update to delete property controller
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/* $This file is distributed under the terms of the license in /doc/license.txt$ */
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package edu.cornell.mannlib.vitro.webapp.controller.freemarker;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.List;
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import java.util.ArrayList;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import edu.cornell.mannlib.vitro.webapp.beans.Individual;
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import edu.cornell.mannlib.vitro.webapp.utils.pageDataGetter.MenuManagementDataUtils;
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import edu.cornell.mannlib.vitro.webapp.auth.requestedAction.Actions;
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import edu.cornell.mannlib.vitro.webapp.auth.requestedAction.usepages.ManageMenus;
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import edu.cornell.mannlib.vitro.webapp.beans.VClass;
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import edu.cornell.mannlib.vitro.webapp.beans.VClassGroup;
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import edu.cornell.mannlib.vitro.webapp.controller.VitroRequest;
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import edu.cornell.mannlib.vitro.webapp.controller.freemarker.responsevalues.RedirectResponseValues;
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import edu.cornell.mannlib.vitro.webapp.controller.freemarker.responsevalues.ResponseValues;
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import edu.cornell.mannlib.vitro.webapp.controller.freemarker.responsevalues.TemplateResponseValues;
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import edu.cornell.mannlib.vitro.webapp.dao.DisplayVocabulary;
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import edu.cornell.mannlib.vitro.webapp.dao.VitroVocabulary;
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import edu.cornell.mannlib.vitro.webapp.dao.jena.VClassGroupCache;
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import com.hp.hpl.jena.ontology.OntModel;
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import com.hp.hpl.jena.rdf.model.RDFNode;
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import com.hp.hpl.jena.rdf.model.Resource;
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import com.hp.hpl.jena.rdf.model.ResourceFactory;
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import com.hp.hpl.jena.rdf.model.Statement;
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import com.hp.hpl.jena.rdf.model.StmtIterator;
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import com.hp.hpl.jena.vocabulary.RDF;
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import edu.cornell.mannlib.vitro.webapp.edit.n3editing.VTwo.EditConfigurationUtils;
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import edu.cornell.mannlib.vitro.webapp.dao.WebappDaoFactory;
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import edu.cornell.mannlib.vitro.webapp.beans.ObjectProperty;
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import edu.cornell.mannlib.vitro.webapp.beans.DataProperty;
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import edu.cornell.mannlib.vitro.webapp.beans.DataPropertyStatement;
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/*
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* Custom deletion controller to which deletion requests from default property form are sent. May be replaced
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* later with additional features in process rdf form controller or alternative location.
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*/
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public class DeletePropertyController extends FreemarkerHttpServlet {
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private static final Log log = LogFactory.getLog(DeletePropertyController.class);
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//since forwarding from edit Request dispatch for now
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//TODO: Check what required actions would make sense here
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//public final static Actions REQUIRED_ACTIONS = new Actions(new ManageMenus());
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/*
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* @Override
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protected Actions requiredActions(VitroRequest vreq) {
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return REQUIRED_ACTIONS;
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}*/
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@Override
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//
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protected ResponseValues processRequest(VitroRequest vreq) {
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//if error conditions then return here
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String errorMessage = handleErrors(vreq);
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if(errorMessage != null) {
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return doErrorMessage(errorMessage);
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}
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//handle based on whether object property or data property
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if(EditConfigurationUtils.isObjectProperty(
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EditConfigurationUtils.getPredicateUri(vreq), vreq))
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{
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processObjectProperty(vreq);
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} else {
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processDataProperty(vreq);
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}
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//Get subject, predicate uri ,
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//Redirect
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//return new TemplateResponseValues(editConfig.getTemplate(), map);
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String redirectUrl = getRedirectUrl(vreq);
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return new RedirectResponseValues(redirectUrl, HttpServletResponse.SC_SEE_OTHER);
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}
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private String getRedirectUrl(VitroRequest vreq) {
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// TODO Auto-generated method stub
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String subjectUri = EditConfigurationUtils.getSubjectUri(vreq);
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String predicateUri = EditConfigurationUtils.getPredicateUri(vreq);
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int hashIndex = predicateUri.lastIndexOf("#");
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String localName = predicateUri.substring(hashIndex + 1);
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String redirectUrl = "/entity?uri=" + subjectUri;
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return null;
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}
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private String handleErrors(VitroRequest vreq) {
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//If subject or property empty then need to return error
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WebappDaoFactory wdf = vreq.getWebappDaoFactory();
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if(wdf == null) {
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return "could not get a WebappDaoFactory";
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}
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Individual subject = EditConfigurationUtils.getSubjectIndividual(vreq);
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if(subject == null) {
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return "could not find subject " + EditConfigurationUtils.getSubjectUri(vreq);
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}
