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1 /* 2 * 3 * ==================================================================== 4 * 5 * The Apache Software License, Version 1.1 6 * 7 * Copyright (c) 1999 The Apache Software Foundation. All rights 8 * reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in 19 * the documentation and/or other materials provided with the 20 * distribution. 21 * 22 * 3. The end-user documentation included with the redistribution, if 23 * any, must include the following acknowlegement: 24 * "This product includes software developed by the 25 * Apache Software Foundation (http://www.apache.org/)." 26 * Alternately, this acknowlegement may appear in the software itself, 27 * if and wherever such third-party acknowlegements normally appear. 28 * 29 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software 30 * Foundation" must not be used to endorse or promote products derived 31 * from this software without prior written permission. For written 32 * permission, please contact apache@apache.org. 33 * 34 * 5. Products derived from this software may not be called "Apache" 35 * nor may "Apache" appear in their names without prior written 36 * permission of the Apache Group. 37 * 38 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 39 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 41 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 44 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 45 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 46 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 47 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 48 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 49 * SUCH DAMAGE. 50 * ==================================================================== 51 * 52 * This software consists of voluntary contributions made by many 53 * individuals on behalf of the Apache Software Foundation. For more 54 * information on the Apache Software Foundation, please see 55 * <http://www.apache.org/>;. 56 * 57 */ 58 59 package org.apache.commons.jelly.tags.antlr; 60 61 import org.apache.commons.jelly.XMLOutput; 62 import org.apache.commons.jelly.TagSupport; 63 import org.apache.commons.jelly.MissingAttributeException; 64 import org.apache.commons.jelly.JellyException; 65 66 import antlr.Tool; 67 68 import java.io.File; 69 import java.io.FileReader; 70 import java.io.BufferedReader; 71 import java.security.Permission; 72 import java.util.List; 73 import java.util.ArrayList; 74 import java.util.Iterator; 75 76 public class AntlrTag extends TagSupport 77 { 78 private List grammars; 79 private File outputDir; 80 81 public AntlrTag() 82 { 83 this.grammars = new ArrayList( 1 ); 84 } 85 86 87 // Tag interface 88 //------------------------------------------------------------------------- 89 90 /*** 91 * Evaluate the body to register all the various goals and pre/post conditions 92 * then run all the current targets 93 */ 94 public void doTag(final XMLOutput output) throws Exception 95 { 96 if ( this.outputDir == null ) 97 { 98 throw new MissingAttributeException( "outputDir" ); 99 } 100 101 invokeBody( output ); 102 103 Iterator grammarIter = this.grammars.iterator(); 104 String eachGrammar = null; 105 106 String sourceDir = (String) getContext().getVariable( "maven.antlr.src.dir" ); 107 File grammar = null; 108 109 while ( grammarIter.hasNext() ) 110 { 111 eachGrammar = ((String) grammarIter.next()).trim(); 112 113 grammar = new File( sourceDir, 114 eachGrammar ); 115 116 File generated = getGeneratedFile( grammar.getPath() ); 117 118 if ( generated.exists() ) 119 { 120 if ( generated.lastModified() > grammar.lastModified() ) 121 { 122 // it's more recent, skip. 123 return; 124 } 125 } 126 127 if ( ! generated.getParentFile().exists() ) 128 { 129 generated.getParentFile().mkdirs(); 130 } 131 132 String[] args = new String[] 133 { 134 "-o", 135 generated.getParentFile().getPath(), 136 grammar.getPath(), 137 }; 138 139 SecurityManager oldSm = System.getSecurityManager(); 140 141 System.setSecurityManager( NoExitSecurityManager.INSTANCE ); 142 143 try 144 { 145 Tool.main( args ); 146 } 147 catch (SecurityException e) 148 { 149 if ( ! e.getMessage().equals( "exitVM-0" ) ) 150 { 151 throw new JellyException( e ); 152 } 153 } 154 finally 155 { 156 System.setSecurityManager( oldSm ); 157 } 158 } 159 } 160 161 protected File getGeneratedFile(String grammar) throws JellyException 162 { 163 File grammarFile = new File( grammar ); 164 165 String generatedFileName = null; 166 167 String className = null; 168 String packageName = ""; 169 170 try { 171 172 BufferedReader in = new BufferedReader(new FileReader(grammar)); 173 174 String line; 175 while ((line = in.readLine()) != null) { 176 line = line.trim(); 177 int extendsIndex = line.indexOf(" extends "); 178 if (line.startsWith("class ") && extendsIndex > -1) { 179 generatedFileName = line.substring(6, extendsIndex).trim(); 180 break; 181 } 182 else if ( line.startsWith( "package" ) ) { 183 packageName = line.substring( 8 ).trim(); 184 } 185 } 186 in.close(); 187 } catch (Exception e) { 188 throw new JellyException("Unable to determine generated class", 189 e); 190 } 191 if (generatedFileName == null) { 192 return null; 193 } 194 195 File genFile = null; 196 197 if ( "".equals( packageName ) ) 198 { 199 genFile = new File( getOutputDir(), 200 generatedFileName + ".java" ); 201 } 202 else 203 { 204 String packagePath = packageName.replace( '.', 205 File.separatorChar ); 206 207 packagePath = packagePath.replace( ';', 208 File.separatorChar ); 209 210 genFile = new File( new File( getOutputDir(), packagePath), 211 generatedFileName + ".java" ); 212 } 213 214 return genFile; 215 } 216 217 void addGrammar(String grammar) 218 { 219 this.grammars.add( grammar ); 220 } 221 222 public void setOutputDir(File outputDir) 223 { 224 this.outputDir = outputDir; 225 } 226 227 public File getOutputDir() 228 { 229 return this.outputDir; 230 } 231 } 232 233 class NoExitSecurityManager extends SecurityManager 234 { 235 static final NoExitSecurityManager INSTANCE = new NoExitSecurityManager(); 236 237 private NoExitSecurityManager() 238 { 239 } 240 241 public void checkPermission(Permission permission) 242 { 243 } 244 245 public void checkExit(int status) 246 { 247 throw new SecurityException( "exitVM-" + status ); 248 } 249 }

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