/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.nifi.parameter;

public interface ParameterContextLookup {

    /**
     * Returns true if the lookup has the given parameter context.
     *
     * @param id the id of the parameter context
     * @return true if the context has been found
     */
    boolean hasParameterContext(String id);

    /**
     * Gets the specified parameter context.
     *
     * @param id the id of the parameter context
     * @return the parameter context
     */
    ParameterContext getParameterContext(String id);

    ParameterContextLookup EMPTY = new ParameterContextLookup() {
        @Override
        public boolean hasParameterContext(String id) {
            return false;
        }

        @Override
        public ParameterContext getParameterContext(final String id) {
            return null;
        }
    };
}
