/*
* $Id$
*
* 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 org.jnode.shell.CommandRunnable;
import org.jnode.shell.CommandShell;
import org.jnode.shell.CommandThread;
import org.jnode.shell.CommandThreadImpl;
import org.jnode.shell.ShellException;
public class CaseCommandNode extends CommandNode {
private final BjorneToken word;
private final CaseItemNode[] caseItems;
public CaseCommandNode(BjorneToken word, CaseItemNode[] caseItems) {
super(BjorneInterpreter.CMD_CASE);
this.word = word;
this.caseItems = caseItems;
}
public CaseItemNode[] getCaseItems() {
return caseItems;
}
public BjorneToken getWord() {
return word;
}
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("CaseCommand{").append(super.toString());
sb.append(",word=").append(word);
if (caseItems != null) {
sb.append(",caseItems=");
CommandNode.appendArray(sb, caseItems);
}
sb.append("}");
return sb.toString();
}
@Override
public int execute(BjorneContext context) throws ShellException {
try {
int rc = 0;
context.evaluateRedirectionsAndPushHolders(getRedirects());
CharSequence expandedWord = context.dollarBacktickExpand(word.text);
LOOP:
for (CaseItemNode caseItem : caseItems) {
for (BjorneToken pattern : caseItem.getPattern()) {
CharSequence pat = context.dollarBacktickExpand(pattern.text);
if (context.patternMatch(expandedWord, pat)) {
rc = caseItem.getBody().execute(context);
break LOOP;
}
}
}
if ((getFlags() & BjorneInterpreter.FLAG_BANG) != 0) {
rc = (rc == 0) ? -1 : 0;
}
return rc;
} finally {
context.popHolders();
}
}
@Override
public CommandThread fork(CommandShell shell, final BjorneContext context)
throws ShellException {
CommandRunnable cr = new BjorneSubshellRunner(context) {
@Override
public int doRun() throws ShellException {
return CaseCommandNode.this.execute(context);
}
};
return new CommandThreadImpl(cr, context.getName());
}
}