impl.org.controlsfx.version.VersionChecker Maven / Gradle / Ivy

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High quality UI controls and other tools to complement the core JavaFX distribution
There is a newer version: 11.2.1
/**
 * Copyright (c) 2014, 2018 ControlsFX
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *     * Neither the name of ControlsFX, any associated website, nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL CONTROLSFX BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package impl.org.controlsfx.version;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;

public class VersionChecker {
    
    private static final String javaFXVersion;
    private static final String controlsFXSpecTitle;
    private static final String controlsFXSpecVersion;
    private static final String controlsFXImpVersion;
    
    private static final Package controlsFX;
    
    private static Properties props;
    
    static {
        controlsFX = VersionChecker.class.getPackage();
        
        javaFXVersion         = System.getProperty("javafx.version");
        controlsFXSpecTitle   = getControlsFXSpecificationTitle();
        controlsFXSpecVersion = getControlsFXSpecificationVersion();
        controlsFXImpVersion  = getControlsFXImplementationVersion();
    }

    private VersionChecker() {
        // no-op
    }
    
    public static void doVersionCheck() {
        // We keep ControlsFX bleeding edge, and we try to let our version numbers
        // do the talking. However, we can't always ensure people do the right 
        // thing, so here we will check the ControlsFX and JavaFX version numbers,
        // to ensure they match.
        // Fortunately, our system is simple at present: we use the
        // 'controlsFXSpec' value to represent what we require. In other
        // words, ControlsFX 8.0.0 has controlsFXSpecVersion of 8.0.0, so it will work on 
        // JavaFX 8.0.0 and later versions. Conversely, ControlsFX 8.0.6_20 has a controlsFXSpecVersion of
        // 8.0.20 (controlsFXSpecTitle of Java 8u20), which means that ControlsFX will only work on JavaFX 8u20
        // and later versions.
        
        if (controlsFXSpecVersion == null) {
            // FIXME temporary fix to allow ControlsFX to work when run inside
            // an IDE (i.e. for developers of ControlsFX).
            return;
        }
        
        Comparable[] splitSpecVersion = toComparable(controlsFXSpecVersion.split("\\.")); //$NON-NLS-1$
        
        // javaFXVersion may contain '-' like 8.0.20-ea so replace them with '.' before splitting.
        Comparable[] splitJavaVersion = toComparable(javaFXVersion.replace('-', '.').split("\\.")); //$NON-NLS-1$

        boolean notSupportedVersion = false;

        // Check Major Version
        if (splitSpecVersion[0].compareTo(splitJavaVersion[0]) > 0) {
            notSupportedVersion = true;
        } else if (splitSpecVersion[0].compareTo(splitJavaVersion[0]) == 0) {
            // Check Minor Version
            // FIXME: JDK-9
            // Doesn't work with JDK 9
            /*if (splitSpecVersion[1].compareTo(splitJavaVersion[2])>0) {
                notSupportedVersion = true;
            }*/
        }

        if (notSupportedVersion) {
            throw new RuntimeException("ControlsFX Error: ControlsFX " + //$NON-NLS-1$
                controlsFXImpVersion + " requires at least " + controlsFXSpecTitle); //$NON-NLS-1$
        }
    }

    private static Comparable[] toComparable(String[] tokens) {
        Comparable[] ret= new Comparable[tokens.length];
        for (int i = 0; i