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:. 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 This time we want to reuse our already written converters for the Person and the Calendar and add an own attribute for the gender. We convert no derived classes this time, since they might have additional fields.

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If this is not what you want, change your canConvert method to return true only if class equals GregorianCalendar. You work on a stream and accessing the value of a tag or its members will close the surrounding tag that is lo active when the method is called.

Note, that attributes will always have to be written and read first.

DomDriver (XStream Core API) – Javadoc Extreme

Our converter will receive the Locale in its constructor and we will keep a reference to it in a member variable:. Now we tell whoever calls us that we can handle only Person’s and nothing else, including those classes which extends Person.

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So we make use of an ‘alias’ to change this full class name to something more ‘human’, for example ‘person’. And now let’s go to the unmarshal.

Java Examples for com.thoughtworks.xstream.io.xml.DomDriver

And the other way around We use the moveDown and moveUp methods to move in the tree hierarchy, so we can simply moveDownread the value and moveUp.

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 xm the tag names:.

We convert no derived classes this time, since they might have additional fields. 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 cml 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. The unmarshal method ensures the valid value for the gender by throwing a ConversionException for invalid entries. Now we can output the data Now that we know how the Converter interface works, let’s create a simple calendar converter which uses the locale to convert the information.

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The canConvert method is plain simple. Try using an attribute called fullname in the person tag instead of creating a new child node. Let’s enhance the Person with a String representation, that contains all necessary text to recreate the instance:.

This time we want to reuse our already written converters for the Person and the Xm and add an own attribute for the gender. Since the String representation is complete, a nested element is not necessary anymore:. But we reuse the converters registered in XStream for our member fields and handle null values:.

Now let’s convert anything which extends Calendar: But even nicer, our XML is also simplified using the alias for the Person class. Now that we have configured a simple class to play with, let’s see what XStream converters can do for us