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.persistence.cache;
  
  import static java.util.Collections.emptyList;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import org.activiti.engine.impl.persistence.entity.Entity;
  
  /**
  
   */
  public class EntityCacheImpl implements EntityCache {
  
      protected Map<Class<?>, Map<String, CachedEntity>> cachedObjects = new HashMap<
          Class<?>,
          Map<String, CachedEntity>
      >();
  
      @Override
      public CachedEntity put(Entity entity, boolean storeState) {
          Map<String, CachedEntity> classCache = cachedObjects.get(entity.getClass());
          if (classCache == null) {
              classCache = new HashMap<String, CachedEntity>();
              cachedObjects.put(entity.getClass(), classCache);
          }
          CachedEntity cachedObject = new CachedEntity(entity, storeState);
          classCache.put(entity.getId(), cachedObject);
          return cachedObject;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <T> T findInCache(Class<T> entityClass, String id) {
          CachedEntity cachedObject = null;
          Map<String, CachedEntity> classCache = cachedObjects.get(entityClass);
  
          if (classCache == null) {
              classCache = findClassCacheByCheckingSubclasses(entityClass);
          }
  
          if (classCache != null) {
              cachedObject = classCache.get(id);
          }
  
          if (cachedObject != null) {
              return (T) cachedObject.getEntity();
          }
  
          return null;
      }
  
      protected Map<String, CachedEntity> findClassCacheByCheckingSubclasses(Class<?> entityClass) {
          for (Class<?> clazz : cachedObjects.keySet()) {
              if (entityClass.isAssignableFrom(clazz)) {
                  return cachedObjects.get(clazz);
              }
          }
          return null;
      }
  
      @Override
      public void cacheRemove(Class<?> entityClass, String entityId) {
          Map<String, CachedEntity> classCache = cachedObjects.get(entityClass);
          if (classCache == null) {
              return;
          }
          classCache.remove(entityId);
      }
  
      @Override
      public <T> Collection<CachedEntity> findInCacheAsCachedObjects(Class<T> entityClass) {
          Map<String, CachedEntity> classCache = cachedObjects.get(entityClass);
          if (classCache != null) {
              return classCache.values();
          }
          return null;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <T> List<T> findInCache(Class<T> entityClass) {
          Map<String, CachedEntity> classCache = cachedObjects.get(entityClass);
  
          if (classCache == null) {
              classCache = findClassCacheByCheckingSubclasses(entityClass);
          }
  
          if (classCache != null) {
              List<T> entities = new ArrayList<T>(classCache.size());
              for (CachedEntity cachedObject : classCache.values()) {
                  entities.add((T) cachedObject.getEntity());
              }
              return entities;
          }
  
          return emptyList();
      }
  
      public Map<Class<?>, Map<String, CachedEntity>> getAllCachedEntities() {
          return cachedObjects;
      }
  
      @Override
      public void close() {}
  
      @Override
      public void flush() {}
  }
  