Apache Log4j Core Implementation provides the functional components of the logging system. Users are free to create their own plugins and include them in the logging configuration. Apache Log4j Core is a required module to use Apache Log4j.

Bytecode (Java 8) for Apache Log4j Core Implementation is provided in a separate JAR file like log4j-core-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 Core Implementation 2.14.1 below.

⏎ org/apache/logging/log4j/core/pattern/LiteralPatternConverter.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.core.pattern;

import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.util.OptionConverter;
import org.apache.logging.log4j.util.PerformanceSensitive;


/**
 * Formats a string literal.
 */
@PerformanceSensitive("allocation") // except for replacements
public final class LiteralPatternConverter extends LogEventPatternConverter implements ArrayPatternConverter {

    /**
     * String literal.
     */
    private final String literal;

    private final Configuration config;

    private final boolean substitute;

    /**
     * Create a new instance.
     *
     * @param config The Configuration.
     * @param literal string literal.
     * @param convertBackslashes if {@code true}, backslash characters are treated as escape characters and character
     *            sequences like "\" followed by "t" (backslash+t) are converted to special characters like '\t' (tab).
     */
    public LiteralPatternConverter(final Configuration config, final String literal, final boolean convertBackslashes) {
        super("Literal", "literal");
        this.literal = convertBackslashes ? OptionConverter.convertSpecialChars(literal) : literal; // LOG4J2-829
        this.config = config;
        substitute = config != null && literal.contains("${");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void format(final LogEvent event, final StringBuilder toAppendTo) {
        toAppendTo.append(substitute ? config.getStrSubstitutor().replace(event, literal) : literal);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void format(final Object obj, final StringBuilder output) {
        output.append(substitute ? config.getStrSubstitutor().replace(literal) : literal);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void format(final StringBuilder output, final Object... objects) {
        output.append(substitute ? config.getStrSubstitutor().replace(literal) : literal);
    }

    public String getLiteral() {
        return literal;
    }

    @Override
    public boolean isVariable() {
        return false;
    }

    @Override
    public String toString() {
        return "LiteralPatternConverter[literal=" + literal + ", config=" + config + ", substitute=" + substitute + "]";
    }

}

⏎ org/apache/logging/log4j/core/pattern/LiteralPatternConverter.java

Or download all of them as a single archive file:

File name: log4j-core-2.14.1-sources.jar
File size: 1281358 bytes
Release date: 2021-03-06
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