NIFI-4841 Fixing NPE when reverting local changes involving remote group ports. This...
[nifi.git] / nifi-nar-bundles / nifi-framework-bundle / nifi-framework / nifi-framework-core / src / main / java / org / apache / nifi / util / FlowDifferenceFilters.java
1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.nifi.util;
18
19 import org.apache.nifi.registry.flow.ComponentType;
20 import org.apache.nifi.registry.flow.VersionedComponent;
21 import org.apache.nifi.registry.flow.diff.DifferenceType;
22 import org.apache.nifi.registry.flow.diff.FlowDifference;
23 import org.apache.nifi.registry.flow.mapping.InstantiatedVersionedComponent;
24
25 import java.util.function.Predicate;
26
27 public class FlowDifferenceFilters {
28
29 /**
30 * Predicate that returns true if the difference is NOT a remote port being added, and false if it is.
31 */
32 public static Predicate<FlowDifference> FILTER_ADDED_REMOTE_PORTS = (fd) -> {
33 return !isAddedRemotePort(fd);
34 };
35
36 public static boolean isAddedRemotePort(final FlowDifference fd) {
37 if (fd.getDifferenceType() == DifferenceType.COMPONENT_ADDED) {
38 VersionedComponent component = fd.getComponentA();
39 if (component == null || fd.getComponentB() instanceof InstantiatedVersionedComponent) {
40 component = fd.getComponentB();
41 }
42
43 if (component.getComponentType() == ComponentType.REMOTE_INPUT_PORT
44 || component.getComponentType() == ComponentType.REMOTE_OUTPUT_PORT) {
45 return true;
46 }
47 }
48
49 return false;
50 }
51
52 }