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/PDFAnnotList.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: PDFAnnotList.java 1661887 2015-02-24 11:23:44Z ssteiner $ */

package org.apache.fop.pdf;

// Java
import java.util.List;
import java.util.Set;

/**
 * class representing an object which is a list of annotations.
 *
 * This PDF object is a list of references to /Annot objects. So far we
 * are dealing only with links.
 */
public class PDFAnnotList extends PDFObject {

    /**
     * the /Annot objects
     */
    private List links = new java.util.Vector();

    /**
     * add an /Annot object of /Subtype /Link.
     *
     * @param link the PDFLink to add.
     */
    public void addAnnot(PDFObject link) {
        this.links.add(link);
    }

    /**
     * get the count of /Annot objects
     *
     * @return the number of links
     */
    public int getCount() {
        return this.links.size();
    }

    /**
     * {@inheritDoc}
     */
    public String toPDFString() {
        StringBuffer p = new StringBuffer(128);
        p.append("[\n");
        for (int i = 0; i < getCount(); i++) {
            p.append(((PDFObject)links.get(i)).referencePDF());
            p.append("\n");
        }
        p.append("]");
        return p.toString();
    }

    /*
     * example
     * [
     * 19 0 R
     * ]
     */

    @Override
    public void getChildren(Set<PDFObject> children) {
        PDFDictionary.getChildren(links, children);
    }
}

⏎ org/apache/fop/pdf/PDFAnnotList.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)