All Known Subinterfaces:

DBCallback

All Known Implementing Classes:

BasicBSONCallback, DefaultDBCallback, EmptyBSONCallback, JSONCallback, LazyBSONCallback, LazyDBCallback
```
public interface BSONCallback
```
A callback interface for describing the structure of a BSON document. Implementations of this define how to turn BSON read from MongoDB into Java objects. See the BSON Spec.

Method Summary

All Methods Instance Methods Abstract Methods Deprecated Methods
Modifier and Type	Method	Description
`Object`	`arrayDone()`	Called the end of the array, and returns the completed array.
`void`	`arrayStart()`	Signals the start of a BSON array.
`void`	`arrayStart(String name)`	Signals the start of a BSON array, with its field name.
`BSONCallback`	`createBSONCallback()`	Factory method for BSONCallbacks.
`Object`	`get()`	Returns the finished top-level Document.
`void`	`gotBinary(String name, byte type, byte[] data)`	Called when reading a field with a `BsonType.BINARY` value.
`void`	`gotBinaryArray(String name, byte[] data)`	Deprecated. this method is no longer called by the decoder
`void`	`gotBoolean(String name, boolean value)`	Called when reading a field with a `BsonType.BOOLEAN` value.
`void`	`gotCode(String name, String code)`	Called when reading a field with a `BsonType.JAVASCRIPT` value.
`void`	`gotCodeWScope(String name, String code, Object scope)`	Called when reading a field with a `BsonType.JAVASCRIPT_WITH_SCOPE` value.
`void`	`gotDate(String name, long millis)`	Called when reading a field with a `BsonType.DATE_TIME` value.
`void`	`gotDBRef(String name, String namespace, ObjectId id)`	Invoked when `BSONDecoder` encountered a `BsonType.DB_POINTER` type field in a byte sequence.
`void`	`gotDecimal128(String name, Decimal128 value)`	Called when reading a field with a `BsonType.DECIMAL128` value.
`void`	`gotDouble(String name, double value)`	Called when reading a field with a `BsonType.DOUBLE` value.
`void`	`gotInt(String name, int value)`	Called when reading a field with a `BsonType.INT32` value.
`void`	`gotLong(String name, long value)`	Called when reading a field with a `BsonType.INT64` value.
`void`	`gotMaxKey(String name)`	Called when reading a field with a `BsonType.MAX_KEY` value.
`void`	`gotMinKey(String name)`	Called when reading a field with a `BsonType.MIN_KEY` value.
`void`	`gotNull(String name)`	Called when reading a BSON field that exists but has a null value.
`void`	`gotObjectId(String name, ObjectId id)`	Called when reading a field with a `BsonType.OBJECT_ID` value.
`void`	`gotRegex(String name, String pattern, String flags)`	Called when reading a field with a `BsonType.REGULAR_EXPRESSION` value.
`void`	`gotString(String name, String value)`	Called when reading a field with a `BsonType.STRING` value.
`void`	`gotSymbol(String name, String value)`	Called when reading a field with a `BsonType.SYMBOL` value.
`void`	`gotTimestamp(String name, int time, int increment)`	Called when reading a field with a `BsonType.TIMESTAMP` value.
`void`	`gotUndefined(String name)`	Called when reading a field with a `BsonType.UNDEFINED` value.
`void`	`gotUUID(String name, long part1, long part2)`	Called when reading a field with a `UUID` value.
`Object`	`objectDone()`	Called at the end of the document/array, and returns this object.
`void`	`objectStart()`	Signals the start of a BSON document, which usually maps onto some Java object.
`void`	`objectStart(String name)`	Signals the start of a BSON document, which usually maps onto some Java object.
`void`	`reset()`	Resets the callback, clearing all state.

- Method Detail
  - objectStart
```
void objectStart()
```
    Signals the start of a BSON document, which usually maps onto some Java object.
    
    MongoDB documentation
    MongoDB Documents
  - objectStart
```
void objectStart(String name)
```
    Signals the start of a BSON document, which usually maps onto some Java object.
    
    Parameters:
    
    name - the field name of the document.
    
    MongoDB documentation
    MongoDB Documents
  - objectDone
```
Object objectDone()
```
    Called at the end of the document/array, and returns this object.
    
    Returns:
    
    the Object that has been read from this section of the document.
  - reset
```
void reset()
```
    Resets the callback, clearing all state.
  - get
```
Object get()
```
    Returns the finished top-level Document.
    
    Returns:
    
    the top level document read from the database.
  - createBSONCallback
```
BSONCallback createBSONCallback()
```
    Factory method for BSONCallbacks.
    
    Returns:
    
    a new BSONCallback.
  - arrayStart
```
void arrayStart()
```
    Signals the start of a BSON array.
    
    MongoDB documentation
    Arrays
  - arrayStart
```
void arrayStart(String name)
```
    Signals the start of a BSON array, with its field name.
    
    Parameters:
    
    name - the name of this array field
    
    MongoDB documentation
    Arrays
  - arrayDone
```
Object arrayDone()
```
    Called the end of the array, and returns the completed array.
    
    Returns:
    
    an Object representing the array that has been read from this section of the document.
  - gotNull
```
void gotNull(String name)
```
    Called when reading a BSON field that exists but has a null value.
    
    Parameters:
    
    name - the name of the field
    
    See Also:
    
    BsonType.NULL
  - gotUndefined
```
void gotUndefined(String name)
```
    Called when reading a field with a BsonType.UNDEFINED value.
    
