UndefinedValuesUtils.java
/*
* Copyright 2022 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* 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.
*/
package org.keycloak.models.map.common;
import java.util.Collection;
import java.util.Map;
/**
* This Util class defines conditions when objects can be considered undefined
* <br/>
* <br/>
* For example:
* <ul>
* <li>{@link String} is undefined if it is {@code null} or {@code empty}</li>
* <li>{@link Collection} is undefined if it is {@code null}, {@code empty} or all items are undefined</li>
* <li>{@link Map} is undefined if it is {@code null}, {@code empty}, or all values are undefined</li>
* </ul>
*/
public class UndefinedValuesUtils {
/**
* Decides whether the {@link Object o} is defined or not
*
* @param o object to check
* @return true when the {@link Object o} is undefined, false otherwise
*/
public static boolean isUndefined(Object o) {
if (o == null) {
return true;
} else if (o instanceof Collection) {
return isUndefinedCollection((Collection<?>) o);
} else if (o instanceof Map) {
return isUndefinedMap((Map<?, ?>) o);
} else if (o instanceof String) {
return isUndefinedString((String) o);
} else {
return false;
}
}
private static boolean isUndefinedCollection(Collection<?> collection) {
return collection.isEmpty() || collection.stream().allMatch(UndefinedValuesUtils::isUndefined);
}
private static boolean isUndefinedMap(Map<?, ?> map) {
return map.isEmpty() || map.values().stream().allMatch(UndefinedValuesUtils::isUndefined);
}
private static boolean isUndefinedString(String str) {
return str.trim().isEmpty();
}
}