2 * Copyright (c) 2017 Pantheon Technologies, 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.unique;
10 import com.google.common.base.CharMatcher;
11 import com.google.common.base.Splitter;
12 import com.google.common.collect.ImmutableSet;
13 import java.util.HashSet;
15 import java.util.regex.Pattern;
16 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
17 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
18 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
19 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Descendant;
20 import org.opendaylight.yangtools.yang.model.api.stmt.UniqueEffectiveStatement;
21 import org.opendaylight.yangtools.yang.model.api.stmt.UniqueStatement;
22 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.ArgumentUtils;
23 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
24 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
25 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
26 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
28 public final class UniqueStatementSupport
29 extends AbstractStatementSupport<Set<Descendant>, UniqueStatement, UniqueEffectiveStatement> {
31 * Support 'sep' ABNF rule in RFC7950 section 14. CRLF pattern is used to squash line-break from CRLF to LF form
32 * and then we use SEP_SPLITTER, which can operate on single characters.
34 private static final Pattern CRLF_PATTERN = Pattern.compile("\r\n", Pattern.LITERAL);
35 private static final Splitter SEP_SPLITTER = Splitter.on(CharMatcher.anyOf(" \t\n").precomputed())
38 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
39 YangStmtMapping.UNIQUE)
41 private static final UniqueStatementSupport INSTANCE = new UniqueStatementSupport();
43 private UniqueStatementSupport() {
44 super(YangStmtMapping.UNIQUE);
47 public static UniqueStatementSupport getInstance() {
52 public Set<Descendant> parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
53 final Set<Descendant> uniqueConstraints = parseUniqueConstraintArgument(ctx, value);
54 SourceException.throwIf(uniqueConstraints.isEmpty(), ctx.getStatementSourceReference(),
55 "Invalid argument value '%s' of unique statement. The value must contains at least "
56 + "one descendant schema node identifier.", value);
57 return uniqueConstraints;
61 public UniqueStatement createDeclared(final StmtContext<Set<Descendant>, UniqueStatement, ?> ctx) {
62 return new UniqueStatementImpl(ctx);
66 public UniqueEffectiveStatement createEffective(
67 final StmtContext<Set<Descendant>, UniqueStatement, UniqueEffectiveStatement> ctx) {
68 return new UniqueEffectiveStatementImpl(ctx);
72 protected SubstatementValidator getSubstatementValidator() {
73 return SUBSTATEMENT_VALIDATOR;
76 private static Set<Descendant> parseUniqueConstraintArgument(final StmtContext<?, ?, ?> ctx,
77 final String argumentValue) {
78 // deal with 'line-break' rule, which is either "\n" or "\r\n", but not "\r"
79 final String nocrlf = CRLF_PATTERN.matcher(argumentValue).replaceAll("\n");
81 final Set<Descendant> uniqueConstraintNodes = new HashSet<>();
82 for (final String uniqueArgToken : SEP_SPLITTER.split(nocrlf)) {
83 final SchemaNodeIdentifier nodeIdentifier = ArgumentUtils.nodeIdentifierFromPath(ctx, uniqueArgToken);
84 SourceException.throwIf(nodeIdentifier instanceof Absolute, ctx.getStatementSourceReference(),
85 "Unique statement argument '%s' contains schema node identifier '%s' "
86 + "which is not in the descendant node identifier form.", argumentValue, uniqueArgToken);
87 uniqueConstraintNodes.add((Descendant) nodeIdentifier);
89 return ImmutableSet.copyOf(uniqueConstraintNodes);