This time we want to reuse our already written converters for the Person and the Calendar and add an own attribute for the gender. But we reuse the converters registered in XStream for our member fields and handle null values:. Now that we know how the Converter interface works, let’s create a simple calendar converter which uses the locale to convert the information. Let’s go for converting a Calendar in a localized string The current, stable version of XStream is 1. Now we tell whoever calls us that we can handle only Person’s and nothing else, including those classes which extends Person. This is an optional step.
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This is the only type of mapping required to use XStream and even this is optional. For additional insights, you might have a look at XStream test programs that use maps or collections from the test suite. After compiling and running Deserialize. Joe Walnes explained the following in private correspondence: Now that we know how the Converter interface works, let’s create a simple calendar converter which uses the locale to convert the information.
This class is a simple facade designed for common operations. It also produces a kind of reflection of objects in XML.
If the implementation of Birthday ensures, that none of its fields could hold a null value and gender contains a valid value, then we could drop the null condition in the marshal method and in unmarshal we could omit the loop as well as the comparison of the tag names:. This article, however, uses the latest snapshot available in late July There is plenty of CVS activity, enough to give me hope that XStream is in active development and will be around for awhile.
NOrmallyt it will then also be able to read it. XStream doesn’t care about the visibility of the fields.
XStream – Converter Tutorial
Jeromy Evans 4 6. The alias method creates an alias XML element name for the Date class, changing the default domdruver from Date to date.
While XStream is capable of converting this class without any problem, we write our own custom converter just for demonstration. See the Alias Tutorial a more complete introduction.
XStream uses the fully qualified class name for the element name, including the package name, so the alias method will come in handy for tweaking names. Sign up using Email and Password. XStream can convert instances of these to XML xstrea back again. This program serializes the object xstream into XML, producing over 7, lines of “reflection.
You work on a stream and domdrivrr the value of a tag or its members will close the surrounding tag that is still active when the method is called. Since the String representation is complete, a nested element is not necessary anymore:. Post as a guest Name.
Programs were compiled and run with Sun’s Java 1. Let’s enhance the Person with xetream String representation, that contains all necessary text to recreate the instance:. If this is not what you want, change your canConvert method to return true only if class equals GregorianCalendar.
With a current version of XStream, Jeromy’s example would look like this: This time we want to reuse our already written converters for the Person and the Calendar and add an own attribute for the gender. Xpp3 is a very fast XML pull-parser implementation.
Or look into the condensed overview how to configure XStream to tweak the domdruver.
XStream – Two Minute Tutorial
Let’s start with a simple program that shows the basics of Vomdriver serialization. XStream offers a two-minute tutorial and JavaDocs. The next program, Instant. This article demonstrates several example Java programs that should help you get started with XStream today. The differences between Hello.
Note, that in implementation of a SingleValueConverter is required for attributes, since these objects have to be represented by a single string only.