com.bstek.dorado.view.resolver.PageOutputUtils.java Source code

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Here is the source code for com.bstek.dorado.view.resolver.PageOutputUtils.java

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/*
 * This file is part of Dorado 7.x (http://dorado7.bsdn.org).
 * 
 * Copyright (c) 2002-2012 BSTEK Corp. All rights reserved.
 * 
 * This file is dual-licensed under the AGPLv3 (http://www.gnu.org/licenses/agpl-3.0.html) 
 * and BSDN commercial (http://www.bsdn.org/licenses) licenses.
 * 
 * If you are unsure which license is appropriate for your use, please contact the sales department
 * at http://www.bstek.com/contact.
 */

package com.bstek.dorado.view.resolver;

import java.io.IOException;
import java.io.Writer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

import com.bstek.dorado.core.Configure;
import com.bstek.dorado.core.Context;
import com.bstek.dorado.view.View;
import com.bstek.dorado.view.output.OutputContext;
import com.bstek.dorado.view.output.OutputUtils;
import com.bstek.dorado.view.output.Outputter;
import com.bstek.dorado.web.WebConfigure;

/**
 * @author Benny Bao (mailto:benny.bao@bstek.com)
 * @since 2011-6-1
 */
public abstract class PageOutputUtils {

    public static View getView(HttpServletRequest request) {
        return (View) request.getAttribute(View.class.getName());
    }

    private static OutputContext getOutputContext(HttpServletRequest request, Writer writer) {
        OutputContext outputContext = (OutputContext) request.getAttribute(OutputContext.class.getName());
        if (outputContext == null) {
            outputContext = new OutputContext(writer);
            request.setAttribute(OutputContext.class.getName(), outputContext);

            outputContext
                    .setShouldOutputDataTypes(WebConfigure.getBoolean("view.outputDataTypesInPageTemplate", true));
            outputContext.setUsePrettyJson(Configure.getBoolean("view.outputPrettyJson"));
        }
        return outputContext;
    }

    public static final void outputHeader(View view, HttpServletRequest request, HttpServletResponse response,
            Writer writer) throws Exception {
        OutputContext outputContext = getOutputContext(request, writer);
        Context context = Context.getCurrent();
        Outputter outputter = (Outputter) context.getServiceBean("pageHeaderOutputter");
        outputter.output(view, outputContext);
    }

    public static final void outputFooter(View view, HttpServletRequest request, HttpServletResponse response,
            Writer writer) throws Exception {
        OutputContext outputContext = getOutputContext(request, writer);
        Context context = Context.getCurrent();
        Outputter outputter = (Outputter) context.getServiceBean("pageFooterOutputter");
        outputter.output(new PageFooterOutputter.ViewWrapper(view, request, response), outputContext);
    }

    public static void outputException(Writer writer, Throwable throwable) throws IOException {
        writer.append("<h1 style=\"font-size:12pt; color:red\">");
        OutputUtils.outputString(writer,
                StringUtils.defaultString(throwable.getMessage(), throwable.getClass().getName()));
        writer.append("</h1>\n");
        writer.append("<ul>\n");
        StackTraceElement[] stes = throwable.getStackTrace();
        for (int i = 0; i < stes.length; i++) {
            StackTraceElement ste = stes[i];
            writer.append("<li>").append("at ");
            OutputUtils.outputString(writer, ste.toString());
            writer.append("</li>\n");
        }
        writer.append("</ul>\n");
    }
}