org.apache.geronimo.genesis.plugins.tools.RequireJavaVersionMojo Maven / Gradle / Ivy

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/*
 * 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.
 */

package org.apache.geronimo.genesis.plugins.tools;

import org.apache.geronimo.genesis.MojoSupport;

import org.apache.commons.lang.SystemUtils;

import org.apache.maven.plugin.MojoFailureException;

/**
 * Forces the build to fail if the version of Java is not compatible.
 *
 * @goal require-java-version
 * @phase validate
 *
 * @version $Rev: 467523 $ $Date: 2006-10-24 17:33:32 -0700 (Tue, 24 Oct 2006) $
 */
public class RequireJavaVersionMojo
    extends MojoSupport
{
    /**
     * Specify the required version of Java (1.1, 1.2, 1.3, 1.4, 1.5).
     *
     * Can specify a suffix of '+' to allow any version equal to or newer or '*'
     * to allow versions in the same group.
     *
     * For example, version=1.4+ would be allowed on a JDK 1.5 VM, version=1.5*
     * would allow any JDK 1.5, but not JDK 1.6.
     *
     * @parameter
     * @required
     */
    private String version = null;
    
    /**
     * Flag to skip the version check.
     *
     * @parameter expression="${requirejavaversion.skip}" default-value="false"
     */
    private boolean skip = false;
    
    protected void doExecute() throws Exception {
        if (skip) {
            log.warn("Skipping Java version check");
        }
        
        version = version.trim();
        
        if (version.endsWith("*")) {
            version = version.substring(0, version.length() - 1).trim();
            
            log.debug("Checking Java version is in the same group as: " + version);
            
            String tmp = SystemUtils.JAVA_VERSION_TRIMMED;
            
            log.debug("Requested version: " + tmp);
            log.debug("JVM version: " + SystemUtils.JAVA_VERSION_FLOAT);
            
            if (!tmp.startsWith(version)) {
                throw new MojoFailureException("This build requires Java version " + version + 
                    " or a greater version in the same group, found version: " + 
                    SystemUtils.JAVA_VERSION_FLOAT);
            }
        }
        else if (version.endsWith("+")) {
            version = version.substring(0, version.length() - 1).trim();
            
            log.debug("Checking Java version is greater than: " + version);
            
            float tmp = Float.parseFloat(version);
            
            log.debug("Requested version: " + tmp);
            log.debug("JVM version: " + SystemUtils.JAVA_VERSION_FLOAT);
            
            if (tmp > SystemUtils.JAVA_VERSION_FLOAT) {
                throw new MojoFailureException("This build requires Java version " + version + 
                    " or greater, found version: " + SystemUtils.JAVA_VERSION_FLOAT);
            }
        }
        else {
            log.debug("Checking Java version is equal to: " + version);
            
            float tmp = Float.parseFloat(version);
            
            log.debug("Requested version: " + tmp);
            log.debug("JVM version: " + SystemUtils.JAVA_VERSION_FLOAT);
            
            if (tmp != SystemUtils.JAVA_VERSION_FLOAT) {
                throw new MojoFailureException("This build requires Java version " + version + 
                    ", found version: " + SystemUtils.JAVA_VERSION_FLOAT);
            }
        }
    }
}