IO XML DOMDRIVER DRIVER

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:. And now let’s go to the unmarshal. Note, that in implementation of a SingleValueConverter is required for attributes, since these objects have to be represented by a single string only. Let’s go for converting a Calendar in a localized string While XStream is capable of converting this class without any problem, we write our own custom converter just for demonstration. And the other way around

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Now let’s convert anything which extends Calendar: Note, that in implementation of a SingleValueConverter is required for attributes, since these objects have to be represented by a single string only.

You work on a stream and accessing the value of a tag or its members will close the surrounding tag domdrive is still active when the method is called.

This time we want to reuse our domvriver written converters for the Person and the Calendar and add an own attribute for the gender.

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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:. The unmarshal method ensures the valid value for the gender by throwing a ConversionException for invalid entries.

Let’s enhance the Person ip a String representation, that contains all necessary text to recreate the instance:.

Java Examples for ver

But we reuse the converters registered in XStream for our member fields and handle null values:. We convert no derived classes this time, since they might have additional fields. The canConvert method is plain simple.

Now we tell whoever calls us that we can domdtiver only Person’s and nothing else, including those classes which extends Person. Now that we have configured a simple class to play with, let’s see what XStream converters can do for us Note, that attributes will always have to be written and read first.

XStream – Converter Tutorial

Now we can output the data If this is not what you want, change your canConvert method to return true only if class equals GregorianCalendar. Our converter will receive the Locale in its constructor and we will keep a reference to it in a member variable:. And the other way around And now let’s go to the unmarshal.

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Since the String representation is complete, a nested element is not necessary anymore:. Let’s go for converting a Calendar in a localized string We use the moveDown and moveUp methods to move in the tree hierarchy, so we can simply moveDownread the value and moveUp. Domddiver even nicer, our XML is also simplified using the alias for the Person class.

So we domdrover use of an ‘alias’ to change this full class name to something more ‘human’, for example ‘person’. While XStream is capable of converting this class without any problem, we write our own custom converter just for demonstration.

Try using an attribute called fullname in the person tag instead of creating a new child node. Now that we know how the Converter interface works, let’s create a simple calendar converter which uses the locale to convert the information.