io.guise.framework.component.AbstractValuedPanel Maven / Gradle / Ivy

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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.component;

import static java.util.Objects.*;

import io.guise.framework.component.layout.*;

/**
 * An abstract panel that represents a value.
 * @param  The type of value displayed within the component.
 * @author Garret Wilson
 */
public abstract class AbstractValuedPanel extends AbstractPanel implements ValuedComponent {

	/** The class representing the type of value displayed within the component. */
	private final Class valueClass;

	@Override
	public Class getValueClass() {
		return valueClass;
	}

	/**
	 * Value class and layout constructor.
	 * @param valueClass The class indicating the type of value displayed within the component.
	 * @param layout The layout definition for the container.
	 * @throws NullPointerException if the given value class and/or layout is null.
	 */
	public AbstractValuedPanel(final Class valueClass, final Layout layout) {
		super(layout); //construct the parent class
		this.valueClass = requireNonNull(valueClass, "Value class cannot be null."); //store the value class
	}

}