Java tutorial
/* * Copyright 2002-2019 the original author or authors. * * 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 * * 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.springframework.beans; import org.springframework.lang.Nullable; /** * Interface to be implemented by bean metadata elements * that carry a configuration source object. * * @author Juergen Hoeller * @since 2.0 */ public interface BeanMetadataElement { /** * Return the configuration source {@code Object} for this metadata element * (may be {@code null}). */ @Nullable default Object getSource() { return null; } }