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 org.antlr.v4.runtime.tree.ParseTree;
14 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser.ArgumentContext;
15 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser.KeywordContext;
16 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser.StatementContext;
17 import org.opendaylight.yangtools.yang.common.QName;
18 import org.opendaylight.yangtools.yang.common.QNameModule;
19 import org.opendaylight.yangtools.yang.common.YangConstants;
20 import org.opendaylight.yangtools.yang.common.YangVersion;
21 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
22 import org.opendaylight.yangtools.yang.parser.spi.source.DeclarationInTextSource;
23 import org.opendaylight.yangtools.yang.parser.spi.source.PrefixToModule;
24 import org.opendaylight.yangtools.yang.parser.spi.source.QNameToStatementDefinition;
25 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
26 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
27 import org.opendaylight.yangtools.yang.parser.spi.source.StatementWriter;
29 class StatementContextVisitor {
30 private final QNameToStatementDefinition stmtDef;
31 private final StatementWriter writer;
32 private final YangVersion yangVersion;
33 private final PrefixToModule prefixes;
34 private final String sourceName;
36 StatementContextVisitor(final String sourceName, final StatementWriter writer,
37 final QNameToStatementDefinition stmtDef, final PrefixToModule prefixes, final YangVersion yangVersion) {
38 this.writer = requireNonNull(writer);
39 this.stmtDef = requireNonNull(stmtDef);
40 this.yangVersion = requireNonNull(yangVersion);
41 this.sourceName = sourceName;
42 this.prefixes = prefixes;
45 void visit(final StatementContext context) {
46 processStatement(0, context);
50 * Based on identifier read from source and collections of relevant prefixes and statement definitions mappings
51 * provided for actual phase, method resolves and returns valid QName for declared statement to be written.
52 * This applies to any declared statement, including unknown statements.
54 * @param prefixes collection of all relevant prefix mappings supplied for actual parsing phase
55 * @param stmtDef collection of all relevant statement definition mappings provided for actual parsing phase
56 * @param keywordText statement keyword text to parse from source
57 * @param ref Source reference
58 * @return valid QName for declared statement to be written, or null
60 QName getValidStatementDefinition(final String keywordText, final StatementSourceReference ref) {
61 final int firstColon = keywordText.indexOf(':');
62 if (firstColon == -1) {
63 final StatementDefinition def = stmtDef.get(QName.create(YangConstants.RFC6020_YIN_NAMESPACE, keywordText));
64 return def != null ? def.getStatementName() : null;
67 SourceException.throwIf(firstColon == keywordText.length() - 1
68 || keywordText.indexOf(':', firstColon + 1) != -1, ref, "Malformed statement '%s'", keywordText);
70 if (prefixes == null) {
71 // No prefixes to look up from
75 final String prefix = keywordText.substring(0, firstColon);
76 final QNameModule qNameModule = prefixes.get(prefix);
77 if (qNameModule == null) {
78 // Failed to look the namespace
82 final String localName = keywordText.substring(firstColon + 1);
83 final StatementDefinition foundStmtDef = resolveStatement(qNameModule, localName);
84 return foundStmtDef != null ? foundStmtDef.getStatementName() : null;
87 StatementDefinition resolveStatement(final QNameModule module, final String localName) {
88 return stmtDef.get(QName.create(module, localName));
91 private void processStatement(final int myOffset, final StatementContext ctx) {
92 final String keywordTxt = verifyNotNull(ctx.getChild(KeywordContext.class, 0)).getText();
93 final StatementSourceReference ref = DeclarationInTextSource.atPosition(sourceName, ctx.getStart().getLine(),
94 ctx.getStart().getCharPositionInLine());
95 final QName def = getValidStatementDefinition(keywordTxt, ref);
100 final ArgumentContext argumentCtx = ctx.getChild(ArgumentContext.class, 0);
101 final String argument = argumentCtx == null ? null
102 : ArgumentContextUtils.stringFromStringContext(argumentCtx, yangVersion, ref);
103 writer.startStatement(myOffset, def, argument, ref);
105 if (ctx.children != null) {
107 for (ParseTree s : ctx.children) {
108 if (s instanceof StatementContext) {
109 processStatement(childOffset++, (StatementContext) s);
114 writer.endStatement(ref);