Class MappingHelper
java.lang.Object
org.datanucleus.store.rdbms.mapping.MappingHelper
Helper class for handling mappings.
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected static Object
createObjectIdentityUsingReflection
(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd, Class objectIdClass) Create a user-defined id instance and fill the fields using reflection.protected static Object
createSingleFieldIdentity
(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd, Class objectIdClass, Class pcClass) Create a SingleFieldIdentity instancestatic Object
getApplicationIdentityForResultSetRow
(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the application identity for the persistable instance from the passed result set row.static Object
getDatastoreIdentityForResultSetRow
(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the datastore identity for the persistable object from the passed result set row.static int[]
getMappingIndices
(int initialPosition, JavaTypeMapping mapping) Convenience method to return an array of positions for datastore columns for the supplied mapping and the initial position value.protected static Object
getObjectForAbstractClass
(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Create an object id instance and fill the fields using reflectionstatic Object
getObjectForApplicationIdentity
(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the persistent object instance for a class using application identity defined by the provided result set columnsstatic Object
getObjectForDatastoreIdentity
(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the persistable object instance for a class using datastore identity defined by result set columns.
-
Constructor Details
-
MappingHelper
private MappingHelper()
-
-
Method Details
-
getMappingIndices
Convenience method to return an array of positions for datastore columns for the supplied mapping and the initial position value. For example if the mapping has a single datastore column and the initial position is 1 then returns the array {1}.- Parameters:
initialPosition
- the initialPositionmapping
- the Mapping- Returns:
- an array containing indexes for parameters
-
getObjectForDatastoreIdentity
public static Object getObjectForDatastoreIdentity(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the persistable object instance for a class using datastore identity defined by result set columns.- Parameters:
ec
- ExecutionContextmapping
- The mapping in which this is returnedrs
- the ResultSetresultIndexes
- indexes for the result setcmd
- the AbstractClassMetaData- Returns:
- the persistable object
-
getDatastoreIdentityForResultSetRow
public static Object getDatastoreIdentityForResultSetRow(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the datastore identity for the persistable object from the passed result set row.- Parameters:
ec
- ExecutionContextmapping
- The mapping in which this is returnedrs
- the ResultSetresultIndexes
- indexes for the result setcmd
- the AbstractClassMetaData- Returns:
- the id
-
getApplicationIdentityForResultSetRow
public static Object getApplicationIdentityForResultSetRow(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the application identity for the persistable instance from the passed result set row.- Parameters:
ec
- ExecutionContextmapping
- The Java Type mapping for the instancers
- the ResultSetresultIndexes
- indexes of the ResultSet for the PK field(s)cmd
- the AbstractClassMetaData- Returns:
- the id
-
getObjectForApplicationIdentity
public static Object getObjectForApplicationIdentity(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Get the persistent object instance for a class using application identity defined by the provided result set columns- Parameters:
ec
- ExecutionContextmapping
- The mapping in which this is returnedrs
- the ResultSetresultIndexes
- indexes in the result set to retrievecmd
- the AbstractClassMetaData- Returns:
- the persistent object instance
-
getObjectForAbstractClass
protected static Object getObjectForAbstractClass(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd) Create an object id instance and fill the fields using reflection- Parameters:
ec
- ExecutionContextmapping
- Mapping in which this is returnedrs
- the ResultSetresultIndexes
- indexes of the result set to usecmd
- the AbstractClassMetaData- Returns:
- the id
-
createSingleFieldIdentity
protected static Object createSingleFieldIdentity(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd, Class objectIdClass, Class pcClass) Create a SingleFieldIdentity instance- Parameters:
ec
- ExecutionContextmapping
- Mapping in which this is returnedrs
- the ResultSetresultIndexes
- the result set index(es)cmd
- the AbstractClassMetaDataobjectIdClass
- the object id classpcClass
- the persistable class- Returns:
- the id
-
createObjectIdentityUsingReflection
protected static Object createObjectIdentityUsingReflection(org.datanucleus.ExecutionContext ec, JavaTypeMapping mapping, ResultSet rs, int[] resultIndexes, org.datanucleus.metadata.AbstractClassMetaData cmd, Class objectIdClass) Create a user-defined id instance and fill the fields using reflection.- Parameters:
ec
- ExecutionContextmapping
- Mapping in which this is returnedrs
- the ResultSetresultIndexes
- the result set index(es)cmd
- the AbstractClassMetaDataobjectIdClass
- the object id class- Returns:
- the id
-