d_rowlock.java

derby database source code.good for you.

/*

   Derby - Class org.apache.derby.iapi.store.raw.D_RowLock

   Copyright 1998, 2004 The Apache Software Foundation or its licensors, as applicable.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */

package org.apache.derby.iapi.store.raw;

import org.apache.derby.iapi.services.diag.Diagnosticable;
import org.apache.derby.iapi.services.diag.DiagnosticableGeneric;
import org.apache.derby.iapi.services.diag.DiagnosticUtil;

import org.apache.derby.iapi.error.StandardException;

/**

The D_RowLock class provides diagnostic information about the 
RowLock qualifer, and is used for output in lock debugging.

**/

public class D_RowLock extends DiagnosticableGeneric
{
    // Names of locks for lock trace print out.
	private static String[] names = { "RS2", "RS3", "RU2", "RU3", "RIP", "RI", "RX2", "RX3" };

    /**
		Return the string for the qualifier.
     *
     * @exception StandardException	Standard Cloudscape error policy
     **/
    public String diag()
        throws StandardException
    {
        RowLock mode = (RowLock) diag_object;

        return(names[mode.getType()]);
    }
}