Speeded up ANTLR tree walk for statement parser.
[yangtools.git] / yang / yang-parser-impl / src / main / java / org / opendaylight / yangtools / yang / parser / impl / YangStatementParserListenerImpl.java
index 0aac6edbf575eae74cd831bb2025f5594a35582b..58aa60c1671e7a80ec4643db113dab28f10e2f70 100644 (file)
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  */
 package org.opendaylight.yangtools.yang.parser.impl;
 
+import com.google.common.base.Preconditions;
+import com.google.common.base.Throwables;
+import com.google.common.base.Verify;
 import java.util.ArrayList;
 import java.util.List;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import org.antlr.v4.runtime.tree.ParseTree;
+import javax.annotation.concurrent.Immutable;
 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser;
+import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser.ArgumentContext;
+import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser.KeywordContext;
 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParserBaseListener;
 import org.opendaylight.yangtools.yang.common.QName;
 import org.opendaylight.yangtools.yang.common.YangConstants;
+import org.opendaylight.yangtools.yang.model.api.Rfc6020Mapping;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
+import org.opendaylight.yangtools.yang.parser.spi.source.DeclarationInTextSource;
 import org.opendaylight.yangtools.yang.parser.spi.source.PrefixToModule;
 import org.opendaylight.yangtools.yang.parser.spi.source.QNameToStatementDefinition;
 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
 import org.opendaylight.yangtools.yang.parser.spi.source.StatementWriter;
+import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.TypeUtils;
 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.Utils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+@Immutable
 public class YangStatementParserListenerImpl extends YangStatementParserBaseListener {
 
     private StatementWriter writer;
-    private StatementSourceReference ref;
+    private final String sourceName;
     private QNameToStatementDefinition stmtDef;
     private PrefixToModule prefixes;
-    private List<String> toBeSkipped = new ArrayList<>();
+    private final List<String> toBeSkipped = new ArrayList<>();
+    private boolean isType = false;
     private static final Logger LOG = LoggerFactory.getLogger(YangStatementParserListenerImpl.class);
 
-    public YangStatementParserListenerImpl(StatementSourceReference ref) {
-        this.ref = ref;
+    public YangStatementParserListenerImpl(final String sourceName) {
+        this.sourceName = sourceName;
     }
 
-    public void setAttributes(StatementWriter writer, QNameToStatementDefinition stmtDef) {
+    public void setAttributes(final StatementWriter writer, final QNameToStatementDefinition stmtDef) {
         this.writer = writer;
         this.stmtDef = stmtDef;
     }
 
-    public void setAttributes(StatementWriter writer, QNameToStatementDefinition stmtDef, PrefixToModule prefixes) {
+    public void setAttributes(final StatementWriter writer, final QNameToStatementDefinition stmtDef, final PrefixToModule prefixes) {
         this.writer = writer;
         this.stmtDef = stmtDef;
         this.prefixes = prefixes;
     }
 
