Package org.vast.swe.fast

Class JsonDataParserGson

java.lang.Object

org.vast.swe.fast.DataBlockProcessor

org.vast.swe.fast.AbstractDataParser

org.vast.swe.fast.JsonDataParserGson

All Implemented Interfaces:

DataComponentVisitor, DataStreamParser

Direct Known Subclasses:

JsonArrayDataParserGson

public class JsonDataParserGson
extends AbstractDataParser

New implementation of JSON data parser with better efficiency since the read tree is pre-computed during init instead of being re-evaluated while iterating through the component tree.

This particular implementation is based on Gson JsonReader.

Since:

Jan 26, 2021

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	JsonDataParserGson.ArrayReader
protected class	JsonDataParserGson.BooleanReader
protected class	JsonDataParserGson.ChoiceReader
protected class	JsonDataParserGson.DoubleReader
protected class	JsonDataParserGson.GeometryReader
protected class	JsonDataParserGson.IntegerReader
protected class	JsonDataParserGson.IsoDateTimeReader
protected static interface	JsonDataParserGson.JsonAtomReader
protected class	JsonDataParserGson.RangeReader
protected class	JsonDataParserGson.RecordReader
protected class	JsonDataParserGson.StringReader
protected class	JsonDataParserGson.ValueReader

Nested classes/interfaces inherited from class org.vast.swe.fast.DataBlockProcessor

DataBlockProcessor.ArrayProcessor, DataBlockProcessor.ArraySizeSupplier, DataBlockProcessor.AtomProcessor, DataBlockProcessor.BaseProcessor, DataBlockProcessor.ChoiceProcessor, DataBlockProcessor.CompositeProcessor, DataBlockProcessor.ImplicitSizeProcessor, DataBlockProcessor.RecordProcessor

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<String,JsonDataParserGson.IntegerReader>	countReaders
protected boolean	hasJsonArrayWrapper
protected boolean	multipleRecords
protected com.google.gson.stream.JsonReader	reader

Fields inherited from class org.vast.swe.fast.AbstractDataParser

INVALID_ARRAY_SIZE_MSG, INVALID_BOOLEAN_MSG, INVALID_CHOICE_MSG, INVALID_DECIMAL_MSG, INVALID_INTEGER_MSG

Fields inherited from class org.vast.swe.fast.DataBlockProcessor

dataComponents, enableSubTree, filter, hasVarSizeArray, processorStack, processorTreeReady, rootProcessor

Constructor Summary

Constructors

Constructor	Description
JsonDataParserGson()
JsonDataParserGson(com.google.gson.stream.JsonReader reader)

Method Summary

Modifier and Type	Method	Description
void	close()
protected DataBlockProcessor.ArrayProcessor	getArrayProcessor(DataArray array)
protected DataBlockProcessor.ArraySizeSupplier	getArraySizeSupplier(String refId)
protected DataBlockProcessor.ChoiceProcessor	getChoiceProcessor(DataChoice choice)
protected DataBlockProcessor.ImplicitSizeProcessor	getImplicitSizeProcessor(DataArray array)
protected DataBlockProcessor.AtomProcessor	getRangeProcessor(RangeComponent range)
protected DataBlockProcessor.RecordProcessor	getRecordProcessor(DataRecord record)
protected DataBlockProcessor.RecordProcessor	getVectorProcessor(Vector vect)
protected void	init()
protected boolean	moreData()
DataBlock	parseNextBlock()
void	reset()
void	setHasArrayWrapper()
void	setInput(InputStream is)
void	visit(Boolean comp)
void	visit(Category comp)
void	visit(Count comp)
void	visit(GeometryData geom)
void	visit(Quantity comp)
void	visit(Text comp)
void	visit(Time comp)

Methods inherited from class org.vast.swe.fast.AbstractDataParser

getDataEncoding, getDataHandler, getErrorHandler, getNextDataBlock, getRawDataHandler, parse, parse, parse, setDataEncoding, setDataHandler, setErrorHandler, setParentArray, setRawDataHandler, setRenewDataBlock, stop, updateArraySize

Methods inherited from class org.vast.swe.fast.DataBlockProcessor

addToProcessorTree, checkEnabled, getDataComponents, setDataComponentFilter, setDataComponents, setEnabled, visit, visit, visit, visit, visit, visit, visit, visit, visitRange

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.vast.cdm.common.DataStreamParser

getDataComponents, setDataComponents

Field Details

reader

protected com.google.gson.stream.JsonReader reader

multipleRecords

protected boolean multipleRecords

countReaders

protected Map<String,JsonDataParserGson.IntegerReader> countReaders

hasJsonArrayWrapper

protected boolean hasJsonArrayWrapper

Constructor Details

JsonDataParserGson

public JsonDataParserGson()

JsonDataParserGson

public JsonDataParserGson(com.google.gson.stream.JsonReader reader)

Method Details

init

protected void init()
             throws IOException

Specified by:

init in class DataBlockProcessor

Throws:

IOException

setInput

public void setInput(InputStream is)
              throws IOException

Throws:

IOException

setHasArrayWrapper

public void setHasArrayWrapper()

parseNextBlock

public DataBlock parseNextBlock()
                         throws IOException

Specified by:

parseNextBlock in interface DataStreamParser

Overrides:

parseNextBlock in class AbstractDataParser

Throws:

IOException

close

public void close()
           throws IOException

Throws:

IOException

reset

public void reset()

Specified by:

reset in interface DataStreamParser

Overrides:

reset in class AbstractDataParser

visit

public void visit(Boolean comp)

visit

public void visit(Count comp)

visit

public void visit(Quantity comp)

visit

public void visit(Time comp)

visit

public void visit(Category comp)

visit

public void visit(Text comp)

visit

public void visit(GeometryData geom)

Specified by:

visit in interface DataComponentVisitor

Overrides:

visit in class DataBlockProcessor

getRangeProcessor

protected DataBlockProcessor.AtomProcessor getRangeProcessor(RangeComponent range)

Overrides:

getRangeProcessor in class DataBlockProcessor

getRecordProcessor

protected DataBlockProcessor.RecordProcessor getRecordProcessor(DataRecord record)

Overrides:

getRecordProcessor in class DataBlockProcessor

getVectorProcessor

protected DataBlockProcessor.RecordProcessor getVectorProcessor(Vector vect)

Overrides:

getVectorProcessor in class DataBlockProcessor

getChoiceProcessor

protected DataBlockProcessor.ChoiceProcessor getChoiceProcessor(DataChoice choice)

Specified by:

getChoiceProcessor in class DataBlockProcessor

getArrayProcessor

protected DataBlockProcessor.ArrayProcessor getArrayProcessor(DataArray array)

Overrides:

getArrayProcessor in class DataBlockProcessor

getImplicitSizeProcessor

protected DataBlockProcessor.ImplicitSizeProcessor getImplicitSizeProcessor(DataArray array)

Specified by:

getImplicitSizeProcessor in class DataBlockProcessor

getArraySizeSupplier

protected DataBlockProcessor.ArraySizeSupplier getArraySizeSupplier(String refId)

Specified by:

getArraySizeSupplier in class DataBlockProcessor

moreData

protected boolean moreData()
                    throws IOException

Specified by:

moreData in class AbstractDataParser

Throws:

IOException