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package eu.etaxonomy.taxeditor.editor.validation;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Set;
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import javax.xml.validation.Validator;
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import org.eclipse.core.resources.IMarker;
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import org.eclipse.core.resources.IResource;
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import org.eclipse.core.resources.IWorkspaceRoot;
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import org.eclipse.core.resources.ResourcesPlugin;
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import org.eclipse.core.runtime.CoreException;
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import eu.etaxonomy.cdm.model.validation.EntityConstraintViolation;
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import eu.etaxonomy.cdm.model.validation.EntityValidation;
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import eu.etaxonomy.cdm.model.validation.Severity;
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/**
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* A class responsible for refreshing problem markers coming from the CVI
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* (Cdmlib Validation Infrastructure).
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*
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* @author ayco_holleman
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*
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*/
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/*
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* See following for problems with icons in Problems view
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* http://stackoverflow.com
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* /questions/13497258/markers-view-shows-my-marker-with-
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* a-red-square-insted-of-error-warning-icon
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* http://stackoverflow.com/questions/2888207
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* /eclipse-plugin-custom-icon-for-a-marker
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* http://www.eclipse.org/articles/Article-Mark%20My%20Words/mark-my-words.html
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* http
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* ://cubussapiens.hu/2010/11/markers-and-annotations-in-eclipse-for-error-feedback
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* /
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*
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* See here for difficulty of attaching markers to non-resources (files,
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* folders):
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* http://stackoverflow.com/questions/12493179/eclipse-virtual-resources
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*/
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public class MarkerManager {
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public static final String MARKER_TYPE_ID = "eu.etaxonomy.taxeditor.markers.validationerror"; //$NON-NLS-1$
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/**
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* The primary key (id) of the EntityConstraintViolation record
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*/
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public static final String ATTRIB_DATABASE_ID = "databaseId"; //$NON-NLS-1$
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// The values of the following constants must correspond to the attributes
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// defined for the org.eclipse.core.resources.markers extension point in
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// plugin.xml
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/**
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* A user-friendly description of the type of the entity
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*/
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public static final String ATTRIB_USER_FRIENDLY_TYPE_NAME = "userFriendlyTypeName"; //$NON-NLS-1$
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/**
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* A user-friendly description of the entity
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*/
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public static final String ATTRIB_USER_FRIENDLY_DESCRIPTION = "userFriendlyDescription"; //$NON-NLS-1$
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/**
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* The field whose value violated a constraint
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*/
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public static final String ATTRIB_USER_FRIENDLY_FIELD_NAME = "userFriendlyFieldName"; //$NON-NLS-1$
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/**
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* The value violating a constraint
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*/
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public static final String ATTRIB_INVALID_VALUE = "invalidValue"; //$NON-NLS-1$
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/**
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* The message from the {@link Validator} about what was wrong.
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*/
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public static final String ATTRIB_VALIDATOR_MESSAGE = "validatorMessage"; //$NON-NLS-1$
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/**
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* The class of the {@link Validator} coding for the constraint
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*/
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public static final String ATTRIB_VALIDATOR_CLASS = "validatorClass"; //$NON-NLS-1$
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/**
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* The class of the validated entity
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*/
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public static final String ATTRIB_ENTITY_CLASS = "entityClass"; //$NON-NLS-1$
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/**
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* The id of the validated entity
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*/
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public static final String ATTRIB_ENTITY_ID = "entityId"; //$NON-NLS-1$
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private final List<EntityConstraintViolation> problems;
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MarkerManager(List<EntityValidation> results) {
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this.problems = new ArrayList<EntityConstraintViolation>();
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for (EntityValidation result : results) {
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Set<EntityConstraintViolation> problemsPerEntity = result.getEntityConstraintViolations();
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for (EntityConstraintViolation problem : problemsPerEntity) {
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problem.setEntityValidation(result);
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problems.add(problem);
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}
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}
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//MessagingUtils.info("Number of validation errors: " + problems.size());
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}
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/**
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* Delete all markers that refer to errors that do not exist any longer
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* (i.e. the corresponding database record has been deleted).
