com.acciente.induction.init.TemplatingEngineInitializer.java Source code

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Here is the source code for com.acciente.induction.init.TemplatingEngineInitializer.java

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/*
 * Copyright 2008-2013 Acciente, LLC
 *
 * Acciente, LLC 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.acciente.induction.init;

import com.acciente.commons.lang.Strings;
import com.acciente.commons.reflect.ParameterProviderException;
import com.acciente.induction.dispatcher.model.ModelPool;
import com.acciente.induction.init.config.Config;
import com.acciente.induction.template.FreemarkerTemplatingEngine;
import com.acciente.induction.template.TemplatingEngine;
import com.acciente.induction.util.ObjectFactory;
import com.acciente.induction.util.ConstructorNotFoundException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.servlet.ServletConfig;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;

/**
 * Internal.
 * This class manages initialization of the templating engine based on the configured settings
 *
 * @created Apr 23, 2008
 *
 * @author Adinath Raveendra Raj
 */
public class TemplatingEngineInitializer {
    public static TemplatingEngine getTemplatingEngine(Config.Templating oTemplatingConfig, ModelPool oModelPool,
            ClassLoader oClassLoader, ServletConfig oServletConfig)
            throws ClassNotFoundException, IOException, InvocationTargetException, ConstructorNotFoundException,
            ParameterProviderException, IllegalAccessException, InstantiationException {
        TemplatingEngine oTemplatingEngine;
        String sTemplatingEngineClassName;
        Log oLog;

        oLog = LogFactory.getLog(TemplatingEngineInitializer.class);

        sTemplatingEngineClassName = oTemplatingConfig.getTemplatingEngine().getClassName();

        if (Strings.isEmpty(sTemplatingEngineClassName)) {
            // if no templating engine is configured use the freemarker engine as the default
            oTemplatingEngine = new FreemarkerTemplatingEngine(oTemplatingConfig, oClassLoader, oServletConfig);
        } else {
            oLog.info("loading user-defined templating engine: " + sTemplatingEngineClassName);

            Class oTemplatingEngineClass = oClassLoader
                    .loadClass(oTemplatingConfig.getTemplatingEngine().getClassName());

            oTemplatingEngine = (TemplatingEngine) ObjectFactory.createObject(oTemplatingEngineClass,
                    new Object[] { oServletConfig, oTemplatingConfig, oClassLoader },
                    new InitializerParameterProvider(oModelPool, "templating-engine-init"));
        }

        return oTemplatingEngine;
    }
}

// EOF