src/share/jaxws_classes/javax/xml/bind/annotation/XmlElementDecl.java

Thu, 31 Aug 2017 15:18:52 +0800

author
aoqi
date
Thu, 31 Aug 2017 15:18:52 +0800
changeset 637
9c07ef4934dd
parent 397
b99d7e355d4b
parent 0
373ffda63c9a
permissions
-rw-r--r--

merge

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 java.lang.annotation.Retention;
aoqi@0 29 import java.lang.annotation.Target;
aoqi@0 30
aoqi@0 31 import static java.lang.annotation.RetentionPolicy.RUNTIME;
aoqi@0 32 import static java.lang.annotation.ElementType.METHOD;
aoqi@0 33
aoqi@0 34 /**
aoqi@0 35 * Maps a factory method to a XML element.
aoqi@0 36 *
aoqi@0 37 * <p> <b>Usage</b> </p>
aoqi@0 38 *
aoqi@0 39 * The annotation creates a mapping between an XML schema element
aoqi@0 40 * declaration and a <i> element factory method </i> that returns a
aoqi@0 41 * JAXBElement instance representing the element
aoqi@0 42 * declaration. Typically, the element factory method is generated
aoqi@0 43 * (and annotated) from a schema into the ObjectFactory class in a
aoqi@0 44 * Java package that represents the binding of the element
aoqi@0 45 * declaration's target namespace. Thus, while the annotation syntax
aoqi@0 46 * allows &#64;XmlElementDecl to be used on any method, semantically
aoqi@0 47 * its use is restricted to annotation of element factory method.
aoqi@0 48 *
aoqi@0 49 * The usage is subject to the following constraints:
aoqi@0 50 *
aoqi@0 51 * <ul>
aoqi@0 52 * <li> The class containing the element factory method annotated
aoqi@0 53 * with &#64;XmlElementDecl must be marked with {@link
aoqi@0 54 * XmlRegistry}. </li>
aoqi@0 55 * <li> The element factory method must take one parameter
aoqi@0 56 * assignable to {@link Object}.</li>
aoqi@0 57 * </ul>
aoqi@0 58 *
aoqi@0 59 * <p><b>Example 1: </b>Annotation on a factory method
aoqi@0 60 * <pre>
aoqi@0 61 * // Example: code fragment
aoqi@0 62 * &#64;XmlRegistry
aoqi@0 63 * class ObjectFactory {
aoqi@0 64 * &#64;XmlElementDecl(name="foo")
aoqi@0 65 * JAXBElement&lt;String> createFoo(String s) { ... }
aoqi@0 66 * }
aoqi@0 67 * </pre>
aoqi@0 68 * <pre>
aoqi@0 69 * &lt;!-- XML input -->
aoqi@0 70 * &lt;foo>string</foo>
aoqi@0 71 *
aoqi@0 72 * // Example: code fragment corresponding to XML input
aoqi@0 73 * JAXBElement<String> o =
aoqi@0 74 * (JAXBElement<String>)unmarshaller.unmarshal(aboveDocument);
aoqi@0 75 * // print JAXBElement instance to show values
aoqi@0 76 * System.out.println(o.getName()); // prints "{}foo"
aoqi@0 77 * System.out.println(o.getValue()); // prints "string"
aoqi@0 78 * System.out.println(o.getValue().getClass()); // prints "java.lang.String"
aoqi@0 79 *
aoqi@0 80 * &lt;!-- Example: XML schema definition -->
aoqi@0 81 * &lt;xs:element name="foo" type="xs:string"/>
aoqi@0 82 * </pre>
aoqi@0 83 *
aoqi@0 84 * <p><b>Example 2: </b> Element declaration with non local scope
aoqi@0 85 * <p>
aoqi@0 86 * The following example illustrates the use of scope annotation
aoqi@0 87 * parameter in binding of element declaration in schema derived
aoqi@0 88 * code.
aoqi@0 89 * <p>
aoqi@0 90 * The following example may be replaced in a future revision of
aoqi@0 91 * this javadoc.
aoqi@0 92 *
aoqi@0 93 * <pre>
aoqi@0 94 * &lt;!-- Example: XML schema definition -->
aoqi@0 95 * &lt;xs:schema>
aoqi@0 96 * &lt;xs:complexType name="pea">
aoqi@0 97 * &lt;xs:choice maxOccurs="unbounded">
aoqi@0 98 * &lt;xs:element name="foo" type="xs:string"/>
aoqi@0 99 * &lt;xs:element name="bar" type="xs:string"/>
aoqi@0 100 * &lt;/xs:choice>
aoqi@0 101 * &lt;/xs:complexType>
aoqi@0 102 * &lt;xs:element name="foo" type="xs:int"/>
aoqi@0 103 * &lt;/xs:schema>
aoqi@0 104 * </pre>
aoqi@0 105 * <pre>
aoqi@0 106 * // Example: expected default binding
aoqi@0 107 * class Pea {
aoqi@0 108 * &#64;XmlElementRefs({
aoqi@0 109 * &#64;XmlElementRef(name="foo",type=JAXBElement.class)
aoqi@0 110 * &#64;XmlElementRef(name="bar",type=JAXBElement.class)
aoqi@0 111 * })
aoqi@0 112 * List&lt;JAXBElement&lt;String>> fooOrBar;
aoqi@0 113 * }
aoqi@0 114 *