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*
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* @return The number of deleted markers
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*
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* @throws CoreException
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*/
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int deleteObsoleteMarkers() throws CoreException {
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int i = 0;
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IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
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IMarker[] markers = root.findMarkers(MARKER_TYPE_ID, true, IResource.DEPTH_INFINITE);
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for (IMarker marker : markers) {
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if (isObsoleteMarker(marker)) {
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++i;
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marker.delete();
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}
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}
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//MessagingUtils.info("Obsolete markers: " + i);
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return i;
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}
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/**
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* Create markers for new errors (i.e. no marker has been created for them
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* yet).
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*
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* @return The number of new markers
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*
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* @throws CoreException
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*/
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int createMarkers() throws CoreException {
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int i = 0;
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IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
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IMarker[] markers = root.findMarkers(MARKER_TYPE_ID, true, IResource.DEPTH_INFINITE);
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for (EntityConstraintViolation problem : problems) {
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if (isNewProblem(problem, markers)) {
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++i;
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IMarker marker = root.createMarker(MARKER_TYPE_ID);
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if (problem.getSeverity() == Severity.ERROR) {
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marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
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} else if (problem.getSeverity() == Severity.WARNING) {
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marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_WARNING);
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} else {
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marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_INFO);
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}
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EntityValidation result = problem.getEntityValidation();
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marker.setAttribute(IMarker.MESSAGE, problem.getMessage());
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marker.setAttribute(ATTRIB_DATABASE_ID, new Integer(problem.getId()));
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marker.setAttribute(ATTRIB_USER_FRIENDLY_TYPE_NAME, result.getUserFriendlyTypeName());
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marker.setAttribute(ATTRIB_USER_FRIENDLY_DESCRIPTION, result.getUserFriendlyDescription());
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marker.setAttribute(ATTRIB_USER_FRIENDLY_FIELD_NAME, problem.getUserFriendlyFieldName());
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marker.setAttribute(ATTRIB_VALIDATOR_MESSAGE, problem.getMessage());
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marker.setAttribute(ATTRIB_INVALID_VALUE, problem.getInvalidValue());
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marker.setAttribute(ATTRIB_VALIDATOR_CLASS, problem.getValidator());
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marker.setAttribute(ATTRIB_ENTITY_CLASS, result.getValidatedEntityClass());
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marker.setAttribute(ATTRIB_ENTITY_ID, result.getValidatedEntityId());
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}
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}
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//MessagingUtils.info("New problems: " + i);
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return i;
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}
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private boolean isObsoleteMarker(IMarker marker) throws CoreException {
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for (EntityConstraintViolation problem : problems) {
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if (isMarkerForProblem(marker, problem)) {
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return false;
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}
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}
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return true;
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}
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private static boolean isNewProblem(EntityConstraintViolation problem, IMarker[] markers) throws CoreException {
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for (IMarker marker : markers) {
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if (isMarkerForProblem(marker, problem)) {
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return false;
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}
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}
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return true;
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}
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private static boolean isMarkerForProblem(IMarker marker, EntityConstraintViolation problem) throws CoreException {
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if (isEqual(marker, ATTRIB_DATABASE_ID, new Integer(problem.getId()))) {
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return true;
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}
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EntityValidation result = problem.getEntityValidation();
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if (!isEqual(marker, ATTRIB_ENTITY_ID, result.getValidatedEntityId())) {
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return false;
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}
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if (!isEqual(marker, ATTRIB_INVALID_VALUE, problem.getInvalidValue())) {
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return false;
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}
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if (!isEqual(marker, ATTRIB_ENTITY_CLASS, result.getValidatedEntityClass())) {
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return false;
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}
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if (!isEqual(marker, ATTRIB_USER_FRIENDLY_FIELD_NAME, problem.getUserFriendlyFieldName())) {
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return false;
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}
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if (!isEqual(marker, ATTRIB_VALIDATOR_CLASS, problem.getValidator())) {
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return false;
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}
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return true;
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}
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private static boolean isEqual(IMarker marker, String attribute, Object value) throws CoreException {
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Object val = marker.getAttribute(attribute);
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boolean equal;
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if (val == null) {
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equal = value == null;
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} else {
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equal = value != null && val.equals(value);
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}
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return equal;
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}
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}
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