content: /*
   *  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.
   *
   *  See the NOTICE file distributed with this work for additional
   *  information regarding copyright ownership.
   */
  
  package org.seaborne.delta.server.local.patchstores.mem;
  
  import java.util.LinkedHashMap;
  import java.util.Map;
  import java.util.stream.Stream;
  
  import org.seaborne.delta.Id;
  import org.seaborne.delta.server.local.patchstores.PatchStorage;
  import org.apache.jena.rdfpatch.RDFPatch;
  
  /**
   * Patch store in-memory, nothing persisted.
   */
  public class PatchStorageMem implements PatchStorage {
  
      private Map<Id, RDFPatch> store = new LinkedHashMap<>();
  
      public PatchStorageMem() {}
  
      @Override
      public Stream<Id> find() {
          return store.keySet().stream();
      }
  
      @Override
      public void store(Id key, RDFPatch value) {
          store.put(key, value);
      }
  
      @Override
      public RDFPatch fetch(Id key) {
          return store.get(key);
      }
  
      @Override
      public void delete(Id id) {
          store.remove(id);
      }
  
      @Override
      public void release() {
          store.clear();
      }
  }
  