/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library 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 library 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 library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.shell.bjorne;
import java.util.List;
import org.jnode.driver.console.CompletionInfo;
import org.jnode.shell.CommandRunnable;
import org.jnode.shell.CommandShell;
import org.jnode.shell.CommandThread;
import org.jnode.shell.CommandThreadImpl;
import org.jnode.shell.Completable;
import org.jnode.shell.ShellException;
import org.jnode.shell.help.CompletionException;
public class ListCommandNode extends CommandNode implements Completable {
private final CommandNode[] commands;
public ListCommandNode(int nodeType, List<? extends CommandNode> commands) {
super(nodeType);
this.commands = commands.toArray(new CommandNode[commands.size()]);
}
public CommandNode[] getCommands() {
return commands;
}
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("ListCommand{").append(super.toString());
sb.append(",commands=");
appendArray(sb, commands);
sb.append('}');
return sb.toString();
}
@Override
public int execute(BjorneContext context) throws ShellException {
int listFlags = getFlags();
int rc = 0;
if ((listFlags & BjorneInterpreter.FLAG_PIPE) != 0) {
BjornePipeline pipeline = buildPipeline(context);
try {
pipeline.wire();
rc = pipeline.run(context.getShell());
} finally {
pipeline.closeStreams();
}
} else {
int nt = getNodeType();
try {
if (nt == BjorneInterpreter.CMD_SUBSHELL) {
// This simulates creating a 'subshell'.
context = new BjorneContext(context);
context.evaluateRedirectionsAndPushHolders(getRedirects());
} else if (nt == BjorneInterpreter.CMD_BRACE_GROUP) {
context.evaluateRedirectionsAndPushHolders(getRedirects());
}
for (CommandNode command : commands) {
int commandFlags = command.getFlags();
if ((commandFlags & BjorneInterpreter.FLAG_AND_IF) != 0) {
if (context.getLastReturnCode() != 0) {
break;
}
}
if ((commandFlags & BjorneInterpreter.FLAG_OR_IF) != 0) {
if (context.getLastReturnCode() == 0) {
break;
}
}
rc = command.execute(context);
}
} finally {
if (nt == BjorneInterpreter.CMD_SUBSHELL || nt == BjorneInterpreter.CMD_BRACE_GROUP) {
context.popHolders();
}
}
}
if ((listFlags & BjorneInterpreter.FLAG_BANG) != 0) {
rc = (rc == 0) ? -1 : 0;
}
return rc;
}
@Override
public CommandThread fork(CommandShell shell, final BjorneContext context)
throws ShellException {
CommandRunnable cr = new BjorneSubshellRunner(context) {
@Override
public int doRun() throws ShellException {
return ListCommandNode.this.execute(context);
}
};
return new CommandThreadImpl(cr, context.getName());
}
public BjornePipeline buildPipeline(BjorneContext context) throws ShellException {
int len = commands.length;
BjornePipeline pipeline = new BjornePipeline(len);
for (int i = 0; i < len; i++) {
CommandNode commandNode = commands[i];
BjorneContext childContext = new BjorneContext(context);
pipeline.addStage(commandNode, childContext);
}
return pipeline;
}
@Override
public void complete(CompletionInfo completions, CommandShell shell) throws CompletionException {
// TODO Auto-generated method stub
}
}