Package org.datanucleus.store.query.inmemory

Class AbstractResultClassMapper

  • Direct Known Subclasses:
    JDOQLResultClassMapper, JPQLResultClassMapper
    public class AbstractResultClassMapper
extends java.lang.Object
    Abstract mapper for getting results from a query. Extend for the specific query language.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected java.lang.Class resultClass  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      (package private) java.lang.reflect.Field getFieldForFieldNameInResultClass​(java.lang.Class cls, java.lang.String fieldName)
      Accessor for the Field for the specified field name of the supplied class.
      (package private) java.lang.Object getResultForResultSetRow​(java.lang.Object inputResult, java.lang.String[] fieldNames, java.lang.reflect.Field[] fields)
      Method to take the result(s) of a row of the query and convert it into an object of the resultClass type, using the rules from the JDO spec.
      java.util.Collection map​(java.util.Collection inputResults, Expression[] resultNames)
      Method to map the input results to the required result class type.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • resultClass

        protected java.lang.Class resultClass

    • Constructor Detail

      • AbstractResultClassMapper

        public AbstractResultClassMapper​(java.lang.Class resultClass)

    • Method Detail

      • map

        public java.util.Collection map​(java.util.Collection inputResults,
                                Expression[] resultNames)
        Method to map the input results to the required result class type.
        Parameters:
        inputResults - The results to process
        resultNames - Expressions for the result components of the input results (columns)
        Returns:
        Collection<resultClass>

      • getResultForResultSetRow

        java.lang.Object getResultForResultSetRow​(java.lang.Object inputResult,
                                          java.lang.String[] fieldNames,
                                          java.lang.reflect.Field[] fields)
        Method to take the result(s) of a row of the query and convert it into an object of the resultClass type, using the rules from the JDO spec.
        Parameters:
        inputResult - The result from the query
        fieldNames - Names of the fields (in the query, ordered)
        fields - The Field objects for the fields of the result class (ordered)
        Returns:
        Object of the resultClass type for the input result

      • getFieldForFieldNameInResultClass

        java.lang.reflect.Field getFieldForFieldNameInResultClass​(java.lang.Class cls,
                                                          java.lang.String fieldName)
        Accessor for the Field for the specified field name of the supplied class. Caters for the field being in superclasses.
        Parameters:
        cls - The class
        fieldName - Name of the field
        Returns:
        The field