/*

  * Copyright 2005-2008 The Kuali Foundation

  *

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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.kuali.rice.kew.util;

 import org.apache.commons.lang.StringUtils;

 import org.apache.commons.lang.text.StrLookup;

 import org.kuali.rice.core.config.ConfigContext;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 import org.kuali.rice.kns.util.KNSConstants;

 /**

  * Looks up Strings from the Config and System Parameters.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class ConfigStringLookup extends StrLookup {

         private String namespace;

         public ConfigStringLookup() {

         }

         public ConfigStringLookup(String namespace) {

                 this.namespace = namespace;

         }

         @Override

         public String lookup(String propertyName) {

                 if (StringUtils.isBlank(propertyName)) {

                         return null;

                 }

                 String paramValue = null;

                 // TODO temporarily disabling configuration parameter resolution against the racms because it's been causing some issues

                 if ( namespace != null ) {

                         paramValue = KNSServiceLocator.getRiceApplicationConfigurationMediationService().getConfigurationParameter(namespace, propertyName);

                 }

                 // check system parameters first

                 if ( paramValue == null ) {

                         paramValue = Utilities.getKNSParameterValue(KEWConstants.KEW_NAMESPACE, KNSConstants.DetailTypes.ALL_DETAIL_TYPE, propertyName);

                 }

                 if (paramValue == null) {

                         paramValue = ConfigContext.getCurrentContextConfig().getProperty(propertyName);

                 }

                 return paramValue;

         }

 }