spring security RoleHierarchyUtils 源码
spring security RoleHierarchyUtils 代码
文件路径：/core/src/main/java/org/springframework/security/access/hierarchicalroles/RoleHierarchyUtils.java
/*
* Copyright 2012-2016 the original author or authors.
*
* 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
*
* https://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.springframework.security.access.hierarchicalroles;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.List;
import java.util.Map;
import org.springframework.util.Assert;
/**
* Utility methods for {@link RoleHierarchy}.
*
* @author Thomas Darimont
* @since 4.2.0
*/
public final class RoleHierarchyUtils {
private RoleHierarchyUtils() {
}
/**
* Converts the supplied {@link Map} of role name to implied role name(s) to a string
* representation understood by {@link RoleHierarchyImpl#setHierarchy(String)}. The
* map key is the role name and the map value is a {@link List} of implied role
* name(s).
* @param roleHierarchyMap the mapping(s) of role name to implied role name(s)
* @return a string representation of a role hierarchy
* @throws IllegalArgumentException if roleHierarchyMap is null or empty or if a role
* name is null or empty or if an implied role name(s) is null or empty
*/
public static String roleHierarchyFromMap(Map<String, List<String>> roleHierarchyMap) {
Assert.notEmpty(roleHierarchyMap, "roleHierarchyMap cannot be empty");
StringWriter result = new StringWriter();
PrintWriter writer = new PrintWriter(result);
roleHierarchyMap.forEach((role, impliedRoles) -> {
Assert.hasLength(role, "role name must be supplied");
Assert.notEmpty(impliedRoles, "implied role name(s) cannot be empty");
for (String impliedRole : impliedRoles) {
writer.println(role + " > " + impliedRole);
}
});
return result.toString();
}
}
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