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Spring Security 3 integration for WAFFLE

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/**
 * Waffle (https://github.com/dblock/waffle)
 *
 * Copyright (c) 2010 - 2015 Application Security, Inc.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Application Security, Inc.
 */
package waffle.spring;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;

import waffle.windows.auth.WindowsAccount;

/**
 * A {@link GrantedAuthorityFactory} that uses the {@link WindowsAccount}'s fqn as the basis of the
 * {@link GrantedAuthority} string, and (optionally) applies two transformations:
 * 
 * prepending a prefix, and
 * converting to uppercase
 * 
 * .
 */
public class FqnGrantedAuthorityFactory implements GrantedAuthorityFactory {

    /** The prefix. */
    private final String  prefix;

    /** The convert to upper case. */
    private final boolean convertToUpperCase;

    /**
     * Instantiates a new fqn granted authority factory.
     *
     * @param newPrefix
     *            the new prefix
     * @param newConvertToUpperCase
     *            the new convert to upper case
     */
    public FqnGrantedAuthorityFactory(final String newPrefix, final boolean newConvertToUpperCase) {
        this.prefix = newPrefix;
        this.convertToUpperCase = newConvertToUpperCase;
    }

    /*
     * (non-Javadoc)
     * @see waffle.spring.GrantedAuthorityFactory#createGrantedAuthority(waffle.windows.auth.WindowsAccount)
     */
    @Override
    public GrantedAuthority createGrantedAuthority(final WindowsAccount windowsAccount) {

        String grantedAuthorityString = windowsAccount.getFqn();

        if (this.prefix != null) {
            grantedAuthorityString = this.prefix + grantedAuthorityString;
        }

        if (this.convertToUpperCase) {
            grantedAuthorityString = grantedAuthorityString.toUpperCase();
        }

        return new SimpleGrantedAuthority(grantedAuthorityString);
    }
}