com.couchbase.lite

Class Document

java.lang.Object

com.couchbase.lite.Document

All Implemented Interfaces:

DictionaryInterface, Iterable<String>

Direct Known Subclasses:

MutableDocument

public class Document
extends Object
implements DictionaryInterface, Iterable<String>

Readonly version of the Document.

Method Summary

Modifier and Type	Method and Description
boolean	contains(String key) Tests whether a property exists or not.
int	count() Gets a number of the entries in the dictionary.
boolean	equals(Object o)
Array	getArray(String key) Get a property's value as a Array, which is a mapping object of an array value.
Blob	getBlob(String key) Gets a property's value as a Blob.
boolean	getBoolean(String key) Gets a property's value as a boolean.
Date	getDate(String key) Gets a property's value as a Date.
Dictionary	getDictionary(String key) Get a property's value as a Dictionary, which is a mapping object of a Dictionary value.
double	getDouble(String key) Gets a property's value as an double.
float	getFloat(String key) Gets a property's value as an float.
String	getId() return the document's ID.
int	getInt(String key) Gets a property's value as an int.
List<String>	getKeys() Get an List containing all keys, or an empty List if the document has no properties.
long	getLong(String key) Gets a property's value as an long.
Number	getNumber(String key) Gets a property's value as a Number.
String	getRevisionID() Get the document's revision id.
long	getSequence() Return the sequence number of the document in the database.
String	getString(String key) Gets a property's value as a String.
Object	getValue(String key) Gets a property's value as an object.
int	hashCode()
Iterator<String>	iterator() Gets an iterator over the keys of the document's properties
Map<String,Object>	toMap() Gets content of the current object as an Map.
MutableDocument	toMutable() Return a mutable copy of the document
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

getId

@NonNull
public String getId()

return the document's ID.

Returns:

the document's ID

getRevisionID

@Nullable
public String getRevisionID()

Get the document's revision id. The revision id in the Document class is a constant while the revision id in the MutableDocument class is not. A newly created Document will have a null revision id. The revision id in a MutableDocument will be updated on save. The revision id format is opaque, which means its format has no meaning and shouldn't be parsed to get information.

Returns:

the document's revision id

getSequence

public long getSequence()

Return the sequence number of the document in the database. The sequence number indicates how recently the document has been changed. Every time a document is updated, the database assigns it the next sequential sequence number. Thus, when a document's sequence number changes it means that the document been update (on-disk). If one document's sequence is different than another's, the document with the larger sequence number was changed more recently. Sequence numbers are not available for documents obtained from a replication filter. This method will always return 0 for such documents.

Returns:

the sequence number of the document in the database.

toMutable

@NonNull
public MutableDocument toMutable()

Return a mutable copy of the document

Returns:

the MutableDocument instance

count

public int count()

Gets a number of the entries in the dictionary.

Specified by:

count in interface DictionaryInterface

Returns:

the number of entries in the dictionary.

getKeys

@NonNull
public List<String> getKeys()

Get an List containing all keys, or an empty List if the document has no properties.

Specified by:

getKeys in interface DictionaryInterface

Returns:

all keys

getValue

@Nullable
public Object getValue(@NonNull
                                 String key)

Gets a property's value as an object. The object types are Blob, Array, Dictionary, Number, or String based on the underlying data type; or nil if the property value is null or the property doesn't exist.

Specified by:

getValue in interface DictionaryInterface

Parameters:

key - the key.

Returns:

the object value or null.

getString

@Nullable
public String getString(@NonNull
                                  String key)

Gets a property's value as a String. Returns null if the value doesn't exist, or its value is not a String.

Specified by:

getString in interface DictionaryInterface

Parameters:

key - the key

Returns:

the String or null.

getNumber

@Nullable
public Number getNumber(@NonNull
                                  String key)

Gets a property's value as a Number. Returns null if the value doesn't exist, or its value is not a Number.

