FlagInstanceFilter.java
/*
* Portions of this software was developed by employees of the National Institute
* of Standards and Technology (NIST), an agency of the Federal Government and is
* being made available as a public service. Pursuant to title 17 United States
* Code Section 105, works of NIST employees are not subject to copyright
* protection in the United States. This software may be subject to foreign
* copyright. Permission in the United States and in foreign countries, to the
* extent that NIST may hold copyright, to use, copy, modify, create derivative
* works, and distribute this software and its documentation without fee is hereby
* granted on a non-exclusive basis, provided that this notice and disclaimer
* of warranty appears in all copies.
*
* THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
* EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
* THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
* INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
* SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT
* SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
* INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
* OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
* CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
* PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
* OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
*/
package gov.nist.secauto.metaschema.schemagen;
import gov.nist.secauto.metaschema.core.model.IFlagInstance;
import gov.nist.secauto.metaschema.core.util.ObjectUtils;
import java.util.Collection;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import edu.umd.cs.findbugs.annotations.NonNull;
public final class FlagInstanceFilter {
private FlagInstanceFilter() {
// disable construction
}
@NonNull
public static Collection<? extends IFlagInstance> filterFlags(
@NonNull Collection<? extends IFlagInstance> flags,
IFlagInstance jsonKeyFlag) {
Predicate<IFlagInstance> filter = null;
// determine if we need to filter a JSON key
if (jsonKeyFlag != null) {
filter = filterFlag(jsonKeyFlag);
}
return applyFilter(flags, filter);
}
@NonNull
public static Collection<? extends IFlagInstance> filterFlags(
@NonNull Collection<? extends IFlagInstance> flags,
IFlagInstance jsonKeyFlag,
IFlagInstance jsonValueKeyFlag) {
Predicate<IFlagInstance> filter = null;
// determine if we need to filter a JSON key
if (jsonKeyFlag != null) {
filter = filterFlag(jsonKeyFlag);
}
// determine if we need to filter a JSON value key
if (jsonValueKeyFlag != null) {
Predicate<IFlagInstance> jsonValueKeyFilter
= filterFlag(jsonValueKeyFlag);
if (filter == null) {
filter = jsonValueKeyFilter;
} else {
filter = filter.and(jsonValueKeyFilter);
}
}
return applyFilter(flags, filter);
}
@NonNull
private static Predicate<IFlagInstance>
filterFlag(@NonNull IFlagInstance flagToFilter) {
return flag -> flag != flagToFilter;
}
@NonNull
private static Collection<? extends IFlagInstance> applyFilter(
@NonNull Collection<? extends IFlagInstance> flags,
Predicate<IFlagInstance> filter) {
Collection<? extends IFlagInstance> retval;
if (filter == null) {
retval = flags;
} else {
retval = ObjectUtils.notNull(flags.stream()
.filter(filter)
.collect(Collectors.toList()));
}
return retval;
}
}