legacypasswordhandleradaptorauthenticationhandler.java

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/*
 * Copyright 2007 The JA-SIG Collaborative. All rights reserved. See license
 * distributed with this file and available online at
 * http://www.ja-sig.org/products/cas/overview/license/
 */
package org.jasig.cas.adaptors.cas;

import org.jasig.cas.authentication.handler.AuthenticationHandler;
import org.jasig.cas.authentication.principal.Credentials;
import org.jasig.cas.util.annotation.NotNull;

import edu.yale.its.tp.cas.auth.PasswordHandler;

/**
 * An AuthenticationHandler that obtains the hidden HttpServletRequest bound to
 * the Credentials to present to a Legacy CAS 2 Password Handler. Then map the
 * response back to the new interface.
 * <p>
 * Requires a CAS 2 PasswordHandler object wired to the PasswordHandler property
 * </p>
 * <p>
 * Only responds to LegacyCasCredentials
 * </p>
 * 
 * @author Scott Battaglia
 * @version $Revision: 42053 $ $Date: 2007-06-10 09:17:55 -0400 (Sun, 10 Jun 2007) $
 * @since 3.0
 */
public final class LegacyPasswordHandlerAdaptorAuthenticationHandler implements
    AuthenticationHandler {

    @NotNull
    private PasswordHandler passwordHandler;

    public boolean authenticate(final Credentials credentials) {

        final LegacyCasCredentials casCredentials = (LegacyCasCredentials) credentials;

        return this.passwordHandler.authenticate(casCredentials
            .getServletRequest(), casCredentials.getUsername(), casCredentials
            .getPassword());
    }

    public boolean supports(final Credentials credentials) {
        return credentials != null
            && LegacyCasCredentials.class.equals(credentials.getClass());
    }

    /**
     * @param passwordHandler CAS 2 PasswordHandler object to be adapted to the
     * new AuthenticationHandler interface.
     */
    public void setPasswordHandler(final PasswordHandler passwordHandler) {
        this.passwordHandler = passwordHandler;
    }
}