Package org.apache.tika.serialization

Class MetadataValueTypes

java.lang.Object

org.apache.tika.serialization.MetadataValueTypes

public final class MetadataValueTypes
extends Object

Value types of metadata keys for typed JSON output.

The Property registry knows a key only once its declaring class has loaded in this JVM. A pipes parent (tika-server's /rmeta, for one) serializes metadata from parsers and plugins it never loads, so the fork reports the types of the keys it wrote (describe(java.util.List<org.apache.tika.metadata.Metadata>)) and the parent records them (learn(java.lang.String, java.lang.String)) before serializing.

Method Summary

Modifier and Type	Method	Description
static Map<String,Property.ValueType>	describe(List<Metadata> metadataList)
static Property.ValueType	get(String key)
static void	learn(String key, String typeName)	Records a type reported by a fork.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

get

public static Property.ValueType get(String key)

Returns:

the key's type from its Property declaration in this JVM, else as reported by a fork, else null

describe

public static Map<String,Property.ValueType> describe(List<Metadata> metadataList)

Returns:

the keys in the list that typed output writes as other than strings, with their types

learn

public static void learn(String key,
 String typeName)

Records a type reported by a fork. Ignored when this JVM declares the key itself, the key was already learned, the type name is unknown or written as a string, or the cap is reached.