blob: b80054ac3b2b14a968b875b7b98e3d116ab7b3d7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Pantheon.tech
* Copyright (C) 2022 Nordix Foundation
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.cps.spi;
import lombok.RequiredArgsConstructor;
@RequiredArgsConstructor
public class FetchDescendantsOption {
public static final FetchDescendantsOption FETCH_DIRECT_CHILDREN_ONLY = new FetchDescendantsOption(1);
public static final FetchDescendantsOption OMIT_DESCENDANTS = new FetchDescendantsOption(0);
public static final FetchDescendantsOption INCLUDE_ALL_DESCENDANTS = new FetchDescendantsOption(-1);
private final int depth;
/**
* Has next depth.
*
* @return true if next level of depth is available
* @throws IllegalArgumentException when depth less than -1
*/
public boolean hasNext() {
validateDepth(depth);
return depth > 0 || this.depth == INCLUDE_ALL_DESCENDANTS.depth;
}
/**
* Next fetch descendants option.
*
* @return the next fetch descendants option
* @throws IllegalArgumentException when depth less than -1 or 0
*/
public FetchDescendantsOption next() {
if (depth == 0) {
throw new IllegalArgumentException("Do not use next() method with zero depth");
}
final FetchDescendantsOption nextDescendantsOption = this.depth == INCLUDE_ALL_DESCENDANTS.depth
? INCLUDE_ALL_DESCENDANTS : new FetchDescendantsOption(depth - 1);
validateDepth(nextDescendantsOption.depth);
return nextDescendantsOption;
}
private static void validateDepth(final int depth) {
if (depth < -1) {
throw new IllegalArgumentException("A depth of less than minus one is not allowed");
}
}
}
|
