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/fo/expr/FromNearestSpecifiedValueFunction.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: FromNearestSpecifiedValueFunction.java 1479969 2013-05-07 16:23:13Z vhennebert $ */

package org.apache.fop.fo.expr;

import org.apache.fop.fo.FOPropertyMapping;
import org.apache.fop.fo.properties.Property;

/**
 * Class modelling the from-nearest-specified-value function. See Sec. 5.10.4
 * of the XSL-FO standard.
 */
public class FromNearestSpecifiedValueFunction extends FunctionBase {

    /** {@inheritDoc} */
    public int getRequiredArgsCount() {
        return 0;
    }

    @Override
    /** {@inheritDoc} */
    public int getOptionalArgsCount() {
        return 1;
    }

    @Override
    /** {@inheritDoc} */
    public Property getOptionalArgDefault(int index, PropertyInfo pi) throws PropertyException {
        if (index == 0) {
            return getPropertyName(pi);
        } else {
            return super.getOptionalArgDefault(index, pi);
        }
    }

    /** {@inheritDoc} */
    public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException {
        String propName = args[0].getString();
        if (propName == null) {
            throw new PropertyException(
                    "Incorrect parameter to from-nearest-specified-value function");
        }
        // NOTE: special cases for shorthand property
        // Should return COMPUTED VALUE
        int propId = FOPropertyMapping.getPropertyId(propName);
        if (propId < 0) {
            throw new PropertyException(
                    "Unknown property name used with inherited-property-value function: "
                        + propName);
        }
        return pInfo.getPropertyList().getNearestSpecified(propId);
    }

}

⏎ org/apache/fop/fo/expr/FromNearestSpecifiedValueFunction.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)