content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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.activiti.spring;
  
  import jakarta.el.ELContext;
  import jakarta.el.ELResolver;
  import java.beans.FeatureDescriptor;
  import java.util.Iterator;
  import org.activiti.engine.ActivitiException;
  import org.springframework.context.ApplicationContext;
  
  /**
  
  
   */
  public class ApplicationContextElResolver extends ELResolver {
  
      protected ApplicationContext applicationContext;
  
      public ApplicationContextElResolver(ApplicationContext applicationContext) {
          this.applicationContext = applicationContext;
      }
  
      public Object getValue(ELContext context, Object base, Object property) {
          if (base == null) {
              // according to javadoc, can only be a String
              String key = (String) property;
  
              if (applicationContext.containsBean(key)) {
                  context.setPropertyResolved(true);
                  return applicationContext.getBean(key);
              }
          }
  
          return null;
      }
  
      public boolean isReadOnly(ELContext context, Object base, Object property) {
          return true;
      }
  
      public void setValue(ELContext context, Object base, Object property, Object value) {
          if (base == null) {
              String key = (String) property;
              if (applicationContext.containsBean(key)) {
                  throw new ActivitiException(
                      "Cannot set value of '" +
                      property +
                      "', it resolves to a bean defined in the Spring application-context."
                  );
              }
          }
      }
  
      public Class<?> getCommonPropertyType(ELContext context, Object arg) {
          return Object.class;
      }
  
      public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object arg) {
          return null;
      }
  
      public Class<?> getType(ELContext context, Object arg1, Object arg2) {
          return Object.class;
      }
  }
  