/**
 * Copyright (c) 2015, Lucee Assosication Switzerland. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package lucee.runtime.instrumentation;

import lucee.commons.lang.StringUtil;

/**
 * Utilities for dealing with different Java vendors.
 */
public enum JavaVendor {
    IBM("com.ibm.tools.attach.VirtualMachine"), SUN("com.sun.tools.attach.VirtualMachine"),
    // When in doubt, try the Sun implementation.
    OTHER("com.sun.tools.attach.VirtualMachine");

    static {
        String vendor = System.getProperty("java.vendor");
        if (StringUtil.containsIgnoreCase(vendor, "SUN MICROSYSTEMS")) {
            _vendor = SUN;
        } 
        else if (StringUtil.containsIgnoreCase(vendor, "IBM")) {
            _vendor = IBM;
        } 
        else {
            _vendor = OTHER;
        }
    }
    
    private static final JavaVendor _vendor;
    private String _virtualMachineClass = null;
    
    private JavaVendor(String vmClass) {
        _virtualMachineClass = vmClass;
    }

    /**
     * This static worker method returns the current Vendor.
     */
    public static JavaVendor getCurrentVendor() {
        return _vendor;
    }
    
    /**
     * This static worker method returns <b>true</b> if the current implementation is IBM.
     */
    public boolean isIBM() {
        return _vendor == IBM;
    }

    /**
     * This static worker method returns <b>true</b> if the current implementation is Sun.
     */
    public boolean isSun() {
        return _vendor == SUN;
    }
    
    public String getVirtualMachineClassName() {
        return _virtualMachineClass;
    }
}