/*
    * Copyright 2001-2005 The Apache Software Foundation.
    *
    * 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.apache.logging.log4j.catalog.api.dao;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.logging.log4j.catalog.api.Attribute;
  import org.apache.logging.log4j.catalog.api.CatalogData;
  import org.apache.logging.log4j.catalog.api.CatalogReader;
  import org.apache.logging.log4j.catalog.api.Category;
  import org.apache.logging.log4j.catalog.api.Event;
  import org.apache.logging.log4j.catalog.api.Product;
  
  public abstract class AbstractCatalogReader implements CatalogReader {
      protected CatalogData catalogData = null;
  
      protected final Map<String, Attribute> attributes = new HashMap<>();
  
      @Override
      public Map<String, Attribute> getAttributes() {
          return attributes;
      }
  
      @Override
      public Attribute getAttribute(String name) {
          return attributes.get(name);
      }
  
      @Override
      public Category getCategory(String name) {
          if (catalogData.getCategories() != null) {
              return catalogData.getCategories().stream().filter(c -> c.getName().equals(name)).findFirst().orElse(null);
          }
          return null;
      }
  
  
      @Override
      public Event getEvent(String name) {
          if (catalogData.getEvents() != null) {
              return catalogData.getEvents().stream().filter(e -> e.getName().equals(name)).findFirst().orElse(null);
          }
          return null;
      }
  
  
      @Override
      public Product getProduct(String name) {
          if (catalogData.getProducts() != null) {
              return catalogData.getProducts().stream().filter(p -> p.getName().equals(name)).findFirst().orElse(null);
          }
          return null;
      }
  
      public String readCatalog() {
          return null;
      }
  
      @Override
      public CatalogData read() {
          return catalogData;
      }
  }