org.delia.util

Class DValueHelper

java.lang.Object

org.delia.util.DValueHelper

public class DValueHelper
extends Object

Constructor Summary

Constructors

Constructor and Description
DValueHelper()

Method Summary

Modifier and Type	Method and Description
static DValue	cloneField(DValue inner)
static boolean	fieldExists(DType dtype, String fieldName)
static List<TypePair>	findAllUniqueFieldPair(DType inner)
static TypePair	findField(DType dtype, String fieldName)
static DType	findFieldType(DType dtype, String fieldName)
static String	findMatchingRelation(DStructType dtype, DStructType relType)
static TypePair	findPrimaryKeyFieldPair(DType inner)
static String	findUniqueField(DType inner)
static DType	findUniqueFieldType(DType inner)
static DValue	getFieldValue(DValue dval, String fieldName)
static DValue	mergeOne(DValue dvalPartial, DValue existingDVal) Return a new DValue that combines dvalPartial into existingDVal
static void	throwIfFieldNotExist(String msgPrefix, String fieldName, DValue dval)
static boolean	typeHasSerialPrimaryKey(DType dtype)

Methods inherited from class java.lang.Object

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

Constructor Detail

DValueHelper

public DValueHelper()

Method Detail

findUniqueField

public static String findUniqueField(DType inner)

findPrimaryKeyFieldPair

public static TypePair findPrimaryKeyFieldPair(DType inner)

findAllUniqueFieldPair

public static List<TypePair> findAllUniqueFieldPair(DType inner)

findFieldType

public static DType findFieldType(DType dtype,
                                  String fieldName)

findField

public static TypePair findField(DType dtype,
                                 String fieldName)

fieldExists

public static boolean fieldExists(DType dtype,
                                  String fieldName)

findUniqueFieldType

public static DType findUniqueFieldType(DType inner)

getFieldValue

public static DValue getFieldValue(DValue dval,
                                   String fieldName)

mergeOne

public static DValue mergeOne(DValue dvalPartial,
                              DValue existingDVal)

Return a new DValue that combines dvalPartial into existingDVal

Parameters:

dvalPartial - value contains some of the type's fields

existingDVal - DValue that we are merging into

Returns:

new value

cloneField

public static DValue cloneField(DValue inner)

findMatchingRelation

public static String findMatchingRelation(DStructType dtype,
                                          DStructType relType)

throwIfFieldNotExist

public static void throwIfFieldNotExist(String msgPrefix,
                                        String fieldName,
                                        DValue dval)

typeHasSerialPrimaryKey

public static boolean typeHasSerialPrimaryKey(DType dtype)