Wed, 27 Apr 2016 01:27:09 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/jaxws/
changeset: 657:d47a47f961ee
tag: jdk8u25-b17
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package javax.xml.bind.annotation; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter; |
aoqi@0 | 29 | import java.lang.annotation.Retention; |
aoqi@0 | 30 | import java.lang.annotation.Target; |
aoqi@0 | 31 | |
aoqi@0 | 32 | import static java.lang.annotation.RetentionPolicy.RUNTIME; |
aoqi@0 | 33 | import static java.lang.annotation.ElementType.FIELD; |
aoqi@0 | 34 | import static java.lang.annotation.ElementType.METHOD; |
aoqi@0 | 35 | |
aoqi@0 | 36 | /** |
aoqi@0 | 37 | * <p> |
aoqi@0 | 38 | * Maps a JavaBean property to a XML element derived from property's type. |
aoqi@0 | 39 | * <p> |
aoqi@0 | 40 | * <b>Usage</b> |
aoqi@0 | 41 | * <p> |
aoqi@0 | 42 | * <tt>@XmlElementRef</tt> annotation can be used with a |
aoqi@0 | 43 | * JavaBean property or from within {@link XmlElementRefs} |
aoqi@0 | 44 | * <p> |
aoqi@0 | 45 | * This annotation dynamically associates an XML element name with the JavaBean |
aoqi@0 | 46 | * property. When a JavaBean property is annotated with {@link |
aoqi@0 | 47 | * XmlElement}, the XML element name is statically derived from the |
aoqi@0 | 48 | * JavaBean property name. However, when this annotation is used, the |
aoqi@0 | 49 | * XML element name is derived from the instance of the type of the |
aoqi@0 | 50 | * JavaBean property at runtime. |
aoqi@0 | 51 | * |
aoqi@0 | 52 | * <h3> XML Schema substitution group support </h3> |
aoqi@0 | 53 | * XML Schema allows a XML document author to use XML element names |
aoqi@0 | 54 | * that were not statically specified in the content model of a |
aoqi@0 | 55 | * schema using substitution groups. Schema derived code provides |
aoqi@0 | 56 | * support for substitution groups using an <i>element property</i>, |
aoqi@0 | 57 | * (section 5.5.5, "Element Property" of JAXB 2.0 specification). An |
aoqi@0 | 58 | * element property method signature is of the form: |
aoqi@0 | 59 | * <pre> |
aoqi@0 | 60 | * public void setTerm(JAXBElement<? extends Operator>); |
aoqi@0 | 61 | * public JAXBElement<? extends Operator> getTerm(); |
aoqi@0 | 62 | * </pre> |
aoqi@0 | 63 | * <p> |
aoqi@0 | 64 | * An element factory method annotated with {@link XmlElementDecl} is |
aoqi@0 | 65 | * used to create a <tt>JAXBElement</tt> instance, containing an XML |
aoqi@0 | 66 | * element name. The presence of @XmlElementRef annotation on an |
aoqi@0 | 67 | * element property indicates that the element name from <tt>JAXBElement</tt> |
aoqi@0 | 68 | * instance be used instead of deriving an XML element name from the |
aoqi@0 | 69 | * JavaBean property name. |
aoqi@0 | 70 | * |
aoqi@0 | 71 | * <p> |
aoqi@0 | 72 | * The usage is subject to the following constraints: |
aoqi@0 | 73 | * <ul> |
aoqi@0 | 74 | * <li> If the collection item type (for collection property) or |
aoqi@0 | 75 | * property type (for single valued property) is |
aoqi@0 | 76 | * {@link javax.xml.bind.JAXBElement}, then |
aoqi@0 | 77 | * <tt>@XmlElementRef}.name()</tt> and <tt>@XmlElementRef.namespace()</tt> must |
aoqi@0 | 78 | * point an element factory method with an @XmlElementDecl |
aoqi@0 | 79 | * annotation in a class annotated with @XmlRegistry (usually |
