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/area/DestinationData.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: DestinationData.java 1610839 2014-07-15 20:25:58Z vhennebert $ */

package org.apache.fop.area;

import java.util.List;

import org.apache.fop.fo.extensions.destination.Destination;
/**
 * An instance of this class is named destination from fox:destination
 */
public class DestinationData extends AbstractOffDocumentItem implements Resolvable {

    // ID Reference for this bookmark
    private String idRef;

    // String Array to satisfy getIDRefs method
    private String[] idRefs;

    // PageViewport that the idRef item refers to
    private PageViewport pageRef;

    /**
     * Create a new pdf destination data object.
     * This is used by the destination to create a data object
     * with a idref.  During processing, this idref will be
     * subsequently resolved to a particular PageViewport.
     *
     * @param destination the fo:bookmark object
     */
    public DestinationData(Destination destination) {
        this(destination.getInternalDestination());
    }

    /**
     * Create a new named destination.
     * @param idRef the id reference of the destination
     */
    public DestinationData(String idRef) {
        this.idRef = idRef;
        this.idRefs = new String[] {idRef};
    }

    /**
     * Get the idref for this destination
     *
     * @return the idref for the destination
     */
    public String getIDRef() {
        return idRef;
    }

    /** {@inheritDoc} */
    public String[] getIDRefs() {
        return idRefs;
    }

    /**
     * Get the PageViewport object that this destination refers to
     *
     * @return the PageViewport that this destination points to
     */
    public PageViewport getPageViewport() {
        return pageRef;
    }

    /**
     * Check if this resolvable object has been resolved.
     * For now, just return true.
     * To do: Find a way to determine whether the destination has been resolved.
     *
     * @return true if this object has been resolved
     */
    public boolean isResolved() {
        return true;
    }

    /**
     * Resolves the idref of this object by getting the PageViewport
     * object that corresponds to the IDRef
     *
     * {@inheritDoc}
     * TODO check to make sure it works if multiple bookmark-items
     * have the same idref
     */
    public void resolveIDRef(String id, List<PageViewport> pages) {
        pageRef = pages.get(0);
        // TODO get rect area of id on page
    }

    /** {@inheritDoc} */
    public String getName() {
        return "Destination";
    }

}

⏎ org/apache/fop/area/DestinationData.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)