Examples with TreeVisitor org.antlr.runtime.tree.TreeVisitor used on opensource projects

Example 16 with TreeVisitor

use of org.antlr.runtime.tree.TreeVisitor in project cuba by cuba-platform.

the class QueryParserAstBased method getAllEntityNames.

@Override
public Set<String> getAllEntityNames() {
    TreeVisitor visitor = new TreeVisitor();
    EntitiesFinder finder = new EntitiesFinder();
    visitor.visit(getQueryAnalyzer().getTree(), finder);
    return finder.resolveEntityNames(model, getQueryAnalyzer().getRootQueryVariableContext());
}

Example 17 with TreeVisitor

use of org.antlr.runtime.tree.TreeVisitor in project cuba by cuba-platform.

the class QueryParserAstBased method getParamNames.

@Override
public Set<String> getParamNames() {
    TreeVisitor visitor = new TreeVisitor();
    ParameterCounter parameterCounter = new ParameterCounter(true);
    visitor.visit(getQueryAnalyzer().getTree(), parameterCounter);
    return parameterCounter.getParameterNames();
}

Example 18 with TreeVisitor

use of org.antlr.runtime.tree.TreeVisitor in project cuba by cuba-platform.

the class QueryAnalyzerTest method mixinJoinOnIntoTree.

@Test
public void mixinJoinOnIntoTree() throws RecognitionException {
    DomainModel model = prepareDomainModel();
    QueryTreeTransformer qa = new QueryTreeTransformer();
    qa.prepare(model, "select c from Car c");
    CommonTree tree = qa.getTree();
    CommonTree sources = (CommonTree) tree.getFirstChildWithType(JPA2Lexer.T_SOURCES);
    assertEquals(1, sources.getChildCount());
    assertTrue(sources.getChild(0) instanceof SelectionSourceNode);
    CommonTree source = (CommonTree) sources.getFirstChildWithType(JPA2Lexer.T_SOURCE);
    assertTrue(source.getChild(0) instanceof IdentificationVariableNode);
    JoinVariableNode join = Parser.parseJoinClause("join Driver d on d.car.id = c.id").get(0);
    qa.mixinJoinIntoTree(join, new VariableEntityReference("Car", "c"), true);
    tree = qa.getTree();
    sources = (CommonTree) tree.getFirstChildWithType(JPA2Lexer.T_SOURCES);
    assertEquals(1, sources.getChildCount());
    SelectionSourceNode sourceNode = (SelectionSourceNode) sources.getChild(0);
    assertEquals(2, sourceNode.getChildCount());
    assertTrue(sourceNode.getChild(0) instanceof IdentificationVariableNode);
    assertTrue(sourceNode.getChild(1) instanceof JoinVariableNode);
    JoinVariableNode joinNode = (JoinVariableNode) sourceNode.getChild(1);
    TreeVisitor visitor = new TreeVisitor();
    TreeToQuery treeToQuery = new TreeToQuery();
    visitor.visit(joinNode, treeToQuery);
    assertEquals("d", joinNode.getVariableName());
    assertEquals("join Driver d on d.car.id = c.id", treeToQuery.getQueryString().trim());
}

Example 19 with TreeVisitor

use of org.antlr.runtime.tree.TreeVisitor in project antlr4 by tunnelvisionlabs.

the class GrammarTransformPipeline method setGrammarPtr.

/**
 * Utility visitor that sets grammar ptr in each node
 */
public static void setGrammarPtr(final Grammar g, GrammarAST tree) {
    if (tree == null)
        return;
    // ensure each node has pointer to surrounding grammar
    TreeVisitor v = new TreeVisitor(new GrammarASTAdaptor());
    v.visit(tree, new TreeVisitorAction() {

        @Override
        public Object pre(Object t) {
            ((GrammarAST) t).g = g;
            return t;
        }

        @Override
        public Object post(Object t) {
            return t;
        }
    });
}

Example 20 with TreeVisitor

use of org.antlr.runtime.tree.TreeVisitor in project flink by apache.

the class HiveParserBaseSemanticAnalyzer method validateNoHavingReferenceToAlias.

// We support having referring alias just as in hive's semantic analyzer. This check only prints
// a warning now.
public static void validateNoHavingReferenceToAlias(HiveParserQB qb, HiveParserASTNode havingExpr, HiveParserRowResolver inputRR, HiveParserSemanticAnalyzer semanticAnalyzer) throws SemanticException {
    HiveParserQBParseInfo qbPI = qb.getParseInfo();
    Map<HiveParserASTNode, String> exprToAlias = qbPI.getAllExprToColumnAlias();
    for (Map.Entry<HiveParserASTNode, String> exprAndAlias : exprToAlias.entrySet()) {
        final HiveParserASTNode expr = exprAndAlias.getKey();
        final String alias = exprAndAlias.getValue();
        // put the alias in input RR so that we can generate ExprNodeDesc with it
        if (inputRR.getExpression(expr) != null) {
            inputRR.put("", alias, inputRR.getExpression(expr));
        }
        final Set<Object> aliasReferences = new HashSet<>();
        TreeVisitorAction action = new TreeVisitorAction() {

            @Override
            public Object pre(Object t) {
                if (HiveASTParseDriver.ADAPTOR.getType(t) == HiveASTParser.TOK_TABLE_OR_COL) {
                    Object c = HiveASTParseDriver.ADAPTOR.getChild(t, 0);
                    if (c != null && HiveASTParseDriver.ADAPTOR.getType(c) == HiveASTParser.Identifier && HiveASTParseDriver.ADAPTOR.getText(c).equals(alias)) {
                        aliasReferences.add(t);
                    }
                }
                return t;
            }

            @Override
            public Object post(Object t) {
                return t;
            }
        };
        new TreeVisitor(HiveASTParseDriver.ADAPTOR).visit(havingExpr, action);
        if (aliasReferences.size() > 0) {
            String havingClause = semanticAnalyzer.ctx.getTokenRewriteStream().toString(havingExpr.getTokenStartIndex(), havingExpr.getTokenStopIndex());
            String msg = String.format("Encountered Select alias '%s' in having clause '%s'" + " This is non standard behavior.", alias, havingClause);
            LOG.warn(msg);
        }
    }
}