Example usage for org.antlr.v4.runtime CommonTokenStream getText

Introduction

In this page you can find the example usage for org.antlr.v4.runtime CommonTokenStream getText.

Prototype

@Override
    public String getText(Interval interval) 

Source Link

Usage

From source file:com.espertech.esper.epl.parse.ASTExpressionDeclHelper.java

License:Open Source License

public static Pair<ExpressionDeclItem, ExpressionScriptProvided> walkExpressionDecl(
        EsperEPL2GrammarParser.ExpressionDeclContext ctx, List<String> scriptBodies,
        Map<Tree, ExprNode> astExprNodeMap, CommonTokenStream tokenStream) {

    String name = ctx.name.getText();

    if (ctx.alias != null) {
        if (!ctx.alias.getText().toLowerCase().trim().equals("alias")) {
            throw ASTWalkException.from("For expression alias '" + name
                    + "' expecting 'alias' keyword but received '" + ctx.alias.getText() + "'");
        }/*from w  ww  .  j a v a 2s. c o  m*/
        if (ctx.columnList() != null) {
            throw ASTWalkException.from("For expression alias '" + name
                    + "' expecting no parameters but received '" + tokenStream.getText(ctx.columnList()) + "'");
        }
        if (ctx.expressionDef() != null && ctx.expressionDef().expressionLambdaDecl() != null) {
            throw ASTWalkException.from("For expression alias '" + name
                    + "' expecting an expression without parameters but received '"
                    + tokenStream.getText(ctx.expressionDef().expressionLambdaDecl()) + "'");
        }
        if (ctx.expressionDef().stringconstant() != null) {
            throw ASTWalkException
                    .from("For expression alias '" + name + "' expecting an expression but received a script");
        }
        ExprNode node = ASTExprHelper.exprCollectSubNodes(ctx, 0, astExprNodeMap).get(0);
        String alias = ctx.name.getText();
        ExpressionDeclItem decl = new ExpressionDeclItem(alias, Collections.<String>emptyList(), node, true);
        return new Pair<ExpressionDeclItem, ExpressionScriptProvided>(decl, null);
    }

    if (ctx.expressionDef().stringconstant() != null) {
        String expressionText = scriptBodies.remove(0);
        List<String> parameters = ASTUtil.getIdentList(ctx.columnList());
        String optionalReturnType = ctx.classIdentifier() == null ? null
                : ASTUtil.unescapeClassIdent(ctx.classIdentifier());
        boolean optionalReturnTypeArray = ctx.array != null;
        String optionalDialect = ctx.expressionDialect() == null ? null : ctx.expressionDialect().d.getText();
        ExpressionScriptProvided script = new ExpressionScriptProvided(name, expressionText, parameters,
                optionalReturnType, optionalReturnTypeArray, optionalDialect);
        return new Pair<ExpressionDeclItem, ExpressionScriptProvided>(null, script);
    }

    EsperEPL2GrammarParser.ExpressionDefContext ctxexpr = ctx.expressionDef();
    ExprNode inner = ASTExprHelper.exprCollectSubNodes(ctxexpr.expression(), 0, astExprNodeMap).get(0);

    List<String> parametersNames = Collections.emptyList();
    EsperEPL2GrammarParser.ExpressionLambdaDeclContext lambdactx = ctxexpr.expressionLambdaDecl();
    if (ctxexpr.expressionLambdaDecl() != null) {
        parametersNames = ASTLibFunctionHelper.getLambdaGoesParams(lambdactx);
    }

    ExpressionDeclItem expr = new ExpressionDeclItem(name, parametersNames, inner, false);
    return new Pair<ExpressionDeclItem, ExpressionScriptProvided>(expr, null);
}

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From source file:com.espertech.esper.epl.parse.ASTWalkException.java

License:Open Source License

public static ASTWalkException from(String message, CommonTokenStream tokenStream, RuleContext parseTree) {
    return new ASTWalkException(message + " in text '" + tokenStream.getText(parseTree) + "'");
}

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