content: /*
   * Copyright 2017-2025 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.cloud.common.messaging.config;
  
  import java.util.LinkedHashSet;
  import java.util.Set;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  import org.springframework.core.env.ConfigurableEnvironment;
  import org.springframework.core.env.PropertySource;
  import org.springframework.core.env.StandardEnvironment;
  import org.springframework.util.StringUtils;
  
  public class FunctionBindingPropertySource extends PropertySource {
  
      public static final String SPRING_CLOUD_FUNCTION_DEFINITION = "spring.cloud.function.definition";
  
      private Set<String> functions = new LinkedHashSet<>();
      private final String definition;
  
      public FunctionBindingPropertySource(ConfigurableEnvironment environment) {
          super(FunctionBindingPropertySource.class.getSimpleName());
          this.definition = environment.getProperty(SPRING_CLOUD_FUNCTION_DEFINITION, "");
  
          environment.getPropertySources().addAfter(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME, this);
      }
  
      public void register(String name) {
          functions.add(name);
      }
  
      @Override
      public Object getProperty(String name) {
          if (!SPRING_CLOUD_FUNCTION_DEFINITION.equals(name)) {
              return null;
          }
  
          return Stream
              .concat(
                  Stream.of(definition.split(";")).filter(StringUtils::hasText),
                  functions.stream().filter(StringUtils::hasText)
              )
              .distinct()
              .collect(Collectors.joining(";"));
      }
  }
  