DropDependencyFilter (Apache Derby V10.14 Internals)

java.lang.Object
- org.apache.derby.impl.sql.catalog.DropDependencyFilter

All Implemented Interfaces:

TupleFilter
```
public class DropDependencyFilter
extends java.lang.Object
implements TupleFilter
```
A Filter to qualify tuples coming from a scan of SYSDEPENDS. Tuples qualify if they have the right providerID.

Field Summary

Fields
Modifier and Type	Field	Description
`(package private) DataValueFactory`	`dataValueFactory`
`(package private) BooleanDataValue`	`falseValue`
`(package private) UUID`	`providerID`
`(package private) BooleanDataValue`	`trueValue`
`(package private) UUIDFactory`	`uuidFactory`

Constructor Summary

Constructors
Constructor Description

DropDependencyFilter(UUID providerID)
Construct a TupleFilter to qualify SYSDEPENDS rows with the designated providerID.

Constructors
Constructor	Description
`DropDependencyFilter(UUID providerID)`	Construct a TupleFilter to qualify SYSDEPENDS rows with the designated providerID.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`BooleanDataValue`	`execute(ExecRow currentRow)`	Pump a SYSDEPENDS row through the Filter.
`private BooleanDataValue`	`getFalseValue()`	Gets a BooleanDataValue representing FALSE
`private BooleanDataValue`	`getTrueValue()`	Gets a BooleanDataValue representing TRUE.
`private UUIDFactory`	`getUUIDFactory()`	Get the UUID factory
`void`	`init(ExecRow parameters)`	Initialize a Filter with a vector of parameters.

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

- Field Detail
  - providerID
```
UUID providerID
```
  - uuidFactory
```
UUIDFactory uuidFactory
```
  - dataValueFactory
```
DataValueFactory dataValueFactory
```
  - trueValue
```
BooleanDataValue trueValue
```
  - falseValue
```
BooleanDataValue falseValue
```
- Constructor Detail
  - DropDependencyFilter
```
public DropDependencyFilter(UUID providerID)
```
    Construct a TupleFilter to qualify SYSDEPENDS rows with the designated providerID.
    
    Parameters:
    
    providerID - UUID of provider. Tuples with this ID qualify.
- Method Detail
  - init
```
public void init(ExecRow parameters)
          throws StandardException
```
    Initialize a Filter with a vector of parameters. This is a NOP. We initialize this filter at Constructor time.
    
    Specified by:
    
    init in interface TupleFilter
    
    Parameters:
    
    parameters - An ExecRow of parameter values
    
    Throws:
    
    StandardException - Thrown on error
  - execute
```
public BooleanDataValue execute(ExecRow currentRow)
                         throws StandardException
```
    Pump a SYSDEPENDS row through the Filter. If the providerID of the row matches our providerID, we return true. Otherwise we return false.
    
    Specified by:
    
    execute in interface TupleFilter
    
    Parameters:
    
    currentRow - SYSDEPENDS row
    
    Returns:
    
    True if the row has our providerID. False otherwise.
    
    Throws:
    
    StandardException - Thrown on error
  - getUUIDFactory
```
private UUIDFactory getUUIDFactory()
                            throws StandardException
```
    Get the UUID factory
    
    Returns:
    
    the UUID factory
    
    Throws:
    
    StandardException - thrown on failure
  - getTrueValue
```
private BooleanDataValue getTrueValue()
                               throws StandardException
```
    Gets a BooleanDataValue representing TRUE.
    
    Returns:
    
    a TRUE value
    
    Throws:
    
    StandardException - Thrown on error
  - getFalseValue
```
private BooleanDataValue getFalseValue()
                                throws StandardException
```
    Gets a BooleanDataValue representing FALSE
    
    Returns:
    
    a FALSE value
    
    Throws:
    
    StandardException - Thrown on error

Class DropDependencyFilter

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

providerID

uuidFactory

dataValueFactory

trueValue

falseValue

Constructor Detail

DropDependencyFilter

Method Detail

init

execute

getUUIDFactory

getTrueValue

getFalseValue