2 * Copyright (c) 2018 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.repo;
10 import static com.google.common.base.Verify.verifyNotNull;
11 import static java.util.Objects.requireNonNull;
13 import java.util.Optional;
14 import org.antlr.v4.runtime.tree.ParseTree;
15 import org.opendaylight.yangtools.yang.common.QName;
16 import org.opendaylight.yangtools.yang.common.QNameModule;
17 import org.opendaylight.yangtools.yang.common.YangConstants;
18 import org.opendaylight.yangtools.yang.common.YangVersion;
19 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
20 import org.opendaylight.yangtools.yang.parser.antlr.YangStatementParser.ArgumentContext;
21 import org.opendaylight.yangtools.yang.parser.antlr.YangStatementParser.KeywordContext;
22 import org.opendaylight.yangtools.yang.parser.antlr.YangStatementParser.StatementContext;
23 import org.opendaylight.yangtools.yang.parser.spi.source.DeclarationInTextSource;
24 import org.opendaylight.yangtools.yang.parser.spi.source.PrefixToModule;
25 import org.opendaylight.yangtools.yang.parser.spi.source.QNameToStatementDefinition;
26 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
27 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
28 import org.opendaylight.yangtools.yang.parser.spi.source.StatementWriter;
29 import org.opendaylight.yangtools.yang.parser.spi.source.StatementWriter.ResumedStatement;
31 class StatementContextVisitor {
32 private final QNameToStatementDefinition stmtDef;
33 private final ArgumentContextUtils utils;
34 private final StatementWriter writer;
35 private final PrefixToModule prefixes;
36 private final String sourceName;
38 StatementContextVisitor(final String sourceName, final StatementWriter writer,
39 final QNameToStatementDefinition stmtDef, final PrefixToModule prefixes, final YangVersion yangVersion) {
40 this.writer = requireNonNull(writer);
41 this.stmtDef = requireNonNull(stmtDef);
42 this.utils = ArgumentContextUtils.forVersion(yangVersion);
43 this.sourceName = sourceName;
44 this.prefixes = prefixes;
47 void visit(final StatementContext context) {
48 processStatement(0, context);
52 * Based on identifier read from source and collections of relevant prefixes and statement definitions mappings
53 * provided for actual phase, method resolves and returns valid QName for declared statement to be written.
54 * This applies to any declared statement, including unknown statements.
56 * @param prefixes collection of all relevant prefix mappings supplied for actual parsing phase
57 * @param stmtDef collection of all relevant statement definition mappings provided for actual parsing phase
58 * @param keywordText statement keyword text to parse from source
59 * @param ref Source reference
60 * @return valid QName for declared statement to be written, or null
62 QName getValidStatementDefinition(final String keywordText, final StatementSourceReference ref) {
63 final int firstColon = keywordText.indexOf(':');
64 if (firstColon == -1) {
65 final StatementDefinition def = stmtDef.get(QName.create(YangConstants.RFC6020_YIN_MODULE, keywordText));
66 return def != null ? def.getStatementName() : null;
69 SourceException.throwIf(firstColon == keywordText.length() - 1
70 || keywordText.indexOf(':', firstColon + 1) != -1, ref, "Malformed statement '%s'", keywordText);
72 if (prefixes == null) {
73 // No prefixes to look up from
77 final String prefix = keywordText.substring(0, firstColon);
78 final QNameModule qNameModule = prefixes.get(prefix);
79 if (qNameModule == null) {
80 // Failed to look the namespace
84 final String localName = keywordText.substring(firstColon + 1);
85 final StatementDefinition foundStmtDef = resolveStatement(qNameModule, localName);
86 return foundStmtDef != null ? foundStmtDef.getStatementName() : null;
89 StatementDefinition resolveStatement(final QNameModule module, final String localName) {
90 return stmtDef.get(QName.create(module, localName));
93 private boolean processStatement(final int myOffset, final StatementContext ctx) {
94 final Optional<? extends ResumedStatement> optResumed = writer.resumeStatement(myOffset);
95 final StatementSourceReference ref;
96 if (optResumed.isPresent()) {
97 final ResumedStatement resumed = optResumed.get();
98 if (resumed.isFullyDefined()) {
102 ref = resumed.getSourceReference();
104 final String keywordTxt = verifyNotNull(ctx.getChild(KeywordContext.class, 0)).getText();
105 ref = DeclarationInTextSource.atPosition(sourceName, ctx.getStart().getLine(),
106 ctx.getStart().getCharPositionInLine());
107 final QName def = getValidStatementDefinition(keywordTxt, ref);
112 final ArgumentContext argumentCtx = ctx.getChild(ArgumentContext.class, 0);
113 final String argument = argumentCtx == null ? null : utils.stringFromStringContext(argumentCtx, ref);
114 writer.startStatement(myOffset, def, argument, ref);
118 boolean fullyDefined = true;
119 if (ctx.children != null) {
120 for (ParseTree s : ctx.children) {
121 if (s instanceof StatementContext) {
122 if (!processStatement(childOffset++, (StatementContext) s)) {
123 fullyDefined = false;
129 writer.storeStatement(childOffset, fullyDefined);
130 writer.endStatement(ref);