Package org.apache.openjpa.meta

Class JavaTypes

  • public class JavaTypes
extends Object
    Type constants for managed fields.
    Author:
    Abe White

    • Constructor Detail

      • JavaTypes

        public JavaTypes()

    • Method Detail

      • getTypeCode

        public static int getTypeCode​(Class<?> type)
        Return the field metadata type code for the given class. First class objects are not recognized in this method.

      • classForName

        public static Class<?> classForName​(String name,
                                    ClassMetaData context)
        Check the given name against the same set of standard packages used when parsing metadata.

      • classForName

        public static Class<?> classForName​(String name,
                                    ClassMetaData context,
                                    ClassLoader loader)
        Check the given name against the same set of standard packages used when parsing metadata.

      • classForName

        public static Class<?> classForName​(String name,
                                    ClassMetaData context,
                                    ClassLoader loader,
                                    boolean mustExist)
        Check the given name against the same set of standard packages used when parsing metadata.
        Parameters:
        mustExist - Whether the supplied loader must be able to load the class. If true no attempt to use a different classloader will be made. If false the ClassResolver from the configuration will be used.

      • classForName

        public static Class<?> classForName​(String name,
                                    ValueMetaData context)
        Check the given name against the same set of standard packages used when parsing metadata.

      • classForName

        public static Class<?> classForName​(String name,
                                    ValueMetaData context,
                                    ClassLoader loader)
        Check the given name against the same set of standard packages used when parsing metadata.

      • classForName

        public static Class<?> classForName​(String name,
                                    ValueMetaData context,
                                    ClassLoader loader,
                                    boolean mustExist)
        Try to load a class using the provided loader. Optionally tries the configuration's ClassResolver if the supplied loader cannot find the class.
        Parameters:
        name - Name of the class to load.
        loader - ClassLoader to use. If null, the configuration's ClassResolver will be used.
        mustExist - Whether the supplied loader must be able to load the class. If true no attempt to use a different classloader will be made. If false the ClassResolver from the configuration will be used.

      • convert

        public static Object convert​(Object val,
                             int typeCode)
        Convert the given object to the given type if possible. If the type is a numeric primitive, this method only guarantees that the return value is a Number. If no known conversion or the value is null, returns the original value.

      • maybePC

        public static boolean maybePC​(FieldMetaData field)
        Return true if the (possibly unresolved) field or its elements might be persistence capable objects.

      • maybePC

        public static boolean maybePC​(ValueMetaData val)
        Return true if the (possibly unresolved) value might be a first class object.

      • toList

        public static <T> List<T> toList​(Object val,
                                 Class<T> elem,
                                 boolean mutable)
        Helper method to return the given array value as a collection.

      • toArray

        public static Object toArray​(Collection<?> coll,
                             Class<?> elem)
        Helper method to return the given collection as an array.

      • isPrimitiveDefault

        public static boolean isPrimitiveDefault​(Object o,
                                         int typeCode)
        Determine whether or not the provided Object value is the default for the provided typeCode. For example: If o = Integer(0) and typeCode = JavaTypes.INT, this method will return true.