com.google.appengine.api.search
Class Util

java.lang.Object
  com.google.appengine.api.search.Util

public final class Util
extends java.lang.Object

A utility class that does various checks on search and indexing parameters.

Method Summary

static <T> T	defaultIfNull(T value, T defaultValue) A helper method for overriding null values with a default value.
static boolean	equalObjects(java.lang.Object a, java.lang.Object b) A helper method for testing two objects are equal.
static java.lang.String	fieldToString(java.lang.String name, java.lang.Object value) Returns a string that allows a field value pair to be added to a debug string.
static boolean	isNullOrEmpty(java.lang.String string)
static <T> java.lang.String	iterableFieldToString(java.lang.String fieldName, java.lang.Iterable<T> objects) Returns a string which can be used to append an iterable field to a debug string.
static <T> java.lang.String	iterableToString(java.lang.Iterable<T> objects) Returns a string representation of the iterable objects.

Methods inherited from class java.lang.Object

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

Method Detail

isNullOrEmpty

public static boolean isNullOrEmpty(java.lang.String string)

Returns:

whether or not the string is null or empty

equalObjects

public static boolean equalObjects(java.lang.Object a,
                                   java.lang.Object b)

A helper method for testing two objects are equal.

Returns:

whether the two objects a and b are equal

defaultIfNull

public static <T> T defaultIfNull(T value,
                                  T defaultValue)

A helper method for overriding null values with a default value.

Parameters:

value - the value of some field

defaultValue - the default value for the field

Returns:

value if it is not null, otherwise the defaultValue

iterableToString

public static <T> java.lang.String iterableToString(java.lang.Iterable<T> objects)

Returns a string representation of the iterable objects. This is used in debugging.

iterableFieldToString

public static <T> java.lang.String iterableFieldToString(java.lang.String fieldName,
                                                         java.lang.Iterable<T> objects)

Returns a string which can be used to append an iterable field to a debug string.

fieldToString

public static java.lang.String fieldToString(java.lang.String name,
                                             java.lang.Object value)

Returns a string that allows a field value pair to be added to a debug string.