 87 | } |
| 88 | |
| 89 | } |