DS_RootScope.java

/* --------------------------------------------------------- *
 *    __________    D E L T A S C R I P T                    *
 *   (_________()                                            *
 *    /  ===   /   - A fast, dynamic scripting language      *
 *   |  ==    |    - Version 4.13.11.0                       *
 *   /  ===   /    - Developed by Adam R. Nelson             *
 *  |  =  =  |     - 2011-2013                               *
 *  /  ===   /     - Distributed under GNU LGPL v3           *
 * (________()     - http://github.com/ar-nelson/deltascript *
 *                                                           *
 * --------------------------------------------------------- */

package com.sector91.delta.script.objects;

import com.sector91.delta.script.DScriptContext;
import com.sector91.delta.script.DScriptErr;

public final class DS_RootScope extends DS_HashedScope
{
    private DScriptContext context;
    
    @Override public void setLocal(DS_Tag tag, DS_Object value)
            throws DScriptErr
    {
        throw new DScriptErr("Cannot overwrite the global binding '" +
            tag.str + "' in the root scope.");
    }
    
    @Override public boolean isRootScope()
    {return true;}
    
    @Override public DS_RootScope getRootScope()
    {return this;}
    
    public void addGlobalBinding(DS_Tag tag, DS_Object value)
            throws DScriptErr
    {super.setLocal(tag, value);}
    
    @Override public DScriptContext getContext()
    {return context;}
    
    public void setContext(DScriptContext context)
    {this.context = context;}
    
    @Override public DS_RootScope clone()
    {
        DS_RootScope newScope = new DS_RootScope();
        for (ScopeEntry n : getEntries())
            newScope.addEntryDirectly(n.cloneTo(this, newScope));
        return newScope;
    }
}