Package de.innovationgate.wgpublisher.expressions.tmlscript

Source Code of de.innovationgate.wgpublisher.expressions.tmlscript.TMLScriptRootScope

/*******************************************************************************
* Copyright 2009, 2010 Innovation Gate GmbH. All Rights Reserved.
*
* This file is part of the OpenWGA server platform.
*
* OpenWGA is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* In addition, a special exception is granted by the copyright holders
* of OpenWGA called "OpenWGA plugin exception". You should have received
* a copy of this exception along with OpenWGA in file COPYING.
* If not, see <http://www.openwga.com/gpl-plugin-exception>.
*
* OpenWGA 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenWGA in file COPYING.
* If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package de.innovationgate.wgpublisher.expressions.tmlscript;

import java.util.Iterator;

import org.apache.log4j.Logger;
import de.innovationgate.ext.org.mozilla.javascript.ErrorReporter;
import de.innovationgate.ext.org.mozilla.javascript.EvaluatorException;
import de.innovationgate.ext.org.mozilla.javascript.Scriptable;

import de.innovationgate.utils.WGUtils;
import de.innovationgate.webgate.api.WGAPIException;
import de.innovationgate.webgate.api.WGException;
import de.innovationgate.wgpublisher.webtml.utils.TMLContext;

public class TMLScriptRootScope extends ContextWrapper implements ErrorReporter {

    private TMLScriptRootScopeData _data;

    public TMLScriptRootScope(TMLScriptRootScopeData scopePrototype, TMLContext context) {
        super(scopePrototype.getRhinoScope(), context);
        _data = scopePrototype;
    }

    public Object getDefaultValue(Class hint) {
        return _data.getRhinoScope().getDefaultValue(hint);
    }

    public void warning(String message, String sourceName, int line, String lineSource, int lineOffset) {
        String msg = "TMLScript-Warning: " + message + " (at line " + line + ", column " + lineOffset + ")";
        getTmlContext().addwarning(msg, false);
    }

    public void error(String message, String sourceName, int line, String lineSource, int lineOffset) {
        throw runtimeError(message, sourceName, line, lineSource, lineOffset);

    }

    public EvaluatorException runtimeError(String message, String sourceName, int line, String lineSource, int lineOffset) {
        return new EvaluatorException(message, sourceName, line, lineSource, lineOffset);
    }

    public TMLScriptRootScopeData getData() {
        return _data;
    }

    public Scriptable getParentScope() {
        return _data;
    }

    protected boolean isMetaName(String arg0, Scriptable scope) {
        boolean superResult = super.isMetaName(arg0, scope);
        if (superResult == false) {
            return false;
        }

        // Look if the name is defined as top level object on RhinoScope. If so,
        // we may not serve it as meta
        if (_data.getRhinoScope().has(arg0, scope)) {
            return false;
        }

        if (_data.has(arg0, scope)) {
            return false;
        }

        return true;
    }

    public boolean has(String arg0, Scriptable arg1) {
        boolean result = super.has(arg0, arg1);
        if (result == true) {
            return true;
        }

        try {
            if (getTmlContext().getwgacore().getTmlscriptGlobalRegistry().isGlobalDefined(arg0, getTmlContext().designdb())) {
                return true;
            }
        }
        catch (WGException e) {
            Logger.getLogger("wga.tmlscript").error("Exception testing existence of TMLScript global " + arg0, e);
        }

        return false;
    }

    public Object get(String arg0, Scriptable arg1) {

        // Look if it is a TMLScript global
        try {
            TMLScriptGlobal global = getTmlContext().getwgacore().getTmlscriptGlobalRegistry().getGlobal(arg0, getTmlContext().designdb());
            if (global != null) {
                return provideGlobal(global, arg1);
            }
        }
        catch (WGException e) {
            Logger.getLogger("wga.tmlscript").error("Exception testing existence of TMLScript global " + arg0, e);
        }

        return super.get(arg0, arg1);

    }

    public static Object provideGlobal(TMLScriptGlobal global, Scriptable scope) {

        if (global.getType() == TMLScriptGlobal.TYPE_PACKAGE_OR_CLASS) {

            // Find top level scope
            while (scope.getParentScope() != null) {
                scope = scope.getParentScope();
            }

            // Go down packages from top level scope
            Iterator packages = WGUtils.deserializeCollection("Packages." + global.getRef(), ".").iterator();
            while (packages.hasNext()) {
                scope = (Scriptable) scope.get((String) packages.next(), scope);
                if (scope == null) {
                    throw new EvaluatorException("Unknown class or package in TMLScript global: " + global.getRef());
                }
            }

            return scope;

        }
        else if (global.getType() == TMLScriptGlobal.TYPE_OBJECT) {
            return global.getRef();
        }

        throw new EvaluatorException("Unknown TMLScript global type: " + global.getType());

    }

    protected boolean isItemName(String arg0, Scriptable scope) throws WGAPIException {

        // At this level we interpret all names as items that are not defined at
        // higher level
        // That way Items can be set using direct setter syntax: item = value
        if (_data.getRhinoScope().has(arg0, scope)) {
            return false;
        }

        if (_data.has(arg0, scope)) {
            return false;
        }

        return true;

    }

    public Scriptable getPrototype() {
        return _data;
    }

}
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