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Client library used for adding authentication to http messages as required by IdentityX Rest Services

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/*
* Copyright Daon.
*
* 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.
*/

package com.identityx.auth.impl;

import com.identityx.auth.def.IRequestAuthenticator;
import com.identityx.auth.def.IRequestAuthenticatorFactory;
import com.identityx.auth.impl.AuthenticationScheme;
import com.identityx.auth.lang.Classes;
import com.identityx.auth.support.RequestAuthenticationException;

/**
 * This default factory is responsible of creating a {@link IRequestAuthenticator} out of a given {@link AuthenticationScheme}
 * 
 */ 
public class DefaultRequestAuthenticatorFactory implements IRequestAuthenticatorFactory {

    /**
     * Creates a {@link IRequestAuthenticator} out of the given {@link AuthenticationScheme}.
     *
     */
    public IRequestAuthenticator create(AuthenticationScheme scheme) {

        if (scheme == null) {
            //By default, this factory creates a digest authentication when a scheme is not defined
            //return new DigestRequestAuthenticator();
        	return null;
        }

        IRequestAuthenticator requestAuthenticator;

        try {
            requestAuthenticator = (IRequestAuthenticator) Classes.newInstance(scheme.getRequestAuthenticatorClassName());
        } catch (RuntimeException ex) {
            throw new RequestAuthenticationException("There was an error instantiating " + scheme.getRequestAuthenticatorClassName());
        }

        return requestAuthenticator;
    }

}