001package org.apache.maven.plugins.enforcer; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.util.Arrays; 023import java.util.Iterator; 024import java.util.List; 025 026import org.apache.commons.lang3.SystemUtils; 027import org.apache.maven.artifact.versioning.ArtifactVersion; 028import org.apache.maven.artifact.versioning.DefaultArtifactVersion; 029import org.apache.maven.enforcer.rule.api.EnforcerRuleException; 030import org.apache.maven.enforcer.rule.api.EnforcerRuleHelper; 031import org.apache.maven.plugin.logging.Log; 032import org.codehaus.plexus.util.StringUtils; 033 034/** 035 * This rule checks that the Java version is allowed. 036 * 037 * @author <a href="mailto:brianf@apache.org">Brian Fox</a> 038 */ 039public class RequireJavaVersion 040 extends AbstractVersionEnforcer 041{ 042 @Override 043 public void execute( EnforcerRuleHelper helper ) 044 throws EnforcerRuleException 045 { 046 String javaVersion = SystemUtils.JAVA_VERSION; 047 Log log = helper.getLog(); 048 049 log.debug( "Detected Java String: '" + javaVersion + "'" ); 050 javaVersion = normalizeJDKVersion( javaVersion ); 051 log.debug( "Normalized Java String: '" + javaVersion + "'" ); 052 053 ArtifactVersion detectedJdkVersion = new DefaultArtifactVersion( javaVersion ); 054 055 log.debug( "Parsed Version: Major: " + detectedJdkVersion.getMajorVersion() + " Minor: " 056 + detectedJdkVersion.getMinorVersion() + " Incremental: " + detectedJdkVersion.getIncrementalVersion() 057 + " Build: " + detectedJdkVersion.getBuildNumber() + " Qualifier: " + detectedJdkVersion.getQualifier() ); 058 059 enforceVersion( helper.getLog(), "JDK", getVersion(), detectedJdkVersion ); 060 } 061 062 /** 063 * Converts a jdk string from 1.5.0-11b12 to a single 3 digit version like 1.5.0-11 064 * 065 * @param theJdkVersion to be converted. 066 * @return the converted string. 067 */ 068 public static String normalizeJDKVersion( String theJdkVersion ) 069 { 070 071 theJdkVersion = theJdkVersion.replaceAll( "_|-", "." ); 072 String tokenArray[] = StringUtils.split( theJdkVersion, "." ); 073 List<String> tokens = Arrays.asList( tokenArray ); 074 StringBuilder buffer = new StringBuilder( theJdkVersion.length() ); 075 076 Iterator<String> iter = tokens.iterator(); 077 for ( int i = 0; i < tokens.size() && i < 4; i++ ) 078 { 079 String section = iter.next(); 080 section = section.replaceAll( "[^0-9]", "" ); 081 082 if ( StringUtils.isNotEmpty( section ) ) 083 { 084 buffer.append( Integer.parseInt( section ) ); 085 086 if ( i != 2 ) 087 { 088 buffer.append( '.' ); 089 } 090 else 091 { 092 buffer.append( '-' ); 093 } 094 } 095 } 096 097 String version = buffer.toString(); 098 version = StringUtils.stripEnd( version, "-" ); 099 return StringUtils.stripEnd( version, "." ); 100 } 101}