2 * Copyright (c) 2019 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.yang.parser.rfc7950.stmt;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.annotations.Beta;
13 import javax.xml.xpath.XPathExpressionException;
14 import org.eclipse.jdt.annotation.NonNullByDefault;
15 import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
16 import org.opendaylight.yangtools.yang.model.util.RevisionAwareXPathImpl;
17 import org.opendaylight.yangtools.yang.parser.rfc7950.namespace.YangNamespaceContextNamespace;
18 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
19 import org.opendaylight.yangtools.yang.xpath.api.YangXPathExpression.QualifiedBound;
20 import org.opendaylight.yangtools.yang.xpath.api.YangXPathParser;
21 import org.opendaylight.yangtools.yang.xpath.api.YangXPathParserFactory;
22 import org.slf4j.Logger;
23 import org.slf4j.LoggerFactory;
27 public final class XPathSupport {
28 private static final Logger LOG = LoggerFactory.getLogger(XPathSupport.class);
30 private final YangXPathParserFactory factory;
32 public XPathSupport(final YangXPathParserFactory factory) {
33 this.factory = requireNonNull(factory);
36 public RevisionAwareXPath parseXPath(final StmtContext<?, ?, ?> ctx, final String xpath) {
37 final boolean isAbsolute = ArgumentUtils.isAbsoluteXPath(xpath);
38 final YangXPathParser.QualifiedBound parser = factory.newParser(
39 YangNamespaceContextNamespace.computeIfAbsent(ctx));
40 final QualifiedBound parsed;
42 parsed = parser.parseExpression(xpath);
43 } catch (XPathExpressionException e) {
44 LOG.warn("Argument \"{}\" is not valid XPath string at \"{}\"", xpath,
45 ctx.getStatementSourceReference(), e);
46 return new RevisionAwareXPathImpl(xpath, isAbsolute);
49 if (ctx.getRootVersion().compareTo(parsed.getYangVersion()) < 0) {
50 LOG.warn("{} features required in {} context to parse expression '{}' [at {}]",
51 parsed.getYangVersion().getReference(), ctx.getRootVersion().getReference(), xpath,
52 ctx.getStatementSourceReference());
54 return new WithExpressionImpl(xpath, isAbsolute, parsed);