jakarta.xml.bind.annotation.XmlAttribute Maven / Gradle / Ivy
/*
* Copyright (c) 2004, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package jakarta.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.*;
/**
*
* Maps a JavaBean property to a XML attribute.
*
*
Usage
*
* The {@code @XmlAttribute} annotation can be used with the
* following program elements:
*
* - JavaBean property
* - field
*
*
* A static final field is mapped to a XML fixed attribute.
*
*
See "Package Specification" in jakarta.xml.bind.package javadoc for
* additional common information.
*
* The usage is subject to the following constraints:
*
* - If type of the field or the property is a collection
* type, then the collection item type must be mapped to schema
* simple type.
*
* // Examples
* @XmlAttribute List<Integer> items; //legal
* @XmlAttribute List<Bar> foo; // illegal if Bar does not map to a schema simple type
*
*
* - 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.
*
* // Examples
* @XmlAttribute int foo; // legal
* @XmlAttribute Foo foo; // illegal if Foo does not map to a schema simple type
*
*
* - 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 jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter}.
*
*
* Example 1: Map a JavaBean property to an XML attribute.
*
* //Example: Code fragment
* public class USPrice {
* @XmlAttribute
* public java.math.BigDecimal getPrice() {...} ;
* public void setPrice(java.math.BigDecimal ) {...};
* }
* {@code
*
*
*
*
*
*
* }
*
* Example 2: Map a JavaBean property to an XML attribute with anonymous type.
* See Example 7 in @{@link XmlType}.
*
* Example 3: Map a JavaBean collection property to an XML attribute.
*
* // Example: Code fragment
* class Foo {
* ...
* @XmlAttribute List<Integer> items;
* }
* {@code
*
*
*
* ...
*
*
*
*
*
* }
* @author Sekhar Vajjhala, Sun Microsystems, Inc.
* @see XmlType
* @since 1.6, JAXB 2.0
*/
@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" ;
}