dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/condition/ConditionStateRouter.java [122:157]:
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        } catch (ParseException e) {
            throw new IllegalStateException(e.getMessage(), e);
        }
    }

    private Map<String, ConditionMatcher> parseRule(String rule) throws ParseException {
        Map<String, ConditionMatcher> condition = new HashMap<>();
        if (StringUtils.isBlank(rule)) {
            return condition;
        }
        // Key-Value pair, stores both match and mismatch conditions
        ConditionMatcher matcherPair = null;
        // Multiple values
        Set<String> values = null;
        final Matcher matcher = ROUTE_PATTERN.matcher(rule);
        while (matcher.find()) { // Try to match one by one
            String separator = matcher.group(1);
            String content = matcher.group(2);
            // Start part of the condition expression.
            if (StringUtils.isEmpty(separator)) {
                matcherPair = this.getMatcher(content);
                condition.put(content, matcherPair);
            }
            // The KV part of the condition expression
            else if ("&".equals(separator)) {
                if (condition.get(content) == null) {
                    matcherPair = this.getMatcher(content);
                    condition.put(content, matcherPair);
                } else {
                    matcherPair = condition.get(content);
                }
            }
            // The Value in the KV part.
            else if ("=".equals(separator)) {
                if (matcherPair == null) {
                    throw new ParseException(
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dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/condition/MultiDestConditionRouter.java [96:131]:
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        } catch (ParseException e) {
            throw new IllegalStateException(e.getMessage(), e);
        }
    }

    private Map<String, ConditionMatcher> parseRule(String rule) throws ParseException {
        Map<String, ConditionMatcher> condition = new HashMap<>();
        if (StringUtils.isBlank(rule)) {
            return condition;
        }
        // Key-Value pair, stores both match and mismatch conditions
        ConditionMatcher matcherPair = null;
        // Multiple values
        Set<String> values = null;
        final Matcher matcher = ROUTE_PATTERN.matcher(rule);
        while (matcher.find()) { // Try to match one by one
            String separator = matcher.group(1);
            String content = matcher.group(2);
            // Start part of the condition expression.
            if (StringUtils.isEmpty(separator)) {
                matcherPair = this.getMatcher(content);
                condition.put(content, matcherPair);
            }
            // The KV part of the condition expression
            else if ("&".equals(separator)) {
                if (condition.get(content) == null) {
                    matcherPair = this.getMatcher(content);
                    condition.put(content, matcherPair);
                } else {
                    matcherPair = condition.get(content);
                }
            }
            // The Value in the KV part.
            else if ("=".equals(separator)) {
                if (matcherPair == null) {
                    throw new ParseException(
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