Java Architecture for XML Binding (JAXB) is a Java API that allows Java developers to map Java classes to XML representations.

jaxb-api-2.3.1.jar is the JAR file for the JAXB API 2.3 specification. You can download and use it directly without any building process as shown in the last tutorial.

If you want to rebuild the JAR file, you can download the source code at JAXB API Maven Website.

You can also browse the source code below:

⏎ javax/xml/bind/annotation/XmlElementDecl.java

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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
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package javax.xml.bind.annotation;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.RetentionPolicy.RUNTIME;
import static java.lang.annotation.ElementType.METHOD;

/**
 * Maps a factory method to a XML element.
 *
 * <p> <b>Usage</b> </p>
 *
 * The annotation creates a mapping between an XML schema element
 * declaration and a <i> element factory method </i> that returns a
 * JAXBElement instance representing the element
 * declaration. Typically, the element factory method is generated
 * (and annotated) from a schema into the ObjectFactory class in a
 * Java package that represents the binding of the element
 * declaration's target namespace. Thus, while the annotation syntax 
 * allows &#64;XmlElementDecl to be used on any method, semantically
 * its use is restricted to annotation of element factory method. 
 *
 * The usage is subject to the following constraints:
 * 
 * <ul>
 *   <li> The class containing the element factory method annotated
 *        with &#64;XmlElementDecl must be marked with {@link
 *        XmlRegistry}. </li> 
 *   <li> The element factory method must take one parameter
 *        assignable to {@link Object}.</li> 
 * </ul>
 *
 * <p><b>Example 1: </b>Annotation on a factory method
 * <pre>
 *     // Example: code fragment
 *     &#64;XmlRegistry
 *     class ObjectFactory {
 *         &#64;XmlElementDecl(name="foo")
 *         JAXBElement&lt;String&gt; createFoo(String s) { ... }
 *     }
 * </pre>
 * <pre> {@code
 * 
 *     <!-- XML input -->
 *     <foo>string</foo>
 *
 *     // Example: code fragment corresponding to XML input
 *     JAXBElement<String> o =
 *     (JAXBElement<String>)unmarshaller.unmarshal(aboveDocument);
 *     // print JAXBElement instance to show values
 *     System.out.println(o.getName());   // prints  "{}foo"
 *     System.out.println(o.getValue());  // prints  "string"
 *     System.out.println(o.getValue().getClass()); // prints "java.lang.String"
 *
 *     <!-- Example: XML schema definition -->
 *     <xs:element name="foo" type="xs:string"/>
 * }</pre>
 *
 * <p><b>Example 2: </b> Element declaration with non local scope
 * <p>
 * The following example illustrates the use of scope annotation
 * parameter in binding of element declaration in schema derived
 * code. 
 * <p>
 * The following example may be replaced in a future revision of
 * this javadoc.
 * 
 * <pre>{@code
 *     <!-- Example: XML schema definition -->
 *     <xs:schema>
 *       <xs:complexType name="pea">
 *         <xs:choice maxOccurs="unbounded">
 *           <xs:element name="foo" type="xs:string"/>
 *           <xs:element name="bar" type="xs:string"/>
 *         </xs:choice>
 *       </xs:complexType>
 *       <xs:element name="foo" type="xs:int"/>
 *     </xs:schema>
 * }</pre> 
 * <pre>
 *     // Example: expected default binding
 *     class Pea {
 *         &#64;XmlElementRefs({
 *             &#64;XmlElementRef(name="foo",type=JAXBElement.class)
 *             &#64;XmlElementRef(name="bar",type=JAXBElement.class)
 *         })
 *         List&lt;JAXBElement&lt;String&gt;&gt; fooOrBar;
 *     }
 * 
 *     &#64;XmlRegistry
 *     class ObjectFactory {
 *         &#64;XmlElementDecl(scope=Pea.class,name="foo")
 *         JAXBElement&lt;String&gt; createPeaFoo(String s);
 * 
 *         &#64;XmlElementDecl(scope=Pea.class,name="bar")
 *         JAXBElement&lt;String&gt; createPeaBar(String s);
 * 
 *         &#64;XmlElementDecl(name="foo")
 *         JAXBElement&lt;Integer&gt; createFoo(Integer i);
 *     }
 * 
 * </pre>
 * Without scope createFoo and createPeaFoo would become ambiguous
 * since both of them map to a XML schema element with the same local
 * name "foo". 
 *
 * @see XmlRegistry
 * @since 1.6, JAXB 2.0
 */
@Retention(RUNTIME)
@Target({METHOD})
public @interface XmlElementDecl {
    /**
     * scope of the mapping.
     *
     * <p>
     * If this is not {@link XmlElementDecl.GLOBAL}, then this element
     * declaration mapping is only active within the specified class.
     */
    Class scope() default GLOBAL.class;

    /**
     * namespace name of the XML element.
     * <p>
     * If the value is "##default", then the value is the namespace
     * name for the package of the class containing this factory method.
     *
     * @see #name()
     */
    String namespace() default "##default";

    /**
     * local name of the XML element.
     *
     * <p>
     * <b> Note to reviewers: </b> There is no default name; since
     * the annotation is on a factory method, it is not clear that the
     * method name can be derived from the factory method name.
     * @see #namespace()
     */
    String name();

    /**
     * namespace name of a substitution group's head XML element.
     * <p>
     * This specifies the namespace name of the XML element whose local
     * name is specified by {@code substitutionHeadName()}.
     * <p> 
     * If {@code susbtitutionHeadName()} is "", then this
     * value can only be "##default". But the value is ignored since
     * since this element is not part of susbtitution group when the
     * value of {@code susbstitutionHeadName()} is "".
     * <p>
     * If {@code susbtitutionHeadName()} is not "" and the value is
     * "##default", then the namespace name is the namespace name to 
     * which the package of the containing class, marked with {@link
     * XmlRegistry }, is mapped.
     * <p>
     * If {@code susbtitutionHeadName()} is not "" and the value is
     * not "##default", then the value is the namespace name.
     *
     * @see #substitutionHeadName()
     */
    String substitutionHeadNamespace() default "##default";

    /**
     * XML local name of a substitution group's head element.
     * <p>
     * If the value is "", then this element is not part of any
     * substitution group.
     *
     * @see #substitutionHeadNamespace()
     */
    String substitutionHeadName() default "";

    /**
     * Default value of this element.
     *
     * <p>
     * The <pre>'\u0000'</pre> value specified as a default of this annotation element
     * is used as a poor-man's substitute for null to allow implementations
     * to recognize the 'no default value' state.
     */
    String defaultValue() default "\u0000";
    
    /**
     * Used in {@link XmlElementDecl#scope()} to
     * signal that the declaration is in the global scope.
     */
    public final class GLOBAL {}
}

⏎ javax/xml/bind/annotation/XmlElementDecl.java

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File name: jaxb-api-2.3.1-sources.jar
File size: 271123 bytes
Release date: 2018-10-10
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