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/pdf/PDFLaunch.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: PDFLaunch.java 1780923 2017-01-30 15:24:20Z ssteiner $ */

package org.apache.fop.pdf;

/**
 * This class represents the /Launch action.
 */
public class PDFLaunch extends PDFAction {

    private PDFReference externalFileSpec;
    private boolean newWindow;

    /**
     * Creates a new /Launch action.
     * @param fileSpec the file specification to launch
     */
    public PDFLaunch(PDFFileSpec fileSpec) {
        this(fileSpec.makeReference());
        this.newWindow = false;
    }

    /**
     * Creates a new /Launch action.
     * @param fileSpec the file specification to launch
     * @param newWindow boolean indicating whether the target should be
     *                  displayed in a new window
     */
    public PDFLaunch(PDFFileSpec fileSpec, boolean newWindow) {
        this(fileSpec.makeReference());
        this.newWindow = newWindow;
    }

    /**
     * Creates a new /Launch action.
     * @param fileSpec a reference to the file specification
     */
    public PDFLaunch(PDFReference fileSpec) {
        PDFObject fs = fileSpec.getObject();
        if (fs != null) {
            assert fs instanceof PDFFileSpec;
        }
        this.externalFileSpec = fileSpec;
    }

    /** {@inheritDoc} */
    public String getAction() {
        return this.referencePDF();
    }

    /** {@inheritDoc} */
    public String toPDFString() {
        StringBuffer sb = new StringBuffer(64);
        sb.append("<<\n/S /Launch\n/F ");
        sb.append(externalFileSpec.toString());
        if (newWindow) {
            sb.append("\n/NewWindow true");
        }
        sb.append("\n>>");

        return sb.toString();
    }

    /** {@inheritDoc} */
    protected boolean contentEquals(PDFObject obj) {
        if (this == obj) {
            return true;
        }

        if (obj == null || !(obj instanceof PDFLaunch)) {
            return false;
        }

        PDFLaunch launch = (PDFLaunch) obj;

        if (!launch.externalFileSpec.toString().equals(externalFileSpec.toString())) {
            return false;
        }

        return true;
    }
}

⏎ org/apache/fop/pdf/PDFLaunch.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)