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Guise™ Internet application framework.

There is a newer version: 0.5.3

/*
 * Copyright © 2005-2008 GlobalMentor, Inc. 
 *
 * 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 io.guise.framework.input;

/**
 * A strategy for processing input.
 * @author Garret Wilson
 */
public interface InputStrategy {

	/** @return The parent input strategy, or null if there is no parent input strategy. */
	public InputStrategy getParent();

	/**
	 * Processes input, returning whether the input was consumed. If the input is not consumed by this input strategy, it is sent to the parent input strategy, if
	 * any, for processing.
	 * @param input The input to process.
	 * @return true if the input was consumed and should not be processed further.
	 * @throws NullPointerException if the given input is null.
	 */
	public boolean input(final Input input);

}