PaymentModule.java

/*
 * Copyright 2010-2011 Ning, Inc.
 *
 * Ning 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:
 *
 *    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.ning.billing.payment.setup;

import java.util.Properties;

import org.skife.config.ConfigurationObjectFactory;

import com.google.inject.AbstractModule;
import com.google.inject.Key;
import com.ning.billing.payment.provider.PaymentProviderPlugin;

public class PaymentModule extends AbstractModule {
    private final Properties props;

    public PaymentModule() {
        this.props = System.getProperties();
    }

    public PaymentModule(Properties props) {
        this.props = props;
    }

    @SuppressWarnings("unchecked")
    protected void installPaymentProviderPlugin(PaymentConfig config) {
        String pluginClassName = config.getProviderPluginClass();

        if (pluginClassName == null) {
            throw new IllegalArgumentException("No payment provider plugin class configured");
        }
        Class<? extends PaymentProviderPlugin> pluginClass = null;

        try {
            pluginClass = (Class<? extends PaymentProviderPlugin>)Class.forName(pluginClassName);
        }
        catch (Exception ex) {
            throw new IllegalArgumentException("Illegal payment provider plugin class configured", ex);
        }
        bind(PaymentProviderPlugin.class).to(Key.get(pluginClass));
    }

    @Override
    protected void configure() {
        final PaymentConfig config = new ConfigurationObjectFactory(props).build(PaymentConfig.class);

        installPaymentProviderPlugin(config);
    }
}