-/*
+/*-
* ============LICENSE_START=======================================================
- * Copyright (C) 2019 Nordix Foundation.
- * Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2019-2021, 2023 Nordix Foundation.
+ * Modifications Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
package org.onap.policy.models.base;
-import java.util.ArrayList;
+import jakarta.ws.rs.core.Response;
+import java.lang.reflect.InvocationTargetException;
+import java.util.Collection;
+import java.util.LinkedHashMap;
import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
import java.util.function.Function;
import java.util.stream.Collectors;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.collections4.MapUtils;
/**
* Utility class for Policy Framework concept utilities.
*
* @author Liam Fallon (liam.fallon@est.tech)
*/
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class PfUtils {
- private PfUtils() {
- // Cannot be subclassed
- }
/**
* Compare two objects using their equals methods, nulls are allowed.
*
- * @param leftObject the first object
+ * @param leftObject the first object
* @param rightObject the second object
* @return a measure of the comparison
*/
}
/**
- * Convenience method to apply a mapping function to all of the elements of a list,
- * generating a new list.
+ * Compare two collections of the same type, nulls are allowed.
*
- * @param source list whose elements are to be mapped, or {@code null}
- * @param mapFunc mapping function
- * @return a new list, containing mappings of all of the items in the original list
+ * @param leftCollection the first collection
+ * @param rightCollection the second collection
+ * @return a measure of the comparison
+ */
+ public static <T> int compareCollections(final Collection<T> leftCollection, final Collection<T> rightCollection) {
+ if (CollectionUtils.isEmpty(leftCollection) && CollectionUtils.isEmpty(rightCollection)) {
+ return 0;
+ }
+
+ return compareObjects(leftCollection, rightCollection);
+ }
+
+
+ /**
+ * Compare two maps of the same type, nulls are allowed.
+ *
+ * @param leftMap the first map
+ * @param rightMap the second map
+ * @return a measure of the comparison
*/
- public static <T> List<T> mapList(List<T> source, Function<T, T> mapFunc) {
+ public static <K, V> int compareMaps(final Map<K, V> leftMap, final Map<K, V> rightMap) {
+ if (MapUtils.isEmpty(leftMap) && MapUtils.isEmpty(rightMap)) {
+ return 0;
+ }
+
+ return compareObjects(leftMap, rightMap);
+ }
+
+ /**
+ * Convenience method to apply a mapping function to all the elements of a list, generating a new list.
+ *
+ * @param source list whose elements are to be mapped, or {@code null}
+ * @param mapFunc mapping function
+ * @param defaultValue value to be returned if source is {@code null}
+ * @return a new list, containing mappings of all the items in the original list
+ */
+ public static <T, R> List<R> mapList(List<T> source, Function<T, R> mapFunc, List<R> defaultValue) {
if (source == null) {
- return new ArrayList<>();
+ return defaultValue;
}
return source.stream().map(mapFunc).collect(Collectors.toList());
}
+
+ /**
+ * Convenience method to apply a mapping function to all the elements of a list, generating a new list.
+ *
+ * @param source list whose elements are to be mapped, or {@code null}
+ * @param mapFunc mapping function
+ * @return a new list, containing mappings of all the items in the original list, or {@code null} if the source
+ * is {@code null}
+ */
+ public static <T, R> List<R> mapList(List<T> source, Function<T, R> mapFunc) {
+ return mapList(source, mapFunc, null);
+ }
+
+ /**
+ * Convenience method to apply a mapping function to all the values of a map, generating a new map.
+ *
+ * @param source map whose values are to be mapped, or {@code null}
+ * @param mapFunc mapping function
+ * @param defaultValue value to be returned if source is {@code null}
+ * @return a new map, containing mappings of all the items in the original map
+ */
+ public static <K, T, R> Map<K, R> mapMap(Map<K, T> source, Function<T, R> mapFunc, Map<K, R> defaultValue) {
+ if (source == null) {
+ return defaultValue;
+ }
+
+ Map<K, R> map = new LinkedHashMap<>();
+ for (Entry<K, T> ent : source.entrySet()) {
+ map.put(ent.getKey(), mapFunc.apply(ent.getValue()));
+ }
+
+ return map;
+ }
+
+ /**
+ * Convenience method to apply a mapping function to all the values of a map, generating a new map.
+ *
+ * @param source map whose values are to be mapped, or {@code null}
+ * @param mapFunc mapping function
+ * @return a new map, containing mappings of all the items in the original map, or {@code null} if the source is
+ * {@code null}
+ */
+ public static <K, T, R> Map<K, R> mapMap(Map<K, T> source, Function<T, R> mapFunc) {
+ return mapMap(source, mapFunc, null);
+ }
+
+ /**
+ * Makes a copy of an object using the copy constructor from the object's class.
+ *
+ * @param source object to be copied
+ * @return a copy of the source, or {@code null} if the source is {@code null}
+ * @throws PfModelRuntimeException if the object cannot be copied
+ */
+ public static <T> T makeCopy(T source) {
+ if (source == null) {
+ return null;
+ }
+
+ try {
+ @SuppressWarnings("unchecked") Class<? extends T> clazz = (Class<? extends T>) source.getClass();
+
+ return clazz.getConstructor(clazz).newInstance(source);
+
+ } catch (InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException
+ | RuntimeException e) {
+ throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR,
+ "error copying concept key class: " + source.getClass().getName(), e);
+ }
+ }
}
Code Review / policy / models.git / blobdiff