de.highbyte_le.weberknecht.request.view.ActionViewProcessorFactory.java Source code

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Here is the source code for de.highbyte_le.weberknecht.request.view.ActionViewProcessorFactory.java

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/*
 * ActionProcessorFactory.java (weberknecht)
 *
 * Copyright 2010-2012 Patrick Mairif.
 * The program is distributed under the terms of the Apache License (ALv2).
 * 
 * tabstop=4, charset=UTF-8
 */
package de.highbyte_le.weberknecht.request.view;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * create action processors
 * 
 * Custom processors can be configured via action-view-processors/action-view-processor in weberknecht.xml.
 * 
 * @author pmairif
 */
public class ActionViewProcessorFactory {
    private static final Log log = LogFactory.getLog(ActionViewProcessor.class);

    private final Map<String, Class<? extends ActionViewProcessor>> suffixProcessorMap = new HashMap<String, Class<? extends ActionViewProcessor>>();

    public ActionViewProcessorFactory() {
        //register default processors
        registerProcessor("do", WebActionProcessor.class);
        registerProcessor("", WebActionProcessor.class);
        registerProcessor("feed", FeedActionProcessor.class);
        registerProcessor("json", JsonActionProcessor.class);
        registerProcessor("data", DataActionProcessor.class);
    }

    /**
     * @param viewProcessorName
     *       unique name identifying the view processor (formerly called suffix)
     */
    public ActionViewProcessor createActionProcessor(String viewProcessorName, ServletContext servletContext) {
        ActionViewProcessor processor = null;

        Class<? extends ActionViewProcessor> clazz = suffixProcessorMap.get(viewProcessorName);
        if (clazz != null) {
            try {
                processor = clazz.newInstance();
                processor.setServletContext(servletContext);
                processor.setActionViewProcessorFactory(this);
            } catch (InstantiationException e) {
                log.error("createActionProcessor() - InstantiationException: " + e.getMessage(), e); //$NON-NLS-1$
            } catch (IllegalAccessException e) {
                log.error("createActionProcessor() - IllegalAccessException: " + e.getMessage(), e); //$NON-NLS-1$
            }
        }

        return processor;
    }

    @SuppressWarnings("unchecked")
    public void registerProcessor(String suffix, String className) throws ClassNotFoundException {
        Class<ActionViewProcessor> clazz = (Class<ActionViewProcessor>) Class.forName(className);
        registerProcessor(suffix, clazz);
    }

    public void registerProcessor(String suffix, Class<? extends ActionViewProcessor> clazz) {
        suffixProcessorMap.put(suffix, clazz);
    }
}