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/layout/PatternMatch.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.layout;

import java.io.ObjectStreamException;
import java.io.Serializable;
import java.util.Objects;

import org.apache.logging.log4j.core.config.Node;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory;

/**
 * PatternMatch configuration item.
 *
 * @since 2.4.1 implements {@link Serializable}
 */
@Plugin(name = "PatternMatch", category = Node.CATEGORY, printObject = true)
public final class PatternMatch {

    private final String key;
    private final String pattern;

    /**
     * Constructs a key/value pair. The constructor should only be called from test classes.
     * @param key The key.
     * @param pattern The value.
     */
    public PatternMatch(final String key, final String pattern) {
        this.key = key;
        this.pattern = pattern;
    }

    /**
     * Returns the key.
     * @return the key.
     */
    public String getKey() {
        return key;
    }

    /**
     * Returns the pattern.
     * @return The pattern.
     */
    public String getPattern() {
        return pattern;
    }

    @Override
    public String toString() {
        return key + '=' + pattern;
    }

    @PluginBuilderFactory
    public static Builder newBuilder() {
        return new Builder();
    }

    public static class Builder implements org.apache.logging.log4j.core.util.Builder<PatternMatch>, Serializable {

        private static final long serialVersionUID = 1L;

        @PluginBuilderAttribute
        private String key;

        @PluginBuilderAttribute
        private String pattern;

        public Builder setKey(final String key) {
            this.key = key;
            return this;
        }

        public Builder setPattern(final String pattern) {
            this.pattern = pattern;
            return this;
        }

        @Override
        public PatternMatch build() {
            return new PatternMatch(key, pattern);
        }

        protected Object readResolve() throws ObjectStreamException {
            return new PatternMatch(key, pattern);
        }
    }

    @Override
    public int hashCode() {
        return Objects.hash(key, pattern);
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final PatternMatch other = (PatternMatch) obj;
        if (!Objects.equals(key, other.key)) {
            return false;
        }
        if (!Objects.equals(pattern, other.pattern)) {
            return false;
        }
        return true;
    }
}

⏎ org/apache/logging/log4j/core/layout/PatternMatch.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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