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package com.sun.jersey.json.impl;
import com.sun.jersey.api.json.JSONConfiguration;
import com.sun.jersey.core.util.ReaderWriter;
import com.sun.jersey.json.impl.writer.*;
import com.sun.jersey.json.impl.reader.Jackson2StaxReader;
import com.sun.jersey.json.impl.reader.JacksonRootAddingParser;
import com.sun.jersey.json.impl.reader.JsonXmlStreamReader;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jettison.badgerfish.BadgerFishXMLStreamReader;
import org.codehaus.jettison.badgerfish.BadgerFishXMLStreamWriter;
import org.codehaus.jettison.json.JSONObject;
import org.codehaus.jettison.json.JSONTokener;
import org.codehaus.jettison.mapped.Configuration;
import org.codehaus.jettison.mapped.MappedNamespaceConvention;
import org.codehaus.jettison.mapped.MappedXMLStreamReader;
import org.codehaus.jettison.mapped.MappedXMLStreamWriter;
/**
*
* @author japod
*/
public class Stax2JsonFactory {
private Stax2JsonFactory() {
}
public static XMLStreamWriter createWriter(Writer writer, JSONConfiguration config) throws IOException {
return createWriter(writer, config, false);
}
public static XMLStreamWriter createWriter(Writer writer, JSONConfiguration config, boolean writingList) throws IOException {
switch (config.getNotation()) {
case NATURAL:
final JsonGenerator rawGenerator = new JsonFactory().createJsonGenerator(writer);
if (config.isHumanReadableFormatting()) {
rawGenerator.useDefaultPrettyPrinter();
}
final JsonGenerator bodyGenerator = writingList ? JacksonArrayWrapperGenerator.createArrayWrapperGenerator(rawGenerator, config.isRootUnwrapping() ? 0 : 1) : rawGenerator;
if (config.isRootUnwrapping()) {
return new Stax2JacksonWriter(JacksonRootStrippingGenerator.createRootStrippingGenerator(bodyGenerator, writingList ? 2 : 1), config);
} else {
return new Stax2JacksonWriter(bodyGenerator, config);
}
case MAPPED:
return JsonXmlStreamWriter.createWriter(writer, config);
case BADGERFISH:
return new BadgerFishXMLStreamWriter(writer);
case MAPPED_JETTISON:
Configuration jmConfig;
if (null == config.getXml2JsonNs()) {
jmConfig = new Configuration();
} else {
jmConfig = new Configuration(config.getXml2JsonNs());
}
return new MappedXMLStreamWriter(new MappedNamespaceConvention(jmConfig), writer);
default:
return null;
}
}
public static XMLStreamReader createReader(Reader reader, JSONConfiguration config, String rootName) throws XMLStreamException {
return createReader(reader, config, rootName, false);
}
public static XMLStreamReader createReader(Reader reader, JSONConfiguration config, String rootName, boolean readingList) throws XMLStreamException {
Reader nonEmptyReader = ensureNonEmptyReader(reader);
switch (config.getNotation()) {
case NATURAL:
try {
final JsonParser rawParser = new JsonFactory().createJsonParser(nonEmptyReader);
final JsonParser nonListParser = config.isRootUnwrapping() ? JacksonRootAddingParser.createRootAddingParser(rawParser, rootName) : rawParser;
if (!readingList) {
return new Jackson2StaxReader(nonListParser, config);
} else {
return new Jackson2StaxReader(JacksonRootAddingParser.createRootAddingParser(nonListParser, "jsonArrayRootElement"), config);
}
} catch (Exception ex) {
throw new XMLStreamException(ex);
}
case MAPPED:
try {
return new JsonXmlStreamReader(nonEmptyReader, rootName, config);
} catch (IOException ex) {
throw new XMLStreamException(ex);
}
case MAPPED_JETTISON:
try {
Configuration jmConfig;
if (null == config.getXml2JsonNs()) {
jmConfig = new Configuration();
} else {
jmConfig = new Configuration(config.getXml2JsonNs());
}
return new MappedXMLStreamReader(
new JSONObject(new JSONTokener(ReaderWriter.readFromAsString(nonEmptyReader))),
new MappedNamespaceConvention(jmConfig));
} catch (Exception ex) {
throw new XMLStreamException(ex);
}
case BADGERFISH:
try {
return new BadgerFishXMLStreamReader(new JSONObject(new JSONTokener(ReaderWriter.readFromAsString(nonEmptyReader))));
} catch (Exception ex) {
throw new XMLStreamException(ex);
}
}
// This should not occur
throw new IllegalArgumentException("Unknown JSON config");
}
private static Reader ensureNonEmptyReader(Reader reader) throws XMLStreamException {
try {
Reader mr = reader.markSupported() ? reader : new BufferedReader(reader);
mr.mark(1);
if (mr.read() == -1) {
throw new XMLStreamException("JSON expression can not be empty!");
}
mr.reset();
return mr;
} catch (IOException ex) {
throw new XMLStreamException(ex);
}
}
}