public void updateFindRule()

in src/main/java/org/apache/log4j/chainsaw/LogPanel.java [2440:2500]
55 lines of code
8 McCabe index (conditional complexity)

    public void updateFindRule(String ruleText) {
        if ((ruleText == null) || (ruleText.trim().equals(""))) {
            findRule = null;
            tableModel.updateEventsWithFindRule(null);
            colorizer.setFindRule(null);
            tableRuleMediator.setFindRule(null);
            searchRuleMediator.setFindRule(null);
            //reset background color in case we were previously an invalid expression
            findCombo.setBackground(UIManager.getColor("TextField.background"));
            findCombo.setToolTipText(
                "Enter an expression - right click or ctrl-space for menu - press enter to add to list");
            currentSearchMatchCount = 0;
            currentFindRuleText = null;
            statusBar.setSearchMatchCount(currentSearchMatchCount, getIdentifier());
            //if the preference to show search results is enabled, the find rule is now null - hide search results
            if (isSearchResultsVisible()) {
                hideSearchResults();
            }
        } else {
            //only turn off scrolltobottom when finding something (find not empty)
            preferenceModel.setScrollToBottom(false);
            if (ruleText.equals(currentFindRuleText)) {
                //don't update events if rule hasn't changed (we're finding next/previous)
                return;
            }
            currentFindRuleText = ruleText;
            try {
                final JTextField findText = (JTextField) findCombo.getEditor().getEditorComponent();
                findText.setToolTipText(
                    "Enter an expression - right click or ctrl-space for menu - press enter to add to list");
                findRule = ExpressionRule.getRule(ruleText);
                currentSearchMatchCount = tableModel.updateEventsWithFindRule(findRule);
                searchModel.updateEventsWithFindRule(findRule);
                colorizer.setFindRule(findRule);
                tableRuleMediator.setFindRule(findRule);
                searchRuleMediator.setFindRule(findRule);
                //valid expression, reset background color in case we were previously an invalid expression
                findText.setBackground(UIManager.getColor("TextField.background"));
                statusBar.setSearchMatchCount(currentSearchMatchCount, getIdentifier());
                if (isSearchResultsVisible()) {
                    showSearchResults();
                }
            } catch (IllegalArgumentException re) {
                findRule = null;
                final JTextField findText = (JTextField) findCombo.getEditor().getEditorComponent();
                findText.setToolTipText(re.getMessage());
                findText.setBackground(ChainsawConstants.INVALID_EXPRESSION_BACKGROUND);
                colorizer.setFindRule(null);
                tableRuleMediator.setFindRule(null);
                searchRuleMediator.setFindRule(null);
                tableModel.updateEventsWithFindRule(null);
                searchModel.updateEventsWithFindRule(null);
                currentSearchMatchCount = 0;
                statusBar.setSearchMatchCount(currentSearchMatchCount, getIdentifier());
                //if the preference to show search results is enabled, the find rule is now null - hide search results
                if (isSearchResultsVisible()) {
                    hideSearchResults();
                }
            }
        }
    }