org.apache.logging.log4j.plugins.di.DI Maven / Gradle / Ivy

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/*
 * 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.logging.log4j.plugins.di;

import org.apache.logging.log4j.plugins.Factory;

/**
 * Factory for {@linkplain Injector factory factories}.
 */
public final class DI {
    private DI() {
        throw new IllegalStateException("Utility class");
    }

    /**
     * Creates a new Injector with no bindings.
     */
    public static Injector createInjector() {
        return new DefaultInjector();
    }

    /**
     * Creates a new Injector with the provided bundles as initial bindings. Bundles may be either Class instances or object
     * instances with {@link Factory}-annotated methods. Classes are dependency-injected before scanning for factory methods
     * while instances are assumed to be already configured.
     */
    public static Injector createInjector(final Object... bundles) {
        final var injector = new DefaultInjector();
        for (final Object module : bundles) {
            injector.registerBundle(module);
        }
        return injector;
    }
}