Which jar has javax.xml.bind.annotation

To use the Date class, you'll need to do a bit more work. First, put the following class into your source tree:. Customization to use Date for x s:date. There are other kinds of classes that are more close to reflection. Those classes don't have methods like getAddress , and instead you'd do get "Address". It's one class that represents million different data structures, be it a customer table or a product table. Instead, you almost always need to look at an instance to determine the shape of XML.

These classes are not really suitable for binding in JAXB. There are a few online articles that cover this topic. Also, many modern database offers a native ability to export a query into XML, which is supposed to work a lot faster than you'd do in Java and saves your time of writing code.

JAXB spec defines a special handling for Map when it's used as a propety of a bean. For example, the following bean would produce XMLs like the following:.

Unfortunately, as of 2. This issue has been recorded as and the fix needs to happen in later versions of the JAXB spec. In the mean time, such top-level objects have to be first adapted to a bean that JAXB can process.

This has added benefit of being able to control XML representation better. The following code illustrates how to do this:. If you have a lot of difference kinds of Map , you can instead use Object as the key and the value type. In that way, you'll be able to use maps with different type parameters, at the expense of seeing xsi:type attribute on the instance document.

When your interface is implemented by a large number of sub-classes, consider using XmlRootElement annotation like this:. Implementations are open-ended; anyone can implement those interfaces, even by different people from different modules, provided they are all given to the JAXBContext. There's no need to list all the implementation classes in anywhere. Every reference to interface needs to have the XmlElementRef annotation.

XmlElementWrapper is often useful with this, as it allows you need to group them. Such as:. When you use interfaces just to hide your implementation classes from exposure, and when there's 1-to-1 or close to 1-on-1 relationship between a class and an interface, XmlJavaTypeAdapter can be used like below.

Interface and implementation will be tightly coupled through an adapter, although changing an adapter code will allow you to support multiple implementations. A variation of this technique is when you have a few implementations for interface, not just one. XmlJavaTypeAdapter for interfaces with multiple implementations. To take this example a bit further, you can use Object instead of AbstractFooImpl.

The following example illustarates this:. As you can see, the schema will generated to accept xs:anyType which is more relaxed than what the Java code actually demands.

The instance will be the same as the above example. AnyTypeAdapter class in the runtime that defines this adapter. So you won't have to write this adapter in your code. If the use of interface is very little and there's 1-to-1 or close to relationship between interfaces and implementations, then you might find XmlElement to be the least amount of work. In this approach, a reference to an interface has to have knowledge of the actual implementation class.

So while this requires the least amount of typing, it probably wouldn't work very well if this crosses module boundaries. Like the XmlJavaTypeAdapter approach, this can be used even when there are multiple implementations, provided that they share the common ancestor. Occasionally the above approaches cause the generated schema to become somewhat ugly, even though it does make the JAXB runtime work correctly.

See this thread for an example. TODO: more details and perhaps an example. Some users attempted to use the " generateValueClass " customization and see if they can completely replace the generated implementations with other implementations. Unfortunately, this does not work. So just implementing interfaces is not sufficient. This mode is mainly added to simplify the migration from JAXB 1. Here is the basic problem of evolution. Now you are working towawrd CoolApp v2, and you want to make some changes to Foo.

But you want to do so in such a way that v1 and v2 can still talk to each other. The evolution compatibility has two different aspects. One is the schema compatibility , which is about the relationship between the v1 schema and the v2 schema. There are two directions in the runtime compatibility. One is whether v1 can still read what v2 write forward compatible , and the other is whether v2 can read what v1 wrote backward compatible. So we call it backward semi-compatible if v2 can read what v1 wrote in this default unmarshalling mode, and similarly forward semi-compatible if v1 can read what v2 wrote in this default unmarshalling mode.

Those changes are both backward and forward compatible, as they don't cause any change to the XML representation. Adding super class is backward compatible and forward semi-compatible. Similarly, removing super class is forward compatible and backward semi-compatible. Adding new annotated fields or methods is backward compatible and forward semi-compatible. Similarly, removing them is forward compatible and backward semi-compatible. If you change the property name from X to Y, that would be the equivalent of deleting X and adding Y, so it would be backward and forward semi-compatible.

These are backward and forward semi-compatible. See below:. If you change a property type, generally speaking it will be not compatible at all. For example, you can't change from java.

Calendar to int and expect it to work. To make it a somewhat compatible change, the old type and the new type has to be related. For example, String can represent all int values, so changing int to String would be a backward compatible and forward semi-compatible change. Your program sometimes needs to have a different in-memory data structure from its XML representation. JAXB has a few different ways to achieve this.

XmlJavaTypeAdapter allows you to de-couple the in-memory representation and the XML representation by introducing an intermediate representation. The basic model is as follows:. See XmlAdapter for a general description of how adapters works. Adapters extend from the XmlAdapter class and provide two methods "unmarshal" and "marshal" that converts values in both directions, and then the XmlJavaTypeAdapter annotation is used to tell JAXB where and what adapters kick in.

