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.groovy;
020
021 import groovy.lang.GroovyShell;
022 import org.crsh.cli.impl.Delimiter;
023 import org.crsh.cli.impl.completion.CompletionMatch;
024 import org.crsh.cli.spi.Completion;
025 import org.crsh.command.CommandContext;
026 import org.crsh.lang.spi.Language;
027 import org.crsh.lang.spi.ReplResponse;
028 import org.crsh.shell.ErrorKind;
029 import org.crsh.shell.impl.command.InvocationContextImpl;
030 import org.crsh.shell.impl.command.ShellSession;
031 import org.crsh.shell.impl.command.spi.CommandException;
032 import org.crsh.shell.impl.command.spi.CommandInvoker;
033 import org.crsh.lang.spi.Repl;
034 import org.crsh.cli.impl.line.LineParser;
035
036 import java.io.IOException;
037
038 /**
039 * Groovy REPL implementation.
040 *
041 * @author Julien Viet
042 */
043 public class GroovyRepl implements Repl {
044
045 /** . */
046 final GroovyLanguage lang;
047
048 public GroovyRepl(GroovyLanguage lang) {
049 // Force to load Groovy here or fail
050 Object o = GroovyShell.class;
051 this.lang = lang;
052 }
053
054 @Override
055 public Language getLanguage() {
056 return lang;
057 }
058
059 @Override
060 public String getDescription() {
061 return "The Groovy repl provides a Groovy interpreter able to interact with shell commands";
062 }
063
064 public ReplResponse eval(final ShellSession session, final String r2) {
065
066
067 GroovyLineEscaper foo = new GroovyLineEscaper();
068 LineParser parser = new LineParser(foo);
069 parser.append(r2);
070 final String request = foo.buffer.toString();
071
072
073 //
074 CommandInvoker<Void, Object> invoker = new CommandInvoker<Void, Object>() {
075 public void provide(Void element) throws IOException {
076 throw new UnsupportedOperationException("Should not be invoked");
077 }
078 public Class<Void> getConsumedType() {
079 return Void.class;
080 }
081 public void flush() throws IOException {
082 }
083 public Class<Object> getProducedType() {
084 return Object.class;
085 }
086 CommandContext<Object> consumer;
087 public void open(CommandContext<? super Object> consumer) throws IOException, CommandException {
088 this.consumer = (CommandContext<Object>)consumer;
089 GroovyShell shell = GroovyCompiler.getGroovyShell(session);
090 ShellBinding binding = (ShellBinding)shell.getContext();
091 binding.setCurrent(new InvocationContextImpl<Object>(this.consumer));
092 Object o;
093 try {
094 o = shell.evaluate(request);
095 }
096 finally {
097 binding.setCurrent(null);
098 }
099 if (o != null) {
100 try {
101 consumer.provide(o);
102 }
103 catch (IOException e) {
104 throw e;
105 }
106 catch (CommandException e) {
107 throw e;
108 }
109 catch (Exception e) {
110 throw new CommandException(ErrorKind.EVALUATION, "An error occured during the evalution of '" + request + "'", e);
111 }
112 }
113 }
114 public void close() throws IOException, CommandException {
115 try {
116 consumer.flush();
117 consumer.close();
118 }
119 catch (Exception e) {
120 throw new CommandException(ErrorKind.EVALUATION, "An error occured during the evalution of '" + request + "'", e);
121 }
122 }
123 };
124 return new ReplResponse.Invoke(invoker);
125 }
126
127 public CompletionMatch complete(ShellSession session, String prefix) {
128 return new CompletionMatch(Delimiter.EMPTY, Completion.create());
129 }
130 }