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Library to assist with using Micro Focus Haven OnDemand SSO with Spring Security

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/*
 * Copyright 2015 Hewlett-Packard Development Company, L.P.
 * Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License.
 */

package com.hp.autonomy.hod.sso;

import com.hp.autonomy.hod.client.api.authentication.EntityType;
import com.hp.autonomy.hod.client.api.authentication.TokenType;
import com.hp.autonomy.hod.client.token.TokenProxy;
import com.hp.autonomy.hod.client.token.TokenProxyService;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;

/**
 * {@link TokenProxyService} which retrieves the token proxy from the Spring Security Context if the stored
 * authentication is a {@link HodAuthentication}.
 */
public class SpringSecurityTokenProxyService implements TokenProxyService {
    @Override
    public TokenProxy getTokenProxy() {
        final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

        if (!(authentication instanceof HodAuthentication)) {
            return null;
        }

        // Usage of this class requires that the application is using HodAuthentications
        //noinspection unchecked
        return ((HodAuthentication) authentication).getTokenProxy();
    }
}