org.openjdk.jmc.flightrecorder.rules.jdk.util

Interface IItemResultSet

public interface IItemResultSet

Provides a simple ResultSet abstraction for item queries.

Method Summary

Modifier and Type	Method and Description
Map<String,ColumnInfo>	getColumnMetadata() Returns the column metadata for the result set.
IItemQuery	getQuery() Returns the query used to create the result set.
Object	getValue(int column) Returns the value for the specified column, at the current row.
boolean	next() Advances the cursor to the next row in the result set.

Method Detail

getQuery

IItemQuery getQuery()

Returns the query used to create the result set.

Returns:

the query used to create the result set.

getValue

Object getValue(int column)
         throws ItemResultSetException

Returns the value for the specified column, at the current row.

Parameters:

column - the column for which to return the value.

Returns:

value for the specified column, at the current row.

Throws:

ItemResultSetException - if there was a problem reading the value, such as the cursor not being at a value, the column not existing etc.

getColumnMetadata

Map<String,ColumnInfo> getColumnMetadata()

Returns the column metadata for the result set. Useful for finding out what column an attribute or an aggregator is mapping to.

Returns:

the column metadata.

next

boolean next()

Advances the cursor to the next row in the result set. Returns true if there is still more rows, and false if the end has been reached.

Returns:

true if there is still more rows, and false if the end has been reached.