aoqi@0 | 80 | * ObjectFactory class generated by the schema compiler) : |
aoqi@0 | 81 | * <ul> |
aoqi@0 | 82 | * <li> @XmlElementDecl.name() must equal @XmlElementRef.name() </li> |
aoqi@0 | 83 | * <li> @XmlElementDecl.namespace() must equal @XmlElementRef.namespace(). </li> |
aoqi@0 | 84 | * </ul> |
aoqi@0 | 85 | * </li> |
aoqi@0 | 86 | * <li> If the collection item type (for collection property) or |
aoqi@0 | 87 | * property type (for single valued property) is not |
aoqi@0 | 88 | * {@link javax.xml.bind.JAXBElement}, then the type referenced by the |
aoqi@0 | 89 | * property or field must be annotated with {@link XmlRootElement}. </li> |
aoqi@0 | 90 | * <li> This annotation can be used with the following annotations: |
aoqi@0 | 91 | * {@link XmlElementWrapper}, {@link XmlJavaTypeAdapter}. |
aoqi@0 | 92 | * </ul> |
aoqi@0 | 93 | * |
aoqi@0 | 94 | * <p>See "Package Specification" in javax.xml.bind.package javadoc for |
aoqi@0 | 95 | * additional common information.</p> |
aoqi@0 | 96 | * |
aoqi@0 | 97 | * <p><b>Example 1: Ant Task Example</b></p> |
aoqi@0 | 98 | * The following Java class hierarchy models an Ant build |
aoqi@0 | 99 | * script. An Ant task corresponds to a class in the class |
aoqi@0 | 100 | * hierarchy. The XML element name of an Ant task is indicated by the |
aoqi@0 | 101 | * @XmlRootElement annotation on its corresponding class. |
aoqi@0 | 102 | * <pre> |
aoqi@0 | 103 | * @XmlRootElement(name="target") |
aoqi@0 | 104 | * class Target { |
aoqi@0 | 105 | * // The presence of @XmlElementRef indicates that the XML |
aoqi@0 | 106 | * // element name will be derived from the @XmlRootElement |
aoqi@0 | 107 | * // annotation on the type (for e.g. "jar" for JarTask). |
aoqi@0 | 108 | * @XmlElementRef |
aoqi@0 | 109 | * List<Task> tasks; |
aoqi@0 | 110 | * } |
aoqi@0 | 111 | * |
aoqi@0 | 112 | * abstract class Task { |
aoqi@0 | 113 | * } |
aoqi@0 | 114 | * |
aoqi@0 | 115 | * @XmlRootElement(name="jar") |
aoqi@0 | 116 | * class JarTask extends Task { |
aoqi@0 | 117 | * ... |
aoqi@0 | 118 | * } |
aoqi@0 | 119 | * |
aoqi@0 | 120 | * @XmlRootElement(name="javac") |
aoqi@0 | 121 | * class JavacTask extends Task { |
aoqi@0 | 122 | * ... |
aoqi@0 | 123 | * } |
aoqi@0 | 124 | * |
aoqi@0 | 125 | * <!-- XML Schema fragment --> |
aoqi@0 | 126 | * <xs:element name="target" type="Target"> |
aoqi@0 | 127 | * <xs:complexType name="Target"> |
aoqi@0 | 128 | * <xs:sequence> |
aoqi@0 | 129 | * <xs:choice maxOccurs="unbounded"> |
aoqi@0 | 130 | * <xs:element ref="jar"> |
aoqi@0 | 131 | * <xs:element ref="javac"> |
aoqi@0 | 132 | * </xs:choice> |
aoqi@0 | 133 | * </xs:sequence> |
aoqi@0 | 134 | * </xs:complexType> |
aoqi@0 | 135 | * |
aoqi@0 | 136 | * </pre> |
aoqi@0 | 137 | * <p> |
aoqi@0 | 138 | * Thus the following code fragment: |
aoqi@0 | 139 | * <pre> |
aoqi@0 | 140 | * Target target = new Target(); |
aoqi@0 | 141 | * target.tasks.add(new JarTask()); |
aoqi@0 | 142 | * target.tasks.add(new JavacTask()); |
aoqi@0 | 143 | * marshal(target); |
aoqi@0 | 144 | * </pre> |
aoqi@0 | 145 | * will produce the following XML output: |
aoqi@0 | 146 | * <pre> |
aoqi@0 | 147 | * <target> |
aoqi@0 | 148 | * <jar> |
aoqi@0 | 149 | * .... |
aoqi@0 | 150 | * </jar> |
aoqi@0 | 151 | * <javac> |
aoqi@0 | 152 | * .... |
aoqi@0 | 153 | * </javac> |
