// The third parameter is the size of the output string in characters
        // size = number of hex characters to output
        // Each byte produces 2 hex characters

        // Test basic conversion (srcIndex is ignored in the implementation)
        byte[] data1 = { 0x00, 0x01, 0x02, 0x03 };
        assertEquals("00", Hexdump.toHexString(data1, 0, 2)); // 2 chars = 1 byte

/// check

Also notice that **FastAPI** is smart enough to notice that the path parameter `item_id` is a path parameter and `q` is not, so, it's a query parameter.

///

## Query parameter type conversion { #query-parameter-type-conversion }

You can also declare `bool` types, and they will be converted:

{* ../../docs_src/query_params/tutorial003_py310.py hl[7] *}

In this case, if you go to:

```

 * characters to their Alphabet equivalents, handling both single and double Katakana character combinations.
 * </p>
 *
 * <p>
 * The conversion process involves iterating through the input string, identifying Katakana characters,
 * and replacing them with their corresponding Alphabet representations based on the internal mapping.

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.searchlist;

import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

/**
 * The edit form for Search List.
 * This form extends CreateForm and adds fields necessary for editing existing search list entries.
 */
public class EditForm extends CreateForm {

import org.codelibs.fess.app.web.CrudMode;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.validation.CustomSize;
import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Pattern;
import jakarta.validation.constraints.Size;

/**
 * Form class for creating access tokens in the admin interface.

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.crawlinginfo;

import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * Form class for editing crawling information in the admin interface.
 * This form handles the editing of crawling session data, which tracks

 * the conversion uses their millisecond value to create the target object.
 * For other types, the conversion uses the string representation of the source object.
 * </p>
 * <p>
 * If no pattern is specified, the pattern used for conversion depends on the locale as follows:
 * </p>
 * <table border="1">
 * <caption>Conversion Patterns</caption>
 * <tr>
 * <th>Category</th>

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.core.beans;

/**
 * This interface performs conversion between strings and objects.
 *
 * @author higa
 */
public interface Converter {

    /**
     * Returns the value as a string.
     *
     * @param value
     *            the value

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.searchlist;

import org.codelibs.fess.app.web.admin.searchlist.ListForm;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

/**
 * Search request body for search list administration API.
 */
public class SearchBody extends ListForm {

    /**
     * Default constructor.
     */
    public SearchBody() {

 */
package org.codelibs.fess.app.web.admin.searchlist;

import java.util.Map;

import org.codelibs.fess.app.web.CrudMode;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

/**
 * The create form for Search List.
 *
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {
    }