/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.lang.impl.groovy;
import groovy.lang.GroovyShell;
import org.crsh.cli.impl.Delimiter;
import org.crsh.cli.impl.completion.CompletionMatch;
import org.crsh.cli.spi.Completion;
import org.crsh.command.CommandContext;
import org.crsh.lang.spi.Language;
import org.crsh.lang.spi.ReplResponse;
import org.crsh.shell.ErrorKind;
import org.crsh.shell.impl.command.InvocationContextImpl;
import org.crsh.shell.impl.command.ShellSession;
import org.crsh.shell.impl.command.spi.CommandException;
import org.crsh.shell.impl.command.spi.CommandInvoker;
import org.crsh.lang.spi.Repl;
import org.crsh.cli.impl.line.LineParser;
import java.io.IOException;
/**
* Groovy REPL implementation.
*
* @author Julien Viet
*/
public class GroovyRepl implements Repl {
/** . */
final GroovyLanguage lang;
public GroovyRepl(GroovyLanguage lang) {
// Force to load Groovy here or fail
Object o = GroovyShell.class;
this.lang = lang;
}
@Override
public Language getLanguage() {
return lang;
}
@Override
public String getDescription() {
return "The Groovy repl provides a Groovy interpreter able to interact with shell commands";
}
public ReplResponse eval(final ShellSession session, final String r2) {
GroovyLineEscaper foo = new GroovyLineEscaper();
LineParser parser = new LineParser(foo);
parser.append(r2);
final String request = foo.buffer.toString();
//
CommandInvoker<Void, Object> invoker = new CommandInvoker<Void, Object>() {
public void provide(Void element) throws IOException {
throw new UnsupportedOperationException("Should not be invoked");
}
public Class<Void> getConsumedType() {
return Void.class;
}
public void flush() throws IOException {
}
public Class<Object> getProducedType() {
return Object.class;
}
CommandContext<Object> consumer;
public void open(CommandContext<? super Object> consumer) throws IOException, CommandException {
this.consumer = (CommandContext<Object>)consumer;
GroovyShell shell = GroovyCompiler.getGroovyShell(session);
ShellBinding binding = (ShellBinding)shell.getContext();
binding.setCurrent(new InvocationContextImpl<Object>(this.consumer));
Object o;
try {
o = shell.evaluate(request);
}
finally {
binding.setCurrent(null);
}
if (o != null) {
try {
consumer.provide(o);
}
catch (IOException e) {
throw e;
}
catch (CommandException e) {
throw e;
}
catch (Exception e) {
throw new CommandException(ErrorKind.EVALUATION, "An error occured during the evalution of '" + request + "'", e);
}
}
}
public void close() throws IOException, CommandException {
try {
consumer.flush();
consumer.close();
}
catch (Exception e) {
throw new CommandException(ErrorKind.EVALUATION, "An error occured during the evalution of '" + request + "'", e);
}
}
};
return new ReplResponse.Invoke(invoker);
}
public CompletionMatch complete(ShellSession session, String prefix) {
return new CompletionMatch(Delimiter.EMPTY, Completion.create());
}
}