Package org.hibernate.transform
Class CacheableResultTransformer
- java.lang.Object
-
- org.hibernate.transform.CacheableResultTransformer
-
- All Implemented Interfaces:
java.io.Serializable
,ResultTransformer
public class CacheableResultTransformer extends java.lang.Object implements ResultTransformer
A ResultTransformer that is used to transform tuples to a value(s) that can be cached.- See Also:
- Serialized Form
-
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static CacheableResultTransformer
create(ResultTransformer transformer, java.lang.String[] aliases, boolean[] includeInTuple)
Returns a CacheableResultTransformer that is used to transform tuples to a value(s) that can be cached.boolean
equals(java.lang.Object o)
Type[]
getCachedResultTypes(Type[] tupleResultTypes)
int
hashCode()
java.util.List
retransformResults(java.util.List transformedResults, java.lang.String[] aliases, ResultTransformer transformer, boolean[] includeInTuple)
Re-transforms, if necessary, a List of values previously transformed by this (or an equivalent) CacheableResultTransformer.java.util.List
transformList(java.util.List list)
Here we have an opportunity to perform transformation on the query result as a whole.java.lang.Object
transformTuple(java.lang.Object[] tuple, java.lang.String[] aliases)
Tuples are the elements making up each "row" of the query result.java.util.List
untransformToTuples(java.util.List results)
Untransforms, if necessary, a List of values previously transformed by this (or an equivalent) CacheableResultTransformer.
-
-
-
Method Detail
-
create
public static CacheableResultTransformer create(ResultTransformer transformer, java.lang.String[] aliases, boolean[] includeInTuple)
Returns a CacheableResultTransformer that is used to transform tuples to a value(s) that can be cached.- Parameters:
transformer
- - result transformer that will ultimately be be used (after caching results)aliases
- - the aliases that correspond to the tuple; if it is non-null, its length must equal the number of true elements in includeInTuple[]includeInTuple
- - array with the i-th element indicating whether the i-th expression returned by a query is included in the tuple; the number of true values equals the length of the tuple that will be transformed; must be non-null- Returns:
- a CacheableResultTransformer that is used to transform tuples to a value(s) that can be cached.
-
transformTuple
public java.lang.Object transformTuple(java.lang.Object[] tuple, java.lang.String[] aliases)
Description copied from interface:ResultTransformer
Tuples are the elements making up each "row" of the query result. The contract here is to transform these elements into the final row.- Specified by:
transformTuple
in interfaceResultTransformer
- Parameters:
tuple
- The result elementsaliases
- The result aliases ("parallel" array to tuple)- Returns:
- The transformed row.
-
retransformResults
public java.util.List retransformResults(java.util.List transformedResults, java.lang.String[] aliases, ResultTransformer transformer, boolean[] includeInTuple)
Re-transforms, if necessary, a List of values previously transformed by this (or an equivalent) CacheableResultTransformer. Each element of the list is re-transformed in place (i.e, List elements are replaced with re-transformed values) and the original List is returned. If re-transformation is unnecessary, the original List is returned unchanged.- Parameters:
transformedResults
- - results that were previously transformedaliases
- - the aliases that correspond to the untransformed tuple;transformer
- - the transformer for the re-transformationincludeInTuple
- indicates the indexes of- Returns:
- transformedResults, with each element re-transformed (if nececessary)
-
untransformToTuples
public java.util.List untransformToTuples(java.util.List results)
Untransforms, if necessary, a List of values previously transformed by this (or an equivalent) CacheableResultTransformer. Each element of the list is untransformed in place (i.e, List elements are replaced with untransformed values) and the original List is returned. If not unnecessary, the original List is returned unchanged. NOTE: If transformed values are a subset of the original tuple, then, on return, elements corresponding to excluded tuple elements will be null.- Parameters:
results
- - results that were previously transformed- Returns:
- results, with each element untransformed (if nececessary)
-
transformList
public java.util.List transformList(java.util.List list)
Description copied from interface:ResultTransformer
Here we have an opportunity to perform transformation on the query result as a whole. This might be useful to convert from one collection type to another or to remove duplicates from the result, etc.- Specified by:
transformList
in interfaceResultTransformer
- Parameters:
list
- The result.- Returns:
- The transformed result.
-
equals
public boolean equals(java.lang.Object o)
- Overrides:
equals
in classjava.lang.Object
-
hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
-
-