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Source Code for Apache Log4j API
Apache Log4j API provides the interface that applications should code to and provides the adapter components required for implementers to create a logging implementation. Apache Log4j API is a required module to use Apache Log4j.
Bytecode (Java 8) for Apache Log4j API is provided in a separate JAR file like log4j-api-2.14.1.jar.
Source Code files for Apache Log4j API are provided in both binary packge like apache-log4j-2.14.1-bin.zip and source package like apache-log4j-2.14.1-src.zip. You can download them at Apache Log4j Website.
You can also browse Source Code files for Apache Log4j API 2.14.1 below.
✍: FYIcenter.com
⏎ org/apache/logging/log4j/util/LambdaUtil.java
/* * 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.util; import org.apache.logging.log4j.message.Message; import org.apache.logging.log4j.message.MessageFactory; /** * Utility class for lambda support. */ public final class LambdaUtil { /** * Private constructor: this class is not intended to be instantiated. */ private LambdaUtil() { } /** * Converts an array of lambda expressions into an array of their evaluation results. * * @param suppliers an array of lambda expressions or {@code null} * @return an array containing the results of evaluating the lambda expressions (or {@code null} if the suppliers * array was {@code null} */ public static Object[] getAll(final Supplier<?>... suppliers) { if (suppliers == null) { return null; } final Object[] result = new Object[suppliers.length]; for (int i = 0; i < result.length; i++) { result[i] = get(suppliers[i]); } return result; } /** * Returns the result of evaluating the specified function. If the supplied value is of type Message, this method * returns the result of calling {@code #getFormattedMessage} on that Message. * @param supplier a lambda expression or {@code null} * @return the results of evaluating the lambda expression (or {@code null} if the supplier * was {@code null} */ public static Object get(final Supplier<?> supplier) { if (supplier == null) { return null; } final Object result = supplier.get(); return result instanceof Message ? ((Message) result).getFormattedMessage() : result; } /** * Returns the Message supplied by the specified function. * @param supplier a lambda expression or {@code null} * @return the Message resulting from evaluating the lambda expression (or {@code null} if the supplier was * {@code null} */ public static Message get(final MessageSupplier supplier) { if (supplier == null) { return null; } return supplier.get(); } /** * Returns a Message, either the value supplied by the specified function, or a new Message created by the specified * Factory. * @param supplier a lambda expression or {@code null} * @return the Message resulting from evaluating the lambda expression or the Message created by the factory for * supplied values that are not of type Message */ public static Message getMessage(final Supplier<?> supplier, final MessageFactory messageFactory) { if (supplier == null) { return null; } final Object result = supplier.get(); return result instanceof Message ? (Message) result : messageFactory.newMessage(result); } }
⏎ org/apache/logging/log4j/util/LambdaUtil.java
Or download all of them as a single archive file:
File name: log4j-api-2.14.1-sources.jar File size: 264773 bytes Release date: 2021-03-06 Download
⇒ Source Code for Apache Log4j Core Implementation
⇐ Downloading Apache Log4j Binary Package
2015-11-17, 30135👍, 0💬
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