1 /*
   2  * Copyright (c) 1997, 2013, 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.reader.dtd.bindinfo;
  27 
  28 import java.io.IOException;
  29 import java.io.StringReader;
  30 import java.util.Map;
  31 
  32 import javax.xml.bind.annotation.adapters.XmlAdapter;
  33 import javax.xml.parsers.DocumentBuilderFactory;
  34 import javax.xml.parsers.ParserConfigurationException;
  35 
  36 import com.sun.codemodel.internal.JClass;
  37 import com.sun.codemodel.internal.JClassAlreadyExistsException;
  38 import com.sun.codemodel.internal.JCodeModel;
  39 import com.sun.codemodel.internal.JDefinedClass;
  40 import com.sun.codemodel.internal.JExpr;
  41 import com.sun.codemodel.internal.JExpression;
  42 import com.sun.codemodel.internal.JMethod;
  43 import com.sun.codemodel.internal.JMod;
  44 import com.sun.codemodel.internal.JPackage;
  45 import com.sun.codemodel.internal.JPrimitiveType;
  46 import com.sun.codemodel.internal.JType;
  47 import com.sun.codemodel.internal.JVar;
  48 import com.sun.tools.internal.xjc.model.CAdapter;
  49 import com.sun.tools.internal.xjc.model.CBuiltinLeafInfo;
  50 import com.sun.tools.internal.xjc.model.TypeUse;
  51 import com.sun.tools.internal.xjc.model.TypeUseFactory;
  52 
  53 import com.sun.xml.internal.bind.v2.util.XmlFactory;
  54 import org.w3c.dom.Element;
  55 import org.xml.sax.InputSource;
  56 import org.xml.sax.Locator;
  57 import org.xml.sax.SAXException;
  58 
  59 /**
  60  * <conversion> declaration in the binding file.
  61  * This declaration declares a conversion by user-specified methods.
  62  */
  63 public class BIUserConversion implements BIConversion
  64 {
  65     /**
  66      * Wraps a given <conversion> element in the binding file.
  67      */
  68     BIUserConversion( BindInfo bi, Element _e ) {
  69         this.owner = bi;
  70         this.e = _e;
  71     }
  72 
  73     private static void add( Map<String,BIConversion> m, BIConversion c ) {
  74         m.put( c.name(), c );
  75     }
  76 
  77     /** Adds all built-in conversions into the given map. */
  78     static void addBuiltinConversions( BindInfo bi, Map<String,BIConversion> m ) {
  79         add( m, new BIUserConversion( bi, parse("<conversion name='boolean' type='java.lang.Boolean' parse='getBoolean' />")));
  80         add( m, new BIUserConversion( bi, parse("<conversion name='byte' type='java.lang.Byte' parse='parseByte' />")));
  81         add( m, new BIUserConversion( bi, parse("<conversion name='short' type='java.lang.Short' parse='parseShort' />")));
  82         add( m, new BIUserConversion( bi, parse("<conversion name='int' type='java.lang.Integer' parse='parseInt' />")));
  83         add( m, new BIUserConversion( bi, parse("<conversion name='long' type='java.lang.Long' parse='parseLong' />")));
  84         add( m, new BIUserConversion( bi, parse("<conversion name='float' type='java.lang.Float' parse='parseFloat' />")));
  85         add( m, new BIUserConversion( bi, parse("<conversion name='double' type='java.lang.Double' parse='parseDouble' />")));
  86     }
  87 
  88     private static Element parse(String text) {
  89         try {
  90             //this is parsing well known schemas, do not configure secure processing - always true
  91             DocumentBuilderFactory dbf = XmlFactory.createDocumentBuilderFactory(false);
  92             InputSource is = new InputSource(new StringReader(text));
  93             return dbf.newDocumentBuilder().parse(is).getDocumentElement();
  94         } catch (SAXException x) {
  95             throw new Error(x);
  96         } catch (IOException x) {
  97             throw new Error(x);
  98         } catch (ParserConfigurationException x) {
  99             throw new Error(x);
 100         }
 101     }
 102 
 103 
 104     /** The owner {@link BindInfo} object to which this object belongs. */
 105     private final BindInfo owner;
 106 
 107     /** &lt;conversion> element which this object is wrapping. */
 108     private final Element e;
 109 
 110 
 111 
 112     /** Gets the location where this declaration is declared. */
 113     public Locator getSourceLocation() {
 114         return DOMLocator.getLocationInfo(e);
 115     }
 116 
 117     /** Gets the conversion name. */
 118     public String name() { return DOMUtil.getAttribute(e,"name"); }
 119 
 120     /** Gets a transducer for this conversion. */
 121     public TypeUse getTransducer() {
 122 
 123         String ws = DOMUtil.getAttribute(e,"whitespace");
 124         if(ws==null)    ws = "collapse";
 125 
 126         String type = DOMUtil.getAttribute(e,"type");
 127         if(type==null)  type=name();
 128         JType t=null;
 129 
 130         int idx = type.lastIndexOf('.');
 131         if(idx<0) {
 132             // no package name is specified.
