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