/**
* Clear associated models' save state. After this method, the associated models of baseObj which
* data is removed from database will become unsaved.
*
* @param baseObj The record to delete.
* @param associationInfos The associated info.
*/
private void clearAssociatedModelSaveState(
DataSupport baseObj, Collection<AssociationsInfo> associationInfos) {
try {
for (AssociationsInfo associationInfo : associationInfos) {
if (associationInfo.getAssociationType() == Const.Model.MANY_TO_ONE
&& !baseObj.getClassName().equals(associationInfo.getClassHoldsForeignKey())) {
Collection<DataSupport> associatedModels = getAssociatedModels(baseObj, associationInfo);
if (associatedModels != null && !associatedModels.isEmpty()) {
for (DataSupport model : associatedModels) {
if (model != null) {
model.resetBaseObjId();
}
}
}
} else if (associationInfo.getAssociationType() == Const.Model.ONE_TO_ONE) {
DataSupport model = getAssociatedModel(baseObj, associationInfo);
if (model != null) {
model.resetBaseObjId();
}
}
}
} catch (Exception e) {
throw new DataSupportException(e.getMessage());
}
}
/**
* Package a {@link org.litepal.crud.model.AssociationsInfo}, and add it into {@link
* #mAssociationInfos} Collection.
*
* @param selfClassName The class name of self model.
* @param associatedClassName The class name of the class which associated with self class.
* @param classHoldsForeignKey The class which holds foreign key.
* @param associateOtherModelFromSelf The field of self class to declare has association with
* other class.
* @param associateSelfFromOtherModel The field of the associated class to declare has association
* with self class.
* @param associationType The association type.
*/
private void addIntoAssociationInfoCollection(
String selfClassName,
String associatedClassName,
String classHoldsForeignKey,
Field associateOtherModelFromSelf,
Field associateSelfFromOtherModel,
int associationType) {
AssociationsInfo associationInfo = new AssociationsInfo();
associationInfo.setSelfClassName(selfClassName);
associationInfo.setAssociatedClassName(associatedClassName);
associationInfo.setClassHoldsForeignKey(classHoldsForeignKey);
associationInfo.setAssociateOtherModelFromSelf(associateOtherModelFromSelf);
associationInfo.setAssociateSelfFromOtherModel(associateSelfFromOtherModel);
associationInfo.setAssociationType(associationType);
mAssociationInfos.add(associationInfo);
}
/**
* Analyze the associations of modelClass and store the associated tables. The associated tables
* might be used when deleting referenced data of a specified row.
*
* @param modelClass To get associations of this class.
*/
private void analyzeAssociations(Class<?> modelClass) {
Collection<AssociationsInfo> associationInfos = getAssociationInfo(modelClass.getName());
for (AssociationsInfo associationInfo : associationInfos) {
String associatedTableName =
DBUtility.getTableNameByClassName(associationInfo.getAssociatedClassName());
if (associationInfo.getAssociationType() == Const.Model.MANY_TO_ONE
|| associationInfo.getAssociationType() == Const.Model.ONE_TO_ONE) {
String classHoldsForeignKey = associationInfo.getClassHoldsForeignKey();
if (!modelClass.getName().equals(classHoldsForeignKey)) {
getForeignKeyTableToDelete().add(associatedTableName);
}
} else if (associationInfo.getAssociationType() == Const.Model.MANY_TO_MANY) {
String joinTableName =
DBUtility.getIntermediateTableName(getTableName(modelClass), associatedTableName);
joinTableName = BaseUtility.changeCase(joinTableName);
getForeignKeyTableToDelete().add(joinTableName);
}
}
}