/**
* Copyright 2004-2016 Riccardo Solmi. All rights reserved.
* This file is part of the Whole Platform.
*
* The Whole Platform 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 3 of the License, or
* (at your option) any later version.
*
* The Whole Platform 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 the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
*/
package scheme.old;
import java.util.HashMap;
class SchemeEnvironmentImpl2 implements SchemeEnvironment {
private class Box {
public Box(SchemeValue v) {
value = v;
}
public SchemeValue getValue() {
return value;
}
public void setValue(SchemeValue v) {
value = v;
}
private SchemeValue value;
}
public SchemeEnvironmentImpl2() {
map = new HashMap();
}
public SchemeEnvironmentImpl2(HashMap m) {
map = (HashMap) m.clone();
}
public SchemeEnvironment copy() {
return new SchemeEnvironmentImpl2(map);
}
public void add(String name, SchemeValue value) {
map.put(name, new Box(value));
}
public SchemeValue get(String name) throws SchemeException {
if (map.containsKey(name))
return ((Box) map.get(name)).getValue();
else
throw new SchemeException("unbound name: " + name);
}
public void set(String name, SchemeValue value) {
((Box) map.get(name)).setValue(value);
}
private HashMap map;
}