| /* |
| * 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 |
| * |
| * 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.nifi.kubernetes.state.provider; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Optional; |
| import org.apache.nifi.components.state.StateMap; |
| |
| /** |
| * Standard implementation of StateMap |
| */ |
| class StandardStateMap implements StateMap { |
| private static final int EMPTY_VERSION = -1; |
| |
| private final Map<String, String> data; |
| |
| private final Optional<String> version; |
| |
| StandardStateMap(final Map<String, String> data, final Optional<String> version) { |
| this.data = Collections.unmodifiableMap(data); |
| this.version = version; |
| } |
| |
| |
| /** |
| * Get State Version |
| * |
| * @return State Version or empty when not known |
| */ |
| @Override |
| public Optional<String> getStateVersion() { |
| return version; |
| } |
| |
| /** |
| * Get Value from State Map |
| * |
| * @param key the key whose value should be retrieved |
| * @return Value or null when not found |
| */ |
| @Override |
| public String get(final String key) { |
| return data.get(key); |
| } |
| |
| /** |
| * Get State Map |
| * |
| * @return State Map |
| */ |
| @Override |
| public Map<String, String> toMap() { |
| return data; |
| } |
| } |