001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.hivemind.service.impl;
016    
017    import java.util.HashMap;
018    import java.util.List;
019    import java.util.Map;
020    
021    import org.apache.hivemind.SymbolSource;
022    import org.apache.hivemind.impl.BaseLocatable;
023    
024    /**
025     * Implementation of {@link org.apache.hivemind.SymbolSource} driven off of an extension point.
026     * 
027     * @author Howard Lewis Ship
028     */
029    public class DefaultsSymbolSource extends BaseLocatable implements SymbolSource
030    {
031        private List _defaults;
032    
033        private Map _symbols = new HashMap();
034    
035        public String valueForSymbol(String name)
036        {
037            return (String) _symbols.get(name);
038        }
039    
040        public void initializeService()
041        {
042            int count = _defaults.size();
043            for (int i = 0; i < count; i++)
044            {
045                FactoryDefault fd = (FactoryDefault) _defaults.get(i);
046    
047                String symbol = fd.getSymbol();
048                String value = fd.getValue();
049    
050                _symbols.put(symbol, value);
051            }
052        }
053    
054        public void setDefaults(List list)
055        {
056            _defaults = list;
057        }
058    }