// Test toString with special characters
        String name = "special[]param";
        String[] values = { "[value]", ",comma,", "quote\"test" };
        RequestParameter param = new RequestParameter(name, values);

        String expected = "[special[]param, [[value], ,comma,, quote\"test]]";
        assertEquals(expected, param.toString());
    }

    @Test
    public void test_immutability() {

	err = stmt.selectQProp.err
	if err != nil {
		err = errQueryAnalysisFailure(err)
	}

	// Set table alias
	stmt.tableAlias = selectAST.From.As
	// Remove quotes from column aliases
	if selectAST.Expression != nil {
		for _, exp := range selectAST.Expression.Expressions {
			if strings.HasSuffix(exp.As, "'") && strings.HasPrefix(exp.As, "'") && len(exp.As) >= 2 {

* Definir uma lógica compartilhada (mesmo formato de código repetidamente).
* Compartilhar conexões com banco de dados.
* Aplicar regras de segurança, autenticação, papéis de usuários, etc.
* E muitas outras coisas...

Tudo isso, enquanto minimizamos a repetição de código.

## Primeiros passos { #first-steps }

Vamos ver um exemplo simples. Tão simples que não será muito útil, por enquanto.

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexConfigIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_config"), name);
        }
        return indexName;
    }

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexConfigIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_config"), name);
        }
        return indexName;
    }

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexConfigIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_config"), name);
        }
        return indexName;
    }

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexConfigIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_config"), name);
        }
        return indexName;
    }

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexConfigIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_config"), name);
        }
        return indexName;
    }

h3,\nblockquote.quote-cyan h4,\nblockquote.quote-cyan h5,\nblockquote.quote-cyan h6 {\n  color: #17a2b8;\n}\n\nblockquote.quote-white {\n  border-color: #fff;\n}\n\nblockquote.quote-white h1,\nblockquote.quote-white h2,\nblockquote.quote-white h3,\nblockquote.quote-white h4,\nblockquote.quote-white h5,\nblockquote.quote-white h6 {\n  color: #fff;\n}\n\nblockquote.quote-gray {\n  border-color: #6c757d;\n}\n\nblockquote.quote-gray h1,\nblockquote.quote-gray h2,\nblockquote.quote-gray h3,\nblockquote.quote-gray h4...

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexLogIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_log"), name);
        }
        return indexName;
    }

    @Override
    protected LocalDateTime toLocalDateTime(final Object value) {
        if (value != null) {
            try {