Examples with GraphValidationException org.eclipse.elk.core.validation.GraphValidationException used on opensource projects

Example 1 with GraphValidationException

use of org.eclipse.elk.core.validation.GraphValidationException in project elk by eclipse.

the class ElkUtil method applyVisitorsWithValidation.

/**
 * Apply the given graph element visitors to the content of the given graph. If validators are involved
 * and at least one error is found, a {@link GraphValidationException} is thrown.
 *
 * @param graph the graph the visitors shall be applied to.
 * @param visitors the visitors to apply.
 * @throws GraphValidationException if an error is found while validating the graph
 */
public static void applyVisitorsWithValidation(final ElkNode graph, final IGraphElementVisitor... visitors) throws GraphValidationException {
    applyVisitors(graph, visitors);
    // Gather validator results and generate an error message
    List<GraphIssue> allIssues = null;
    for (int i = 0; i < visitors.length; i++) {
        if (visitors[i] instanceof IValidatingGraphElementVisitor) {
            Collection<GraphIssue> issues = ((IValidatingGraphElementVisitor) visitors[i]).getIssues();
            if (!issues.isEmpty()) {
                if (allIssues == null) {
                    allIssues = new ArrayList<GraphIssue>(issues);
                } else {
                    allIssues.addAll(issues);
                }
            }
        }
    }
    // TODO print warnings to log if there are no errors
    if (allIssues != null && allIssues.stream().anyMatch(issue -> issue.getSeverity() == GraphIssue.Severity.ERROR)) {
        StringBuilder message = new StringBuilder();
        for (GraphIssue issue : allIssues) {
            if (message.length() > 0) {
                message.append("\n");
            }
            message.append(issue.getSeverity()).append(": ").append(issue.getMessage()).append("\n\tat ");
            ElkUtil.printElementPath(issue.getElement(), message);
        }
        throw new GraphValidationException(message.toString(), allIssues);
    }
}