aoqi@0 115 * &#64;XmlRegistry
aoqi@0 116 * class ObjectFactory {
aoqi@0 117 * &#64;XmlElementDecl(scope=Pea.class,name="foo")
aoqi@0 118 * JAXBElement<String> createPeaFoo(String s);
aoqi@0 119 *
aoqi@0 120 * &#64;XmlElementDecl(scope=Pea.class,name="bar")
aoqi@0 121 * JAXBElement<String> createPeaBar(String s);
aoqi@0 122 *
aoqi@0 123 * &#64;XmlElementDecl(name="foo")
aoqi@0 124 * JAXBElement<Integer> createFoo(Integer i);
aoqi@0 125 * }
aoqi@0 126 *
aoqi@0 127 * </pre>
aoqi@0 128 * Without scope createFoo and createPeaFoo would become ambiguous
aoqi@0 129 * since both of them map to a XML schema element with the same local
aoqi@0 130 * name "foo".
aoqi@0 131 *
aoqi@0 132 * @see XmlRegistry
aoqi@0 133 * @since JAXB 2.0
aoqi@0 134 */
aoqi@0 135 @Retention(RUNTIME)
aoqi@0 136 @Target({METHOD})
aoqi@0 137 public @interface XmlElementDecl {
aoqi@0 138 /**
aoqi@0 139 * scope of the mapping.
aoqi@0 140 *
aoqi@0 141 * <p>
aoqi@0 142 * If this is not {@link XmlElementDecl.GLOBAL}, then this element
aoqi@0 143 * declaration mapping is only active within the specified class.
aoqi@0 144 */
aoqi@0 145 Class scope() default GLOBAL.class;
aoqi@0 146
aoqi@0 147 /**
aoqi@0 148 * namespace name of the XML element.
aoqi@0 149 * <p>
aoqi@0 150 * If the value is "##default", then the value is the namespace
aoqi@0 151 * name for the package of the class containing this factory method.
aoqi@0 152 *
aoqi@0 153 * @see #name()
aoqi@0 154 */
aoqi@0 155 String namespace() default "##default";
aoqi@0 156
aoqi@0 157 /**
aoqi@0 158 * local name of the XML element.
aoqi@0 159 *
aoqi@0 160 * <p>
aoqi@0 161 * <b> Note to reviewers: </b> There is no default name; since
aoqi@0 162 * the annotation is on a factory method, it is not clear that the
aoqi@0 163 * method name can be derived from the factory method name.
aoqi@0 164 * @see #namespace()
aoqi@0 165 */
aoqi@0 166 String name();
aoqi@0 167
aoqi@0 168 /**
aoqi@0 169 * namespace name of a substitution group's head XML element.
aoqi@0 170 * <p>
aoqi@0 171 * This specifies the namespace name of the XML element whose local
aoqi@0 172 * name is specified by <tt>substitutionHeadName()</tt>.
aoqi@0 173 * <p>
aoqi@0 174 * If <tt>susbtitutionHeadName()</tt> is "", then this
aoqi@0 175 * value can only be "##default". But the value is ignored since
aoqi@0 176 * since this element is not part of susbtitution group when the
aoqi@0 177 * value of <tt>susbstitutionHeadName()</tt> is "".
aoqi@0 178 * <p>
aoqi@0 179 * If <tt>susbtitutionHeadName()</tt> is not "" and the value is
aoqi@0 180 * "##default", then the namespace name is the namespace name to
aoqi@0 181 * which the package of the containing class, marked with {@link
aoqi@0 182 * XmlRegistry }, is mapped.
aoqi@0 183 * <p>
aoqi@0 184 * If <tt>susbtitutionHeadName()</tt> is not "" and the value is
aoqi@0 185 * not "##default", then the value is the namespace name.
aoqi@0 186 *
aoqi@0 187 * @see #substitutionHeadName()
aoqi@0 188 */
aoqi@0 189 String substitutionHeadNamespace() default "##default";
aoqi@0 190
aoqi@0 191 /**
aoqi@0 192 * XML local name of a substitution group's head element.
aoqi@0 193 * <p>
aoqi@0 194 * If the value is "", then this element is not part of any
aoqi@0 195 * substitution group.
aoqi@0 196 *
aoqi@0 197 * @see #substitutionHeadNamespace()
aoqi@0 198 */
aoqi@0 199 String substitutionHeadName() default "";
aoqi@0 200
aoqi@0 201 /**
aoqi@0 202 * Default value of this element.
aoqi@0 203 *
aoqi@0 204 * <p>
aoqi@0 205 * The <pre>'\u0000'</pre> value specified as a default of this annotation element
aoqi@0 206 * is used as a poor-man's substitute for null to allow implementations
aoqi@0 207 * to recognize the 'no default value' state.
aoqi@0 208 */
aoqi@0 209 String defaultValue() default "\u0000";
aoqi@0 210
aoqi@0 211 /**
aoqi@0 212 * Used in {@link XmlElementDecl#scope()} to
aoqi@0 213 * signal that the declaration is in the global scope.
aoqi@0 214 */
aoqi@0 215 public final class GLOBAL {}
aoqi@0 216 }

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