 133             try {
 134                 t = JPrimitiveType.parse(owner.codeModel,type);
 135             } catch( IllegalArgumentException ex ) {
 136                 // otherwise treat it as a class name in the current package
 137                 type = owner.getTargetPackage().name()+'.'+type;
 138             }
 139         }
 140         if(t==null) {
 141             try {
 142                 // TODO: revisit this later
 143                 JDefinedClass cls = owner.codeModel._class(type);
 144                 cls.hide();
 145                 t = cls;
 146             } catch( JClassAlreadyExistsException ex ) {
 147                 t = ex.getExistingClass();
 148             }
 149         }
 150 
 151         String parse = DOMUtil.getAttribute(e,"parse");
 152         if(parse==null)  parse="new";
 153 
 154         String print = DOMUtil.getAttribute(e,"print");
 155         if(print==null)  print="toString";
 156 
 157         JDefinedClass adapter = generateAdapter(owner.codeModel, parse, print, t.boxify());
 158 
 159         // XmlJavaType customization always converts between string and an user-defined type.
 160         return TypeUseFactory.adapt(CBuiltinLeafInfo.STRING,new CAdapter(adapter));
 161     }
 162 
 163     // TODO: anyway to reuse this code between XML Schema compiler?
 164     private JDefinedClass generateAdapter(JCodeModel cm, String parseMethod, String printMethod, JClass inMemoryType) {
 165         JDefinedClass adapter = null;
 166 
 167         int id = 1;
 168         while(adapter==null) {
 169             try {
 170                 JPackage pkg = owner.getTargetPackage();
 171                 adapter = pkg._class("Adapter"+id);
 172             } catch (JClassAlreadyExistsException ex) {
 173                 // try another name in search for an unique name.
 174                 // this isn't too efficient, but we expect people to usually use
 175                 // a very small number of adapters.
 176                 id++;
 177             }
 178         }
 179 
 180         adapter._extends(cm.ref(XmlAdapter.class).narrow(String.class).narrow(inMemoryType));
 181 
 182         JMethod unmarshal = adapter.method(JMod.PUBLIC, inMemoryType, "unmarshal");
 183         JVar $value = unmarshal.param(String.class, "value");
 184 
 185         JExpression inv;
 186 
 187         if( parseMethod.equals("new") ) {
 188             // "new" indicates that the constructor of the target type
 189             // will do the unmarshalling.
 190 
 191             // RESULT: new <type>()
 192             inv = JExpr._new(inMemoryType).arg($value);
 193         } else {
 194             int idx = parseMethod.lastIndexOf('.');
 195             if(idx<0) {
 196                 // parseMethod specifies the static method of the target type
 197                 // which will do the unmarshalling.
 198 
 199                 // because of an error check at the constructor,
 200                 // we can safely assume that this cast works.
 201                 inv = inMemoryType.staticInvoke(parseMethod).arg($value);
 202             } else {
 203                 inv = JExpr.direct(parseMethod+"(value)");
 204             }
 205         }
 206         unmarshal.body()._return(inv);
 207 
 208 
 209         JMethod marshal = adapter.method(JMod.PUBLIC, String.class, "marshal");
 210         $value = marshal.param(inMemoryType,"value");
 211 
 212         int idx = printMethod.lastIndexOf('.');
 213         if(idx<0) {
 214             // printMethod specifies a method in the target type
 215             // which performs the serialization.
 216 
 217             // RESULT: <value>.<method>()
 218             inv = $value.invoke(printMethod);
 219         } else {
 220             // RESULT: <className>.<method>(<value>)
 221             inv = JExpr.direct(printMethod+"(value)");
 222         }
 223         marshal.body()._return(inv);
 224 
 225         return adapter;
 226     }
 227 }
--- EOF ---