1 /*
2 * Portions of this software was developed by employees of the National Institute
3 * of Standards and Technology (NIST), an agency of the Federal Government and is
4 * being made available as a public service. Pursuant to title 17 United States
5 * Code Section 105, works of NIST employees are not subject to copyright
6 * protection in the United States. This software may be subject to foreign
7 * copyright. Permission in the United States and in foreign countries, to the
8 * extent that NIST may hold copyright, to use, copy, modify, create derivative
9 * works, and distribute this software and its documentation without fee is hereby
10 * granted on a non-exclusive basis, provided that this notice and disclaimer
11 * of warranty appears in all copies.
12 *
13 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
14 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
15 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
17 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
18 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT
19 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
20 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
21 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
22 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
23 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
24 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
25 */
26
27 package gov.nist.secauto.metaschema.schemagen;
28
29 import gov.nist.secauto.metaschema.core.model.IFlagInstance;
30 import gov.nist.secauto.metaschema.core.util.ObjectUtils;
31
32 import java.util.Collection;
33 import java.util.function.Predicate;
34 import java.util.stream.Collectors;
35
36 import edu.umd.cs.findbugs.annotations.NonNull;
37
38 public final class FlagInstanceFilter {
39 private FlagInstanceFilter() {
40 // disable construction
41 }
42
43 @NonNull
44 public static Collection<? extends IFlagInstance> filterFlags(
45 @NonNull Collection<? extends IFlagInstance> flags,
46 IFlagInstance jsonKeyFlag) {
47 Predicate<IFlagInstance> filter = null;
48
49 // determine if we need to filter a JSON key
50 if (jsonKeyFlag != null) {
51 filter = filterFlag(jsonKeyFlag);
52 }
53 return applyFilter(flags, filter);
54 }
55
56 @NonNull
57 public static Collection<? extends IFlagInstance> filterFlags(
58 @NonNull Collection<? extends IFlagInstance> flags,
59 IFlagInstance jsonKeyFlag,
60 IFlagInstance jsonValueKeyFlag) {
61 Predicate<IFlagInstance> filter = null;
62
63 // determine if we need to filter a JSON key
64 if (jsonKeyFlag != null) {
65 filter = filterFlag(jsonKeyFlag);
66 }
67
68 // determine if we need to filter a JSON value key
69 if (jsonValueKeyFlag != null) {
70 Predicate<IFlagInstance> jsonValueKeyFilter
71 = filterFlag(jsonValueKeyFlag);
72 if (filter == null) {
73 filter = jsonValueKeyFilter;
74 } else {
75 filter = filter.and(jsonValueKeyFilter);
76 }
77 }
78
79 return applyFilter(flags, filter);
80 }
81
82 @NonNull
83 private static Predicate<IFlagInstance>
84 filterFlag(@NonNull IFlagInstance flagToFilter) {
85 return flag -> flag != flagToFilter;
86 }
87
88 @NonNull
89 private static Collection<? extends IFlagInstance> applyFilter(
90 @NonNull Collection<? extends IFlagInstance> flags,
91 Predicate<IFlagInstance> filter) {
92 Collection<? extends IFlagInstance> retval;
93 if (filter == null) {
94 retval = flags;
95 } else {
96 retval = ObjectUtils.notNull(flags.stream()
97 .filter(filter)
98 .collect(Collectors.toList()));
99 }
100 return retval;
101 }
102 }