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<b>Release 2.7</b><br /></font></td>
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<div class="sect1"><!-- infolevel="all" infotype="General" -->
<h1 class="sect1"><font face="arial, helvetica, sans-serif" color="#330099">Bootstrapping from XML Schema (XSD)</font></h1>
<p>With EclipseLink MOXy, you can provide an existing XML schema from which to create a <code>DynamicJAXBContext</code>. EclipseLink will parse the schema and generate <code>DynamicTypes</code> for each complex type. This is achieved by use of the <code>DynamicJAXBContextFactory</code> class. A <code>DynamicJAXBContext</code> cannot be instantiated directly; it must be created through the factory API.</p>
<p>You can pass the XML Schema to <code>DynamicJAXBContextFactory</code> by using:</p>
<ul>
<li>
<p><code>java.io.InputStream</code></p>
</li>
<li>
<p><code>org.w3c.dom.Node</code></p>
</li>
<li>
<p><code>javax.xml.transform.Source</code></p>
</li>
</ul>
<div align="center">
<div class="inftblnote"><br />
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<p class="note"><img src="../../dcommon/images/note_icon.png" width="16" height="16" alt="Note" style="vertical-align:middle;padding-right:5px;" />Note:</p>
<p>EclipseLink MOXy uses Sun's XJC (XML-to-Java Compiler) APIs to parse the schema into an in-memory representation and generate dynamic types and mappings. When bootstrapping from XSD, you will need to include <code>jaxb-xjc.jar</code> (from the JAXB reference implementation) on your <strong>CLASSPATH</strong>.</p>
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<!-- class="inftblnote" --></div>
<p>The APIs used to create a DynamicJAXBContext are as follows:</p>
<div class="example"><a id="TLJAX451" name="TLJAX451"></a><a id="sthref197" name="sthref197"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 9-4 Creating a DynamicJAXBContext</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
/**
* Create a DynamicJAXBContext, using XML Schema as the metadata source.
*
* @param schemaStream
* java.io.InputStream from which to read the XML Schema.
* @param resolver
* An org.xml.sax.EntityResolver, used to resolve schema imports. Can be null.
* @param classLoader
* The application's current class loader, which will be used to first lookup
* classes to see if they exist before new DynamicTypes are generated. Can be
* null, in which case Thread.currentThread().getContextClassLoader() will be used.
* @param properties
* Map of properties to use when creating a new DynamicJAXBContext. Can be null.
*
* @return
* A new instance of DynamicJAXBContext.
*
* @throws JAXBException
* if an error was encountered while creating the DynamicJAXBContext.
*/
public static DynamicJAXBContext createContextFromXSD(java.io.InputStream schemaStream, EntityResolver resolver,
ClassLoader classLoader, Map&lt;String, ?&gt; properties) throws JAXBException
public static DynamicJAXBContext createContextFromXSD(org.w3c.dom.Node schemaDOM, EntityResolver resolver,
ClassLoader classLoader, Map&lt;String, ?&gt; properties) throws JAXBException
public static DynamicJAXBContext createContextFromXSD(javax.xml.transform.Source schemaSource, EntityResolver resolver,
ClassLoader classLoader, Map&lt;String, ?&gt; properties) throws JAXBException
</pre></div>
<!-- class="example" -->
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<p class="note"><img src="../../dcommon/images/note_icon.png" width="16" height="16" alt="Note" style="vertical-align:middle;padding-right:5px;" />Note:</p>
<p>The classLoader parameter is your application's current class loader, and will be used to first lookup classes to see if they exist before new <code>DynamicTypes</code> are generated. The user may pass in <code>null</code> for this parameter, and <code>Thread.currentThread().getContextClassLoader()</code> will be used instead.</p>
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<!-- class="inftblnote" --></div>
<p>This example shows how to create and marshall a new object using Dynamic MOXy.</p>
<div class="example"><a id="TLJAX452" name="TLJAX452"></a><a id="sthref198" name="sthref198"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 9-5 Sample XML Schema</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;xs:schema targetNamespace="example" xmlns:myns="example" xmlns:xs="http://www.w3.org/2001/XMLSchema"
attributeFormDefault="qualified" elementFormDefault="qualified"&gt;
&lt;xs:element name="customer" type="myns:customer"/&gt;
&lt;xs:complexType name="customer"&gt;
&lt;xs:sequence&gt;
&lt;xs:element name="first-name" type="xs:string"/&gt;
&lt;xs:element name="last-name" type="xs:string"/&gt;
&lt;xs:element name="address" type="myns:address"/&gt;
&lt;/xs:sequence&gt;
&lt;/xs:complexType&gt;
&lt;xs:complexType name="address"&gt;
