Package org.springframework.jdbc.core.namedparam

Class EmptySqlParameterSource

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 final 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

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 Details

INSTANCE

public static final EmptySqlParameterSource INSTANCE

A shared instance of EmptySqlParameterSource.

Constructor Details

EmptySqlParameterSource

public EmptySqlParameterSource()

Method Details

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)