# General - How To - Recipes { #general-how-to-recipes }

Here are several pointers to other places in the docs, for general or frequent questions.

## Filter Data - Security { #filter-data-security }

To ensure that you don't return more data than you should, read the docs for [Tutorial - Response Model - Return Type](../tutorial/response-model.md){.internal-link target=_blank}.

## Documentation Tags - OpenAPI { #documentation-tags-openapi }

        if (StringUtil.isBlank(value)) {
            return StringUtil.EMPTY_STRINGS;
        }
        return split(value, ",").get(stream -> stream.filter(StringUtil::isNotBlank).map(String::trim).toArray(n -> new String[n]));
    }

    /**
     * Gets the default roles as an array.
     *
     * @return the default roles
     */

      "number_of_replicas": 0,
      "auto_expand_replicas": "0-1"
    },
    "analysis": {
      "analyzer": {
        "standard_analyzer": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "cjk_width",
            "asciifolding",
            "lowercase",
            "stop",
            "stemmer"
          ]
        }
      }
    }
  }

}

// readDirFn applies the fn() function on each entries at dirPath, doesn't recurse into
// the directory itself, if the dirPath doesn't exist this function doesn't return
// an error.
func readDirFn(dirPath string, filter func(name string, typ os.FileMode) error) error {
	d, err := Open(dirPath)
	if err != nil {
		if osErrToFileErr(err) == errFileNotFound {
			return nil
		}
		return osErrToFileErr(err)
	}
	defer d.Close()

     *
     * If strict resource lifecycle is used, make sure you close the individual files after use.
     *
     * @param filter
     *            a file filter to exclude files from the results
     * @return An array of {@code SmbResource} objects
     * @throws SmbException if an error occurs while listing the files
     */
    public SmbFile[] listFiles(final SmbFileFilter filter) throws SmbException {

            }
            return new SpnegoCredential(username[0]);
        }).orElseGet(() -> null);

    }

    /**
     * SPNEGO filter configuration implementation.
     *
     * This inner class provides configuration parameters for the SPNEGO filter,
     * mapping system properties to SPNEGO configuration values. It handles
     * various authentication settings including Kerberos configuration,

        // Test relative path resolution
        URL relativeUrl = new URL(baseUrl, "folder/file.txt");
        assertEquals("smb", relativeUrl.getProtocol());
        assertEquals("server", relativeUrl.getHost());
        assertEquals("/share/folder/file.txt", relativeUrl.getPath());

        // Test parent directory navigation
        URL parentUrl = new URL(baseUrl, "../other/file.txt");

                .filter(StringUtil::isNotBlank)
                .distinct()
                .collect(Collectors.joining("\n")));
        body.virtualHosts = stream(entity.getVirtualHosts())
                .get(stream -> stream.filter(StringUtil::isNotBlank).distinct().map(String::trim).collect(Collectors.joining("\n")));
        return body;
    }

        bool((must, should, mustNot, filter) -> {
            filteredLambda.callback(must, filter);
        }, opLambda);
    }

    public void not(OperatorCall<RoleCQ> notLambda) {
        not(notLambda, null);
    }

    public void not(final OperatorCall<RoleCQ> notLambda, final ConditionOptionCall<BoolQueryBuilder> opLambda) {
        bool((must, should, mustNot, filter) -> notLambda.callback(mustNot), opLambda);
    }

    public interface BoolCall<CQ extends EsAbstractConditionQuery> {

        void callback(CQ must, CQ should, CQ mustNot, CQ filter);
    }

    @FunctionalInterface
    public interface FilteredCall<CQ extends EsAbstractConditionQuery, CF extends EsAbstractConditionQuery> {

        void callback(CQ query, CF filter);
    }

    @FunctionalInterface
    public interface OperatorCall<CQ extends EsAbstractConditionQuery> {