org.dizitart.no2.util

Class DocumentUtils

java.lang.Object

org.dizitart.no2.util.DocumentUtils

public final class DocumentUtils
extends java.lang.Object

A utility class for Document.

Since:

1.0

Method Summary

Modifier and Type	Method and Description
static Filter	createUniqueFilter(Document document) Create unique filter to identify the document.
static <T> Document	emptyDocument(NitriteMapper nitriteMapper, java.lang.Class<T> type) Creates an empty document from a Class definition.
static java.util.Set<java.lang.String>	getFields(Document document) Gets all first level fields of a document.
static java.lang.Object	getFieldValue(Document document, java.lang.String field) Gets the value of a value inside a document.
static boolean	isRecent(Document recent, Document older) Determines whether a document has recently been updated/created than the other.

Methods inherited from class java.lang.Object

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

Method Detail

getFields

public static java.util.Set<java.lang.String> getFields(Document document)

Gets all first level fields of a document.

Parameters:

document - the document.

Returns:

the fields of the document.

getFieldValue

public static java.lang.Object getFieldValue(Document document,
                                             java.lang.String field)

Gets the value of a value inside a document.

Parameters:

document - the document

field - the value

Returns:

the value of the value.

emptyDocument

public static <T> Document emptyDocument(NitriteMapper nitriteMapper,
                                         java.lang.Class<T> type)

Creates an empty document from a Class definition. All value values are initialized to null. Such empty document is used for projection purpose.

Type Parameters:

T - the type parameter

Parameters:

nitriteMapper - the NitriteMapper to create the document.

type - the class definition.

Returns:

the empty document

isRecent

public static boolean isRecent(Document recent,
                               Document older)

Determines whether a document has recently been updated/created than the other.

Parameters:

recent - the recent document

older - the older document

Returns:

the boolean value

createUniqueFilter

public static Filter createUniqueFilter(Document document)

Create unique filter to identify the document.

Parameters:

document - the document

Returns:

the unique filter