connectors/rocketmq-connect-doris/src/main/java/org/apache/rocketmq/connect/doris/util/IdentifierRules.java [58:184]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    public IdentifierRules(
            String delimiter,
            String quoteString
    ) {
        this(delimiter, quoteString, quoteString);
    }

    /**
     * Create new identifier rules using the supplied parameters.
     *
     * @param identifierDelimiter the delimiter used within fully qualified names; may be null if
     *                            {@link #DEFAULT_ID_DELIM} is to be used
     * @param leadingQuoteString  the string used for leading quotes; may be null if {@link
     *                            #DEFAULT_QUOTE} is to be used
     * @param trailingQuoteString the string used for leading quotes; may be null if {@link
     *                            #DEFAULT_QUOTE} is to be used
     */
    public IdentifierRules(
            String identifierDelimiter,
            String leadingQuoteString,
            String trailingQuoteString
    ) {
        this.leadingQuoteString = leadingQuoteString != null ? leadingQuoteString : DEFAULT_QUOTE;
        this.trailingQuoteString = trailingQuoteString != null ? trailingQuoteString : DEFAULT_QUOTE;
        this.identifierDelimiter = identifierDelimiter != null ? identifierDelimiter : DEFAULT_ID_DELIM;
    }

    /**
     * Get the delimiter that is used to delineate segments within fully-qualified identifiers.
     *
     * @return the identifier delimiter; never null
     */
    public String identifierDelimiter() {
        return identifierDelimiter;
    }

    /**
     * Get the string used as a leading quote.
     *
     * @return the leading quote string; never null
     */
    public String leadingQuoteString() {
        return leadingQuoteString;
    }

    /**
     * Get the string used as a trailing quote.
     *
     * @return the trailing quote string; never null
     */
    public String trailingQuoteString() {
        return trailingQuoteString;
    }

    /**
     * Get an expression builder that uses these identifier rules.
     *
     * @return the new expression builder; never null
     */
    public ExpressionBuilder expressionBuilder() {
        return new ExpressionBuilder(this);
    }

    /**
     * Parse the unqualified or fully qualified name into its segments.
     *
     * @param fqn the unqualified or fully-qualified name; may not be null
     * @return the segments in the supplied name; never null, but possibly empty
     */
    public List<String> parseQualifiedIdentifier(String fqn) {
        String orig = fqn;
        String delim = identifierDelimiter();
        String lead = leadingQuoteString();
        String trail = trailingQuoteString();
        List<String> parts = new ArrayList<>();
        int index;
        String segment;
        do {
            if (!lead.equals(UNSUPPORTED_QUOTE) && fqn.startsWith(lead)) {
                int end = fqn.indexOf(trail, lead.length());
                if (end < 0) {
                    throw new IllegalArgumentException(
                            "Failure parsing fully qualified identifier; missing trailing quote in " + orig);
                }
                segment = fqn.substring(lead.length(), end);
                fqn = fqn.substring(end + trail.length());
                if (fqn.startsWith(delim)) {
                    fqn = fqn.substring(delim.length());
                    if (fqn.isEmpty()) {
                        throw new IllegalArgumentException(
                                "Failure parsing fully qualified identifier; ends in delimiter " + orig);
                    }
                }
            } else {
                index = fqn.indexOf(delim, 0);
                if (index == -1) {
                    segment = fqn;
                    fqn = "";
                } else {
                    segment = fqn.substring(0, index);
                    fqn = fqn.substring(index + delim.length());
                    if (fqn.isEmpty()) {
                        throw new IllegalArgumentException(
                                "Failure parsing fully qualified identifier; ends in delimiter " + orig);
                    }
                }
            }
            parts.add(segment);
        } while (fqn.length() > 0);
        return parts;
    }

    /**
     * Return a new IdentifierRules that escapes quotes with the specified prefix.
     *
     * @param prefix the prefix
     * @return the new IdentifierRules, or this builder if the prefix is null or empty
     */
    public IdentifierRules escapeQuotesWith(String prefix) {
        if (prefix == null || prefix.isEmpty()) {
            return this;
        }
        return new IdentifierRules(
                identifierDelimiter,
                prefix + leadingQuoteString,
                prefix + trailingQuoteString
        );
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



connectors/rocketmq-connect-jdbc/src/main/java/org/apache/rocketmq/connect/jdbc/util/IdentifierRules.java [38:137]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    public IdentifierRules(
            String delimiter,
            String quoteString
    ) {
        this(delimiter, quoteString, quoteString);
    }

    public IdentifierRules(
            String identifierDelimiter,
            String leadingQuoteString,
            String trailingQuoteString
    ) {
        this.leadingQuoteString = leadingQuoteString != null ? leadingQuoteString : DEFAULT_QUOTE;
        this.trailingQuoteString = trailingQuoteString != null ? trailingQuoteString : DEFAULT_QUOTE;
        this.identifierDelimiter = identifierDelimiter != null ? identifierDelimiter : DEFAULT_ID_DELIM;
    }

    /**
     * Get the delimiter that is used to delineate segments within fully-qualified identifiers.
     *
     * @return the identifier delimiter; never null
     */
    public String identifierDelimiter() {
        return identifierDelimiter;
    }

    /**
     * Get the string used as a leading quote.
     *
     * @return the leading quote string; never null
     */
    public String leadingQuoteString() {
        return leadingQuoteString;
    }

    /**
     * Get the string used as a trailing quote.
     *
     * @return the trailing quote string; never null
     */
    public String trailingQuoteString() {
        return trailingQuoteString;
    }

    public ExpressionBuilder expressionBuilder() {
        return new ExpressionBuilder(this);
    }

    public List<String> parseQualifiedIdentifier(String fqn) {
        String orig = fqn;
        String delim = identifierDelimiter();
        String lead = leadingQuoteString();
        String trail = trailingQuoteString();
        List<String> parts = new ArrayList<>();
        int index;
        String segment;
        do {
            if (!lead.equals(UNSUPPORTED_QUOTE) && fqn.startsWith(lead)) {
                int end = fqn.indexOf(trail, lead.length());
                if (end < 0) {
                    throw new IllegalArgumentException(
                            "Failure parsing fully qualified identifier; missing trailing quote in " + orig);
                }
                segment = fqn.substring(lead.length(), end);
                fqn = fqn.substring(end + trail.length());
                if (fqn.startsWith(delim)) {
                    fqn = fqn.substring(delim.length());
                    if (fqn.isEmpty()) {
                        throw new IllegalArgumentException(
                                "Failure parsing fully qualified identifier; ends in delimiter " + orig);
                    }
                }
            } else {
                index = fqn.indexOf(delim, 0);
                if (index == -1) {
                    segment = fqn;
                    fqn = "";
                } else {
                    segment = fqn.substring(0, index);
                    fqn = fqn.substring(index + delim.length());
                    if (fqn.isEmpty()) {
                        throw new IllegalArgumentException(
                                "Failure parsing fully qualified identifier; ends in delimiter " + orig);
                    }
                }
            }
            parts.add(segment);
        } while (fqn.length() > 0);
        return parts;
    }

    public IdentifierRules escapeQuotesWith(String prefix) {
        if (prefix == null || prefix.isEmpty()) {
            return this;
        }
        return new IdentifierRules(
                identifierDelimiter,
                prefix + leadingQuoteString,
                prefix + trailingQuoteString
        );
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -