http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * 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: Version.java 1305467 2012-03-26 17:39:20Z vhennebert $ */

package org.apache.fop.pdf;


A version of PDF. Values are ordered such that compareTo() gives sensible results (e.g., V1_4.compareTo(V1_5) < 0). 
/**
 * A version of PDF. Values are ordered such that compareTo() gives sensible
 * results (e.g., {@code V1_4.compareTo(V1_5) < 0}).
 */
public enum Version {
    
PDF v1 
/** PDF v1 */
    V1_0("1.0"),
    
PDF v1.1 
/** PDF v1.1 */
    V1_1("1.1"),
    
PDF v1.2 
/** PDF v1.2 */
    V1_2("1.2"),
    
PDF v1.3 
/** PDF v1.3 */
    V1_3("1.3"),
    
PDF v1.4 
/** PDF v1.4 */
    V1_4("1.4"),
    
PDF v1.5 
/** PDF v1.5 */
    V1_5("1.5"),
    
PDF v1.6 
/** PDF v1.6 */
    V1_6("1.6"),
    
PDF v1.7 
/** PDF v1.7 */
    V1_7("1.7");

    private String version;

    private Version(String version) {
        this.version = version;
    }

    
Given the PDF version as a String, returns the corresponding enumerated type. The
String should be in the format "1.x" for PDF v1.x.

Params:
  • version – a version number
Throws:
Returns:the corresponding Version instance
/**
     * Given the PDF version as a String, returns the corresponding enumerated type. The
     * String should be in the format "1.x" for PDF v1.x.
     *
     * @param version a version number
     * @return the corresponding Version instance
     * @throws IllegalArgumentException if the argument does not correspond to any
     * existing PDF version
     */
    public static Version getValueOf(String version) {
        for (Version pdfVersion : Version.values()) {
            if (pdfVersion.toString().equals(version)) {
                return pdfVersion;
            }
        }
        throw new IllegalArgumentException("Invalid PDF version given: " + version);
    }

    @Override
    public String toString() {
        return version;
    }
}