Examples with Tree org.antlr.v4.runtime.tree.Tree used on opensource projects

Example 71 with Tree

use of org.antlr.v4.runtime.tree.Tree in project hive by apache.

the class Exec method include.

/**
 * Execute statements from an include file
 */
void include(String content) throws Exception {
    InputStream input = new ByteArrayInputStream(content.getBytes("UTF-8"));
    HplsqlLexer lexer = new HplsqlLexer(new ANTLRInputStream(input));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    HplsqlParser parser = new HplsqlParser(tokens);
    ParseTree tree = parser.program();
    visit(tree);
}

Example 72 with Tree

use of org.antlr.v4.runtime.tree.Tree in project metron by apache.

the class WindowProcessor method syntaxTree.

/**
 * Create a textual representation of the syntax tree.  This is useful for those intrepid souls
 * who wish to extend the window selector language.  God speed.
 * @param statement
 * @return  A string representation of the syntax tree.
 */
public static String syntaxTree(String statement) {
    TokenStream tokens = createTokenStream(statement);
    if (tokens == null) {
        return null;
    }
    WindowParser parser = createParser(tokens, Optional.empty());
    ParseTree tree = parser.window();
    return GrammarUtils.toSyntaxTree(tree);
}

Example 73 with Tree

use of org.antlr.v4.runtime.tree.Tree in project grakn by graknlabs.

the class TemplateParser method parseGraqlTemplate.

private ParseTree parseGraqlTemplate(CommonTokenStream tokens, GraqlErrorListener errorListener) {
    GraqlTemplateParser parser = new GraqlTemplateParser(tokens);
    parser.setBuildParseTree(true);
    parser.removeErrorListeners();
    parser.addErrorListener(errorListener);
    ParseTree tree = parser.template();
    if (errorListener.hasErrors()) {
        throw GraqlSyntaxException.create(errorListener.toString());
    }
    return tree;
}

Example 74 with Tree

use of org.antlr.v4.runtime.tree.Tree in project drools by kiegroup.

the class FEELImpl method compile.

@Override
public CompiledExpression compile(String expression, CompilerContext ctx) {
    FEEL_1_1Parser parser = FEELParser.parse(getEventsManager(ctx.getListeners()), expression, ctx.getInputVariableTypes(), ctx.getInputVariables(), ctx.getFEELFunctions(), profiles);
    ParseTree tree = parser.compilation_unit();
    ASTBuilderVisitor v = new ASTBuilderVisitor(ctx.getInputVariableTypes());
    BaseNode expr = v.visit(tree);
    CompiledExpression ce = new CompiledExpressionImpl(expr);
    return ce;
}