Package org.synchronoss.cpo.core.meta

Class ResultSetCpoData

java.lang.Object

org.synchronoss.cpo.core.AbstractCpoData

org.synchronoss.cpo.core.meta.AbstractBindableCpoData

org.synchronoss.cpo.core.meta.ResultSetCpoData

All Implemented Interfaces:

CpoData

Direct Known Subclasses:

CassandraResultSetCpoData, JdbcResultSetCpoData

public abstract class ResultSetCpoData
extends AbstractBindableCpoData

Base CpoData implementation for reading a bound attribute's value out of a datastore result row (e.g. a JDBC ResultSet or Cassandra Row). Resolves the appropriate MethodMapEntry for the attribute's data type on first use and caches it, since it cannot change across invocations of the same bound instance; datastore implementations supply the actual reflective invocation via invokeGetterImpl(org.synchronoss.cpo.core.meta.domain.CpoAttribute, org.synchronoss.cpo.core.meta.MethodMapEntry<?, ?>).

Author:

dberry

Constructor Summary

Constructors

Constructor	Description
ResultSetCpoData(MethodMapper<?> methodMapper, Object rs, CpoAttribute cpoAttribute, int index)	Creates an instance bound to a single column/attribute of the given result row.

Method Summary

Modifier and Type	Method	Description
Object	getRs()	Gets the datastore-specific result row object this instance reads from.
Object	invokeGetter()	Invokes the bean's getter for the bound attribute.

Methods inherited from class org.synchronoss.cpo.core.meta.AbstractBindableCpoData

getIndex

Methods inherited from class org.synchronoss.cpo.core.AbstractCpoData

getCpoAttribute, getDataGetterReturnType, getDataSetterParamType, invokeSetter, setCpoAttribute, transformIn, transformOut

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ResultSetCpoData

public ResultSetCpoData(MethodMapper<?> methodMapper,
 Object rs,
 CpoAttribute cpoAttribute,
 int index)

Creates an instance bound to a single column/attribute of the given result row.

Parameters:

methodMapper - the mapper used to resolve the getter method for the attribute's data type

rs - the datastore-specific result row object (e.g. ResultSet or Row)

cpoAttribute - the attribute this instance reads

index - the positional index (e.g. column index) of this binding

Method Details

getRs

public Object getRs()

Gets the datastore-specific result row object this instance reads from.

Returns:

the result row object (e.g. ResultSet or Row)

invokeGetter

public Object invokeGetter()
                    throws CpoException

Invokes the bean's getter for the bound attribute.

Not implemented by this base class; subclasses that support reflective getter invocation must override this method.

Resolves (and caches) the MethodMapEntry for the attribute's data getter return type, invokes the datastore-specific getter via invokeGetterImpl(org.synchronoss.cpo.core.meta.domain.CpoAttribute, org.synchronoss.cpo.core.meta.MethodMapEntry<?, ?>), and applies the attribute's transform.

Specified by:

invokeGetter in interface CpoData

Overrides:

invokeGetter in class AbstractCpoData

Returns:

the value returned by the attribute's getter

Throws:

CpoException - if the getter cannot be invoked