com.epimorphics.converters

Interface RawDataSource

All Superinterfaces:

Iterable<Map<String,Object>>, Iterator<Map<String,Object>>

All Known Implementing Classes:

CSVDataSource

public interface RawDataSource
extends Iterable<Map<String,Object>>, Iterator<Map<String,Object>>

Data stream to be converted by some DataConverter. Current abstraction is of a series of records each of which has a set of named fields. The field values are unconstrained and in particular may include structured values reported as Maps. Simple field values will be reported boxed as Value instances. Experimental - only suited to tabluar structure data.

Author:

Dave Reynolds

Field Summary

Fields

Modifier and Type	Field and Description
static String	INDEX variable name under which the index of the row will be bound in the environment
static String	ROW variable name under which the row of data will be bound in the environment

Method Summary

Modifier and Type	Method and Description
List<String>	getFieldNames() Return the set of top level field names in each record
boolean	hasNext() Return true if more record values are available.
Iterator<Map<String,Object>>	iterator() Return itself as an iterator
Map<String,Object>	next() Return the next record value.
long	size() Return the total number of rows in the source or -1 if this information is not available

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Field Detail

ROW

static final String ROW

variable name under which the row of data will be bound in the environment

See Also:

Constant Field Values

INDEX

static final String INDEX

variable name under which the index of the row will be bound in the environment

See Also:

Constant Field Values

Method Detail

getFieldNames

List<String> getFieldNames()

Return the set of top level field names in each record

hasNext

boolean hasNext()

Return true if more record values are available.

Specified by:

hasNext in interface Iterator<Map<String,Object>>

next

Map<String,Object> next()

Return the next record value.

Specified by:

next in interface Iterator<Map<String,Object>>

iterator

Iterator<Map<String,Object>> iterator()

Return itself as an iterator

Specified by:

iterator in interface Iterable<Map<String,Object>>

size

long size()

Return the total number of rows in the source or -1 if this information is not available