de.hpi.fgis.dude.datasource
Class JSONSource

java.lang.Object
  de.hpi.fgis.dude.util.AbstractCleanable
      de.hpi.fgis.dude.datasource.AbstractDataSource<JSONSource>
          de.hpi.fgis.dude.datasource.JSONSource

All Implemented Interfaces:

DataSource, Cleanable, AutoJsonable, Jsonable, JsonableReader<DuDeObject>, Closeable, Iterable<DuDeObject>

public class JSONSource
extends AbstractDataSource<JSONSource>
implements Jsonable

JSONSource represents files containing Json syntax. The underlying file should contain a Json array of Json records. Each record collects the data of one DuDeObject.

Author:

Matthias Pohl

Nested Class Summary

protected class

JSONSource.JSONSourceIterator JSONSourceIterator is used for generating DuDeObjects out of JSONSources.

Nested classes/interfaces inherited from class de.hpi.fgis.dude.datasource.AbstractDataSource

AbstractDataSource.AbstractDataSourceIterator<T extends AbstractDataSource<?>>

Constructor Summary

protected	JSONSource() Internal constructor for Jsonable deserialization.
	JSONSource(String identifier, File file) Initializes a JSONSource.

Method Summary

void	fromJson(DuDeJsonParser<?> jsonParser) Initializes the current instance using the passed DuDeJsonParser.
Iterator<DuDeObject>	iterator()
void	toJson(DuDeJsonGenerator jsonGenerator) Generates the Json code using the passed DuDeJsonGenerator.

Methods inherited from class de.hpi.fgis.dude.datasource.AbstractDataSource

addIdAttributes, autoGeneratedIds, close, equals, getExtractedRecordCount, getIdAttributes, getIdentifier, hashCode, setExtractedRecordCount, toString, withIdAttributes

Methods inherited from class de.hpi.fgis.dude.util.AbstractCleanable

cleanUp, registerCleanable, registerCloseable

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface de.hpi.fgis.dude.util.Cleanable

cleanUp, registerCleanable, registerCloseable

Constructor Detail

JSONSource

protected JSONSource()

Internal constructor for Jsonable deserialization.

JSONSource

public JSONSource(String identifier,
                  File file)
           throws FileNotFoundException

Initializes a JSONSource.

Parameters:

identifier - The identifier of the DataSource instance.

file - The file of which the data will be extracted.

Throws:

FileNotFoundException - If the passed file does not exist.

Method Detail

iterator

public Iterator<DuDeObject> iterator()

Specified by:

iterator in interface Iterable<DuDeObject>

Specified by:

iterator in class AbstractDataSource<JSONSource>

toJson

public void toJson(DuDeJsonGenerator jsonGenerator)
            throws org.codehaus.jackson.JsonGenerationException,
                   IOException

Description copied from interface: Jsonable

Generates the Json code using the passed DuDeJsonGenerator.

Specified by:

toJson in interface Jsonable

Parameters:

jsonGenerator - The DuDeJsonGenerator that is used internally.

Throws:

org.codehaus.jackson.JsonGenerationException - If an error occurs while generating the Json syntax.

IOException - If an error occurs while writing to the output.

fromJson

public void fromJson(DuDeJsonParser<?> jsonParser)
              throws org.codehaus.jackson.JsonParseException,
                     IOException

Description copied from interface: Jsonable

Initializes the current instance using the passed DuDeJsonParser.

Specified by:

fromJson in interface Jsonable

Parameters:

jsonParser - The parser that is used for extracting the data out of the Json.

Throws:

org.codehaus.jackson.JsonParseException - If an error occurs while parsing the Json.

IOException - If an error occurs while reading from the stream.