edu.internet2.middleware.subject.provider.LdapComparator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of grouper Show documentation

Internet2 Groups Management Toolkit

There is a newer version: 5.13.5

/**
 * Copyright 2014 Internet2
 *
 * 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.
 */
/* ========================================================================
 * Copyright (c) 2009-2011 The University of Washington
 *
 * 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.
 * ========================================================================
 */

/*
 * Simple subject comparator
 * @author fox
 */

package edu.internet2.middleware.subject.provider;

import java.util.Comparator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import edu.internet2.middleware.subject.Subject;
import edu.internet2.middleware.subject.SubjectUtils;

public class LdapComparator implements Comparator {

	private static Log log = edu.internet2.middleware.grouper.util.GrouperUtil.getLog(LdapComparator.class);

	public LdapComparator() {
		super();
	}

	/**
	 * Compares two subjects.
	 * 
	 * @param so0
	 *            first subject
	 * @param so1
	 *            second subject
	 */
	public int compare(Subject so0, Subject so1) {
    if (so0 == so1) {
      return 0;
    }

    if (so0 == null) {
      return -1;
    }
    
    if (so1 == null) {
      return 1;
    }
    
    int compare = SubjectUtils.compare(so0.getSourceId(), so1.getSourceId());
    if (compare != 0) {
      return compare;
    }
    
    return SubjectUtils.compare(so0.getId(), so1.getId());
	}
}