    Parameters:
    
    name - the name of the field
    
    See Also:
    
    BsonType.UNDEFINED
  - gotMinKey
```
void gotMinKey(String name)
```
    Called when reading a field with a BsonType.MIN_KEY value.
    
    Parameters:
    
    name - the name of the field
  - gotMaxKey
```
void gotMaxKey(String name)
```
    Called when reading a field with a BsonType.MAX_KEY value.
    
    Parameters:
    
    name - the name of the field
  - gotBoolean
```
void gotBoolean(String name,
                boolean value)
```
    Called when reading a field with a BsonType.BOOLEAN value.
    
    Parameters:
    
    name - the name of the field
    
    value - the field's value
  - gotDouble
```
void gotDouble(String name,
               double value)
```
    Called when reading a field with a BsonType.DOUBLE value.
    
    Parameters:
    
    name - the name of the field
    
    value - the field's value
  - gotDecimal128
```
void gotDecimal128(String name,
                   Decimal128 value)
```
    Called when reading a field with a BsonType.DECIMAL128 value.
    
    Parameters:
    
    name - the field name
    
    value - the Decimal128 field value
    
    Since:
    
    3.4
    
    Since server release
    3.4
  - gotInt
```
void gotInt(String name,
            int value)
```
    Called when reading a field with a BsonType.INT32 value.
    
    Parameters:
    
    name - the name of the field
    
    value - the field's value
  - gotLong
```
void gotLong(String name,
             long value)
```
    Called when reading a field with a BsonType.INT64 value.
    
    Parameters:
    
    name - the name of the field
    
    value - the field's value
  - gotDate
```
void gotDate(String name,
             long millis)
```
    Called when reading a field with a BsonType.DATE_TIME value.
    
    Parameters:
    
    name - the name of the field
    
    millis - the date and time in milliseconds
  - gotString
```
void gotString(String name,
               String value)
```
    Called when reading a field with a BsonType.STRING value.
    
    Parameters:
    
    name - the name of the field
    
    value - the field's value
  - gotSymbol
```
void gotSymbol(String name,
               String value)
```
    Called when reading a field with a BsonType.SYMBOL value.
    
    Parameters:
    
    name - the name of the field
    
    value - the field's value
  - gotRegex
```
void gotRegex(String name,
              String pattern,
              String flags)
```
    Called when reading a field with a BsonType.REGULAR_EXPRESSION value.
    
    Parameters:
    
    name - the name of the field
    
    pattern - the regex pattern
    
    flags - the optional flags for the regular expression
    
    MongoDB documentation
    $regex
  - gotTimestamp
```
void gotTimestamp(String name,
                  int time,
                  int increment)
```
    Called when reading a field with a BsonType.TIMESTAMP value.
    
    Parameters:
    
    name - the name of the field
    
    time - the time in seconds since epoch
    
    increment - an incrementing ordinal for operations within a given second
    
    MongoDB documentation
    Timestamps
  - gotObjectId
```
void gotObjectId(String name,
                 ObjectId id)
```
    Called when reading a field with a BsonType.OBJECT_ID value.
    
    Parameters:
    
    name - the name of the field
    
    id - the object ID
  - gotDBRef
```
void gotDBRef(String name,
              String namespace,
              ObjectId id)
```
    Invoked when BSONDecoder encountered a BsonType.DB_POINTER type field in a byte sequence.
    
    Parameters:
    
    name - the name of the field
    
    namespace - the namespace to which reference is pointing to
    
    id - the if of the object to which reference is pointing to
  - gotBinaryArray
```
@Deprecated
void gotBinaryArray(String name,
                    byte[] data)
```
    Deprecated. this method is no longer called by the decoder
    
    This method is not used.
    
    Parameters:
    
    name - the name of the field
    
    data - the field's value
  - gotBinary
```
void gotBinary(String name,
               byte type,
               byte[] data)
```
    Called when reading a field with a BsonType.BINARY value. Note that binary values have a subtype, which may determine how the value is processed.
    
    Parameters:
    
    name - the name of the field
    
    type - one of the binary subtypes: BsonBinarySubType
    
    data - the field's value
  - gotUUID
```
void gotUUID(String name,
             long part1,
             long part2)
```
    Called when reading a field with a UUID value. This is a binary value of subtype BsonBinarySubType.UUID_LEGACY
    
    Parameters:
    
    name - the name of the field
    
    part1 - the first part of the UUID
    
    part2 - the second part of the UUID
  - gotCode
```
void gotCode(String name,
             String code)
```
    Called when reading a field with a BsonType.JAVASCRIPT value.
    
    Parameters:
    
    name - the name of the field
    
    code - the JavaScript code
  - gotCodeWScope
```
void gotCodeWScope(String name,
                   String code,
                   Object scope)
```
    Called when reading a field with a BsonType.JAVASCRIPT_WITH_SCOPE value.
    
    Parameters:
    
    name - the name of the field
    
    code - the JavaScript code
    
    scope - a document representing the scope for the code

Interface BSONCallback

Method Summary

Method Detail

objectStart

objectStart

objectDone

reset

get

createBSONCallback

arrayStart

arrayStart

arrayDone

gotNull

gotUndefined

gotMinKey

gotMaxKey

gotBoolean

gotDouble

gotDecimal128

gotInt

gotLong

gotDate

gotString

gotSymbol

gotRegex

gotTimestamp

gotObjectId

gotDBRef

gotBinaryArray

gotBinary

gotUUID

gotCode

gotCodeWScope