# JSON Compatible Encoder { #json-compatible-encoder }

There are some cases where you might need to convert a data type (like a Pydantic model) to something compatible with JSON (like a `dict`, `list`, etc).

For example, if you need to store it in a database.

For that, **FastAPI** provides a `jsonable_encoder()` function.

## Using the `jsonable_encoder` { #using-the-jsonable-encoder }

import org.codelibs.core.collection.CaseInsensitiveMap;
import org.codelibs.core.convert.ByteConversionUtil;
import org.codelibs.core.convert.DoubleConversionUtil;
import org.codelibs.core.convert.FloatConversionUtil;
import org.codelibs.core.convert.IntegerConversionUtil;
import org.codelibs.core.convert.LongConversionUtil;
import org.codelibs.core.convert.ShortConversionUtil;
import org.codelibs.core.exception.BeanFieldSetAccessibleFailureException;

import jcifs.BaseTest;

/**
 * Test class for Hexdump utility functionality
 */
@DisplayName("Hexdump Utility Tests")
class HexdumpTest extends BaseTest {

    @Test
    @DisplayName("Should convert byte array to hex string")
    void testToHexString() {
        // Given
        byte[] data = { 0x00, 0x0F, (byte) 0xFF, 0x7F, (byte) 0x80 };

        // When
        String result = Hexdump.toHexString(data);

    assertThat(UPPER_UNDERSCORE.converterTo(UPPER_CAMEL).convert("FOO_BAR")).isEqualTo("FooBar");
    assertThat(UPPER_UNDERSCORE.converterTo(LOWER_CAMEL).convert("FOO_BAR")).isEqualTo("fooBar");
    assertThat(UPPER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("FooBar")).isEqualTo("FOO_BAR");
    assertThat(LOWER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("fooBar")).isEqualTo("FOO_BAR");
  }

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.convert;

import static org.codelibs.core.convert.TimeConversionUtil.toCalendar;
import static org.codelibs.core.convert.TimeConversionUtil.toDate;
import static org.codelibs.core.convert.TimeConversionUtil.toPlainPattern;
import static org.codelibs.core.convert.TimeConversionUtil.toSqlTime;
import static org.hamcrest.CoreMatchers.is;

        final char[] c = new char[size];
        toHexChars(val, c, 0, size);
        return new String(c);
    }

    /**
     * Converts a long value to a hexadecimal string representation with specified padding.
     *
     * @param val the long value to convert to hexadecimal
     * @param size the desired length of the resulting hex string (will be left-padded with zeros)

        }

        return convertObj(value, clazz);
    }

    /**
     * Converts an object to the specified type.
     * Supports conversion to String, Date, Long, Integer, Double, Float, and Boolean types.
     *
     * @param <T> the type to convert the value to
     * @param value the value to convert
     * @param clazz the target class type

        return FuzzyQuery.class.getSimpleName();
    }

    /**
     * Executes the fuzzy query command to convert a Lucene FuzzyQuery into an OpenSearch QueryBuilder.
     *
     * @param context the query context containing search configuration
     * @param query the Lucene query to convert (must be a FuzzyQuery)
     * @param boost the boost factor to apply to the query
     * @return OpenSearch QueryBuilder for fuzzy matching

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.convert;

import static org.codelibs.core.convert.TimestampConversionUtil.toCalendar;
import static org.codelibs.core.convert.TimestampConversionUtil.toDate;
import static org.codelibs.core.convert.TimestampConversionUtil.toPlainPattern;
import static org.codelibs.core.convert.TimestampConversionUtil.toSqlTimestamp;
import static org.hamcrest.CoreMatchers.is;

            }
        }
        return defaultValue;
    }

    /**
     * Converts an object to the specified class type.
     * @param <T> The target type.
     * @param value The object to convert.
     * @param clazz The class type to convert to.
     * @return The converted object.
     */
    @SuppressWarnings("unchecked")