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/*
* Copyright 2004,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.bsf.util;
import java.util.Hashtable;
/**
* An <code>ScriptSymbolTable</code> object is used by a <code>CodeBuffer</code>
* object to implement nested scopes.
*
* @author Matthew J. Duftler
*/
class ScriptSymbolTable extends Hashtable
{
private Hashtable parentTable;
ScriptSymbolTable(Hashtable parentTable)
{
this.parentTable = parentTable;
}
public synchronized Object get(Object key)
{
Object ret = super.get(key);
if (ret == null && parentTable != null)
ret = parentTable.get(key);
return ret;
}
}
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