aoqi@0 | 154 | * </target> |
aoqi@0 | 155 | * </pre> |
aoqi@0 | 156 | * <p> |
aoqi@0 | 157 | * It is not an error to have a class that extends <tt>Task</tt> |
aoqi@0 | 158 | * that doesn't have {@link XmlRootElement}. But they can't show up in an |
aoqi@0 | 159 | * XML instance (because they don't have XML element names). |
aoqi@0 | 160 | * |
aoqi@0 | 161 | * <p><b>Example 2: XML Schema Susbstitution group support</b> |
aoqi@0 | 162 | * <p> The following example shows the annotations for XML Schema |
aoqi@0 | 163 | * substitution groups. The annotations and the ObjectFactory are |
aoqi@0 | 164 | * derived from the schema. |
aoqi@0 | 165 | * |
aoqi@0 | 166 | * <pre> |
aoqi@0 | 167 | * @XmlElement |
aoqi@0 | 168 | * class Math { |
aoqi@0 | 169 | * // The value of {@link #type()}is |
aoqi@0 | 170 | * // JAXBElement.class , which indicates the XML |
aoqi@0 | 171 | * // element name ObjectFactory - in general a class marked |
aoqi@0 | 172 | * // with @XmlRegistry. (See ObjectFactory below) |
aoqi@0 | 173 | * // |
aoqi@0 | 174 | * // The {@link #name()} is "operator", a pointer to a |
aoqi@0 | 175 | * // factory method annotated with a |
aoqi@0 | 176 | * // {@link XmlElementDecl} with the name "operator". Since |
aoqi@0 | 177 | * // "operator" is the head of a substitution group that |
aoqi@0 | 178 | * // contains elements "add" and "sub" elements, "operator" |
aoqi@0 | 179 | * // element can be substituted in an instance document by |
aoqi@0 | 180 | * // elements "add" or "sub". At runtime, JAXBElement |
aoqi@0 | 181 | * // instance contains the element name that has been |
aoqi@0 | 182 | * // substituted in the XML document. |
aoqi@0 | 183 | * // |
aoqi@0 | 184 | * @XmlElementRef(type=JAXBElement.class,name="operator") |
aoqi@0 | 185 | * JAXBElement<? extends Operator> term; |
aoqi@0 | 186 | * } |
aoqi@0 | 187 | * |
aoqi@0 | 188 | * @XmlRegistry |
aoqi@0 | 189 | * class ObjectFactory { |
aoqi@0 | 190 | * @XmlElementDecl(name="operator") |
aoqi@0 | 191 | * JAXBElement<Operator> createOperator(Operator o) {...} |
aoqi@0 | 192 | * @XmlElementDecl(name="add",substitutionHeadName="operator") |
aoqi@0 | 193 | * JAXBElement<Operator> createAdd(Operator o) {...} |
aoqi@0 | 194 | * @XmlElementDecl(name="sub",substitutionHeadName="operator") |
aoqi@0 | 195 | * JAXBElement<Operator> createSub(Operator o) {...} |
aoqi@0 | 196 | * } |
aoqi@0 | 197 | * |
aoqi@0 | 198 | * class Operator { |
aoqi@0 | 199 | * ... |
aoqi@0 | 200 | * } |
aoqi@0 | 201 | * </pre> |
aoqi@0 | 202 | * <p> |
aoqi@0 | 203 | * Thus, the following code fragment |
aoqi@0 | 204 | * <pre> |
aoqi@0 | 205 | * Math m = new Math(); |
aoqi@0 | 206 | * m.term = new ObjectFactory().createAdd(new Operator()); |
aoqi@0 | 207 | * marshal(m); |
aoqi@0 | 208 | * </pre> |
aoqi@0 | 209 | * will produce the following XML output: |
aoqi@0 | 210 | * <pre> |
aoqi@0 | 211 | * <math> |
aoqi@0 | 212 | * <add>...</add> |
aoqi@0 | 213 | * </math> |
aoqi@0 | 214 | * </pre> |
aoqi@0 | 215 | * |
aoqi@0 | 216 | * |
aoqi@0 | 217 | * @author <ul><li>Kohsuke Kawaguchi, Sun Microsystems,Inc. </li><li>Sekhar Vajjhala, Sun Microsystems, Inc.</li></ul> |
aoqi@0 | 218 | * @see XmlElementRefs |
aoqi@0 | 219 | * @since JAXB2.0 |
aoqi@0 | 220 | */ |
aoqi@0 | 221 | @Retention(RUNTIME) |
aoqi@0 | 222 | @Target({FIELD,METHOD}) |
