java.lang.Object
- org.springframework.jdbc.core.namedparam.EmptySqlParameterSource

All Implemented Interfaces:
SqlParameterSource
```
public class EmptySqlParameterSource
extends Object
implements SqlParameterSource
```
A simple empty implementation of the SqlParameterSource interface.
Since:
3.2.2
Author:
Juergen Hoeller

Field Summary
Fields
Modifier and Type Field Description
static EmptySqlParameterSource INSTANCE
A shared instance of EmptySqlParameterSource.
- Fields inherited from interface org.springframework.jdbc.core.namedparam.SqlParameterSource
  TYPE_UNKNOWN

Constructor Summary
Constructors
Constructor Description
EmptySqlParameterSource()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String[]`	`getParameterNames()`	Enumerate all available parameter names if possible.
`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.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - INSTANCE
```
public static final EmptySqlParameterSource INSTANCE
```
    A shared instance of EmptySqlParameterSource.
- Constructor Detail
  - EmptySqlParameterSource
```
public EmptySqlParameterSource()
```
- Method Detail
  - hasValue
```
public boolean hasValue(String paramName)
```
    Description copied from interface: SqlParameterSource
    Determine whether there is a value for the specified named parameter.
    Specified by:
    hasValue in interface SqlParameterSource
    Parameters:
    paramName - the name of the parameter
    Returns:
    whether there is a value defined
  - getValue
```
@Nullable
public Object getValue(String paramName)
                throws IllegalArgumentException
```
    Description copied from interface: SqlParameterSource
    Return the parameter value for the requested named parameter.
    Specified by:
    getValue in interface SqlParameterSource
    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
```
public int getSqlType(String paramName)
```
    Description copied from interface: SqlParameterSource
    Determine the SQL type for the specified named parameter.
    Specified by:
    getSqlType in interface SqlParameterSource
    Parameters:
    paramName - the name of the parameter
    Returns:
    the SQL type of the specified parameter, or TYPE_UNKNOWN if not known
    See Also:
    SqlParameterSource.TYPE_UNKNOWN
  - getTypeName
```
@Nullable
public String getTypeName(String paramName)
```
    Description copied from interface: SqlParameterSource
    Determine the type name for the specified named parameter.
    Specified by:
    getTypeName in interface SqlParameterSource
    Parameters:
    paramName - the name of the parameter
    Returns:
    the type name of the specified parameter, or null if not known
  - getParameterNames
```
@Nullable
public String[] getParameterNames()
```
    Description copied from interface: SqlParameterSource
    Enumerate all available parameter names if possible.
    This is an optional operation, primarily for use with SimpleJdbcInsert and SimpleJdbcCall.
    Specified by:
    getParameterNames in interface SqlParameterSource
    Returns:
    the array of parameter names, or null if not determinable
    See Also:
    SqlParameterSourceUtils.extractCaseInsensitiveParameterNames(org.springframework.jdbc.core.namedparam.SqlParameterSource)

Class EmptySqlParameterSource

Field Summary

Fields inherited from interface org.springframework.jdbc.core.namedparam.SqlParameterSource

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

INSTANCE

Constructor Detail

EmptySqlParameterSource

Method Detail

hasValue

getValue

getSqlType

getTypeName

getParameterNames