io.prestosql.operator.scalar

Interface JsonExtract.JsonExtractor<T>

All Known Implementing Classes:

JsonExtract.JsonSizeExtractor, JsonExtract.JsonValueJsonExtractor, JsonExtract.ObjectFieldJsonExtractor, JsonExtract.ScalarValueJsonExtractor

Enclosing class:

JsonExtract

public static interface JsonExtract.JsonExtractor<T>

Method Summary

Modifier and Type	Method and Description
T	extract(com.fasterxml.jackson.core.JsonParser jsonParser) Executes the extraction on the existing content of the JsonParser and outputs the match.

Method Detail

extract

T extract(com.fasterxml.jackson.core.JsonParser jsonParser)
   throws IOException

Executes the extraction on the existing content of the JsonParser and outputs the match.

Notes:

• JsonParser must be on the FIRST token of the value to be processed when extract is called
• INVARIANT: when extract() returns, the current token of the parser will be the LAST token of the value

Returns:

the value, or null if not applicable

Throws:

IOException