Fork from http://code.google.com/p/protobuf-java-format/

Description

Provide serialization and de-serialization of different formats based on Google’s protobuf Message. Enables overriding the default (byte array) output to text based formats such as XML, JSON and HTML.

##Example For XML output, use XmlFormat

MessagesomeProto = SomeProto.getDefaultInstance();
XmlFormatxmlFormat = newXmlFormat();
StringasXml = xmlFormat.printToString(someProto);

For XML input, use XmlFormat

Message.Builderbuilder = SomeProto.newBuilder();
StringasXml = _loadxmldocumentfromasource_;
XmlFormatxmlFormat = newXmlFormat();
xmlFormat.merge(asXml, builder);

For Json output, use JsonFormat

MessagesomeProto = SomeProto.getDefaultInstance();
JsonFormatjsonFormat = newJsonFormat();
StringasJson = jsonFormat.printToString(someProto);

For Json input, use JsonFormat

Message.Builderbuilder = SomeProto.newBuilder();
StringasJson = _loadjsondocumentfromasource_;
JsonFormatjsonFormat = newJsonFormat();
jsonFormat.merge(asJson, builder);

For HTML output, use HtmlFormat

MessagesomeProto = SomeProto.getDefaultInstance();
HtmlFormathtmlFormat = newHtmlFormat();
StringasHtml = htmlFormat.printToString(someProto);