下面列出了怎么用org.hibernate.sql.QueryJoinFragment的API类实例代码及写法,或者点击链接到github查看源代码。
public JoinFragment toJoinFragment(
Map enabledFilters,
boolean includeExtraJoins,
String withClauseFragment,
String withClauseJoinAlias) throws MappingException {
QueryJoinFragment joinFragment = new QueryJoinFragment( factory.getDialect(), useThetaStyle );
if ( rootJoinable != null ) {
joinFragment.addCrossJoin( rootJoinable.getTableName(), rootAlias );
String filterCondition = rootJoinable.filterFragment( rootAlias, enabledFilters );
// JoinProcessor needs to know if the where clause fragment came from a dynamic filter or not so it
// can put the where clause fragment in the right place in the SQL AST. 'hasFilterCondition' keeps track
// of that fact.
joinFragment.setHasFilterCondition( joinFragment.addCondition( filterCondition ) );
if (includeExtraJoins) { //TODO: not quite sure about the full implications of this!
addExtraJoins( joinFragment, rootAlias, rootJoinable, true );
}
}
Joinable last = rootJoinable;
for ( int i = 0; i < joins.size(); i++ ) {
Join join = ( Join ) joins.get( i );
String on = join.getAssociationType().getOnCondition( join.getAlias(), factory, enabledFilters );
String condition = null;
if ( last != null &&
isManyToManyRoot( last ) &&
( ( QueryableCollection ) last ).getElementType() == join.getAssociationType() ) {
// the current join represents the join between a many-to-many association table
// and its "target" table. Here we need to apply any additional filters
// defined specifically on the many-to-many
String manyToManyFilter = ( ( QueryableCollection ) last )
.getManyToManyFilterFragment( join.getAlias(), enabledFilters );
condition = "".equals( manyToManyFilter )
? on
: "".equals( on )
? manyToManyFilter
: on + " and " + manyToManyFilter;
}
else {
condition = on;
}
if ( withClauseFragment != null ) {
if ( join.getAlias().equals( withClauseJoinAlias ) ) {
condition += " and " + withClauseFragment;
}
}
joinFragment.addJoin(
join.getJoinable().getTableName(),
join.getAlias(),
join.getLHSColumns(),
JoinHelper.getRHSColumnNames( join.getAssociationType(), factory ),
join.joinType,
condition
);
if (includeExtraJoins) { //TODO: not quite sure about the full implications of this!
addExtraJoins( joinFragment, join.getAlias(), join.getJoinable(), join.joinType == JoinFragment.INNER_JOIN );
}
last = join.getJoinable();
}
if ( next != null ) {
joinFragment.addFragment( next.toJoinFragment( enabledFilters, includeExtraJoins ) );
}
joinFragment.addCondition( conditions.toString() );
if ( isFromPart ) joinFragment.clearWherePart();
return joinFragment;
}