1 /*
   2  * Copyright (c) 1997, 2014, 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.tools.internal.xjc.api.impl.s2j;
  27 
  28 import javax.xml.bind.JAXBElement;
  29 import javax.xml.namespace.QName;
  30 
  31 import com.sun.tools.internal.xjc.outline.FieldOutline;
  32 import com.sun.tools.internal.xjc.outline.ClassOutline;
  33 import com.sun.tools.internal.xjc.outline.FieldAccessor;
  34 import com.sun.tools.internal.xjc.outline.Outline;
  35 import com.sun.tools.internal.xjc.model.CPropertyInfo;
  36 import com.sun.tools.internal.xjc.model.CElementInfo;
  37 import com.sun.tools.internal.xjc.model.CReferencePropertyInfo;
  38 import com.sun.codemodel.internal.JExpression;
  39 import com.sun.codemodel.internal.JBlock;
  40 import com.sun.codemodel.internal.JExpr;
  41 import com.sun.codemodel.internal.JCodeModel;
  42 import com.sun.codemodel.internal.JInvocation;
  43 
  44 /**
  45  * {@link FieldOutline} that wraps another {@link FieldOutline}
  46  * and allows JAX-WS to access values without using about
  47  * {@link JAXBElement}.
  48  *
  49  * <p>
  50  * That means if a value is requested, we unwrap JAXBElement
  51  * and give it to them. If a value is set, we wrap that into
  52  * JAXBElement, etc.
  53  *
  54  * <p>
  55  * This can be used only with {@link CReferencePropertyInfo}
  56  * (or else it won't be {@link JAXBElement),
  57  * with one {@link CElementInfo} (or else we can't infer the tag name.)
  58  *
  59  * @author Kohsuke Kawaguchi
  60  */
  61 abstract class ElementAdapter implements FieldOutline {
  62     protected final FieldOutline core;
  63 
  64     /**
  65      * The only one {@link CElementInfo} that can be in the property.
  66      */
  67     protected final CElementInfo ei;
  68 
  69     public ElementAdapter(FieldOutline core, CElementInfo ei) {
  70         this.core = core;
  71         this.ei = ei;
  72     }
  73 
  74     public ClassOutline parent() {
  75         return core.parent();
  76     }
  77 
  78     public CPropertyInfo getPropertyInfo() {
  79         return core.getPropertyInfo();
  80     }
  81 
  82     protected final Outline outline() {
  83         return core.parent().parent();
  84     }
  85 
  86     protected final JCodeModel codeModel() {
  87         return outline().getCodeModel();
  88     }
  89 
  90     protected abstract class FieldAccessorImpl implements FieldAccessor {
  91         final FieldAccessor acc;
  92 
  93         public FieldAccessorImpl(JExpression target) {
  94             acc = core.create(target);
  95         }
  96 
  97         public void unsetValues(JBlock body) {
  98             acc.unsetValues(body);
  99         }
 100 
 101         public JExpression hasSetValue() {
 102             return acc.hasSetValue();
 103         }
 104 
 105         public FieldOutline owner() {
 106             return ElementAdapter.this;
 107         }
 108 
 109         public CPropertyInfo getPropertyInfo() {
 110             return core.getPropertyInfo();
 111         }
 112 
 113         /**
 114          * Wraps a type value into a {@link JAXBElement}.
 115          */
 116         protected final JInvocation createJAXBElement(JExpression $var) {
 117             JCodeModel cm = codeModel();
 118 
 119             return JExpr._new(cm.ref(JAXBElement.class))
 120                 .arg(JExpr._new(cm.ref(QName.class))
 121                     .arg(ei.getElementName().getNamespaceURI())
 122                     .arg(ei.getElementName().getLocalPart()))
 123                 .arg(getRawType().boxify().erasure().dotclass())
 124                 .arg($var);
 125         }
 126     }
 127 }