What Is fop.jar? I got it from the fop-2.7-bin.zip.

fop.jar in fop-2.7-bin.zip is the JAR file for FOP 2.7, which is a print formatter driven by XSL formatting objects (XSL-FO). You can obtain fop.jar from the build folder of the fop-2.7-bin.zip file.

Below is the information about the fop.jar (2.2) file:

JAR File Size and Download Location:

JAR name: fop.jar, fop-2.7.jar
Target JDK version: 1.7
File name: fop.jar
File size: 4442817 bytes
Release date: 20-Jan-2022
Download: Apache FOP Website

Java source code files for fop.jar:

⏎ org/apache/fop/fonts/EncodingMode.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.
 */

/* $Id: EncodingMode.java 1352986 2012-06-22 18:07:04Z vhennebert $ */

package org.apache.fop.fonts;

/**
 * This class enumerates all supported encoding modes for fonts: auto, single-byte and CID.
 */
public enum EncodingMode {

    /** Automatic selection of encoding mode. */
    AUTO("auto"),

    /** Single-byte encoding */
    SINGLE_BYTE("single-byte"),

    /** CID encoding */
    CID("cid");

    private String name;

    private EncodingMode(String name) {
        this.name = name;
    }

    /**
     * Returns the encoding mode name.
     * @return the encoding mode name
     */
    public String getName() {
        return this.name;
    }

    /**
     * Returns the {@link EncodingMode} by name.
     * @param name the name of the encoding mode to look up
     * @return the encoding mode constant
     */
    public static EncodingMode getValue(String name) {
        for (EncodingMode em : EncodingMode.values()) {
            if (name.equalsIgnoreCase(em.getName())) {
                return em;
            }
        }
        throw new IllegalArgumentException("Invalid encoding mode: " + name);
    }

    /** {@inheritDoc} */
    public String toString() {
        return "EncodingMode: " + getName();
    }

}

⏎ org/apache/fop/fonts/EncodingMode.java

Or download all of them as a single archive file:

File name: fop-2.7-src.zip
File size: 3401312 bytes
Release date: 2022-01-20
Download 

⇒ "fop" Command in fop-2.7-bin.zip

⇐ What Is fop-2.7-bin.zip

⇑ Download and Installing of FOP 2.x

⇑⇑ FAQ for FOP (Formatting Object Processor)