001    /*
002     * Copyright (C) 2012 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    package org.crsh.lang.groovy;
020    
021    import groovy.lang.GroovyClassLoader;
022    import groovy.lang.GroovyCodeSource;
023    import groovy.lang.Script;
024    import org.codehaus.groovy.control.CompilationFailedException;
025    import org.codehaus.groovy.control.CompilerConfiguration;
026    import org.crsh.shell.impl.command.spi.CommandCreationException;
027    import org.crsh.util.ClassFactory;
028    import org.crsh.shell.ErrorType;
029    
030    /** @author Julien Viet */
031    class GroovyClassFactory<T> extends ClassFactory<T> {
032    
033      /** . */
034      private final ClassLoader baseLoader;
035    
036      /** . */
037      private final Class<T> baseClass;
038    
039      /** . */
040      final CompilerConfiguration config;
041    
042      GroovyClassFactory(ClassLoader baseLoader, Class<T> baseClass, Class<? extends Script> baseScriptClass) {
043        CompilerConfiguration config = new CompilerConfiguration();
044        config.setRecompileGroovySource(true);
045        config.setScriptBaseClass(baseScriptClass.getName());
046    
047        //
048        this.baseLoader = baseLoader;
049        this.baseClass = baseClass;
050        this.config = config;
051      }
052    
053      @Override
054      public Class<? extends T> parse(String name, String source) throws CommandCreationException {
055        Class<?> clazz;
056        try {
057          GroovyCodeSource gcs = new GroovyCodeSource(source, name, "/groovy/shell");
058          GroovyClassLoader gcl = new GroovyClassLoader(baseLoader, config);
059          clazz = gcl.parseClass(gcs, false);
060        }
061        catch (NoClassDefFoundError e) {
062          throw new CommandCreationException(name, ErrorType.INTERNAL, "Could not compile command script " + name, e);
063        }
064        catch (CompilationFailedException e) {
065          throw new CommandCreationException(name, ErrorType.INTERNAL, "Could not compile command script " + name, e);
066        }
067    
068        if (baseClass.isAssignableFrom(clazz)) {
069          return clazz.asSubclass(baseClass);
070        } else {
071          throw new CommandCreationException(name, ErrorType.INTERNAL, "Parsed script " + clazz.getName() +
072              " does not implements " + baseClass.getName());
073        }
074      }
075    }