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.impl;
  27 
  28 import java.util.Arrays;
  29 import java.util.Collection;
  30 import java.util.Map;
  31 
  32 import javax.xml.bind.annotation.XmlElementWrapper;
  33 import javax.xml.namespace.QName;
  34 
  35 import com.sun.xml.internal.bind.v2.model.core.MapPropertyInfo;
  36 import com.sun.xml.internal.bind.v2.model.core.NonElement;
  37 import com.sun.xml.internal.bind.v2.model.core.PropertyKind;
  38 import com.sun.xml.internal.bind.v2.model.core.TypeInfo;
  39 
  40 /**
  41  * @author Kohsuke Kawaguchi
  42  */
  43 class MapPropertyInfoImpl<T,C,F,M> extends PropertyInfoImpl<T,C,F,M> implements MapPropertyInfo<T,C> {
  44 
  45     private final QName xmlName;
  46     private boolean nil;
  47     private final T keyType;
  48     private final T valueType;
  49 
  50     // laziy computed to handle cyclic references
  51     private NonElement<T,C> keyTypeInfo;
  52     private NonElement<T,C> valueTypeInfo;
  53 
  54 
  55     public MapPropertyInfoImpl(ClassInfoImpl<T,C,F,M> ci, PropertySeed<T,C,F,M> seed) {
  56         super(ci, seed);
  57 
  58         XmlElementWrapper xe = seed.readAnnotation(XmlElementWrapper.class);
  59         xmlName = calcXmlName(xe);
  60         nil = xe!=null && xe.nillable();
  61 
  62         T raw = getRawType();
  63         T bt = nav().getBaseClass(raw, nav().asDecl(Map.class) );
  64         assert bt!=null;    // Map property is only for Maps
  65 
  66         if(nav().isParameterizedType(bt)) {
  67             keyType = nav().getTypeArgument(bt,0);
  68             valueType = nav().getTypeArgument(bt,1);
  69         } else {
  70             keyType = valueType = nav().ref(Object.class);
  71         }
  72     }
  73 
  74     public Collection<? extends TypeInfo<T,C>> ref() {
  75         return Arrays.asList(getKeyType(),getValueType());
  76     }
  77 
  78     public final PropertyKind kind() {
  79         return PropertyKind.MAP;
  80     }
  81 
  82     public QName getXmlName() {
  83         return xmlName;
  84     }
  85 
  86     public boolean isCollectionNillable() {
  87         return nil;
  88     }
  89 
  90     public NonElement<T,C> getKeyType() {
  91         if(keyTypeInfo==null)
  92             keyTypeInfo = getTarget(keyType);
  93         return keyTypeInfo;
  94     }
  95 
  96     public NonElement<T,C> getValueType() {
  97         if(valueTypeInfo==null)
  98             valueTypeInfo = getTarget(valueType);
  99         return valueTypeInfo;
 100     }
 101 
 102     public NonElement<T,C> getTarget(T type) {
 103         assert parent.builder!=null : "this method must be called during the build stage";
 104         return parent.builder.getTypeInfo(type,this);
 105     }
 106 }