1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.bind.v2.model.core;
  27 
  28 import javax.xml.bind.annotation.adapters.XmlAdapter;
  29 import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
  30 
  31 import com.sun.xml.internal.bind.v2.model.annotation.AnnotationReader;
  32 import com.sun.xml.internal.bind.v2.model.nav.Navigator;
  33 
  34 /**
  35  * {@link Adapter} that wraps {@link XmlJavaTypeAdapter}.
  36  *
  37  * @author Kohsuke Kawaguchi
  38  */
  39 public class Adapter<TypeT,ClassDeclT> {
  40     /**
  41      * The adapter class. Always non-null.
  42      *
  43      * A class that derives from {@link javax.xml.bind.annotation.adapters.XmlAdapter}.
  44      */
  45     public final ClassDeclT adapterType;
  46 
  47     /**
  48      * The type that the JAXB can handle natively.
  49      * The {@code Default} parameter of {@code XmlAdapter<Default,Custom>}.
  50      *
  51      * Always non-null.
  52      */
  53     public final TypeT defaultType;
  54 
  55     /**
  56      * The type that is stored in memory.
  57      * The {@code Custom} parameter of {@code XmlAdapter<Default,Custom>}.
  58      */
  59     public final TypeT customType;
  60 
  61 
  62 
  63     public Adapter(
  64         XmlJavaTypeAdapter spec,
  65         AnnotationReader<TypeT,ClassDeclT,?,?> reader,
  66         Navigator<TypeT,ClassDeclT,?,?> nav) {
  67 
  68         this( nav.asDecl(reader.getClassValue(spec,"value")), nav );
  69     }
  70 
  71     public Adapter(ClassDeclT adapterType,Navigator<TypeT,ClassDeclT,?,?> nav) {
  72         this.adapterType = adapterType;
  73         TypeT baseClass = nav.getBaseClass(nav.use(adapterType), nav.asDecl(XmlAdapter.class));
  74 
  75         // because the parameterization of XmlJavaTypeAdapter requires that the class derives from XmlAdapter.
  76         assert baseClass!=null;
  77 
  78         if(nav.isParameterizedType(baseClass))
  79             defaultType = nav.getTypeArgument(baseClass,0);
  80         else
  81             defaultType = nav.ref(Object.class);
  82 
  83         if(nav.isParameterizedType(baseClass))
  84             customType = nav.getTypeArgument(baseClass,1);
  85         else
  86             customType = nav.ref(Object.class);
  87     }
  88 }