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//if object property, check object property otherwise check data property
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String predicateUri = EditConfigurationUtils.getPredicateUri(vreq);
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if(EditConfigurationUtils.isObjectProperty(predicateUri, vreq)) {
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ObjectProperty prop = EditConfigurationUtils.getObjectProperty(vreq);
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if(prop == null) {
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return "In delete property controller, could not find object property " + predicateUri;
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}
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} else {
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DataProperty prop = EditConfigurationUtils.getDataProperty(vreq);
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if(prop == null) {
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return "In delete property controller, could not find data property " + predicateUri;
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}
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}
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return null;
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}
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private TemplateResponseValues doErrorMessage(String errorMessage) {
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HashMap<String,Object> map = new HashMap<String,Object>();
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map.put("errorMessage", errorMessage);
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return new TemplateResponseValues("error-message.ftl", map);
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}
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//process data property
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private void processDataProperty(VitroRequest vreq) {
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deleteDataPropertyStatement(vreq);
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}
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private void deleteDataPropertyStatement(VitroRequest vreq) {
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Individual subject = EditConfigurationUtils.getSubjectIndividual(vreq);
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//TODO: if null, need to throw or show error
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int dataHash = getDataHash(vreq);
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String predicateUri = EditConfigurationUtils.getPredicateUri(vreq);
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DataPropertyStatement dps = EditConfigurationUtils.getDataPropertyStatement(vreq, vreq.getSession(), dataHash, predicateUri);
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WebappDaoFactory wdf = vreq.getWebappDaoFactory();
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if(dps != null) {
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wdf.getDataPropertyStatementDao().deleteDataPropertyStatement(dps);
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}
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}
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private int getDataHash(VitroRequest vreq) {
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int dataHash = 0;
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String datapropKey = EditConfigurationUtils.getDataPropKey(vreq);
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if (datapropKey!=null && datapropKey.trim().length()>0) {
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try {
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dataHash = Integer.parseInt(datapropKey);
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} catch (NumberFormatException ex) {
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log.error("Cannot decode incoming dataprop key str " + datapropKey + "as integer hash");
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//throw new JspException("Cannot decode incoming datapropKey String value "+datapropKeyStr+" as an integer hash in datapropStmtDelete.jsp");
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}
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}
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return dataHash;
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}
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//process object property
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private void processObjectProperty(VitroRequest vreq) {
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ObjectProperty prop = EditConfigurationUtils.getObjectProperty(vreq);
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//if this property is true, it means the object needs to be deleted along with statement
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if(prop.getStubObjectRelation())
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{
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deleteObjectIndividual(vreq);
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}
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deleteObjectPropertyStatement(vreq);
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}
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private void deleteObjectPropertyStatement(VitroRequest vreq) {
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WebappDaoFactory wdf = vreq.getWebappDaoFactory();
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String objectUri = EditConfigurationUtils.getObjectUri(vreq);
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String subjectUri = EditConfigurationUtils.getSubjectUri(vreq);
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String predicateUri = EditConfigurationUtils.getPredicateUri(vreq);
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//delete object property statement
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wdf.getPropertyInstanceDao().deleteObjectPropertyStatement(subjectUri, predicateUri, objectUri);
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}
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private Individual getObjectIndividualForStubRelation(VitroRequest vreq, String objectUri) {
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Individual object = EditConfigurationUtils.getIndividual(vreq, objectUri);
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if(object == null) {
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WebappDaoFactory wadf = (WebappDaoFactory) vreq.getSession().getServletContext().getAttribute("webappDaoFactory");
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object = wadf.getIndividualDao().getIndividualByURI(objectUri);
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}
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return object;
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}
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private void deleteObjectIndividual(VitroRequest vreq) {
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String objectUri = EditConfigurationUtils.getObjectUri(vreq);
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Individual object = getObjectIndividualForStubRelation(vreq, objectUri);
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if(object != null) {
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log.warn("Deleting individual " + object.getName() + "since property has been set to force range object deletion");
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WebappDaoFactory wdf = vreq.getWebappDaoFactory();
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wdf.getIndividualDao().deleteIndividual(object);
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} else {
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//TODO: Throw error?
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log.error("could not find object as request attribute or in model " + objectUri);
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}
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}
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}
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