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package com.sun.faces.context;

import javax.servlet.ServletContext;

/**
 * A utility class for dealing with context-param entries.
 */
public class ContextParamUtils {

    /**
     * Constructor.
     */
    private ContextParamUtils() {
        // nothing to do here.
    }

    /**
     * Get the value.
     *
     * @param servletContext the servlet context.
     * @param contextParam the context-param.
     * @return the value.
     */
    public static Object getValue(ServletContext servletContext, ContextParam contextParam) {
        Object result = contextParam.getDefaultValue();
        if (servletContext.getInitParameter(contextParam.getName()) != null) {
            if (contextParam.getType().equals(Boolean.class)) {
                result = Boolean.valueOf(servletContext.getInitParameter(contextParam.getName()));
            } else if (contextParam.getType().equals(Integer.class)) {
                result = Integer.valueOf(servletContext.getInitParameter(contextParam.getName()));
            }
        }
        return result;
    }

    /**
     * Get the value.
     *
     * @param  the type.
     * @param servletContext the servlet context.
     * @param contextParam the context-param.
     * @param clazz the class.
     * @return the value.
     */
    public static  T getValue(ServletContext servletContext, ContextParam contextParam, Class clazz) {
        return (T) clazz.cast(getValue(servletContext, contextParam));
    }
}