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/**
 * OW2 FraSCAti FScript
 * Copyright (C) 2010 INRIA, University of Lille 1
 *
 * 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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Contact: [email protected]
 *
 * Author: Pierre-Charles David
 *
 * Contributor(s): Christophe Demarey
 *                 Philippe Merle
 *
 */
package org.ow2.frascati.fscript.console.commands;

import static java.text.MessageFormat.format;

import org.objectweb.fractal.api.Component;
import org.objectweb.fractal.fscript.Library;
import org.objectweb.fractal.fscript.ast.UserProcedure;
import org.objectweb.fractal.fscript.procedures.NativeProcedure;
import org.objectweb.fractal.fscript.procedures.Procedure;
import org.objectweb.fractal.util.ContentControllerHelper;

/**
 * This command prints out information about the procedure whose name is given in
 * parameter.
 */
public class InfoCommand
     extends AbstractCommand
{
    public final void execute(String procName) throws Exception
    {
        Component lib = ContentControllerHelper.getSubComponentByName(fscript.getFraSCAtiScriptComposite(), "library");
        if (lib == null) {
            showWarning("Unable to locate the library component.");
            showWarning("The engine used is not compatible with this command.");
            return;
        }
        Procedure proc = ((Library) lib.getFcInterface("library")).lookup(procName);
        if (proc == null) {
            showWarning("Unknown procedure '" + procName + "'.");
            return;
        }
        String impl = (proc instanceof NativeProcedure) ? "Native" : "User-defined";
        String kind = proc.isPureFunction() ? "function" : "action";
        String def = null;
        if (proc instanceof NativeProcedure) {
            def = proc.getClass().getName();
        } else {
            def = ((UserProcedure) proc).getSourceLocation().toString();
        }
        showMessage(format("{0} {1} \"" + proc.getName() + "\" is defined in " + def, impl,
                kind, def));
        showMessage("Signature: " + proc.getName() + proc.getSignature().toString());
        if (proc instanceof UserProcedure) {
            UserProcedure up = (UserProcedure) proc;
            showMessage("AST: " + up.toString());
        }
    }
}