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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This file is part of the Java Expressions Library (JEL).
* For more information about JEL visit : http://fti.dn.ua/JEL/
*
* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2006, 2007, 2009 Konstantin L. Metlov
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
// This class is both used to resolve the dynamic variable names and
// to provide their values. These two functions can also be
// implemented by two different classes.
public class DVResolverProvider extends gnu.jel.DVMap {
private java.util.HashMap<String,Object> properties=
new java.util.HashMap<String,Object>();
// adds a new property
protected void addProperty(String name,Object value) {
properties.put(name,value);
};
// implements the method of DVResolver interface,
// used by the compiler to query about available dynamic
// variables
public String getTypeName(String name) {
Object val=properties.get(name);
if (val==null) return null; // dynamic variable does not exist
if (val instanceof Data) return "Data";
if (val instanceof String) return "String";
// the type is not supported we say the variable is not defined
return null;
};
// Next we have those YYY getXXXProperty(String) methods described in
// the manual
public Data getDataProperty(String name) {
return (Data)properties.get(name);
};
public String getStringProperty(String name) {
return (String)properties.get(name);
};
};
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