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.meta;
10 import com.google.common.base.CharMatcher;
11 import com.google.common.base.Splitter;
12 import com.google.common.collect.ImmutableList;
13 import com.google.common.collect.ImmutableSet;
14 import java.util.HashSet;
16 import java.util.regex.Pattern;
17 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
18 import org.opendaylight.yangtools.yang.model.api.meta.DeclarationReference;
19 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
20 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
21 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
22 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
23 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Descendant;
24 import org.opendaylight.yangtools.yang.model.api.stmt.UniqueEffectiveStatement;
25 import org.opendaylight.yangtools.yang.model.api.stmt.UniqueStatement;
26 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatementDecorators;
27 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatements;
28 import org.opendaylight.yangtools.yang.model.ri.stmt.EffectiveStatements;
29 import org.opendaylight.yangtools.yang.parser.api.YangParserConfiguration;
30 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.ArgumentUtils;
31 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
32 import org.opendaylight.yangtools.yang.parser.spi.meta.BoundStmtCtx;
33 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
34 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
35 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
36 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
38 public final class UniqueStatementSupport
39 extends AbstractStatementSupport<Set<Descendant>, UniqueStatement, UniqueEffectiveStatement> {
41 * Support 'sep' ABNF rule in RFC7950 section 14. CRLF pattern is used to squash line-break from CRLF to LF form
42 * and then we use SEP_SPLITTER, which can operate on single characters.
44 private static final Pattern CRLF_PATTERN = Pattern.compile("\r\n", Pattern.LITERAL);
45 private static final Splitter SEP_SPLITTER = Splitter.on(CharMatcher.anyOf(" \t\n").precomputed())
48 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR =
49 SubstatementValidator.builder(YangStmtMapping.UNIQUE).build();
51 public UniqueStatementSupport(final YangParserConfiguration config) {
52 // FIXME: This reflects what the current implementation does. We really want to define an adaptArgumentValue(),
53 // but how that plays with the argument and expectations needs to be investigated.
54 super(YangStmtMapping.UNIQUE, StatementPolicy.contextIndependent(), config, SUBSTATEMENT_VALIDATOR);
58 public ImmutableSet<Descendant> parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
59 final ImmutableSet<Descendant> uniqueConstraints = parseUniqueConstraintArgument(ctx, value);
60 SourceException.throwIf(uniqueConstraints.isEmpty(), ctx,
61 "Invalid argument value '%s' of unique statement. The value must contains at least one descendant schema "
62 + "node identifier.", value);
63 return uniqueConstraints;
67 protected UniqueStatement createDeclared(final BoundStmtCtx<Set<Descendant>> ctx,
68 final ImmutableList<DeclaredStatement<?>> substatements) {
69 return DeclaredStatements.createUnique(ctx.getRawArgument(), ctx.getArgument(), substatements);
73 protected UniqueStatement attachDeclarationReference(final UniqueStatement stmt,
74 final DeclarationReference reference) {
75 return DeclaredStatementDecorators.decorateUnique(stmt, reference);
79 protected UniqueEffectiveStatement createEffective(final Current<Set<Descendant>, UniqueStatement> stmt,
80 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
81 return EffectiveStatements.createUnique(stmt.declared(), substatements);
84 private static ImmutableSet<Descendant> parseUniqueConstraintArgument(final StmtContext<?, ?, ?> ctx,
85 final String argumentValue) {
86 // deal with 'line-break' rule, which is either "\n" or "\r\n", but not "\r"
87 final String nocrlf = CRLF_PATTERN.matcher(argumentValue).replaceAll("\n");
89 final Set<Descendant> uniqueConstraintNodes = new HashSet<>();
90 for (final String uniqueArgToken : SEP_SPLITTER.split(nocrlf)) {
91 final SchemaNodeIdentifier nodeIdentifier = ArgumentUtils.nodeIdentifierFromPath(ctx, uniqueArgToken);
92 SourceException.throwIf(nodeIdentifier instanceof Absolute, ctx,
93 "Unique statement argument '%s' contains schema node identifier '%s' which is not in the descendant "
94 + "node identifier form.", argumentValue, uniqueArgToken);
95 uniqueConstraintNodes.add((Descendant) nodeIdentifier);
97 return ImmutableSet.copyOf(uniqueConstraintNodes);