Overview SAX parsing is an efficient way to parse XML documents. Unlike DOM (Document Object Model) based parsers, SAX parsers do not load the XML document in memory. SAX parsers use callback methods to let the calling code know about XML related structure. The key interfaces/classes are involved in SAX parsing are listed below: SAXParserFactory: … Read more

Overview This article demonstrates how Aalto can be used to bind namespace URI and prefix during XML generation. Create TestBindingPrefix class as shown below. Prefix is bound using the following API methods: XMLStreamWriter2.setDefaultNamespace() to set the default namespace URI (see line 21 below) XMLStreamWriter2.setPrefix() method for setting the prefix and URI(e.g. see line 28 below) … Read more

Overview This article describes how to generate XML using Aalto Aalto StAX Streaming API can be used to generate XML document. The key classes responsible for generating XML content are XMLOutputFactory2 and XMLStreamWriter2 . Create TestGenerateXml class as shown below. Point the outstream to Console output (see line 16 below). The following methods are used … Read more

Overview This article demonstrates how to handle parsing related errors during asynchronous StAX parsing using Aalto. Create employee.xml as shown below. Note that the end tag for ‘salary’ element is incorrect (see line 4 below). Create TestAsyncParsingError class as shown below. The parsing is done using wrapper class (see this article for further details). Catch … Read more

Overview In the earlier article we explored basic asynchronous StAX parsing using Aalto. In this article we shall see how Aalto’s asynchronous StAX parsing can be used to parse XML comments, processing instructions, CData and entity references. Create employee.xml as shown below. It contains comment, processing instruction, CDATA and entity references (see lines 1,3,7-9 and … Read more

Overview The basics of asynchronous stax parsing using Aalto is covered in the article mentioned here . In that article, you will note that low level buffer manipulation is required to manage asynchronous stax parsing. However, Aalto’s unit test suite provides a very convenient wrapper class that internally handles the details of byte level management … Read more

Overview Aalto provides a unique feature to parse XML documents asynchronously i.e. the InputStream is not blocked when performing StAX based parsing. For further details, please see Introduction to Asynchronous StAX Parsing Using Aalto This article demonstrates the programming aspects for using the asynchronous parsing feature of Aalto. Create employee.xml as shown below. This XML … Read more

Overview Usually StAX parsing is synchronous in nature. By that we mean that the InputStream is blocked by the StAX parser until such time it reads the necessary data. This is typically known as the ‘Pull’ model where-in the StAX parser pulls the data on an as-need basis. In fact, it is this ‘Pull’ model … Read more

Overview This article demonstrates how to handle parser related errors using Aalto StAX parser. Create employee.xml as shown below. Note that the ‘salary’ element is not properly closed (see line 4 below). Create TestErrorHandling as shown below. Catch the WFCException (see line 39 below)) which is short for ‘Well-Formedness Constraint violation’ exception. The output of … Read more

Overview This article demonstrates the how to read namespace related information using Aalto StAX parser. Create employee.xml as shown below. Note the namespace URI ‘https://studytrails.com’ (see line 1 below) and the namespace prefix ‘s’ used in all start and end elements. Create TestReadNamespace as shown below. Note that start element is obtained by using the … Read more