aoqi@0 | 223 | public @interface XmlElementRef { |
aoqi@0 | 224 | /** |
aoqi@0 | 225 | * The Java type being referenced. |
aoqi@0 | 226 | * <p> |
aoqi@0 | 227 | * If the value is DEFAULT.class, the type is inferred from the |
aoqi@0 | 228 | * the type of the JavaBean property. |
aoqi@0 | 229 | */ |
aoqi@0 | 230 | Class type() default DEFAULT.class; |
aoqi@0 | 231 | |
aoqi@0 | 232 | /** |
aoqi@0 | 233 | * This parameter and {@link #name()} are used to determine the |
aoqi@0 | 234 | * XML element for the JavaBean property. |
aoqi@0 | 235 | * |
aoqi@0 | 236 | * <p> If <tt>type()</tt> is <tt>JAXBElement.class</tt> , then |
aoqi@0 | 237 | * <tt>namespace()</tt> and <tt>name()</tt> |
aoqi@0 | 238 | * point to a factory method with {@link XmlElementDecl}. The XML |
aoqi@0 | 239 | * element name is the element name from the factory method's |
aoqi@0 | 240 | * {@link XmlElementDecl} annotation or if an element from its |
aoqi@0 | 241 | * substitution group (of which it is a head element) has been |
aoqi@0 | 242 | * substituted in the XML document, then the element name is from the |
aoqi@0 | 243 | * {@link XmlElementDecl} on the substituted element. |
aoqi@0 | 244 | * |
aoqi@0 | 245 | * <p> If {@link #type()} is not <tt>JAXBElement.class</tt>, then |
aoqi@0 | 246 | * the XML element name is the XML element name statically |
aoqi@0 | 247 | * associated with the type using the annotation {@link |
aoqi@0 | 248 | * XmlRootElement} on the type. If the type is not annotated with |
aoqi@0 | 249 | * an {@link XmlElementDecl}, then it is an error. |
aoqi@0 | 250 | * |
aoqi@0 | 251 | * <p> If <tt>type()</tt> is not <tt>JAXBElement.class</tt>, then |
aoqi@0 | 252 | * this value must be "". |
aoqi@0 | 253 | * |
aoqi@0 | 254 | */ |
aoqi@0 | 255 | String namespace() default ""; |
aoqi@0 | 256 | /** |
aoqi@0 | 257 | * |
aoqi@0 | 258 | * @see #namespace() |
aoqi@0 | 259 | */ |
aoqi@0 | 260 | String name() default "##default"; |
aoqi@0 | 261 | |
aoqi@0 | 262 | /** |
aoqi@0 | 263 | * Used in {@link XmlElementRef#type()} to |
aoqi@0 | 264 | * signal that the type be inferred from the signature |
aoqi@0 | 265 | * of the property. |
aoqi@0 | 266 | */ |
aoqi@0 | 267 | static final class DEFAULT {} |
aoqi@0 | 268 | |
aoqi@0 | 269 | /** |
aoqi@0 | 270 | * Customize the element declaration to be required. |
aoqi@0 | 271 | * <p> |
aoqi@0 | 272 | * If required() is true, then Javabean property is mapped to |
aoqi@0 | 273 | * an XML schema element declaration with minOccurs="1". |
aoqi@0 | 274 | * maxOccurs is "1" for a single valued property and "unbounded" |
aoqi@0 | 275 | * for a multivalued property. |
aoqi@0 | 276 | * |
aoqi@0 | 277 | * <p> |
aoqi@0 | 278 | * If required() is false, then the Javabean property is mapped |
aoqi@0 | 279 | * to XML Schema element declaration with minOccurs="0". |
aoqi@0 | 280 | * maxOccurs is "1" for a single valued property and "unbounded" |
aoqi@0 | 281 | * for a multivalued property. |
aoqi@0 | 282 | * |
aoqi@0 | 283 | * <p> |
aoqi@0 | 284 | * For compatibility with JAXB 2.1, this property defaults to <tt>true</tt>, |
aoqi@0 | 285 | * despite the fact that {@link XmlElement#required()} defaults to false. |
aoqi@0 | 286 | * |
aoqi@0 | 287 | * @since 2.2 |
aoqi@0 | 288 | */ |
aoqi@0 | 289 | boolean required() default true; |
aoqi@0 | 290 | } |