Package org.h2.jdbc

Class JdbcParameterMetaData

java.lang.Object

org.h2.message.TraceObject

org.h2.jdbc.JdbcParameterMetaData

All Implemented Interfaces:

java.sql.ParameterMetaData, java.sql.Wrapper

public final class JdbcParameterMetaData
extends TraceObject
implements java.sql.ParameterMetaData

Information about the parameters of a prepared statement.

Field Summary

Fields

Modifier and Type	Field	Description
private int	paramCount
private java.util.ArrayList<? extends ParameterInterface>	parameters
private JdbcPreparedStatement	prep

Fields inherited from class org.h2.message.TraceObject

ARRAY, BLOB, CALLABLE_STATEMENT, CLOB, CONNECTION, DATA_SOURCE, DATABASE_META_DATA, PARAMETER_META_DATA, PREPARED_STATEMENT, RESULT_SET, RESULT_SET_META_DATA, SAVEPOINT, SQLXML, STATEMENT, trace, XA_DATA_SOURCE, XID

Fields inherited from interface java.sql.ParameterMetaData

parameterModeIn, parameterModeInOut, parameterModeOut, parameterModeUnknown, parameterNoNulls, parameterNullable, parameterNullableUnknown

Constructor Summary

Constructors

Constructor	Description
JdbcParameterMetaData(Trace trace, JdbcPreparedStatement prep, CommandInterface command, int id)

Method Summary

Modifier and Type	Method	Description
private void	checkClosed()
private ParameterInterface	getParameter(int param)
java.lang.String	getParameterClassName(int param)	Returns the Java class name of the parameter.
int	getParameterCount()	Returns the number of parameters.
int	getParameterMode(int param)	Returns the parameter mode.
int	getParameterType(int param)	Returns the parameter type.
java.lang.String	getParameterTypeName(int param)	Returns the parameter type name.
int	getPrecision(int param)	Returns the parameter precision.
int	getScale(int param)	Returns the parameter scale.
int	isNullable(int param)	Checks if this is nullable parameter.
boolean	isSigned(int param)	Checks if this parameter is signed.
boolean	isWrapperFor(java.lang.Class<?> iface)	Checks if unwrap can return an object of this class.
java.lang.String	toString()	INTERNAL
<T> T	unwrap(java.lang.Class<T> iface)	Return an object of this class if possible.

Methods inherited from class org.h2.message.TraceObject

debugCode, debugCodeAssign, debugCodeCall, debugCodeCall, debugCodeCall, getNextId, getTraceId, getTraceObjectName, isDebugEnabled, isInfoEnabled, logAndConvert, quote, quoteArray, quoteBigDecimal, quoteBytes, quoteDate, quoteIntArray, quoteMap, quoteTime, quoteTimestamp, setTrace, unsupported

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

prep

private final JdbcPreparedStatement prep

paramCount

private final int paramCount

parameters

private final java.util.ArrayList<? extends ParameterInterface> parameters

Constructor Detail

JdbcParameterMetaData

JdbcParameterMetaData(Trace trace,
                      JdbcPreparedStatement prep,
                      CommandInterface command,
                      int id)

Method Detail

getParameterCount

public int getParameterCount()
                      throws java.sql.SQLException

Returns the number of parameters.

Specified by:

getParameterCount in interface java.sql.ParameterMetaData

Returns:

the number

Throws:

java.sql.SQLException

getParameterMode

public int getParameterMode(int param)
                     throws java.sql.SQLException

Returns the parameter mode. Always returns parameterModeIn.

Specified by:

getParameterMode in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

parameterModeIn

Throws:

java.sql.SQLException

getParameterType

public int getParameterType(int param)
                     throws java.sql.SQLException

Returns the parameter type. java.sql.Types.VARCHAR is returned if the data type is not known.

Specified by:

getParameterType in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the data type

Throws:

java.sql.SQLException

getPrecision

public int getPrecision(int param)
                 throws java.sql.SQLException

Returns the parameter precision. The value 0 is returned if the precision is not known.

Specified by:

getPrecision in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the precision

Throws:

java.sql.SQLException

getScale

public int getScale(int param)
             throws java.sql.SQLException

Returns the parameter scale. The value 0 is returned if the scale is not known.

Specified by:

getScale in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the scale

Throws:

java.sql.SQLException

isNullable

public int isNullable(int param)
               throws java.sql.SQLException

Checks if this is nullable parameter. Returns ResultSetMetaData.columnNullableUnknown..

Specified by:

isNullable in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

ResultSetMetaData.columnNullableUnknown

Throws:

java.sql.SQLException

isSigned

public boolean isSigned(int param)
                 throws java.sql.SQLException

Checks if this parameter is signed. It always returns true.

Specified by:

isSigned in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

true

Throws:

java.sql.SQLException

getParameterClassName

public java.lang.String getParameterClassName(int param)
                                       throws java.sql.SQLException

Returns the Java class name of the parameter. "java.lang.String" is returned if the type is not known.

Specified by:

getParameterClassName in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the Java class name

Throws:

java.sql.SQLException

getParameterTypeName

public java.lang.String getParameterTypeName(int param)
                                      throws java.sql.SQLException

Returns the parameter type name. "VARCHAR" is returned if the type is not known.

Specified by:

getParameterTypeName in interface java.sql.ParameterMetaData

Parameters:

param - the column index (1,2,...)

Returns:

the type name

Throws:

java.sql.SQLException

getParameter

private ParameterInterface getParameter(int param)

checkClosed

private void checkClosed()

unwrap

public <T> T unwrap(java.lang.Class<T> iface)
             throws java.sql.SQLException

Return an object of this class if possible.

Specified by:

unwrap in interface java.sql.Wrapper

Parameters:

iface - the class

Returns:

this

Throws:

java.sql.SQLException

isWrapperFor

public boolean isWrapperFor(java.lang.Class<?> iface)
                     throws java.sql.SQLException

Checks if unwrap can return an object of this class.

Specified by:

isWrapperFor in interface java.sql.Wrapper

Parameters:

iface - the class

Returns:

whether or not the interface is assignable from this class

Throws:

java.sql.SQLException

toString

public java.lang.String toString()

INTERNAL

Overrides:

toString in class java.lang.Object