net.anotheria.anosite.bredcrambs.action.ShowUsagesOfDocumentAction Maven / Gradle / Ivy
package net.anotheria.anosite.bredcrambs.action;
import net.anotheria.anosite.bredcrambs.data.DocumentEnum;
import net.anotheria.asg.exception.ConstantNotFoundException;
import net.anotheria.maf.action.ActionCommand;
import net.anotheria.maf.action.ActionMapping;
import net.anotheria.maf.bean.FormBean;
import net.anotheria.maf.json.JSONResponse;
import net.anotheria.util.StringUtils;
import net.anotheria.webutils.actions.BaseAction;
import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
/**
* Action shows usages of specific element in cms.
*
* @author vzarva
*/
public class ShowUsagesOfDocumentAction extends BaseAction {
/**
* {@link Logger} instance.
*/
private static final Logger LOGGER = LoggerFactory.getLogger(ShowUsagesOfDocumentAction.class);
/**
* Encoding.
*/
private static final String UTF_8 = "UTF-8";
/**
* Content type.
*/
private static final String TEXT_X_JSON = "application/json";
/**
* Type of searched element.
*/
private static final String DOC_PARAM = "doc";
/**
* Id of searched element.
*/
private static final String SEARCHED_ELEMENT_ID_PARAM = "pId";
/**
* References to usages of current document.
*/
private static final String REFERENCES_ATTR = "references";
@Override
public ActionCommand execute(ActionMapping mapping, FormBean formBean, HttpServletRequest req, HttpServletResponse res) throws Exception {
JSONResponse response = new JSONResponse();
String doc = req.getParameter(DOC_PARAM);
String pId = req.getParameter(SEARCHED_ELEMENT_ID_PARAM);
if (StringUtils.isEmpty(doc) || StringUtils.isEmpty(pId)){
LOGGER.warn("Incoming parameters doc[" + doc + "] or pId[" + pId + "] is empty");
response.addError("Incoming parameters doc[" + doc + "] or pId[" + pId + "] is empty");
writeTextToResponse(res, response);
return null;
}
List references = new ArrayList();
try {
DocumentEnum DOC = DocumentEnum.getConstantByValue(doc);
references = DOC.findReferences(pId);
} catch (ConstantNotFoundException e) {
LOGGER.info("Usages for document["+doc+"] is not implemented",e);
response.addError("Usages for document["+doc+"] is not implemented");
writeTextToResponse(res,response);
return null;
}
JSONObject jsonReferences = new JSONObject();
jsonReferences.put(REFERENCES_ATTR,references);
response.setData(jsonReferences);
writeTextToResponse(res,response);
return null;
}
/**
* Writes specified text to response and flushes the stream.
*
* @param res
* {@link javax.servlet.http.HttpServletRequest}
* @param jsonResponse
* {@link net.anotheria.maf.json.JSONResponse}
* @throws java.io.IOException
* if an input or output exception occurred
* @throws org.json.JSONException
* on JSON create errors
*/
private void writeTextToResponse(final HttpServletResponse res, final JSONResponse jsonResponse) throws IOException, JSONException {
res.setCharacterEncoding(UTF_8);
res.setContentType(TEXT_X_JSON);
PrintWriter writer = res.getWriter();
writer.write(jsonResponse.toString());
writer.flush();
}
}