&lt;xs:sequence&gt;
&lt;xs:element name="street" type="xs:string"/&gt;
&lt;xs:element name="city" type="xs:string"/&gt;
&lt;xs:element name="province" type="xs:string"/&gt;
&lt;xs:element name="postal-code" type="xs:string"/&gt;
&lt;/xs:sequence&gt;
&lt;/xs:complexType&gt;
&lt;/xs:schema&gt;
</pre></div>
<!-- class="example" -->
<p>The code snippet in <a href="#BGBFCCBC">Example 9-6</a>:</p>
<ul>
<li>
<p>Passes the XML Schema to <code>DynamicJAXBContextFactory</code> to create a <code>DynamicJAXBContext</code></p>
</li>
<li>
<p>Creates new <code>DynamicEntities</code> and sets their properties</p>
</li>
<li>
<p>Creates a <code>JAXBMarshaller</code> and marshals the Java objects to XML</p>
</li>
</ul>
<div class="example"><a id="BGBFCCBC" name="BGBFCCBC"></a><a id="TLJAX453" name="TLJAX453"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 9-6 Sample Application Code</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
InputStream inputStream = myClassLoader.getSystemResourceAsStream("example/resources/xsd/customer.xsd");
DynamicJAXBContext dContext = DynamicJAXBContextFactory.createContextFromXSD(inputStream, null, myClassLoader, null);
DynamicEntity newCustomer = dContext.newDynamicEntity("example.Customer");
newCustomer.set("firstName", "George");
newCustomer.set("lastName", "Jones");
DynamicEntity newAddress = dContext.newDynamicEntity("example.Address");
newAddress.set("street", "227 Main St.");
newAddress.set("city", "Toronto");
newAddress.set("province", "Ontario");
newAddress.set("postalCode", "M5V1E6");
newCustomer.set("address", newAddress);
dContext.createMarshaller().marshal(newCustomer, System.out);
</pre></div>
<!-- class="example" -->
<a id="TLJAX454" name="TLJAX454"></a>
<div class="sect2"><a id="sthref199" name="sthref199"></a>
<h2 class="sect2"><font face="arial, helvetica, sans-serif" color="#330099">Importing Other Schemas / EntityResolvers</font></h2>
<p>If the XML schema that you use to bootstrap imports other schemas, you must configure an <code>org.xml.sax.EntityResolver</code> to resolve the locations of the imported schemas. You can then pass the <code>EntityResolver</code> to the <code>DynamicJAXBContextFactory</code>.</p>
<p>In <a href="#BGBIIEGH">Example 9-7</a>, each type is defined in its own schema:</p>
<div class="example"><a id="BGBIIEGH" name="BGBIIEGH"></a><a id="TLJAX455" name="TLJAX455"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 9-7 Sample XML Schema</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
&lt;!-- customer.xsd --&gt;
&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;xs:schema xmlns:myns="example" xmlns:add="addressNamespace"
xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="example"&gt;
&lt;xs:import namespace="addressNamespace" schemaLocation="address.xsd"/&gt;
&lt;xs:element name="customer" type="myns:customer"/&gt;
&lt;xs:complexType name="customer"&gt;
&lt;xs:sequence&gt;
&lt;xs:element name="first-name" type="xs:string"/&gt;
&lt;xs:element name="last-name" type="xs:string"/&gt;
&lt;xs:element name="address" type="add:address"/&gt;
&lt;/xs:sequence&gt;
&lt;/xs:complexType&gt;
&lt;/xs:schema&gt;
</pre></div>
<!-- class="example" -->
<p>You must supply an <code>EntityResolver</code> implementation to resolve the location of the imported schema.</p>
<p><a href="#BGBIJHID">Example 9-8</a> illustrates the <code>EntityResolver</code>:</p>
<div class="example"><a id="BGBIJHID" name="BGBIJHID"></a><a id="TLJAX456" name="TLJAX456"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 9-8 Sample Application Code</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
class MyEntityResolver implements EntityResolver {
public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
// Imported schemas are located in ext\appdata\xsd\
// Grab only the filename part from the full path
String filename = new File(systemId).getName();
// Now prepend the correct path
String correctedId = "ext/appdata/xsd/" + filename;
InputSource is = new InputSource(ClassLoader.getSystemResourceAsStream(correctedId));
is.setSystemId(correctedId);
return is;
}
}
</pre></div>
<!-- class="example" -->
<p>When you create the <code>DynamicJAXBContext</code>, pass the <code>EntityResolver</code> to it, as shown here:</p>
<pre xml:space="preserve" class="oac_no_warn">
InputStream inputStream = ClassLoader.getSystemResourceAsStream("com/foo/sales/xsd/customer.xsd");
DynamicJAXBContext dContext = DynamicJAXBContextFactory.createContextFromXSD(inputStream, new MyEntityResolver(), null, null);
</pre>
<p>If you encounter the following exception when importing another schema:</p>
<p><code>Internal Exception: org.xml.sax.SAXParseException: schema_reference.4: Failed to read schema document '&lt;imported-schema-name&gt;', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not &lt;xsd:schema&gt;.</code></p>
