/*
* Copyright (c) 2003, 2011, 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.
*
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*/
package sun.management.counter.perf;
import java.io.UnsupportedEncodingException;
/**
* A typesafe enumeration for the data types supported for
* performance data.
*
* <p> The enumeration values for this typesafe enumeration must be
* kept in sychronization with the PerfDataType enum in the
* globalsDefinitions.hpp file in the HotSpot source base.</p>
*
* @author Brian Doherty
*/
class PerfDataType {
private final String name;
private final byte value;
private final int size;
public static final PerfDataType BOOLEAN = new PerfDataType("boolean", "Z", 1);
public static final PerfDataType CHAR = new PerfDataType("char", "C", 1);
public static final PerfDataType FLOAT = new PerfDataType("float", "F", 8);
public static final PerfDataType DOUBLE = new PerfDataType("double", "D", 8);
public static final PerfDataType BYTE = new PerfDataType("byte", "B", 1);
public static final PerfDataType SHORT = new PerfDataType("short", "S", 2);
public static final PerfDataType INT = new PerfDataType("int", "I", 4);
public static final PerfDataType LONG = new PerfDataType("long", "J", 8);
public static final PerfDataType ILLEGAL = new PerfDataType("illegal", "X", 0);
private static PerfDataType basicTypes[] = {
LONG, BYTE, BOOLEAN, CHAR, FLOAT, DOUBLE, SHORT, INT
};
public String toString() {
return name;
}
public byte byteValue() {
return value;
}
public int size() {
return size;
}
/**
* Maps an integer PerfDataType value to its corresponding PerfDataType
* object.
*
* @param i an integer representation of a PerfDataType
* @return The PerfDataType object for <code>i</code>
*/
public static PerfDataType toPerfDataType(byte type) {
for (int j = 0; j < basicTypes.length; j++) {
if (basicTypes[j].byteValue() == type) {
return (basicTypes[j]);
}
}
return ILLEGAL;
}
private PerfDataType(String name, String c, int size) {
this.name = name;
this.size = size;
try {
byte[] b = c.getBytes("UTF-8");
this.value = b[0];
} catch (UnsupportedEncodingException e) {
// ignore, "UTF-8" is always a known encoding
throw new InternalError("Unknown encoding", e);
}
}
}