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java.lang.Objectorg.apache.avro.generic.GenericData
org.apache.avro.specific.SpecificData
org.apache.avro.reflect.ReflectData
public class ReflectData
Utilities to use existing Java classes and interfaces via reflection.
Nested Class Summary | |
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static class |
ReflectData.AllowNull
ReflectData implementation that permits null field values. |
Nested classes/interfaces inherited from class org.apache.avro.generic.GenericData |
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GenericData.Array<T>, GenericData.EnumSymbol, GenericData.Fixed, GenericData.Record |
Constructor Summary | |
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protected |
ReflectData()
|
Method Summary | |
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int |
compare(Object o1,
Object o2,
Schema s)
Compare objects according to their schema. |
protected Schema |
createFieldSchema(Field field,
Map<String,Schema> names)
Create a schema for a field. |
protected Schema |
createSchema(Type type,
Map<String,Schema> names)
Create the schema for a Java type. |
static ReflectData |
get()
Return the singleton instance. |
Class |
getClass(Schema schema)
Return the class that implements a schema, or null if none exists. |
protected static Field |
getField(Class c,
String name)
Return the named field of the provided class. |
Protocol |
getProtocol(Class iface)
Return the protocol for a Java interface. |
protected Schema |
getRecordSchema(Object record)
Called to obtain the schema of a record. |
protected boolean |
isArray(Object datum)
Called by the default implementation of GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object) . |
protected boolean |
isBytes(Object datum)
Called by the default implementation of GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object) . |
protected boolean |
isRecord(Object datum)
Called by the default implementation of GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object) . |
static Schema |
makeNullable(Schema schema)
Create and return a union of the null schema and the provided schema. |
boolean |
validate(Schema schema,
Object datum)
Returns true if a Java datum matches a schema. |
Methods inherited from class org.apache.avro.specific.SpecificData |
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getClassName, getSchema, isEnum |
Methods inherited from class org.apache.avro.generic.GenericData |
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hashCode, hashCodeAdd, induce, instanceOf, isFixed, isMap, isString, resolveUnion, toString, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected ReflectData()
Method Detail |
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public static ReflectData get()
protected boolean isRecord(Object datum)
GenericData
GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object)
.
isRecord
in class GenericData
protected boolean isArray(Object datum)
GenericData
GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object)
.
isArray
in class GenericData
protected boolean isBytes(Object datum)
GenericData
GenericData.instanceOf(org.apache.avro.Schema, java.lang.Object)
.
isBytes
in class GenericData
protected Schema getRecordSchema(Object record)
GenericData
getRecordSchema
in class GenericData
public boolean validate(Schema schema, Object datum)
GenericData
validate
in class GenericData
protected static Field getField(Class c, String name)
public Class getClass(Schema schema)
SpecificData
getClass
in class SpecificData
protected Schema createSchema(Type type, Map<String,Schema> names)
SpecificData
createSchema
in class SpecificData
public static Schema makeNullable(Schema schema)
protected Schema createFieldSchema(Field field, Map<String,Schema> names)
public Protocol getProtocol(Class iface)
Note that this requires that Paranamer is run over compiled interface declarations, since Java 6 reflection does not provide access to method parameter names. See Avro's build.xml for an example.
getProtocol
in class SpecificData
public int compare(Object o1, Object o2, Schema s)
GenericData
BinaryData.compare(byte[], int, byte[], int, Schema)
.
compare
in class SpecificData
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