Extension.java 文件源码

/**
 * Return the value for the field with a given name and type.
 * 
 * @param field
 *        The name of the field to retrieve the value of.
 * @param extensionFieldType
 *        The type of the field.
 * @return The value for the field with the given name.
 * @throws NoSuchElementException
 *         if this schema does not contain a field of the given name.
 * @throws IllegalArgumentException
 *         if the given field is null or an empty string or if the extensionFieldType is null.
 */
@JsonAnyGetter
public <T> T getField(String field, ExtensionFieldType<T> extensionFieldType) {
    if (field == null || field.isEmpty()) {
        throw new IllegalArgumentException("Invalid field name");
    }
    if (extensionFieldType == null) {
        throw new IllegalArgumentException("Invalid field type");
    }

    if (!isFieldPresent(field)) {
        throw new NoSuchElementException("Field " + field + " not valid in this extension");
    }

    return extensionFieldType.fromString(fields.get(field).value);
}