Package org.antlr.runtime

Examples of org.antlr.runtime.CharStream

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        return false;
    }

    private RuleReturnScope parseTable(String sql) throws SqlJetException {
        try {
            CharStream chars = new ANTLRStringStream(sql);
            SqlLexer lexer = new SqlLexer(chars);
            CommonTokenStream tokens = new CommonTokenStream(lexer);
            SqlParser parser = new SqlParser(tokens);
            return parser.schema_create_table_stmt();
        } catch (RecognitionException re) {
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        }
    }

    private RuleReturnScope parseView(String sql) throws SqlJetException {
        try {
            CharStream chars = new ANTLRStringStream(sql);
            SqlLexer lexer = new SqlLexer(chars);
            CommonTokenStream tokens = new CommonTokenStream(lexer);
            SqlParser parser = new SqlParser(tokens);
            return parser.create_view_stmt();
        } catch (RecognitionException re) {
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        }
    }

    private RuleReturnScope parseTrigger(String sql) throws SqlJetException {
        try {
            CharStream chars = new ANTLRStringStream(sql);
            SqlLexer lexer = new SqlLexer(chars);
            CommonTokenStream tokens = new CommonTokenStream(lexer);
            SqlParser parser = new SqlParser(tokens);
            return parser.create_trigger_stmt();
        } catch (RecognitionException re) {
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        }
    }

    private ParserRuleReturnScope parseIndex(String sql) throws SqlJetException {
        try {
            CharStream chars = new ANTLRStringStream(sql);
            SqlLexer lexer = new SqlLexer(chars);
            CommonTokenStream tokens = new CommonTokenStream(lexer);
            SqlParser parser = new SqlParser(tokens);
            return parser.create_index_stmt();
        } catch (RecognitionException re) {
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    }

    private String getCoreSQL(RuleReturnScope parsedSQL) {
        final CommonTree ast = (CommonTree) parsedSQL.getTree();
        final CommonToken nameToken = (CommonToken) ((CommonTree) ast.getChild(1)).getToken();
        final CharStream inputStream = nameToken.getInputStream();
        final CommonToken stopToken = (CommonToken) parsedSQL.getStop();
        return inputStream.substring(nameToken.getStartIndex(), stopToken.getStopIndex());
    }
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    private String getAlterTableName(SqlJetAlterTableDef alterTableDef) {
        final ParserRuleReturnScope parsedSql = alterTableDef.getParsedSql();
        final CommonTree ast = (CommonTree) parsedSql.getTree();
        final CommonToken stopToken = (CommonToken) parsedSql.getStop();
        final CommonToken nameToken = (CommonToken) ((CommonTree) ast.getChild(ast.getChildCount() - 1)).getToken();
        final CharStream inputStream = nameToken.getInputStream();
        return inputStream.substring(nameToken.getStartIndex(), stopToken.getStopIndex());
    }
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    private String getTableAlteredSql(String sql, SqlJetAlterTableDef alterTableDef) throws SqlJetException {

        final RuleReturnScope parsedSQL = parseTable(sql);
        final CommonTree ast = (CommonTree) parsedSQL.getTree();
        final CommonToken nameToken = (CommonToken) ((CommonTree) ast.getChild(1)).getToken();
        final CharStream inputStream = nameToken.getInputStream();
        final CommonToken stopToken = (CommonToken) parsedSQL.getStop();

        final StringBuilder b = new StringBuilder();

        if (alterTableDef.getNewTableName() != null) {
            b.append(inputStream.substring(0, nameToken.getStartIndex() - 1));
            b.append(getAlterTableName(alterTableDef));
            b.append(inputStream.substring(nameToken.getStopIndex() + 1, stopToken.getStopIndex()));
        } else if (alterTableDef.getNewColumnDef() != null) {
            b.append(inputStream.substring(0, stopToken.getStartIndex() - 1));
            b.append(",").append(getAlterTableName(alterTableDef));
            b.append(inputStream.substring(stopToken.getStartIndex(), stopToken.getStopIndex()));
        } else {
            throw new SqlJetException("Wrong ALTER TABLE statement");
        }

        return b.toString();
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     */
    private String getAlteredIndexSql(String sql, String alterTableName) throws SqlJetException {
        final RuleReturnScope parsedSQL = parseIndex(sql);
        final CommonTree ast = (CommonTree) parsedSQL.getTree();
        final CommonToken nameToken = (CommonToken) ((CommonTree) ast.getChild(2)).getToken();
        final CharStream inputStream = nameToken.getInputStream();
        final CommonToken stopToken = (CommonToken) parsedSQL.getStop();
        final StringBuilder b = new StringBuilder();
        b.append(inputStream.substring(0, nameToken.getStartIndex() - 1));
        b.append(alterTableName);
        b.append(inputStream.substring(nameToken.getStopIndex() + 1, stopToken.getStopIndex()));
        return b.toString();
    }
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        return b.toString();
    }

    private ParserRuleReturnScope parseSqlStatement(String sql) throws SqlJetException {
        try {
            CharStream chars = new ANTLRStringStream(sql);
            SqlLexer lexer = new SqlLexer(chars);
            CommonTokenStream tokens = new CommonTokenStream(lexer);
            SqlParser parser = new SqlParser(tokens);
            return parser.sql_stmt_itself();
        } catch (RecognitionException re) {
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        }
        return false;
    }

    private CommonTree parse() throws SqlJetException, RecognitionException {
        CharStream chars = new ANTLRStringStream(sql);
        SqlLexer lexer = new SqlLexer(chars);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        SqlParser parser = new SqlParser(tokens);
        return (CommonTree) parser.sql_stmt().getTree();
    }
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