public class SpecificData extends GenericData
Modifier and Type | Class and Description |
---|---|
static interface |
SpecificData.SchemaConstructable
Tag interface that indicates that a class has a one-argument constructor that
accepts a Schema.
|
GenericData.Array<T>, GenericData.EnumSymbol, GenericData.Fixed, GenericData.InstanceSupplier, GenericData.Record, GenericData.StringType
Modifier and Type | Field and Description |
---|---|
static String |
CLASS_PROP |
static String |
ELEMENT_PROP |
static String |
KEY_CLASS_PROP |
static Set<String> |
RESERVED_WORDS
List of Java reserved words from
https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-3.9 combined
with the boolean and null literals.
|
protected Set<Class> |
stringableClasses
Read/write some common builtin classes as strings.
|
FAST_READER_PROP, STRING_PROP, STRING_TYPE_STRING
Constructor and Description |
---|
SpecificData()
For subclasses.
|
SpecificData(ClassLoader classLoader)
Construct with a specific classloader.
|
Modifier and Type | Method and Description |
---|---|
protected int |
compare(Object o1,
Object o2,
Schema s,
boolean eq)
Comparison implementation.
|
DatumReader |
createDatumReader(Schema schema)
Returns a
DatumReader for this kind of data. |
DatumReader |
createDatumReader(Schema writer,
Schema reader)
Returns a
DatumReader for this kind of data. |
DatumWriter |
createDatumWriter(Schema schema)
Returns a
DatumWriter for this kind of data. |
Object |
createEnum(String symbol,
Schema schema)
Called to create an enum value.
|
Object |
createFixed(Object old,
Schema schema)
Called to create an fixed value.
|
protected Schema |
createSchema(Type type,
Map<String,Schema> names)
Create the schema for a Java type.
|
Object |
createString(Object value)
Called to create an string value.
|
static SpecificData |
get()
Return the singleton instance.
|
Class |
getClass(Schema schema)
Return the class that implements a schema, or null if none exists.
|
static String |
getClassName(Schema schema)
Returns the Java class name indicated by a schema's name and namespace.
|
static BinaryDecoder |
getDecoder(ObjectInput in)
Runtime utility used by generated classes.
|
static BinaryEncoder |
getEncoder(ObjectOutput out)
Runtime utility used by generated classes.
|
protected Schema |
getEnumSchema(Object datum)
Called to obtain the schema of a enum.
|
static <T> SpecificData |
getForClass(Class<T> c)
If the given class is assignable to
SpecificRecordBase , this method
returns the SpecificData instance from the field MODEL$ , in order to
get the correct Conversion instances for the class. |
static SpecificData |
getForSchema(Schema reader)
For RECORD type schemas, this method returns the SpecificData instance of the
class associated with the schema, in order to get the right conversions for
any logical types used.
|
GenericData.InstanceSupplier |
getNewRecordSupplier(Schema schema)
create a supplier that allows to get new record instances for a given schema
in an optimized way
|
Protocol |
getProtocol(Class iface)
Return the protocol for a Java interface.
|
Schema |
getSchema(Type type)
Find the schema for a Java type.
|
protected String |
getSchemaName(Object datum)
Return the schema full name for a datum.
|
protected boolean |
isEnum(Object datum)
Called by the default implementation of
GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object) . |
protected boolean |
isStringable(Class<?> c)
True if a class should be serialized with toString().
|
protected boolean |
isStringType(Class<?> c)
True if a class IS a string type
|
static Object |
newInstance(Class c,
Schema s)
Create an instance of a class.
|
Object |
newRecord(Object old,
Schema schema)
Called to create new record instances.
|
void |
setCustomCoders(boolean flag)
Dynamically set the value of the custom-coder feature flag.
|
boolean |
useCustomCoders()
Retrieve the current value of the custom-coders feature flag.
|
addLogicalTypeConversion, compare, createFixed, deepCopy, getArrayAsCollection, getClassLoader, getConversionByClass, getConversionByClass, getConversionFor, getConversions, getDefaultValue, getFastReaderBuilder, getField, getField, getFixedSchema, getRecordSchema, getRecordState, hashCode, hashCodeAdd, induce, instanceOf, isArray, isBoolean, isBytes, isDouble, isFastReaderEnabled, isFixed, isFloat, isInteger, isLong, isMap, isRecord, isString, newArray, newMap, resolveUnion, setFastReaderEnabled, setField, setField, setStringType, toString, toString, validate
public static final String CLASS_PROP
public static final String KEY_CLASS_PROP
public static final String ELEMENT_PROP
public static final Set<String> RESERVED_WORDS
protected Set<Class> stringableClasses
public SpecificData()
get()
.public SpecificData(ClassLoader classLoader)
public DatumReader createDatumReader(Schema schema)
GenericData
DatumReader
for this kind of data.createDatumReader
in class GenericData
public DatumReader createDatumReader(Schema writer, Schema reader)
GenericData
DatumReader
for this kind of data.createDatumReader
in class GenericData
public DatumWriter createDatumWriter(Schema schema)
GenericData
DatumWriter
for this kind of data.createDatumWriter
in class GenericData
public static SpecificData get()
public static SpecificData getForSchema(Schema reader)
reader
- the reader schemapublic static <T> SpecificData getForClass(Class<T> c)
SpecificRecordBase
, this method
returns the SpecificData instance from the field MODEL$
, in order to
get the correct Conversion
instances for the class.
Falls back to the default instance get()
for other
classes or if the field is not found.T
- .c
- A classpublic boolean useCustomCoders()
true
, but this default can be overriden using the system
property org.apache.avro.specific.use_custom_coders
, and can be
set dynamically by useCustomCoders()
. See for more about this feature flag.public void setCustomCoders(boolean flag)
useCustomCoders()
.protected boolean isEnum(Object datum)
GenericData
GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object)
.isEnum
in class GenericData
public Object createEnum(String symbol, Schema schema)
GenericData
createEnum
in class GenericData
protected Schema getEnumSchema(Object datum)
GenericData
getEnumSchema
in class GenericData
public Class getClass(Schema schema)
public static String getClassName(Schema schema)
protected Schema createSchema(Type type, Map<String,Schema> names)
protected String getSchemaName(Object datum)
GenericData
GenericData.resolveUnion(Schema,Object)
.getSchemaName
in class GenericData
protected boolean isStringable(Class<?> c)
protected boolean isStringType(Class<?> c)
protected int compare(Object o1, Object o2, Schema s, boolean eq)
GenericData
compare
in class GenericData
public static Object newInstance(Class c, Schema s)
SpecificData.SchemaConstructable
, call a constructor with a
Schema
parameter, otherwise use a no-arg constructor.public Object createFixed(Object old, Schema schema)
GenericData
GenericFixed
.createFixed
in class GenericData
public Object newRecord(Object old, Schema schema)
GenericData
GenericData.Record
.newRecord
in class GenericData
public GenericData.InstanceSupplier getNewRecordSupplier(Schema schema)
GenericData
getNewRecordSupplier
in class GenericData
public static BinaryDecoder getDecoder(ObjectInput in)
public static BinaryEncoder getEncoder(ObjectOutput out)
public Object createString(Object value)
GenericData
createString
in class GenericData
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