com.sshtools.synergy.nio.PomVersion Maven / Gradle / Ivy

Go to download
/**
 * (c) 2002-2021 JADAPTIVE Limited. All Rights Reserved.
 *
 * This file is part of the Maverick Synergy Java SSH API.
 *
 * Maverick Synergy is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Maverick Synergy is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Maverick Synergy.  If not, see .
 */
package com.sshtools.synergy.nio;

import java.io.File;
import java.io.InputStream;
import java.util.Properties;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;

public class PomVersion {

	static String version;
	
	public static String getVersion() {
		return getVersion("maverick-ng-common");
	}

	
	private static String getVersion(String artifactId) {
		
	    if (version != null) {
	        return version;
	    }

	    // try to load from maven properties first
	    try {
	        Properties p = new Properties();
	        InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("META-INF/maven/com.sshtools/" + artifactId + "/pom.properties");
	        if(is == null) {
		        is = PomVersion.class.getResourceAsStream("/META-INF/maven/com.sshtools/" + artifactId + "/pom.properties");
	        }
	        if (is != null) {
	            p.load(is);
	            version = p.getProperty("version", "");
	        }
	    } catch (Exception e) {
	        // ignore
	    }

	    // fallback to using Java API
	    if (version == null) {
	        Package aPackage = PomVersion.class.getPackage();
	        if (aPackage != null) {
	            version = aPackage.getImplementationVersion();
	            if (version == null) {
	                version = aPackage.getSpecificationVersion();
	            }
	        }
	    }

	    if (version == null) {
	    	try {
	    		DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
	            DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
	            Document doc = docBuilder.parse (new File("pom.xml"));
	            version = doc.getDocumentElement().getElementsByTagName("version").item(0).getTextContent();
	    	} catch (Exception e) {
				version = "DEV_VERSION";
			} 
	        
	    }

	    return version;
	}
}