<commit_before>/*
 * 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 the following location:
 *
 *   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.cas.authentication;

import java.util.ArrayList;
import java.util.List;
import javax.validation.constraints.NotNull;

import com.github.inspektr.audit.annotation.Audit;
import org.jasig.cas.authentication.handler.AuthenticationException;
import org.jasig.cas.authentication.handler.AuthenticationHandler;
import org.jasig.cas.authentication.handler.NamedAuthenticationHandler;
import org.jasig.cas.authentication.principal.Credentials;
import org.jasig.cas.authentication.principal.Principal;
import org.perf4j.aop.Profiled;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author <NAME>
 * @version $Revision$ $Date$
 * @since 3.3.5
 */
public abstract class AbstractAuthenticationManager implements AuthenticationManager {

    /** Describes a credential that is not resolved to a principal. */
    protected static Pair<AuthenticationHandler, Principal> VOID_PRINCIPAL =
            new Pair<AuthenticationHandler, Principal>(null, null);

    /** Log instance for logging events, errors, warnings, etc. */
    protected final Logger log = LoggerFactory.getLogger(AuthenticationManagerImpl.class);
<commit_msg>Remove unused variable.<commit_after>/*
 * 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 the following location:
 *
 *   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.cas.authentication;

import java.util.ArrayList;
import java.util.List;
import javax.validation.constraints.NotNull;

import com.github.inspektr.audit.annotation.Audit;
import org.jasig.cas.authentication.handler.AuthenticationException;
import org.jasig.cas.authentication.handler.AuthenticationHandler;
import org.jasig.cas.authentication.handler.NamedAuthenticationHandler;
import org.jasig.cas.authentication.principal.Credentials;
import org.jasig.cas.authentication.principal.Principal;
import org.perf4j.aop.Profiled;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author <NAME>
 * @version $Revision$ $Date$
 * @since 3.3.5
 */
public abstract class AbstractAuthenticationManager implements AuthenticationManager {

    /** Log instance for logging events, errors, warnings, etc. */
    protected final Logger log = LoggerFactory.getLogger(AuthenticationManagerImpl.class);

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