Examples with RootNode com.puppycrawl.tools.checkstyle.xpath.RootNode used on opensource projects

Example 1 with RootNode

use of com.puppycrawl.tools.checkstyle.xpath.RootNode in project checkstyle by checkstyle.

the class MatchXpathCheck method findMatchingNodesByXpathQuery.

/**
 * Find nodes that match query.
 *
 * @param rootAST root node
 * @return list of matching nodes
 * @throws IllegalStateException if evaluation of xpath query fails
 */
private List<DetailAST> findMatchingNodesByXpathQuery(DetailAST rootAST) {
    try {
        final RootNode rootNode = new RootNode(rootAST);
        final XPathDynamicContext xpathDynamicContext = xpathExpression.createDynamicContext(rootNode);
        final List<Item> matchingItems = xpathExpression.evaluate(xpathDynamicContext);
        return matchingItems.stream().map(item -> ((AbstractNode) item).getUnderlyingNode()).collect(Collectors.toList());
    } catch (XPathException ex) {
        throw new IllegalStateException("Evaluation of Xpath query failed: " + query, ex);
    }
}

Example 2 with RootNode

use of com.puppycrawl.tools.checkstyle.xpath.RootNode in project checkstyle by checkstyle.

the class XpathFilterElement method getItems.

/**
 * Returns list of nodes matching xpath expression given event.
 *
 * @param event {@code TreeWalkerAuditEvent} object
 * @return list of nodes matching xpath expression given event
 * @throws IllegalStateException if the xpath query could not be evaluated.
 */
private List<Item> getItems(TreeWalkerAuditEvent event) {
    final RootNode rootNode;
    if (event.getRootAst() == null) {
        rootNode = null;
    } else {
        rootNode = new RootNode(event.getRootAst());
    }
    final List<Item> items;
    try {
        final XPathDynamicContext xpathDynamicContext = xpathExpression.createDynamicContext(rootNode);
        items = xpathExpression.evaluate(xpathDynamicContext);
    } catch (XPathException ex) {
        throw new IllegalStateException("Cannot initialize context and evaluate query: " + xpathQuery, ex);
    }
    return items;
}

Example 3 with RootNode

use of com.puppycrawl.tools.checkstyle.xpath.RootNode in project checkstyle by checkstyle.

the class XpathUtilTest method testCreateChildren.

@Test
public void testCreateChildren() {
    final DetailAstImpl rootAst = new DetailAstImpl();
    final DetailAstImpl elementAst = new DetailAstImpl();
    rootAst.addChild(elementAst);
    final RootNode rootNode = new RootNode(rootAst);
    final List<AbstractNode> children = XpathUtil.createChildren(rootNode, rootNode, elementAst);
    assertWithMessage("Expected one child node").that(children).hasSize(1);
    assertWithMessage("Node depth should be 1").that(children.get(0).getDepth()).isEqualTo(1);
}

Example 4 with RootNode

use of com.puppycrawl.tools.checkstyle.xpath.RootNode in project checkstyle by checkstyle.

the class XpathUtil method printXpathBranch.

/**
 * Returns xpath query results on file as string.
 *
 * @param xpath query to evaluate
 * @param file file to run on
 * @return all results as string separated by delimiter
 * @throws CheckstyleException if some parsing error happens
 * @throws IOException if an error occurs
 */
public static String printXpathBranch(String xpath, File file) throws CheckstyleException, IOException {
    final XPathEvaluator xpathEvaluator = new XPathEvaluator(Configuration.newConfiguration());
    try {
        final RootNode rootNode = new RootNode(JavaParser.parseFile(file, JavaParser.Options.WITH_COMMENTS));
        final XPathExpression xpathExpression = xpathEvaluator.createExpression(xpath);
        final XPathDynamicContext xpathDynamicContext = xpathExpression.createDynamicContext(rootNode);
        final List<Item> matchingItems = xpathExpression.evaluate(xpathDynamicContext);
        return matchingItems.stream().map(item -> ((AbstractNode) item).getUnderlyingNode()).map(AstTreeStringPrinter::printBranch).collect(Collectors.joining(DELIMITER));
    } catch (XPathException ex) {
        final String errMsg = String.format(Locale.ROOT, "Error during evaluation for xpath: %s, file: %s", xpath, file.getCanonicalPath());
        throw new CheckstyleException(errMsg, ex);
    }
}