assert.java

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/***********************************************************************
 * Copyright (c) 2000-2004 The Apache Software Foundation.             *
 * All rights reserved.                                                *
 * ------------------------------------------------------------------- *
 * 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.james.util;


/**
 * A set of debugging utilities.
 */
public final class Assert
{
    public static final boolean ON = true;

    // Can't instantiate.
    private Assert()
    {
    };

    /**
     * Checks the supplied boolean expression, throwing an AssertionException if false;
     */
    public static void isTrue( boolean expression )
    {
        if ( !expression ) {
            throw new RuntimeException( "Assertion Failed." );
        }
    }

    /**
     * Fails with an assertion exception.
     */
    public static void fail()
    {
        throw new RuntimeException( "Assertion error - should not reach here." );
    }

    /**
     * Fails, indicating not-yet-implemented features.
     */
    public static void notImplemented()
    {
        throw new RuntimeException( "Not implemented" );
    }

}