WireIO.java

/*
 * Copyright (c) 2008, 2015, 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 com.sun.btrace.comm;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

public class WireIO {

    private WireIO() {}

    public static Command read(ObjectInput in) throws IOException {
        byte type = in.readByte();
        Command cmd;
        switch (type) {
            case Command.ERROR:
                cmd = new ErrorCommand();
                break;
            case Command.EVENT:
                cmd = new EventCommand();
                break;
            case Command.EXIT:
                cmd = new ExitCommand();
                break;
            case Command.INSTRUMENT:
                cmd = new InstrumentCommand();
                break;
            case Command.MESSAGE:
                cmd = new MessageCommand();
                break;
            case Command.RENAME:
                cmd = new RenameCommand();
                break;
            case Command.SUCCESS:
                cmd = new OkayCommand();
                break;
            case Command.NUMBER_MAP:
                cmd = new NumberMapDataCommand();
                break;
            case Command.STRING_MAP:
                cmd = new StringMapDataCommand();
                break;
            case Command.NUMBER:
                cmd = new NumberDataCommand();
                break;
            case Command.GRID_DATA:
                cmd = new GridDataCommand();
                break;
            case Command.RETRANSFORMATION_START:
                cmd = new RetransformationStartNotification();
                break;
            case Command.RETRANSFORM_CLASS:
                cmd = new RetransformClassNotification();
                break;
            case Command.SET_PARAMS:
                cmd = new SetSettingsCommand();
                break;
           default:
                throw new RuntimeException("invalid command: " + type);
        }
        try {
            cmd.read(in);
        } catch (ClassNotFoundException cnfe) {
            throw new IOException(cnfe);
        }
        return cmd;
    }

    public static void write(ObjectOutput out, Command cmd)
            throws IOException {
        out.writeByte(cmd.getType());
        cmd.write(out);
        if (cmd.isUrgent()) {
            out.flush();
        }
    }
}