org.apache.derby.impl.sql
Class GenericParameterValueSet

java.lang.Object
  org.apache.derby.impl.sql.GenericParameterValueSet

All Implemented Interfaces:

ParameterValueSet

final class GenericParameterValueSet
extends java.lang.Object
implements ParameterValueSet

Implementation of ParameterValueSet

See Also:

ParameterValueSet

Field Summary

(package private) ClassInspector	ci
private boolean	hasReturnOutputParam
private GenericParameter[]	parms

Constructor Summary

(package private)	GenericParameterValueSet(ClassInspector ci, int numParms, boolean hasReturnOutputParam) Constructor for a GenericParameterValueSet
private	GenericParameterValueSet(int numParms, GenericParameterValueSet pvs)

Method Summary

boolean	allAreSet() Tells whether all the parameters are set and ready for execution.
boolean	checkNoDeclaredOutputParameters() Check that there are not output parameters defined by the parameter set.
private void	checkPosition(int position) Check the position number for a parameter and throw an exception if it is out of range.
void	clearParameters() Sets all parameters to an uninitialized state.
ParameterValueSet	getClone() Clone the ParameterValueSet and its contents.
(package private) GenericParameter	getGenericParameter(int position)
DataValueDescriptor	getParameter(int position) Returns the parameter value at the given position.
int	getParameterCount() Returns the number of parameters in this set.
DataValueDescriptor	getParameterForGet(int position) Get the DataValueDescriptor for an INOUT or OUT parameter.
DataValueDescriptor	getParameterForSet(int position) Returns the parameter at the given position in order to set it.
short	getParameterMode(int parameterIndex) Return the mode of the parameter according to JDBC 3.0 ParameterMetaData
int	getParameterNumber(GenericParameter theParam) Return the parameter number (in jdbc lingo, i.e. 1 based) for the given parameter.
int	getPrecision(int parameterIndex) Return the precision of the given parameter index in this pvs.
DataValueDescriptor	getReturnValueForSet() Get the value of the return parameter in order to set it.
int	getScale(int parameterIndex) Return the scale of the given parameter index in this pvs.
boolean	hasReturnOutputParameter() Is there a return output parameter in this pvs.
void	initialize(DataTypeDescriptor[] types) Initialize the set by allocating a holder DataValueDescriptor object for each parameter.
void	registerOutParameter(int parameterIndex, int jdbcType, int scale) Mark the parameter as an output parameter.
void	setParameterAsObject(int position, java.lang.Object value) Set the value of this user defined parameter to the passed in Object.
void	setParameterMode(int position, int mode) Set the mode of the parameter, called when setting up static method calls and stored procedures.
java.lang.String	toString()
void	transferDataValues(ParameterValueSet pvstarget) Set the parameter values of the pvstarget to equal those set in this PVS.
void	validate() Validate the parameters.

Methods inherited from class java.lang.Object

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

Field Detail

parms

private final GenericParameter[] parms

ci

final ClassInspector ci

hasReturnOutputParam

private final boolean hasReturnOutputParam

Constructor Detail

GenericParameterValueSet

GenericParameterValueSet(ClassInspector ci,
                         int numParms,
                         boolean hasReturnOutputParam)

Constructor for a GenericParameterValueSet

Parameters:

numParms - The number of parameters in the new ParameterValueSet

hasReturnOutputParam - if we have a ? = call syntax. Note that this is NOT the same thing as an output parameter -- return output parameters are special cases of output parameters.

GenericParameterValueSet

private GenericParameterValueSet(int numParms,
                                 GenericParameterValueSet pvs)

Method Detail

initialize

public void initialize(DataTypeDescriptor[] types)
                throws StandardException

Initialize the set by allocating a holder DataValueDescriptor object for each parameter.

Specified by:

initialize in interface ParameterValueSet

Parameters:

types - expected to match the number of parameters.

Throws:

StandardException

setParameterMode

public void setParameterMode(int position,
                             int mode)

Description copied from interface: ParameterValueSet

Set the mode of the parameter, called when setting up static method calls and stored procedures. Otherwise the parameter type will default to an IN parameter.

Specified by:

setParameterMode in interface ParameterValueSet

clearParameters

public void clearParameters()

Description copied from interface: ParameterValueSet

Sets all parameters to an uninitialized state. An exception will be thrown if the caller tries to execute a PreparedStatement when one or more parameters is uninitialized (i.e. has not had setParameterValue() called on it.

Specified by:

clearParameters in interface ParameterValueSet

See Also:

ParameterValueSet.clearParameters()

getParameterCount

public int getParameterCount()

Returns the number of parameters in this set.

Specified by:

getParameterCount in interface ParameterValueSet

Returns:

The number of parameters in this set.

getParameter

public DataValueDescriptor getParameter(int position)
                                 throws StandardException

Returns the parameter value at the given position.

Specified by:

getParameter in interface ParameterValueSet

Returns:

The parameter at the given position.

Throws:

StandardException - Thrown on error

getParameterForSet

public DataValueDescriptor getParameterForSet(int position)
                                       throws StandardException

Description copied from interface: ParameterValueSet

Returns the parameter at the given position in order to set it. Setting via an unknown object type must use setParameterAsObject() to ensure correct typing.

