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This will first compile the specified Java class, and then write out a new XSD file called schema1. To override the directory in which schemagen places its output, use the -d option. Finally, the Product class does not have any external dependencies, but if it did, you would need to specify those with the -cp option. Example is what your Java source file looks like. Plain Product.
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The output after invoking schemagen looks like that shown in Example Schema generated by schemagen for Product. First, a single complexType, not an element, was created for your class. Also, there is no target namespace for the schema. Next, the serialVersionUID was ignored, which is intuitive given the fact that it is private, but also given that static fields are not serialized as part of regular Java serialization.
So even if the field had not been private, its static status is enough to keep it from being generated into the schema. The standard schema type xs:dateTime was used to represent the java. Date object, and schemagen kept the fields in the same order. You can decorate your Java class with standard JAXB annotations in order to rearrange your results a little. Product Java class annotated for schema generation package com.
Date; javax. XmlElement; javax. XmlRootElement; javax. So you must repeat that namespace in the XMLType annotation in order to tell schemagen that both the element and the complex type are in the same namespace. This results in the single file that you see here. Had you left off the XMLType annotation, schemagen would have made a conservative guess and left the complex type with no namespace. It then would have been forced to put it in a separate schema file and import the type into the schema defining the element. Notice that using the XMLElement field-level modifier you get to retain your static field in the schema definition.
This has the advantage of being usable at runtime within a larger program. Example is the listing that writes out a schema for your ProductAnnotated. Java program to generate a schema at runtime package com. File; java. IOException; javax. JAXBContext; javax.
JAXBException; javax. SchemaOutputResolver; javax. Result; javax. Discussion In Recipe 2. Ideally, you could change your schemas at will and have the Java sources regenerate when you build your service.
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Now in your build. The schema element points to the location of your schemas and indicates which files to include for generation.
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Here a schemalet source file was included to customize the bindings. For more on how that works, see Recipe 7. Solution There are, of course, tools that do this. The current version is xml-xig You need to pass XIG the name of the schema and the root element you want to create an instance for. Here you are going to point to your Catalog schema and generate an XML document based on the searchResults element. Two files are created: Catalog. Here the Catalog. But the benefit increases with the size and complexity of your schema, and you can use XIG to generate sets of instances.
The XIG file is a template that can be used to generate not just one, but a volume of XML instances based on this type. Moreover, you can pass runtime data to the template to provide distinct values if necessary. Check out the Sourceforge XIG site for details, but here is what the default generated.
This is similar to the parameterized test functionality available in JUnit 4. Solution Define a Schemalet file, and add it to the "includes" attribute of the "schema" element in your XJC Ant task. JAXB does a very good job at the difficult task of mapping schema to Java sources. Schema element names map to type names, namespaces map to packages, and enumerations map directly to Java enumerations. But there are times when you want to override the default behavior and specify your own mapping. This recipe shows you how to do this.
Table String xs:integer java.
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BigInteger xs:int int xs:long long xs:short short xs:decimal java. String xs:duration javax. Duration If you want to have the binding compiler generate a different Java type than the default, you can do this one of two ways: write the desired types in an external file you pass to the binding compiler, or annotate your XML schema. In general, you may not have to do this. Remember that you are building an SOA, not just a Java application. You need to keep in mind that clients of your web service will need to be able to do everything that your contract specifies. Working with polymorphic types or getting far into the outer reaches of what schema can do may not serve you well in an SOA.
There are four scopes for binding customizations, each of which specifies the range of schema components to which it applies. They are listed in Table Binding scopes Scope Description Global uses Applies to all schema elements in the current schema, as well as all schemas imported or included by the current schema, recursively. Schema uses Applies to all schema elements in the target namespace of the current schema.
Definition Applies to the element in which the binding is specified, as well as all other schema elements that reference this type definition. Component Applies only to the element in which the binding is specified. These scopes can override one another, with the most specific scope always overriding any more general scopes that would have covered it.
Using Inline Annotations The first of two ways to customize your generated code is to use inline annotations. XML Schema makes available the child element of specifically for the purpose of allowing applications to perform customization for their environment. Then in the appinfo section, add your global customizations so that any dateTime or date type you encounter in the current schema or any schema it reuses will assume your custom type.
You can add other annotations here in different scopes, and add your regular comments in the annotation. The Java type you want to use as the target is indicated by the name attribute, and the type in the schema you will convert to that target is specified by the xmlType attribute. You also indicate a parseMethod and a printMethod as the names of methods in the specified JAXB class that will be intercepted to substitute with your value during parsing and printing.
Using an External File schemalet It might be preferable to put your binding customization annotations in an external file, and not in the schema itself.
Like so many things, this has advantages and disadvantages. Depending on your environment, this could 2. But the downside to using the external method is that the customization is bound to the schema only at runtime during parsing, and readers of your source schema may be entirely unaware of the potentially significant changes you might be making to code generated from it. This could also be more or less of an issue depending on the extent and scope of your customizations. Calendar or java. Date instead. You can specify this in a schemalet, an XML file that looks something like the one shown in Example External file for XML schema binding customization This file maps both xs:date and xs:dateTime to java.
Save it with an. The code to specify the binding customization in an external file is very similar to that specified inline. In fact, the code within the element is identical. You point to the schemalet using the -b switch that allows you to specify either a directory in which to find files with a. You might have noticed the XmlTypeAdapter annotation indicating that the type is modified using the Adapter2.
These customizations extend the XML adapter class, parameterized on two values: a type that JAXB knows how to work with already and the bound type.
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It defines two methods: marshal and unmarshal, each of which performs the actual translation at runtime. As a final note, there may be cases where you would want to customize your JAXB source generation. It makes sense to want to encapsulate certain types if it ensures better encapsulation of your web services layers. But excessive customization can make it more difficult to maintain your code, and can potentially introduce interoperability 2. So while customization is powerful and easy to use, and frequently is necessary to get the result you need, use caution and consider not going too far down this road.
You want to validate that the resulting XML conforms to the specified schema before making the request.