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.el;
  
  import java.util.Map;
  import org.activiti.engine.ActivitiException;
  import org.activiti.engine.delegate.Expression;
  import org.activiti.engine.delegate.VariableScope;
  import org.activiti.engine.impl.interceptor.DelegateInterceptor;
  
  /**
   * Expression that always returns the same value when <code>getValue</code> is called. Setting of the value is not supported.
   *
  
   */
  public class FixedValue implements Expression {
  
      private static final long serialVersionUID = 1L;
      private Object value;
  
      public FixedValue(Object value) {
          this.value = value;
      }
  
      @Override
      public Object getValue(VariableScope variableScope) {
          return value;
      }
  
      @Override
      public void setValue(Object value, VariableScope variableScope) {
          throw new ActivitiException("Cannot change fixed value");
      }
  
      @Override
      public String getExpressionText() {
          return value.toString();
      }
  
      @Override
      public Object getValue(
          ExpressionManager expressionManager,
          DelegateInterceptor delegateInterceptor,
          Map<String, Object> availableVariables
      ) {
          return value;
      }
  }
  