FlexObjectConverter (objectbox-java 3.2.1 API)

java.lang.Object
- io.objectbox.converter.FlexObjectConverter

All Implemented Interfaces:

io.objectbox.converter.PropertyConverter<java.lang.Object,byte[]>

Direct Known Subclasses:

IntegerFlexMapConverter, LongFlexMapConverter, StringFlexMapConverter
```
public class FlexObjectConverter
extends java.lang.Object
implements io.objectbox.converter.PropertyConverter<java.lang.Object,byte[]>
```
Converts between Object properties and byte arrays using FlexBuffers.
Types are limited to those supported by FlexBuffers, including that map keys must be String. (There are subclasses available that auto-convert Integer and Long key maps, see convertToKey(java.lang.String).)
If any item requires 64 bits for storage in the FlexBuffers Map/Vector (a large Long, a Double) all integers are restored as Long, otherwise Integer. So e.g. when storing only a Long value of 1L, the value restored from the database will be of type Integer. (There are subclasses available that always restore as Long, see shouldRestoreAsLong(io.objectbox.flatbuffers.FlexBuffers.Reference).)
Values of type Float are always restored as Double. Cast to Float to obtain the original value.

Constructor Summary

Constructors
Constructor Description

FlexObjectConverter()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`checkMapKeyType(java.lang.Object rawKey)`	Checks Java map key is of the expected type, otherwise throws.
`byte[]`	`convertToDatabaseValue(java.lang.Object value)`
`java.lang.Object`	`convertToEntityProperty(byte[] databaseValue)`
`protected boolean`	`shouldRestoreAsLong(FlexBuffers.Reference reference)`	Returns true if the width in bytes stored in the private parentWidth field of FlexBuffers.Reference is 8.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FlexObjectConverter
```
public FlexObjectConverter()
```
- Method Detail
  - convertToDatabaseValue
```
public byte[] convertToDatabaseValue(java.lang.Object value)
```
    Specified by:
    
    convertToDatabaseValue in interface io.objectbox.converter.PropertyConverter<java.lang.Object,byte[]>
  - checkMapKeyType
```
protected void checkMapKeyType(java.lang.Object rawKey)
```
    Checks Java map key is of the expected type, otherwise throws.
  - convertToEntityProperty
```
public java.lang.Object convertToEntityProperty(byte[] databaseValue)
```
    Specified by:
    
    convertToEntityProperty in interface io.objectbox.converter.PropertyConverter<java.lang.Object,byte[]>
  - shouldRestoreAsLong
```
protected boolean shouldRestoreAsLong(FlexBuffers.Reference reference)
```
    Returns true if the width in bytes stored in the private parentWidth field of FlexBuffers.Reference is 8. Note: FlexBuffers stores all items in a map/vector using the size of the widest item. However, an item's size is only as wide as needed, e.g. a 64-bit integer (Java Long, 8 bytes) will be reduced to 1 byte if it does not exceed its value range.