<p>You should disable XJC's schema correctness check option, either in code:</p>
<p><code>System.setProperty("com.sun.tools.xjc.api.impl.s2j.SchemaCompilerImpl.noCorrectnessCheck", "true")</code></p>
<p>or from the command line:</p>
<p><code>-Dcom.sun.tools.xjc.api.impl.s2j.SchemaCompilerImpl.noCorrect</code></p>
</div>
<!-- class="sect2" -->
<a id="TLJAX457" name="TLJAX457"></a>
<div class="sect2"><a id="sthref200" name="sthref200"></a>
<h2 class="sect2"><font face="arial, helvetica, sans-serif" color="#330099">Customizing Generated Mappings with XJC External Binding Customization Files</font></h2>
<p>When bootstrapping from an XSD, you have the option to customize the mappings that will be generated through the use of XJC's External Binding Customization file format (<code>.xjb</code>). In the example below, the package name of the dynamic classes has been overridden, and the name attribute has been renamed to <code>last-name-comma-first-name</code>.</p>
<div class="example"><a id="TLJAX458" name="TLJAX458"></a><a id="sthref201" name="sthref201"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 9-9 custom1.xjb File</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
&lt;jxb:bindings version="1.0" xmlns:jxb="http://java.sun.com/xml/ns/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema"&gt;
&lt;jxb:bindings schemaLocation="employee.xsd" node="/xs:schema"&gt;
&lt;!-- Customize the package name that is generated for each schema --&gt;
&lt;jxb:schemaBindings&gt;
&lt;jxb:package name="com.acme.internal"/&gt;
&lt;/jxb:schemaBindings&gt;
&lt;!-- Rename the 'name' element to 'last-name-comma-first-name' --&gt;
&lt;jxb:bindings node="//xs:complexType[@name='person']"&gt;
&lt;jxb:bindings node=".//xs:element[@name='name']"&gt;
&lt;jxb:property name="last-name-comma-first-name"/&gt;
&lt;/jxb:bindings&gt;
&lt;/jxb:bindings&gt;
&lt;/jxb:bindings&gt;
&lt;/jxb:bindings&gt;
</pre></div>
<!-- class="example" -->
<p>For complete information on the External Binding Customization file format, please see <code><a href="http://download.oracle.com/docs/cd/E17802_01/webservices/webservices/docs/2.0/tutorial/doc/JAXBUsing4.html">http://download.oracle.com/docs/cd/E17802_01/webservices/webservices/docs/2.0/tutorial/doc/JAXBUsing4.html</a></code>.</p>
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<p class="note"><img src="../../dcommon/images/note_icon.png" width="16" height="16" alt="Note" style="vertical-align:middle;padding-right:5px;" />Note:</p>
<p>If you wish to use External Binding Customization files, you will need to use <strong>Source</strong> objects to point to your XML Schema. <strong>Sources</strong> are used to load the <code>.xjb</code> files as well, and they must all have the same System ID set.</p>
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<!-- class="inftblnote" --></div>
<p><a href="#BABIJDEI">Example 9-10</a> illustrates bootstrapping from an XSD, and customizing the mapping generation using two separate&nbsp;<code>.xjb</code> files.</p>
<div class="example"><a id="BABIJDEI" name="BABIJDEI"></a><a id="TLJAX459" name="TLJAX459"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 9-10 Bootstrapping Example</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
String xsd = "example/resources/xsd/employee.xsd";
String xjb1 = "example/resources/xsd/custom1.xjb";
String xjb2 = "example/resources/xsd/custom2.xjb";
InputStream xsdStream = classLoader.getSystemResourceAsStream(xsd);
Source xsdSource = new StreamSource(xsdStream);
// Set SYSTEM_ID to the filename part of the XSD
xsdSource.setSystemId("employee.xsd");
InputStream xjbStream = classLoader.getResourceAsStream(xjb1);
Source xjbSource = new StreamSource(xjbStream);
// Set SYSTEM_ID to be the same as the XSD
xjbSource.setSystemId(xsdSource.getSystemId());
InputStream xjbStream2 = classLoader.getResourceAsStream(xjb2);
Source xjbSource2 = new StreamSource(xjbStream2);
// Set SYSTEM_ID to be the same as the XSD
xjbSource2.setSystemId(xsdSource.getSystemId());
ArrayList&lt;Source&gt; xjbFiles = new ArrayList&lt;Source&gt;(2);
xjbFiles.add(xjbSource);
xjbFiles.add(xjbSource2);
// Put XSD and XJBs into Properties
Map&lt;String, Object&gt; properties = new HashMap&lt;String, Object&gt;();
properties.put(DynamicJAXBContextFactory.XML_SCHEMA_KEY, xsdSource);
properties.put(DynamicJAXBContextFactory.EXTERNAL_BINDINGS_KEY, xjbFiles);
// Create Context
DynamicJAXBContext jaxbContext = (DynamicJAXBContext) JAXBContext.newInstance("example", classLoader, properties);
</pre></div>
<!-- class="example" -->
<p>The value of <code>EXTERNAL_BINDINGS_KEY</code> can be either a single <code>Source</code> or a <code>List&lt;Source&gt;</code>, pointing to your External Binding Customization file(s).</p>
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