/*
 *  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
 *
 *    https://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.grails.cli.compiler.grape;

import java.lang.reflect.Field;

import groovy.grape.Grape;
import groovy.grape.GrapeEngine;

/**
 * Utility to install a specific {@link Grape} engine with Groovy.
 *
 * @author Andy Wilkinson
 * @since 1.0.0
 */
public abstract class GrapeEngineInstaller {

    public static void install(GrapeEngine engine) {
        synchronized (Grape.class) {
            try {
                Field field = Grape.class.getDeclaredField("instance");
                field.setAccessible(true);
                field.set(null, engine);
            }
            catch (Exception ex) {
                throw new IllegalStateException("Failed to install GrapeEngine", ex);
            }
        }
    }

}
