/*
 * @(#)Declarations.java	1.1 04/01/26
 *
 * Copyright (c) 2004, Sun Microsystems, Inc.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Sun Microsystems, Inc. nor the names of
 *       its contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.sun.mirror.util;


import com.sun.mirror.declaration.*;


/**
 * Utility methods for operating on declarations.
 *
 * @author Joseph D. Darcy
 * @author Scott Seligman
 * @version 1.1 04/01/26
 * @since 1.5
 */

public interface Declarations {

    /**
     * Tests whether one type, method, or field declaration hides another.
     *
     * @param sub the first member
     * @param sup the second member
     * @return <tt>true</tt> if and only if the first member hides
     *		the second
     */
    boolean hides(MemberDeclaration sub, MemberDeclaration sup);

    /**
     * Tests whether one method overrides another.  When a
     * non-abstract method overrides an abstract one, the
     * former is also said to <i>implement</i> the latter.
     *
     * @param sub the first method
     * @param sup the second method
     * @return <tt>true</tt> if and only if the first method overrides
     *		the second
     */
    boolean overrides(MethodDeclaration sub, MethodDeclaration sup);
}