DerivedValueModel.java

/**
 * Copyright (C) 2015 Valkyrie RCP
 *
 * 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.valkyriercp.binding.value;

/**
 * A value model that derives its value by applying some transformation to one
 * or more source value models.
 *
 * <p>
 * Typical usage would be a type converter or string formatter.
 *
 * @author Oliver Hutchison
 */
public interface DerivedValueModel extends ValueModel {

	/**
	 * Returns an array of all values models that are used to derive the value
	 * represented by this value model.
	 */
	ValueModel[] getSourceValueModels();

	/**
	 * Returns true if the implementation does not support calls setValue.
	 */
	boolean isReadOnly();
}