/*

 * Copyright (c) 2003, 2013, 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

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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 synchronization 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);

        }

    }

}