/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * 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 signature.compare.model;

import signature.model.IWildcardType;

/**
 * {@code IWildcardTypeDelta} models the delta between two
 * {@link IWildcardType} instances.
 */
public interface IWildcardTypeDelta extends ITypeReferenceDelta<IWildcardType> {
    
    /**
     * Returns the upper bound delta or {@code null} if no delta is available.
     *
     * @return the upper bound delta, maybe {@code null}
     */
    IUpperBoundsDelta getUpperBoundDelta();

    /**
     * Returns the lower bound delta or {@code null} if no delta is available.
     *
     * @return the lower bound delta, maybe {@code null}
     */
    ITypeReferenceDelta<?> getLowerBoundDelta();
}