     @Override
-    public void enterStatement(YangStatementParser.StatementContext ctx) {
-        boolean action = true;
-        for (int i = 0; i < ctx.getChildCount(); i++) {
-            ParseTree child = ctx.getChild(i);
-            if (child instanceof YangStatementParser.KeywordContext) {
-                try {
-                    QName identifier = new QName(YangConstants.RFC6020_YIN_NAMESPACE,
-                            ((YangStatementParser.KeywordContext) child).children.get(0).getText());
-                    if (stmtDef != null && stmtDef.get(identifier) != null && toBeSkipped.isEmpty()) {
-                        writer.startStatement(identifier, ref);
+    public void enterStatement(final YangStatementParser.StatementContext ctx) {
+        final StatementSourceReference ref = DeclarationInTextSource.atPosition(sourceName, ctx
+                .getStart().getLine(), ctx.getStart().getCharPositionInLine());
+        final KeywordContext keywordCtx = Verify.verifyNotNull(ctx.getChild(KeywordContext.class, 0));
+        final ArgumentContext argumentCtx = ctx.getChild(ArgumentContext.class, 0);
+
+        String keywordTxt = keywordCtx.getText();
+        try {
+            // FIXME: This is broken for extensions - not all statements are in RFC6020 ns.
+            final QName identifier = QName.create(YangConstants.RFC6020_YIN_MODULE, keywordTxt);
+            if (stmtDef != null && Utils.isValidStatementDefinition(prefixes, stmtDef, identifier)
+                    && toBeSkipped.isEmpty()) {
+                final String argument = argumentCtx != null ? Utils.stringFromStringContext(argumentCtx) : null;
+                // See,s to be fishy specialcase
+                if (identifier.equals(Rfc6020Mapping.TYPE.getStatementName())) {
+                    Preconditions.checkArgument(argument != null);
+                    if (TypeUtils.isYangTypeBodyStmtString(argument)) {
+                        writer.startStatement(QName.create(YangConstants.RFC6020_YIN_MODULE, argument), ref);
                     } else {
-                        action = false;
-                        toBeSkipped.add(((YangStatementParser.KeywordContext) child).children.get(0).getText());
+                        writer.startStatement(QName.create(YangConstants.RFC6020_YIN_MODULE, Rfc6020Mapping
+                                .TYPE.getStatementName().getLocalName()), ref);
                     }
-                } catch (SourceException e) {
-                    LOG.warn(e.getMessage(), e);
-                }
-            } else if (child instanceof YangStatementParser.ArgumentContext) {
-                try {
-                    if (action) {
-                        writer.argumentValue(
-                                Utils.stringFromStringContext((YangStatementParser.ArgumentContext) child), ref);
-                    } else {
-                        action = true;
+                    writer.argumentValue(argument, ref);
+                } else {
+                    writer.startStatement(identifier, ref);
+                    if(argument != null) {
+                        writer.argumentValue(argument, ref);
                     }
-                } catch (SourceException e) {
-                    LOG.warn(e.getMessage(), e);
                 }
+            } else if (writer.getPhase().equals(ModelProcessingPhase.FULL_DECLARATION)) {
+                    throw new IllegalArgumentException(identifier.getLocalName() + " is not a YANG statement "
+                            + "or use of extension. Source: " + ref);
+            } else {
+                toBeSkipped.add(keywordTxt);
             }
-
+        } catch (SourceException e) {
+            throw Throwables.propagate(e);
         }
     }
 
     @Override
-    public void exitStatement(YangStatementParser.StatementContext ctx) {
-        for (int i = 0; i < ctx.getChildCount(); i++) {
-            ParseTree child = ctx.getChild(i);
-            if (child instanceof YangStatementParser.KeywordContext) {
-                try {
-                    String statementName = ((YangStatementParser.KeywordContext) child).children.get(0).getText();
-                    QName identifier = new QName(YangConstants.RFC6020_YIN_NAMESPACE, statementName);
-                    if (stmtDef != null && stmtDef.get(identifier) != null && toBeSkipped.isEmpty()) {
-                        writer.endStatement(ref);
-                    }
-
-                    if (toBeSkipped.contains(statementName)) {
-                        toBeSkipped.remove(statementName);
-                    }
-                } catch (SourceException e) {
-                    LOG.warn(e.getMessage(), e);
-                }
+    public void exitStatement(final YangStatementParser.StatementContext ctx) {
+        final StatementSourceReference ref = DeclarationInTextSource.atPosition(sourceName, ctx.getStart().getLine(), ctx
+                .getStart().getCharPositionInLine());
+        try {
+            KeywordContext keyword = ctx.getChild(KeywordContext.class, 0);
+            String statementName = keyword.getText();
+            QName identifier = QName.create(YangConstants.RFC6020_YIN_MODULE, statementName);
+            if (stmtDef != null && Utils.isValidStatementDefinition(prefixes, stmtDef, identifier)
+                    && toBeSkipped.isEmpty()) {
+                writer.endStatement(ref);
+            }
+            if (toBeSkipped.contains(statementName)) {
+                toBeSkipped.remove(statementName);
             }
+        } catch (SourceException e) {
+            LOG.warn(e.getMessage(), e);
         }
     }
 }