SqlParameterSource (Spring Framework 4.3.30.RELEASE API)

All Known Implementing Classes:
AbstractSqlParameterSource, BeanPropertySqlParameterSource, EmptySqlParameterSource, MapSqlParameterSource
```
public interface SqlParameterSource
```
Interface that defines common functionality for objects that can offer parameter values for named SQL parameters, serving as argument for NamedParameterJdbcTemplate operations.
This interface allows for the specification of SQL type in addition to parameter values. All parameter values and types are identified by specifying the name of the parameter.
Intended to wrap various implementations like a Map or a JavaBean with a consistent interface.
Since:
2.0
Author:
Thomas Risberg, Juergen Hoeller
See Also:
NamedParameterJdbcOperations, NamedParameterJdbcTemplate, MapSqlParameterSource, BeanPropertySqlParameterSource

Field Summary
Fields
Modifier and Type Field Description
static int TYPE_UNKNOWN
Constant that indicates an unknown (or unspecified) SQL type.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getSqlType(String paramName)`	Determine the SQL type for the specified named parameter.
`String`	`getTypeName(String paramName)`	Determine the type name for the specified named parameter.
`Object`	`getValue(String paramName)`	Return the parameter value for the requested named parameter.
`boolean`	`hasValue(String paramName)`	Determine whether there is a value for the specified named parameter.

- Field Detail
  - TYPE_UNKNOWN
```
static final int TYPE_UNKNOWN
```
    Constant that indicates an unknown (or unspecified) SQL type. To be returned from getType when no specific SQL type known.
    See Also:
    getSqlType(java.lang.String), Types, Constant Field Values
- Method Detail
  - hasValue
```
boolean hasValue(String paramName)
```
    Determine whether there is a value for the specified named parameter.
    Parameters:
    paramName - the name of the parameter
    Returns:
    whether there is a value defined
  - getValue
```
Object getValue(String paramName)
         throws IllegalArgumentException
```
    Return the parameter value for the requested named parameter.
    Parameters:
    paramName - the name of the parameter
    Returns:
    the value of the specified parameter
    Throws:
    IllegalArgumentException - if there is no value for the requested parameter
  - getSqlType
```
int getSqlType(String paramName)
```
    Determine the SQL type for the specified named parameter.
    Parameters:
    paramName - the name of the parameter
    Returns:
    the SQL type of the specified parameter, or TYPE_UNKNOWN if not known
    See Also:
    TYPE_UNKNOWN
  - getTypeName
```
String getTypeName(String paramName)
```
    Determine the type name for the specified named parameter.
    Parameters:
    paramName - the name of the parameter
    Returns:
    the type name of the specified parameter, or null if not known