001    /**
002     * Copyright 2005-2013 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.rice.kew.util;
017    
018    import org.apache.commons.lang.StringUtils;
019    import org.apache.commons.lang.text.StrLookup;
020    import org.kuali.rice.coreservice.api.CoreServiceApiServiceLocator;
021    import org.kuali.rice.core.api.config.property.ConfigContext;
022    import org.kuali.rice.coreservice.api.parameter.ParameterKey;
023    import org.kuali.rice.coreservice.framework.CoreFrameworkServiceLocator;
024    import org.kuali.rice.kew.api.KewApiConstants;
025    import org.kuali.rice.krad.util.KRADConstants;
026    
027    /**
028     * Looks up Strings from the Config and System Parameters.
029     *
030     * @author Kuali Rice Team (rice.collab@kuali.org)
031     */
032    public class ConfigStringLookup extends StrLookup {
033            
034            private final String applicationId;
035            
036            public ConfigStringLookup() {
037            this(null);
038            }
039            
040            public ConfigStringLookup(String applicationId) {
041                    this.applicationId = applicationId;
042            }
043    
044        @Override
045        public String lookup(String propertyName) {
046            if (StringUtils.isBlank(propertyName)) {
047                return null;
048            }
049    
050            String paramValue = null;
051            // check system parameters first
052            if (StringUtils.isBlank(applicationId)) {
053                paramValue = CoreFrameworkServiceLocator.getParameterService().getParameterValueAsString(
054                        KewApiConstants.KEW_NAMESPACE, KRADConstants.DetailTypes.ALL_DETAIL_TYPE, propertyName);
055            } else {
056                ParameterKey parameterKey = ParameterKey.create(applicationId, KewApiConstants.KEW_NAMESPACE,
057                        KRADConstants.DetailTypes.ALL_DETAIL_TYPE, propertyName);
058                paramValue = CoreServiceApiServiceLocator.getParameterRepositoryService().getParameterValueAsString(parameterKey);
059            }
060    
061            if (paramValue == null) {
062                paramValue = ConfigContext.getCurrentContextConfig().getProperty(propertyName);
063            }
064            return paramValue;
065        }
066    
067    }