com.trolltech.qt.sql
Class QSqlRelation

java.lang.Object
  extended by com.trolltech.qt.internal.QSignalEmitterInternal
      extended by com.trolltech.qt.QSignalEmitter
          extended by com.trolltech.qt.QtJambiObject
              extended by com.trolltech.qt.sql.QSqlRelation
All Implemented Interfaces:
QtJambiInterface, java.lang.Cloneable

public class QSqlRelation
extends QtJambiObject
implements java.lang.Cloneable

The QSqlRelation class stores information about an SQL foreign key. QSqlRelation is a helper class for QSqlRelationalTableModel. See QSqlRelationalTableModel::setRelation() and QSqlRelationalTableModel::relation() for details.

See also:
QSqlRelationalTableModel, QSqlRelationalDelegate, and Relational Table Model Example.


Nested Class Summary
 
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
QSignalEmitter.AbstractSignal, QSignalEmitter.PrivateSignal0, QSignalEmitter.PrivateSignal1, QSignalEmitter.PrivateSignal2, QSignalEmitter.PrivateSignal3, QSignalEmitter.PrivateSignal4, QSignalEmitter.PrivateSignal5, QSignalEmitter.PrivateSignal6, QSignalEmitter.PrivateSignal7, QSignalEmitter.PrivateSignal8, QSignalEmitter.PrivateSignal9, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9
 
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal
 
Field Summary
 
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
currentSender
 
Constructor Summary
QSqlRelation()
          Constructs an invalid QSqlRelation object.
QSqlRelation(java.lang.String aTableName, java.lang.String indexCol, java.lang.String displayCol)
          Constructs a QSqlRelation object, where tableName is the SQL table name to which a foreign key refers, indexColumn is the foreign key, and displayColumn is the field that should be presented to the user.
 
Method Summary
 QSqlRelation clone()
          This method is reimplemented for internal reasons
 java.lang.String displayColumn()
          Returns the column from table tableName() that should be presented to the user instead of a foreign key.
 java.lang.String indexColumn()
          Returns the index column from table tableName() to which a foreign key refers.
 boolean isValid()
          Returns true if the QSqlRelation object is valid; otherwise returns false.
 java.lang.String tableName()
          Returns the name of the table to which a foreign key refers.
 
Methods inherited from class com.trolltech.qt.QtJambiObject
dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr
 
Methods inherited from class com.trolltech.qt.QSignalEmitter
blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread
 
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
__qt_signalInitialization
 
Methods inherited from class java.lang.Object
getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface com.trolltech.qt.QtJambiInterface
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership
 

Constructor Detail

QSqlRelation

public QSqlRelation()
Constructs an invalid QSqlRelation object.

For such an object, the tableName(), indexColumn(), and displayColumn() functions return an empty string.

See also:
isValid().


QSqlRelation

public QSqlRelation(java.lang.String aTableName,
                    java.lang.String indexCol,
                    java.lang.String displayCol)
Constructs a QSqlRelation object, where tableName is the SQL table name to which a foreign key refers, indexColumn is the foreign key, and displayColumn is the field that should be presented to the user.

See also:
tableName(), indexColumn(), and displayColumn().

Method Detail

displayColumn

public final java.lang.String displayColumn()
Returns the column from table tableName() that should be presented to the user instead of a foreign key.


indexColumn

public final java.lang.String indexColumn()
Returns the index column from table tableName() to which a foreign key refers.


isValid

public final boolean isValid()
Returns true if the QSqlRelation object is valid; otherwise returns false.


tableName

public final java.lang.String tableName()
Returns the name of the table to which a foreign key refers.


clone

public QSqlRelation clone()
This method is reimplemented for internal reasons

Overrides:
clone in class java.lang.Object