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.engine.impl.bpmn.helper;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.util.List;
  import org.activiti.engine.ActivitiException;
  import org.activiti.engine.ActivitiIllegalArgumentException;
  import org.activiti.engine.impl.bpmn.parser.FieldDeclaration;
  import org.activiti.engine.impl.util.ReflectUtil;
  
  /**
  
   */
  public class ClassDelegateUtil {
  
      public static Object instantiateDelegate(Class<?> clazz, List<FieldDeclaration> fieldDeclarations) {
          return instantiateDelegate(clazz.getName(), fieldDeclarations);
      }
  
      public static Object instantiateDelegate(String className, List<FieldDeclaration> fieldDeclarations) {
          Object object = ReflectUtil.instantiate(className);
          applyFieldDeclaration(fieldDeclarations, object);
          return object;
      }
  
      public static void applyFieldDeclaration(List<FieldDeclaration> fieldDeclarations, Object target) {
          if (fieldDeclarations != null) {
              for (FieldDeclaration declaration : fieldDeclarations) {
                  applyFieldDeclaration(declaration, target);
              }
          }
      }
  
      public static void applyFieldDeclaration(FieldDeclaration declaration, Object target) {
          Method setterMethod = ReflectUtil.getSetter(
              declaration.getName(),
              target.getClass(),
              declaration.getValue().getClass()
          );
  
          if (setterMethod != null) {
              try {
                  setterMethod.invoke(target, declaration.getValue());
              } catch (IllegalArgumentException e) {
                  throw new ActivitiException(
                      "Error while invoking '" + declaration.getName() + "' on class " + target.getClass().getName(),
                      e
                  );
              } catch (IllegalAccessException e) {
                  throw new ActivitiException(
                      "Illegal access when calling '" +
                      declaration.getName() +
                      "' on class " +
                      target.getClass().getName(),
                      e
                  );
              } catch (InvocationTargetException e) {
                  throw new ActivitiException(
                      "Exception while invoking '" + declaration.getName() + "' on class " + target.getClass().getName(),
                      e
                  );
              }
          } else {
              Field field = ReflectUtil.getField(declaration.getName(), target);
              if (field == null) {
                  throw new ActivitiIllegalArgumentException(
                      "Field definition uses non-existing field '" +
                      declaration.getName() +
                      "' on class " +
                      target.getClass().getName()
                  );
              }
              // Check if the delegate field's type is correct
              if (!fieldTypeCompatible(declaration, field)) {
                  throw new ActivitiIllegalArgumentException(
                      "Incompatible type set on field declaration '" +
                      declaration.getName() +
                      "' for class " +
                      target.getClass().getName() +
                      ". Declared value has type " +
                      declaration.getValue().getClass().getName() +
                      ", while expecting " +
                      field.getType().getName()
                  );
              }
              ReflectUtil.setField(field, target, declaration.getValue());
          }
      }
  
      public static boolean fieldTypeCompatible(FieldDeclaration declaration, Field field) {
          if (declaration.getValue() != null) {
              return field.getType().isAssignableFrom(declaration.getValue().getClass());
          } else {
              // Null can be set any field type
              return true;
          }
      }
  }
  