2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.controlloop.actorserviceprovider.topic;
23 import java.util.Arrays;
24 import lombok.EqualsAndHashCode;
25 import org.onap.policy.common.utils.coder.StandardCoderObject;
28 * Selector key, which contains a hierarchical list of Strings and Integers that are used
29 * to extract the content of a field, typically from a {@link StandardCoderObject}.
32 public class SelectorKey {
35 * Names and indices used to extract the field's value.
37 private final Object[] fieldIdentifiers;
40 * Constructs the object.
42 * @param fieldIdentifiers names and indices used to extract the field's value
44 public SelectorKey(Object... fieldIdentifiers) {
45 this.fieldIdentifiers = fieldIdentifiers;
49 * Extracts the given field from an object.
51 * @param object object from which to extract the field
52 * @return the extracted value, or {@code null} if the object does not contain the
55 public String extractField(StandardCoderObject object) {
56 return object.getString(fieldIdentifiers);
60 public String toString() {
61 return Arrays.toString(fieldIdentifiers);