yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/impl/YangStatementParserListenerImpl.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.yangtools.yang.parser.impl;
   9
  10 import java.util.ArrayList;
  11 import java.util.List;
  12 import javax.annotation.concurrent.Immutable;
  13 import org.antlr.v4.runtime.tree.ParseTree;
  14 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser;
  15 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParserBaseListener;
  16 import org.opendaylight.yangtools.yang.common.QName;
  17 import org.opendaylight.yangtools.yang.common.YangConstants;
  18 import org.opendaylight.yangtools.yang.model.api.Rfc6020Mapping;
  19 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
  20 import org.opendaylight.yangtools.yang.parser.spi.source.DeclarationInTextSource;
  21 import org.opendaylight.yangtools.yang.parser.spi.source.PrefixToModule;
  22 import org.opendaylight.yangtools.yang.parser.spi.source.QNameToStatementDefinition;
  23 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  24 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
  25 import org.opendaylight.yangtools.yang.parser.spi.source.StatementWriter;
  26 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.TypeUtils;
  27 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.Utils;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 @Immutable
  32 public class YangStatementParserListenerImpl extends YangStatementParserBaseListener {
  33
  34     private StatementWriter writer;
  35     private final String sourceName;
  36     private QNameToStatementDefinition stmtDef;
  37     private PrefixToModule prefixes;
  38     private final List<String> toBeSkipped = new ArrayList<>();
  39     private boolean isType = false;
  40     private static final Logger LOG = LoggerFactory.getLogger(YangStatementParserListenerImpl.class);
  41
  42     public YangStatementParserListenerImpl(final String sourceName) {
  43         this.sourceName = sourceName;
  44     }
  45
  46     public void setAttributes(final StatementWriter writer, final QNameToStatementDefinition stmtDef) {
  47         this.writer = writer;
  48         this.stmtDef = stmtDef;
  49     }
  50
  51     public void setAttributes(final StatementWriter writer, final QNameToStatementDefinition stmtDef, final PrefixToModule prefixes) {
  52         this.writer = writer;
  53         this.stmtDef = stmtDef;
  54         this.prefixes = prefixes;
  55     }
  56
  57     @Override
  58     public void enterStatement(final YangStatementParser.StatementContext ctx) {
  59         final StatementSourceReference ref = DeclarationInTextSource.atPosition(sourceName, ctx.getText(), ctx
  60                 .getStart().getLine(), ctx.getStart().getCharPositionInLine());
  61         boolean action = true;
  62         QName identifier;
  63         for (int i = 0; i < ctx.getChildCount(); i++) {
  64             ParseTree child = ctx.getChild(i);
  65             if (child instanceof YangStatementParser.KeywordContext) {
  66                 try {
  67                     identifier = QName.create(YangConstants.RFC6020_YIN_MODULE,
  68                             ((YangStatementParser.KeywordContext) child).children.get(0).getText());
  69                     if (stmtDef != null && Utils.isValidStatementDefinition(prefixes, stmtDef, identifier) && toBeSkipped.isEmpty()) {
  70                         if (identifier.equals(Rfc6020Mapping.TYPE.getStatementName())) {
  71                             isType = true;
  72                         } else {
  73                             writer.startStatement(identifier, ref);
  74                         }
  75                     } else {
  76                         if (writer.getPhase().equals(ModelProcessingPhase.FULL_DECLARATION)) {
  77                             throw new IllegalArgumentException(identifier.getLocalName() + " is not a YANG statement " +
  78                                     "or use of extension. Source: " + ref);
  79                         } else {
  80                             action = false;
  81                             toBeSkipped.add(((YangStatementParser.KeywordContext) child).children.get(0).getText());
  82                         }
  83                     }
  84                 } catch (SourceException e) {
  85                     LOG.warn(e.getMessage(), e);
  86                 }
  87             } else if (child instanceof YangStatementParser.ArgumentContext) {
  88                 try {
  89                     final String argument = Utils.stringFromStringContext((YangStatementParser.ArgumentContext) child);
  90                     if (isType) {
  91                             if (TypeUtils.isYangTypeBodyStmtString(argument)) {
  92                                 writer.startStatement(QName.create(YangConstants.RFC6020_YIN_MODULE, argument), ref);
  93                             } else {
  94                                 writer.startStatement(QName.create(YangConstants.RFC6020_YIN_MODULE, Rfc6020Mapping
  95                                         .TYPE.getStatementName().getLocalName()), ref);
  96                             }
  97                         writer.argumentValue(argument, ref);
  98                         isType = false;
  99                     } else if (action) {
 100                         writer.argumentValue(Utils.stringFromStringContext((YangStatementParser.ArgumentContext) child), ref);
 101                     } else {
 102                         action = true;
 103                     }
 104                 } catch (SourceException e) {
 105                     LOG.warn(e.getMessage(), e);
 106                 }
 107             }
 108
 109         }
 110     }
 111
 112     @Override
 113     public void exitStatement(final YangStatementParser.StatementContext ctx) {
 114         final StatementSourceReference ref = DeclarationInTextSource.atPosition(sourceName, ctx.getText(), ctx.getStart().getLine(), ctx
 115                 .getStart().getCharPositionInLine());
 116         for (int i = 0; i < ctx.getChildCount(); i++) {
 117             ParseTree child = ctx.getChild(i);
 118             if (child instanceof YangStatementParser.KeywordContext) {
 119                 try {
 120                     String statementName = ((YangStatementParser.KeywordContext) child).children.get(0).getText();
 121                     QName identifier = QName.create(YangConstants.RFC6020_YIN_MODULE, statementName);
 122                     if (stmtDef != null && Utils.isValidStatementDefinition(prefixes, stmtDef, identifier) && toBeSkipped.isEmpty()) {
 123                         writer.endStatement(ref);
 124                     }
 125
 126                     if (toBeSkipped.contains(statementName)) {
 127                         toBeSkipped.remove(statementName);
 128                     }
 129                 } catch (SourceException e) {
 130                     LOG.warn(e.getMessage(), e);
 131                 }
 132             }
 133         }
 134     }
 135 }