Source code
package org.springframework.jdbc.core;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import org.jspecify.annotations.Nullable;
import org.springframework.jdbc.support.JdbcUtils;
/**
* Interface to be implemented for setting values for more complex database-specific
* types not supported by the standard {@code setObject} method. This is
* effectively an extended variant of {@link org.springframework.jdbc.support.SqlValue}.
*
* <p>Implementations perform the actual work of setting the actual values. They must
* implement the callback method {@code setTypeValue} which can throw SQLExceptions
* that will be caught and translated by the calling code. This callback method has
* access to the underlying Connection via the given PreparedStatement object, if that
* should be needed to create any database-specific objects.
*
* @author Thomas Risberg
* @author Juergen Hoeller
* @since 1.1
* @see java.sql.Types
* @see java.sql.PreparedStatement#setObject
* @see JdbcOperations#update(String, Object[], int[])
* @see org.springframework.jdbc.support.SqlValue
*/
public interface SqlTypeValue {
/**
* Constant that indicates an unknown (or unspecified) SQL type.
* Passed into {@code setTypeValue} if the original operation method
* does not specify an SQL type.
* @see java.sql.Types
* @see JdbcOperations#update(String, Object[])
*/
int TYPE_UNKNOWN = JdbcUtils.TYPE_UNKNOWN;
/**
* Set the type value on the given PreparedStatement.
* @param ps the PreparedStatement to work on
* @param paramIndex the index of the parameter for which we need to set the value
* @param sqlType the SQL type of the parameter we are setting
* @param typeName the type name of the parameter (optional)
* @throws SQLException if an SQLException is encountered while setting parameter values
* @see java.sql.Types
* @see java.sql.PreparedStatement#setObject
*/
void setTypeValue(PreparedStatement ps, int paramIndex, int sqlType, @Nullable String typeName)
throws SQLException;
}
Run 1
This code demonstrates excellent readability. The interface is well-structured with clear separation between documentation, constants, and the method signature. Javadoc comments are thorough and explain the purpose, parameters, and exceptions in detail. The method signature is concise yet descriptive, with clear parameter names (ps, paramIndex, sqlType, typeName) and proper use of @Nullable annotation. Nesting is minimal since this is a single interface declaration. The code follows Spring Framework conventions, making it familiar to experienced Java developers. While the Javadoc is comprehensive, it's not excessive for a public API. The single constant TYPE_UNKNOWN is well-documented. The code achieves strong clarity of intent - it clearly defines a callback interface for setting complex SQL type values. Overall, this is exemplary Java API code that balances thorough documentation with clean implementation.
Run 2
The code is highly readable. It has a clear structure as a single interface definition with well-organized Javadoc. Nesting is completely flat. Intent is explicitly documented in both class-level and method-level comments. The code is concise—only one method declaration and one constant. Action granularity is appropriate, with each parameter on its own line in the method signature for clarity. Reading flow is natural: imports, then interface documentation, constant, and method declaration. The only minor deductions are for slightly verbose Javadoc relative to the simplicity of the interface and the multi-line method signature, but these are acceptable for API documentation standards.
Run 3
The code is highly readable. It follows a logical structure typical of Spring interfaces, with a clear separation between Javadocs, a constant, and a method declaration. There is no actual nesting or implementation logic, so it is effectively flat and consists of a single, well-defined action. The intent is unambiguous: define a contract for setting custom SQL type values. It is concise and does not include unnecessary code. The method signature is clean, uses a nullable annotation appropriately, and the documentation is helpful without being excessive. Minor deductions only for slight verbosity in Javadocs, but otherwise this is an exemplary, clean interface.
Run 1
Code Structure: Clearly organized into imports, interface documentation, a constant, and a single method declaration. Nesting: Minimal, with only the interface scope. Clarity of intent: Descriptive naming and detailed Javadoc explain the database-specific parameter-setting callback, arguments, nullability, and exception contract. Code length: The implementation is concise; documentation is useful but slightly repetitive. Action granularity: Each declaration occupies its own logical unit, with no combined operations. Reading flow: Natural top-to-bottom progression and consistent formatting make the interface easy to scan. Minor drawbacks include the abbreviated parameter name 'ps', extra blank lines, and somewhat verbose documentation.
Run 2
Code Structure: The interface is logically organized into imports, interface documentation, a constant, and a single method contract. Nesting: There is no nested control flow, making the code easy to scan. Clarity of intent: Descriptive names, detailed Javadoc, and the nullable annotation clearly explain its database-specific parameter-setting purpose. Code length: The implementation is minimal; documentation is useful but slightly repetitive. Action granularity: Each declaration has a single responsibility, with no combined operations. Reading flow: The progression from interface purpose to constant and method is natural. Minor drawbacks include the abbreviated parameter name 'ps' and slightly excessive whitespace.
Run 3
Code Structure: A clean interface with imports, a constant, and one callback method in logical order. Nesting: Minimal, with no nested control flow. Clarity of intent: Descriptive interface and method names, parameter documentation, and the nullable annotation clearly communicate the contract; 'ps' is slightly abbreviated. Code length: The implementation is concise, although the extensive Javadoc contains some repetitive wording. Action granularity: Each declaration is separate, and the wrapped method signature remains easy to follow. Reading flow: Documentation leads naturally into each declaration, with consistent formatting and spacing; extra blank lines are a minor distraction.