001    // Copyright 2010 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    package org.apache.tapestry5.internal.spring;
015    
016    import java.util.Properties;
017    
018    import org.apache.tapestry5.ioc.services.SymbolSource;
019    import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
020    
021    public class SymbolBeanFactoryPostProcessor extends PropertyPlaceholderConfigurer
022    {
023        
024        private SymbolSource symbolSource;
025    
026        public SymbolBeanFactoryPostProcessor(SymbolSource symbolSource)
027        {
028            super();
029            this.symbolSource = symbolSource;
030            setIgnoreUnresolvablePlaceholders(true);
031        }
032    
033        @Override
034        protected String resolvePlaceholder(String placeholder, Properties props)
035        {
036            try
037            {
038                return symbolSource.valueForSymbol(placeholder);
039            }
040            catch(RuntimeException e)
041            {
042                 return super.resolvePlaceholder(placeholder, props);
043            }
044        }
045    
046    }