public Label checkLabels(TextAnalyzer[] analyzers, String text) {
    Label currentLabel;
    for (TextAnalyzer analyzer : analyzers) {
        currentLabel = analyzer.processText(text);
        if (currentLabel != Label.OK) {
            return currentLabel;
        }
    }
    return Label.OK;
}

abstract class KeywordAnalyzer implements TextAnalyzer {
    abstract protected String[] getKeywords();
    abstract protected Label getLabel();

    @Override
    public Label processText(String text) {
        for (String keyword : getKeywords()) {
            if (text.contains(keyword)) {
                return getLabel();
            }
        }
        return Label.OK;
    }
}

class SpamAnalyzer extends KeywordAnalyzer {
    private String[] keywords;

    public SpamAnalyzer(String[] keywords) {
        this.keywords = keywords;
    }

    @Override
    protected String[] getKeywords() {
        return keywords;
    }

    @Override
    protected Label getLabel() {
        return Label.SPAM;
    }
}

class NegativeTextAnalyzer extends KeywordAnalyzer {
    private String[] keywords;

    public NegativeTextAnalyzer() {
        this.keywords = new String[]{":(", "=(", ":|"};
    }

    @Override
    protected String[] getKeywords() {
        return keywords;
    }

    @Override
    protected Label getLabel() {
        return Label.NEGATIVE_TEXT;
    }
}

class TooLongTextAnalyzer implements TextAnalyzer {
    private int maxLength;

    public TooLongTextAnalyzer(int maxLength) {
        this.maxLength = maxLength;
    }

    @Override
    public Label processText(String text) {
        if (text.length() > maxLength) {
            return Label.TOO_LONG;
        }
        return Label.OK;
    }
}