ActionWithResult.java

package mage.interfaces;

import mage.MageException;

/**
 * Light weight action interface.
 * For executing actions without any context.
 *
 * @param <T> Type to return as a result of execution.
 *
 * @author noxx
 */
public interface ActionWithResult<T> {

    /**
     * Executes and returns result.
     * @return
     */
    T execute() throws MageException;

    /**
     * Defines negative result specific for type <T>.
     * @return
     */
    T negativeResult();
}