Specified by:

getParameterForSet in interface ParameterValueSet

Returns:

The parameter at the given position.

Throws:

StandardException - Thrown on error

getParameterForGet

public DataValueDescriptor getParameterForGet(int position)
                                       throws StandardException

Description copied from interface: ParameterValueSet

Get the DataValueDescriptor for an INOUT or OUT parameter.

Specified by:

getParameterForGet in interface ParameterValueSet

Parameters:

position - Zero based index of the parameter.

Returns:

Parameter's value holder.

Throws:

StandardException - Position out of range or the parameter is not INOUT or OUT.

setParameterAsObject

public void setParameterAsObject(int position,
                                 java.lang.Object value)
                          throws StandardException

Description copied from interface: ParameterValueSet

Set the value of this user defined parameter to the passed in Object.

Specified by:

setParameterAsObject in interface ParameterValueSet

Throws:

StandardException - Thrown on error

allAreSet

public boolean allAreSet()

Description copied from interface: ParameterValueSet

Tells whether all the parameters are set and ready for execution. OUT are not required to be set.

Specified by:

allAreSet in interface ParameterValueSet

Returns:

true if all parameters are set, false if at least one parameter is not set.

See Also:

ParameterValueSet.allAreSet()

transferDataValues

public void transferDataValues(ParameterValueSet pvstarget)
                        throws StandardException

Description copied from interface: ParameterValueSet

Set the parameter values of the pvstarget to equal those set in this PVS. Used to transfer saved SPS parameters to the actual prepared statement parameters once associated parameters have been established. Assumes pvstarget is the same length as this.

Specified by:

transferDataValues in interface ParameterValueSet

Parameters:

pvstarget - ParameterValueSet which will recieve the values

Throws:

StandardException - values not compatible

See Also:

ParameterValueSet.transferDataValues(org.apache.derby.iapi.sql.ParameterValueSet)

getGenericParameter

GenericParameter getGenericParameter(int position)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

checkPosition

private void checkPosition(int position)
                    throws StandardException

Check the position number for a parameter and throw an exception if it is out of range.

Parameters:

position - The position number to check

Throws:

StandardException - Thrown if position number is out of range.

getClone

public ParameterValueSet getClone()

Description copied from interface: ParameterValueSet

Clone the ParameterValueSet and its contents.

Specified by:

getClone in interface ParameterValueSet

Returns:

ParameterValueSet A clone of the ParameterValueSet and its contents.

registerOutParameter

public void registerOutParameter(int parameterIndex,
                                 int jdbcType,
                                 int scale)
                          throws StandardException

Mark the parameter as an output parameter.

Specified by:

registerOutParameter in interface ParameterValueSet

Parameters:

parameterIndex - The ordinal parameterIndex of a parameter to set to the given value.

jdbcType - A type from java.sql.Types

scale - the scale to use. -1 means ignore scale

Throws:

StandardException - on error

validate

public void validate()
              throws StandardException

Validate the parameters. This is done for situations where we cannot validate everything in the setXXX() calls. In particular, before we do an execute() on a CallableStatement, we need to go through the parameters and make sure that all parameters are set up properly. The motivator for this is that setXXX() can be called either before or after registerOutputParamter(), we cannot be sure we have the types correct until we get to execute().

Specified by:

validate in interface ParameterValueSet

Throws:

StandardException - if the parameters aren't valid

getParameterNumber

public int getParameterNumber(GenericParameter theParam)

Return the parameter number (in jdbc lingo, i.e. 1 based) for the given parameter. Linear search.

Returns:

the parameter number, or 0 if not found

checkNoDeclaredOutputParameters

public boolean checkNoDeclaredOutputParameters()

Check that there are not output parameters defined by the parameter set. If there are unknown parameter types they are forced to input types. i.e. Derby static method calls with parameters that are array.

Specified by:

checkNoDeclaredOutputParameters in interface ParameterValueSet

Returns:

true if a declared Java Procedure INOUT or OUT parameter is in the set, false otherwise.

getParameterMode

public short getParameterMode(int parameterIndex)

Return the mode of the parameter according to JDBC 3.0 ParameterMetaData

Specified by:

getParameterMode in interface ParameterValueSet

Parameters:

parameterIndex - the first parameter is 1, the second is 2, ...

hasReturnOutputParameter

public boolean hasReturnOutputParameter()

Is there a return output parameter in this pvs. A return parameter is from a CALL statement of the following syntax: ? = CALL myMethod()

Specified by:

hasReturnOutputParameter in interface ParameterValueSet

Returns:

true if it has a return parameter

getReturnValueForSet

public DataValueDescriptor getReturnValueForSet()
                                         throws StandardException

Get the value of the return parameter in order to set it.

Specified by:

getReturnValueForSet in interface ParameterValueSet

Throws:

StandardException - if a database-access error occurs.

getScale

public int getScale(int parameterIndex)

Return the scale of the given parameter index in this pvs.

Specified by:

getScale in interface ParameterValueSet

Parameters:

parameterIndex - the first parameter is 1, the second is 2, ...

Returns:

scale

getPrecision

public int getPrecision(int parameterIndex)

Return the precision of the given parameter index in this pvs.

Specified by:

getPrecision in interface ParameterValueSet

Parameters:

parameterIndex - the first parameter is 1, the second is 2, ...

Returns:

precision