content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.repository.patches;
  
  import org.apache.atlas.exception.AtlasBaseException;
  import org.apache.atlas.model.patches.AtlasPatch.PatchStatus;
  
  import static org.apache.atlas.model.patches.AtlasPatch.PatchStatus.UNKNOWN;
  
  public abstract class AtlasPatchHandler {
      public static final String JAVA_PATCH_TYPE = "JAVA_PATCH";
  
      private final String             patchId;
      private final String             patchDescription;
      private final AtlasPatchRegistry patchRegistry;
      private       PatchStatus        status;
  
      public AtlasPatchHandler(AtlasPatchRegistry patchRegistry, String patchId, String patchDescription) {
          this.patchId          = patchId;
          this.patchDescription = patchDescription;
          this.patchRegistry    = patchRegistry;
          this.status           = getStatusFromRegistry();
  
          register();
      }
  
      public PatchStatus getStatusFromRegistry() {
          return patchRegistry.getStatus(patchId);
      }
  
      public PatchStatus getStatus() {
          return status;
      }
  
      public void setStatus(PatchStatus status) {
          this.status = status;
  
          patchRegistry.updateStatus(patchId, status);
      }
  
      public String getPatchId() {
          return patchId;
      }
  
      public abstract void apply() throws AtlasBaseException;
  
      private void register() {
          PatchStatus patchStatus = getStatus();
  
          if (patchStatus == null || patchStatus == UNKNOWN) {
              patchRegistry.register(patchId, patchDescription, JAVA_PATCH_TYPE, "apply", UNKNOWN);
          }
      }
  }
  