private static Constructor retrieveCollectionProxyConstructor ( Class proxyClass , Class baseType , String typeDesc ) { if ( proxyClass == null ) { throw new MetadataException ( "No " + typeDesc + " specified." ) ; } if ( proxyClass . isInterface ( ) || Modifier . isAbstract ( proxyClass . getModifiers ( ) ) || ! baseType . isAssignableFrom ( proxyClass ) ) { throw new MetadataException ( "Illegal class " + proxyClass . getName ( ) + " specified for " + typeDesc + ". Must be a concrete subclass of " + baseType . getName ( ) ) ; } Class [ ] paramType = { PBKey . class , Class . class , Query . class } ; try { return proxyClass . getConstructor ( paramType ) ; } catch ( NoSuchMethodException ex ) { throw new MetadataException ( "The class " + proxyClass . getName ( ) + " specified for " + typeDesc + " is required to have a public constructor with signature (" + PBKey . class . getName ( ) + ", " + Class . class . getName ( ) + ", " + Query . class . getName ( ) + ")." ) ; } }
Retrieves the constructor that is used by OJB to create instances of the given collection proxy class .