package org.jasig.portal.security;

import org.apache.commons.lang3.Validate;
import org.jasig.portal.EntityIdentifier;
import org.jasig.portal.services.AuthorizationService;

/**
 * Static convenience methods for working with IAuthorizationPricipal.
 *
 * Currently offers one method which encapsulates the magic for
 * converting a uPortal IPerson to an IAuthorizationPrincipal.
 *
 * @since uPortal 4.1
 */
public final class AuthorizationPrincipalHelper {

    /**
     * Convenience method for converting an IPerson to an IAuthorizationPrincipal.
     * @param user a non-null valid IPerson
     * @return an IAuthorizationPrincipal representing that user
     * @throws IllegalArgumentException if the user object is null or defective.
     * @since uPortal 4.1
     */
    public static IAuthorizationPrincipal principalFromUser(final IPerson user) {

        Validate.notNull(user, "Cannot determine an authorization principal for null user.");

        final EntityIdentifier userEntityIdentifier = user.getEntityIdentifier();
        Validate.notNull(user, "The user object is defective: lacks entity identifier.");

        final String userEntityKey = userEntityIdentifier.getKey();
        Validate.notNull(userEntityKey, "The user object is defective: lacks entity key.");
        final Class userEntityType = userEntityIdentifier.getType();
        Validate.notNull(userEntityType, "The user object is defective: lacks entity type.");

        final IAuthorizationPrincipal principal =
                AuthorizationService.instance().newPrincipal(userEntityKey, userEntityType);

        return principal;

    }

}

/**
 * Licensed to Jasig under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Jasig licenses this file to you 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.jasig.portal.security;

import org.apache.commons.lang3.Validate;
import org.jasig.portal.EntityIdentifier;
import org.jasig.portal.services.AuthorizationService;

/**
 * Static convenience methods for working with IAuthorizationPricipal.
 *
 * Currently offers one method which encapsulates the magic for
 * converting a uPortal IPerson to an IAuthorizationPrincipal.
 *
 * @since uPortal 4.1
 */
public final class AuthorizationPrincipalHelper {

    /**
     * Convenience method for converting an IPerson to an IAuthorizationPrincipal.
     * @param user a non-null valid IPerson
     * @return an IAuthorizationPrincipal representing that user
     * @throws IllegalArgumentException if the user object is null or defective.
     * @since uPortal 4.1
     */
    public static IAuthorizationPrincipal principalFromUser(final IPerson user) {

        Validate.notNull(user, "Cannot determine an authorization principal for null user.");

        final EntityIdentifier userEntityIdentifier = user.getEntityIdentifier();
        Validate.notNull(user, "The user object is defective: lacks entity identifier.");

        final String userEntityKey = userEntityIdentifier.getKey();
        Validate.notNull(userEntityKey, "The user object is defective: lacks entity key.");
        final Class userEntityType = userEntityIdentifier.getType();
        Validate.notNull(userEntityType, "The user object is defective: lacks entity type.");

        final IAuthorizationPrincipal principal =
                AuthorizationService.instance().newPrincipal(userEntityKey, userEntityType);

        return principal;

    }

}

Add Jasig license header to AuthorizationPrincipalHelper.java