| /* |
| * Copyright (c) 2003, 2006, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package sun.management.counter.perf; |
| |
| import sun.management.counter.*; |
| import java.nio.ByteBuffer; |
| import java.nio.ReadOnlyBufferException; |
| import java.nio.charset.Charset; |
| |
| public class PerfStringCounter extends PerfByteArrayCounter |
| implements StringCounter { |
| |
| private static Charset defaultCharset = Charset.defaultCharset(); |
| PerfStringCounter(String name, Variability v, |
| int flags, ByteBuffer bb) { |
| this(name, v, flags, bb.limit(), bb); |
| } |
| |
| PerfStringCounter(String name, Variability v, int flags, |
| int maxLength, ByteBuffer bb) { |
| |
| super(name, Units.STRING, v, flags, maxLength, bb); |
| } |
| |
| // override isVector and getVectorLength in ByteArrayCounter |
| public boolean isVector() { |
| return false; |
| } |
| |
| public int getVectorLength() { |
| return 0; |
| } |
| |
| public Object getValue() { |
| return stringValue(); |
| } |
| |
| public String stringValue() { |
| |
| String str = ""; |
| byte[] b = byteArrayValue(); |
| |
| if (b == null || b.length <= 1) { |
| return str; |
| } |
| |
| int i; |
| for (i = 0; i < b.length && b[i] != (byte)0; i++); |
| |
| // convert byte array to string, using all bytes up to, but |
| // not including the first null byte. |
| return new String(b , 0, i, defaultCharset); |
| } |
| |
| /** |
| * Serialize as a snapshot object. |
| */ |
| protected Object writeReplace() throws java.io.ObjectStreamException { |
| return new StringCounterSnapshot(getName(), |
| getUnits(), |
| getVariability(), |
| getFlags(), |
| stringValue()); |
| } |
| |
| private static final long serialVersionUID = 6802913433363692452L; |
| } |