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A Java full-stack web framework with programmatic configuration instead of XML and Annotations.
/*
* Mentawai Web Framework http://mentawai.lohis.com.br/
* Copyright (C) 2005 Sergio Oliveira Jr. ([email protected])
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.mentawai.ajax;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.mentawai.ajax.renderer.ResultRenderer;
import org.mentawai.core.Action;
import org.mentawai.core.Consequence;
import org.mentawai.core.ConsequenceException;
import org.mentawai.core.Output;
import org.mentawai.util.DebugServletFilter;
import org.mentawai.util.HttpUtils;
public class AjaxConsequence implements Consequence {
public static String OBJECT = "ajax_object";
public static String DEFAULT_CHARSET = "UTF-8";
private String keyForObject = OBJECT;
private final AjaxRenderer ajaxRenderer;
private boolean pretty;
public AjaxConsequence(AjaxRenderer renderer) {
this(renderer, true);
}
public AjaxConsequence(AjaxRenderer renderer, boolean pretty) {
this.ajaxRenderer = renderer;
this.pretty = pretty;
}
public AjaxConsequence keyForObject(String key) {
this.keyForObject = key;
return this;
}
public AjaxConsequence source(String key) {
return keyForObject(key);
}
/**
* Prints in the request's output the ajax response. The ajax response is supplied by the AjaxRenderer.
*/
public void execute(Action a, String result, HttpServletRequest req, HttpServletResponse res) throws ConsequenceException {
Output output = a.getOutput();
Object obj = null;
if (keyForObject == null || !output.has(keyForObject)) {
if (ajaxRenderer.getClass().equals(ResultRenderer.class)) {
// render the result...
obj = result;
} else {
// remove debug... For ajax it does not make sense anyways to have debug mode...
output.removeValue(DebugServletFilter.DEBUG_KEY);
// render the whole output !!!
obj = output;
}
} else {
obj = a.getOutput().getValue(keyForObject);
}
try {
StringBuilder sb = new StringBuilder(64);
sb.append(ajaxRenderer.getContentType()).append("; charset=").append(ajaxRenderer.getCharset());
res.setContentType(sb.toString());
String s = ajaxRenderer.encode(obj, a.getLocale(), pretty);
HttpUtils.disableCache(res);
PrintWriter printWriter = res.getWriter();
printWriter.print(s);
printWriter.flush();
} catch (IOException e) {
throw new ConsequenceException("Exception while writing the renderized document: " + e.getMessage(), e);
} catch (Exception e) {
throw new ConsequenceException("Exception while renderizing with render " + ajaxRenderer.getClass() + ": " + e.getMessage(), e);
}
}
}