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/* * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package javax.xml.bind.annotation; import java.lang.annotation.Retention; import java.lang.annotation.Target; import static java.lang.annotation.ElementType.*; import static java.lang.annotation.RetentionPolicy.*; /** * <p> * Maps a JavaBean property to a XML attribute. * * <p> <b>Usage</b> </p> * <p> * The <tt>@XmlAttribute</tt> annotation can be used with the * following program elements: * <ul> * <li> JavaBean property </li> * <li> field </li> * </ul> * * <p> A static final field is mapped to a XML fixed attribute. * * <p>See "Package Specification" in javax.xml.bind.package javadoc for * additional common information.</p> * * The usage is subject to the following constraints: * <ul> * <li> If type of the field or the property is a collection * type, then the collection item type must be mapped to schema * simple type. * <pre> * // Examples * @XmlAttribute List<Integer> items; //legal * @XmlAttribute List<Bar> foo; // illegal if Bar does not map to a schema simple type * </pre> * </li> * <li> If the type of the field or the property is a non * collection type, then the type of the property or field * must map to a simple schema type. * <pre> * // Examples * @XmlAttribute int foo; // legal * @XmlAttribute Foo foo; // illegal if Foo does not map to a schema simple type * </pre> * </li> * <li> This annotation can be used with the following annotations: * {@link XmlID}, * {@link XmlIDREF}, * {@link XmlList}, * {@link XmlSchemaType}, * {@link XmlValue}, * {@link XmlAttachmentRef}, * {@link XmlMimeType}, * {@link XmlInlineBinaryData}, * {@link javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter}</li>. * </ul> * </p> * * <p> <b>Example 1: </b>Map a JavaBean property to an XML attribute.</p> * <pre> * //Example: Code fragment * public class USPrice { * @XmlAttribute * public java.math.BigDecimal getPrice() {...} ; * public void setPrice(java.math.BigDecimal ) {...}; * } * * <!-- Example: XML Schema fragment --> * <xs:complexType name="USPrice"> * <xs:sequence> * </xs:sequence> * <xs:attribute name="price" type="xs:decimal"/> * </xs:complexType> * </pre> * * <p> <b>Example 2: </b>Map a JavaBean property to an XML attribute with anonymous type.</p> * See Example 7 in @{@link XmlType}. * * <p> <b>Example 3: </b>Map a JavaBean collection property to an XML attribute.</p> * <pre> * // Example: Code fragment * class Foo { * ... * @XmlAttribute List<Integer> items; * } * * <!-- Example: XML Schema fragment --> * <xs:complexType name="foo"> * ... * <xs:attribute name="items"> * <xs:simpleType> * <xs:list itemType="xs:int"/> * </xs:simpleType> * </xs:complexType> * * </pre> * @author Sekhar Vajjhala, Sun Microsystems, Inc. * @version $Revision: 1.13 $ * @see XmlType * @since JAXB2.0 */ @Retention(RUNTIME) @Target({FIELD, METHOD}) public @interface XmlAttribute { /** * Name of the XML Schema attribute. By default, the XML Schema * attribute name is derived from the JavaBean property name. * */ String name() default "##default"; /** * Specifies if the XML Schema attribute is optional or * required. If true, then the JavaBean property is mapped to a * XML Schema attribute that is required. Otherwise it is mapped * to a XML Schema attribute that is optional. * */ boolean required() default false; /** * Specifies the XML target namespace of the XML Schema * attribute. * */ String namespace() default "##default" ; }