QueryableDatatypeSyncer.DBSafeInternalQDTAdaptor (DBvolution 10 0.9.2 API)

java.lang.Object
- nz.co.gregs.dbvolution.datatypes.QueryableDatatypeSyncer.DBSafeInternalQDTAdaptor

Enclosing class:

QueryableDatatypeSyncer
```
public static class QueryableDatatypeSyncer.DBSafeInternalQDTAdaptor
extends java.lang.Object
```
One-shot cycle-aware recursive QDT adaptor. Converts from existing QDT to brand new one, and copies from one QDT to another.
DBOperators can reference the same QDT that own the operator instance, such as: QueryableDatatype.setLiteralValue{this.operator = new DBEqualsOperator(this)}. Cycles are handled by tracking source QDTs observed and returning the previously mapped target QDT when re-observed.
Must be used only once for a given read or write of a field.

Constructor Summary

Constructors
Constructor	Description
`DBSafeInternalQDTAdaptor(java.lang.Class<? extends QueryableDatatype<?>> targetQdtType, SafeOneWaySimpleTypeAdaptor typeAdaptor)`	Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`DBExpression`	`convert(DBExpression source)`	Creates a brand new QDT of the configured target type, based on converted values from the given QDT.
`protected void`	`setTargetQDTFromSourceQDT(QueryableDatatype<?> targetQdt, QueryableDatatype<?> sourceQdt)`	Updates the target QDT with converted values from the source QDT.

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

- Constructor Detail
  - DBSafeInternalQDTAdaptor
```
public DBSafeInternalQDTAdaptor(java.lang.Class<? extends QueryableDatatype<?>> targetQdtType,
                                SafeOneWaySimpleTypeAdaptor typeAdaptor)
```
    Constructor
    
    Parameters:
    
    targetQdtType - targetQdtType
    
    typeAdaptor - typeAdaptor
- Method Detail
  - convert
```
public DBExpression convert(DBExpression source)
```
    Creates a brand new QDT of the configured target type, based on converted values from the given QDT. Recursively traverses the operators and inner QDT references within the given QDT.
    If source is null, returns null.
    
    Parameters:
    
    source - the QDT to convert to the target type, may be null
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    Returns:
    
    the newly created QDT of the target type, or null if source was null
  - setTargetQDTFromSourceQDT
```
protected void setTargetQDTFromSourceQDT(QueryableDatatype<?> targetQdt,
                                         QueryableDatatype<?> sourceQdt)
```
    Updates the target QDT with converted values from the source QDT. Recursively traverses the operations and inner QDT references within the given source QTD.
    
    Parameters:
    
    targetQdt - the QDT to update (must not be null)
    
    sourceQdt - the QDT with values to convert and copy to the target (must not be null)