The following example illustrates how to do this, by using java. Color as an example. Since XmlJavaTypeAdapter is on a field, this adapter only kicks in for this particular field. If you have many Color fields and would like them all to use the same adapter, you can move the annotation to a package:. This causes all the fields in the classes in the foo package to use the same specified adapter.

Also see the DatatypeConverter class that defines a series of basic conversion routines that you may find useful. Another useful technique is to define two properties, one for JAXB and the other for your application. The getter and setter methods on this property will handle the conversion between the in-memory representation and the XML representation. In fact, when you try to marshal an object tree that contains a cycle, the JAXB marshaller reports an error, pointing out the objects that formed the cycle.

This is because JAXB by itself cannot figure out how to cut cycles into a tree. Thus it is your responsibility to annotate classes and use other means to "tell" JAXB how to handle a cycle.

This chapter talks about various techniques to do this. One of the very common forms of cycle is a parent pointer. The following example illustrates a typical parent pointer, and how this can be turned into "natural" XML:. And reading this document back into Java objects will produce the expected tree with all the proper parent pointers set up correctly.

The first technique here is the use of XmlTransient on the parent pointer. This causes the marshaller to produce the expected XML. However, when you unmarshal it, since this field is not bound, the Employee. That's where the second technique comes in, which is the use of the afterUnmarshal callback.

This method is invoked by the JAXB implementation on each instance when the unmarshalling of a Employee object completes. Furthermore, the second parameter to the method is the parent object, which in this case is a Department object.

So in this example, this sets up the parent pointer correctly. See below for an example:. There are a few things to consider when you do this. First, the object to be referenced must have an ID that is unique within the whole document. You'd also need to ensure that the referenced objects are contained somewhere else like in the Root class in this case , or else Bar objects will never be marshalled.

This technique can be used to remove the cyclic references, but it's only possible when your object model has an easy cut point. Starting 2. Applications can choose to implement this interface in some of its objects. When a cyclic reference is detected during marshalling, and if the object that formed a cycle implements this interface, then the method on this interface is called to allow an application to nominate its replacement to be written to XML.

In this way, the application can recover from a cycle gracefully. This technique allows you to cope with a situation where you cannot easily determine upfront as to where a cycle might happen. Another downside of this is that unless you nominate your replacement carefully, you can make the marshalling output invalid with respect to the schema, and thus you might hit another problem when you try to read it back later.

Classes with XmlRootElement can be unmarshalled from XML elements simply by invoking the unmarshal method that takes one parameter. This is the simplest mode of unmarshalling. However, sometimes you may need to unmarshal an instance of a type that does not have an XmlRootElement. For example, you might dynamically find out at the runtime that a certain element has a certain type. To unmarshal this into a Foo class, use the version of the unmarshal method that takes the 'expectedType' argument, as follows:.

To reduce the number of the unmarshal methods, this two-argument version is not defined for every single-argument version. So as in this example, you might need to perform additional wrapping of the input parameter. First, use an independent schema validator to check if your document is really valid with respect to the schema you compiled.

When the root element of a document is invalid, then the unmarshaller will issue "unexpected element" errors. When a portion of a document is invalid, JAXB skips that portion, so the end result is that the unmarshalling returns normally, yet you notice that a part of the content tree is missing. This is often the desirable behavior, but it sometimes ends up masking a problem.

Also, try to install ValidationEventHandler on the unmarshaller. When a portion of a document is skipped, the unmarshaller notifies a ValidationEventHandler , so it allows you to see what's going on. Also consider installing a Schema object to the unmarshaller, so that the unmarshaller performs a schema validation while unmarshalling.

JAXBContext "knows" a set of classes, and if it doesn't know a class that it's supposed to know, then the unmarshaller may fail to perform as you expected. It will output the list of classes it knows.

If a class is not in this list, the unmarshaller will never return an instance of that class. Make you see all the classes you expect to be returned from the unmarshaller in the list. When dealing with a large schema that spans across a large number of classes and packages, this is one possible cause of a problem. If you are binding classes that are generated from XJC, then the easiest way to include all the classes is to specify the generated ObjectFactory class es.

Because of the "strange" way that element default values in XML Schema work, people often get confused about their behavior. This section describes how this works. All rights reserved. Use is subject to license terms.

Also see the documentation redistribution policy. Summary: Required Optional Detail: Element. An Ant task corresponds to a class in the class hierarchy.

ClassNotFoundException: javax. Other "import-undefined" queries related to "Import javax. XmlRootElement not resolved" Uncaught ReferenceError: Buffer is not defined in React When I install any npm package in window this error occur and can not install package properly Heading text not getting on button click in reactJs?

Redux-Saga: Saga does not work sometimes on action dispatch ReactJs: How to pass data from one component to another? Related Questions. You don't need a module-info. But if you would have one, you would have to put the JARs on the modulepath, otherwise like in your case you have to put the JARs on the classpath modulepath would also work if there is no package that exists in more than one JAR.

A JAR that is exported is visible to other projects that have the project in the Java Build Path if you only have one project, it doesn't matter.

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