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/*
 * Copyright (C) 2013 Andrey Chaschev.
 *
 * 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 bear.context;

import com.google.common.base.Function;

/**
 * @author Andrey Chaschev [email protected]
 */
public interface Fun extends Function {
    public static final Object UNDEFINED = new UndefinedReturnValue();

    T apply(CONTEXT $);

    public static class UndefinedReturnValue {
        @Override
        public String toString() {
            return "UNDEFINED";
        }
    }

    public static final class UndefinedException extends RuntimeException{
        public UndefinedException() {
        }

        public UndefinedException(String message) {
            super(message);
        }

        public UndefinedException(String message, Throwable cause) {
            super(message, cause);
        }

        public UndefinedException(Throwable cause) {
            super(cause);
        }

        public UndefinedException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
            super(message, cause, enableSuppression, writableStackTrace);
        }

        public static void throwUndefined(){
            throw new UndefinedException();
        }
    }



}