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.

⏎ org/apache/logging/log4j/message/StringFormatterMessageFactory.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.message;

/**
 * Creates {@link FormattedMessage} instances for {@link MessageFactory2} methods (and {@link MessageFactory} by
 * extension.)
 * <p>
 * Enables the use of {@link java.util.Formatter} strings in message strings.
 * </p>
 * <p>
 * Creates {@link StringFormattedMessage} instances for {@link #newMessage(String, Object...)}.
 * </p>
 * <p>
 * This class is immutable.
 * </p>
 * <h4>Note to implementors</h4>
 * <p>
 * This class implements all {@link MessageFactory2} methods.
 * </p>
 */
public final class StringFormatterMessageFactory extends AbstractMessageFactory {

    /**
     * Instance of StringFormatterMessageFactory.
     */
    public static final StringFormatterMessageFactory INSTANCE = new StringFormatterMessageFactory();
    private static final long serialVersionUID = -1626332412176965642L;

    /**
     * Constructs a message factory with default flow strings.
     */
    public StringFormatterMessageFactory() {
    }

    /**
     * Creates {@link StringFormattedMessage} instances.
     *
     * @param message The message pattern.
     * @param params The parameters to the message.
     * @return The Message.
     *
     * @see MessageFactory#newMessage(String, Object...)
     */
    @Override
    public Message newMessage(final String message, final Object... params) {
        return new StringFormattedMessage(message, params);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0) {
        return new StringFormattedMessage(message, p0);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1) {
        return new StringFormattedMessage(message, p0, p1);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2) {
        return new StringFormattedMessage(message, p0, p1, p2);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3) {
        return new StringFormattedMessage(message, p0, p1, p2, p3);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3, final Object p4) {
        return new StringFormattedMessage(message, p0, p1, p2, p3, p4);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3, final Object p4, final Object p5) {
        return new StringFormattedMessage(message, p0, p1, p2, p3, p4, p5);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3, final Object p4, final Object p5,
            final Object p6) {
        return new StringFormattedMessage(message, p0, p1, p2, p3, p4, p5, p6);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3, final Object p4, final Object p5,
            final Object p6, final Object p7) {
        return new StringFormattedMessage(message, p0, p1, p2, p3, p4, p5, p6, p7);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3, final Object p4, final Object p5,
            final Object p6, final Object p7, final Object p8) {
        return new StringFormattedMessage(message, p0, p1, p2, p3, p4, p5, p6, p7, p8);
    }

    /**
     * @since 2.6.1
     */
    @Override
    public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3, final Object p4, final Object p5,
            final Object p6, final Object p7, final Object p8, final Object p9) {
        return new StringFormattedMessage(message, p0, p1, p2, p3, p4, p5, p6, p7, p8, p9);
    }
}

⏎ org/apache/logging/log4j/message/StringFormatterMessageFactory.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
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