Specified by:

getNumber in interface DictionaryInterface

Parameters:

key - the key

Returns:

the Number or nil.

getInt

public int getInt(@NonNull
                  String key)

Gets a property's value as an int. Floating point values will be rounded. The value `true` is returned as 1, `false` as 0. Returns 0 if the value doesn't exist or does not have a numeric value.

Specified by:

getInt in interface DictionaryInterface

Parameters:

key - the key

Returns:

the int value.

getLong

public long getLong(@NonNull
                    String key)

Gets a property's value as an long. Floating point values will be rounded. The value `true` is returned as 1, `false` as 0. Returns 0 if the value doesn't exist or does not have a numeric value.

Specified by:

getLong in interface DictionaryInterface

Parameters:

key - the key

Returns:

the long value.

getFloat

public float getFloat(@NonNull
                      String key)

Gets a property's value as an float. Integers will be converted to float. The value `true` is returned as 1.0, `false` as 0.0. Returns 0.0 if the value doesn't exist or does not have a numeric value.

Specified by:

getFloat in interface DictionaryInterface

Parameters:

key - the key

Returns:

the float value.

getDouble

public double getDouble(@NonNull
                        String key)

Gets a property's value as an double. Integers will be converted to double. The value `true` is returned as 1.0, `false` as 0.0. Returns 0.0 if the property doesn't exist or does not have a numeric value.

Specified by:

getDouble in interface DictionaryInterface

Parameters:

key - the key

Returns:

the double value.

getBoolean

public boolean getBoolean(@NonNull
                          String key)

Gets a property's value as a boolean. Returns true if the value exists, and is either `true` or a nonzero number.

Specified by:

getBoolean in interface DictionaryInterface

Parameters:

key - the key

Returns:

the boolean value.

getBlob

@Nullable
public Blob getBlob(@NonNull
                              String key)

Gets a property's value as a Blob. Returns null if the value doesn't exist, or its value is not a Blob.

Specified by:

getBlob in interface DictionaryInterface

Parameters:

key - the key

Returns:

the Blob value or null.

getDate

@Nullable
public Date getDate(@NonNull
                              String key)

Gets a property's value as a Date. JSON does not directly support dates, so the actual property value must be a string, which is then parsed according to the ISO-8601 date format (the default used in JSON.) Returns null if the value doesn't exist, is not a string, or is not parsable as a date. NOTE: This is not a generic date parser! It only recognizes the ISO-8601 format, with or without milliseconds.

Specified by:

getDate in interface DictionaryInterface

Parameters:

key - the key

Returns:

the Date value or null.

getArray

@Nullable
public Array getArray(@NonNull
                                String key)

Get a property's value as a Array, which is a mapping object of an array value. Returns null if the property doesn't exists, or its value is not an Array.

Specified by:

getArray in interface DictionaryInterface

Parameters:

key - the key

Returns:

The Array object or null.

getDictionary

@Nullable
public Dictionary getDictionary(@NonNull
                                          String key)

Get a property's value as a Dictionary, which is a mapping object of a Dictionary value. Returns null if the property doesn't exists, or its value is not a Dictionary.

Specified by:

getDictionary in interface DictionaryInterface

Parameters:

key - the key

Returns:

The Dictionary object or null.

toMap

@NonNull
public Map<String,Object> toMap()

Gets content of the current object as an Map. The values contained in the returned Map object are all JSON based values.

Specified by:

toMap in interface DictionaryInterface

Returns:

the Map object representing the content of the current object in the JSON format.

contains

public boolean contains(@NonNull
                        String key)

Tests whether a property exists or not. This can be less expensive than getValue(String), because it does not have to allocate an Object for the property value.

Specified by:

contains in interface DictionaryInterface

Parameters:

key - the key

Returns:

the boolean value representing whether a property exists or not.

iterator

@NonNull
public Iterator<String> iterator()

Gets an iterator over the keys of the document's properties

Specified by:

iterator in interface Iterable<String>

Returns:

The key iterator

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

@NonNull
public String toString()

Overrides:

toString in class Object