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.impl.java;
020
021 import org.crsh.cli.descriptor.Format;
022 import org.crsh.cli.impl.descriptor.IntrospectionException;
023 import org.crsh.shell.ErrorKind;
024 import org.crsh.shell.impl.command.spi.CommandException;
025 import org.crsh.shell.impl.command.ShellSession;
026 import org.crsh.shell.impl.command.spi.Command;
027 import org.crsh.lang.spi.CommandResolution;
028
029 import java.io.IOException;
030 import java.util.Collections;
031 import java.util.List;
032 import java.util.Set;
033
034 /** @author Julien Viet */
035 public class JavaCompiler implements org.crsh.lang.spi.Compiler {
036
037 /** . */
038 private static final Set<String> EXT = Collections.singleton("java");
039
040 /** . */
041 private final org.crsh.lang.impl.java.Compiler compiler;
042
043 /** . */
044 private final ClassLoader loader;
045
046 JavaCompiler(ClassLoader loader) {
047 this.compiler = new org.crsh.lang.impl.java.Compiler(loader);
048 this.loader = loader;
049 }
050
051 public Set<String> getExtensions() {
052 return EXT;
053 }
054
055 public CommandResolution compileCommand(String name, byte[] source) throws CommandException, NullPointerException {
056 String script = new String(source);
057 List<JavaClassFileObject> classFiles;
058 try {
059 classFiles = compiler.compile(name, script);
060 }
061 catch (IOException e) {
062 throw new CommandException(ErrorKind.INTERNAL, "Could not access command", e);
063 }
064 catch (CompilationFailureException e) {
065 throw new CommandException(ErrorKind.INTERNAL, "Could not compile command", e);
066 }
067 for (JavaClassFileObject classFile : classFiles) {
068 String className = classFile.getClassName();
069 String simpleName = className.substring(className.lastIndexOf('.') + 1);
070 if (simpleName.equals(name)) {
071 LoadingClassLoader loader = new LoadingClassLoader(this.loader, classFiles);
072 try {
073 Class<?> clazz = loader.loadClass(classFile.getClassName());
074 final ClassShellCommand command;
075 try {
076 command = new ClassShellCommand(clazz);
077 }
078 catch (IntrospectionException e) {
079 throw new CommandException(ErrorKind.INTERNAL, "Invalid cli annotations", e);
080 }
081 final String description = command.describe(name, Format.DESCRIBE);
082 return new CommandResolution() {
083 @Override
084 public String getDescription() {
085 return description;
086 }
087 @Override
088 public Command<Object> getCommand() throws CommandException {
089 return command;
090 }
091 };
092 }
093 catch (ClassNotFoundException e) {
094 throw new CommandException(ErrorKind.INTERNAL, "Command cannot be loaded", e);
095 }
096 }
097 }
098 throw new CommandException(ErrorKind.INTERNAL, "Command class not found");
099 }
100
101 public void init(ShellSession session) {
102 //
103 }
104
105 public void destroy(ShellSession session) {
106 //
107 }
108
109 public String doCallBack(ShellSession session, String name, String defaultValue) {
110 throw new UnsupportedOperationException("not yet implemented");
111 }
112 }