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/render/ps/extensions/PSSetPageDevice.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: PSSetPageDevice.java 1778105 2017-01-10 10:33:41Z ssteiner $ */

package org.apache.fop.render.ps.extensions;

import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;

/**
 * Element for postscript setpagedevice instruction
 * This is a an extension which provides a pass-through value
 * dictionary object for the postscript setpagedevice instruction.
 */
public class PSSetPageDevice extends PSExtensionAttachment {
    /** element name */
    protected static final String ELEMENT = "ps-setpagedevice";

    private static final String ATT_NAME = "name";

    /**
     * name attribute
     */
    protected String name;

    /**
     * default constructor
     * @param content set page device dictionary
     */
    public PSSetPageDevice(String content) {
        super(content);
    }

    /**
     * constructor
     * @param name name attribute of this setpagedevice content
     * @param content set page device dictionary
     */
    public PSSetPageDevice(String name, String content) {
        this(content);
        this.name = name;
    }

    /**
     * constructor
     */
    public PSSetPageDevice() {
    }

    /** @return the name */
    public String getName() {
        return name;
    }

    /**
     * Sets the name of the setup code object.
     * @param name The name to set.
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return a string representation of this object
     * @see java.lang.Object#toString()
     */
    public String toString() {
        return "PSSetPageDevice(name=" + getName() + ", content='" + getContent() + "')";
    }

    /**
     * @return a string representation of this object
     * @see org.apache.fop.render.ps.extensions.PSExtensionAttachment#getElement()
     */
    protected String getElement() {
        return ELEMENT;
    }

    /**
     * Generates SAX events representing the object's state.
     * @param handler ContentHandler instance to send the SAX events to
     * @throws SAXException if there's a problem generating the SAX events
     * @see org.apache.xmlgraphics.util.XMLizable#toSAX(org.xml.sax.ContentHandler)
     */
    public void toSAX(ContentHandler handler) throws SAXException {
        AttributesImpl atts = new AttributesImpl();
        if (name != null && name.length() > 0) {
            atts.addAttribute("", ATT_NAME, ATT_NAME, "CDATA", name);
        }
        String element = getElement();
        handler.startElement(CATEGORY, element, element, atts);
        if (content != null && content.length() > 0) {
            char[] chars = content.toCharArray();
            handler.characters(chars, 0, chars.length);
        }
        handler.endElement(CATEGORY, element, element);
    }
}

⏎ org/apache/fop/render/ps/extensions/PSSetPageDevice.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)