1 /*
   2  * Copyright (c) 1997, 2011, 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.generator.bean.field;
  27 
  28 import com.sun.codemodel.internal.JBlock;
  29 import com.sun.codemodel.internal.JCodeModel;
  30 import com.sun.codemodel.internal.JExpr;
  31 import com.sun.codemodel.internal.JExpression;
  32 import com.sun.codemodel.internal.JType;
  33 import com.sun.codemodel.internal.JVar;
  34 import com.sun.tools.internal.xjc.generator.bean.ClassOutlineImpl;
  35 import com.sun.tools.internal.xjc.generator.bean.MethodWriter;
  36 import com.sun.tools.internal.xjc.model.CPropertyInfo;
  37 import com.sun.tools.internal.xjc.outline.FieldAccessor;
  38 import com.sun.tools.internal.xjc.outline.FieldOutline;
  39 
  40 /**
  41  *
  42  *
  43  * @author
  44  *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
  45  */
  46 public class IsSetField extends AbstractField {
  47 
  48     private final FieldOutline core;
  49 
  50     private final boolean generateUnSetMethod;
  51     private final boolean generateIsSetMethod;
  52 
  53     protected IsSetField( ClassOutlineImpl outline, CPropertyInfo prop,
  54             FieldOutline core, boolean unsetMethod, boolean issetMethod ) {
  55         super(outline,prop);
  56         this.core = core;
  57         this.generateIsSetMethod = issetMethod;
  58         this.generateUnSetMethod = unsetMethod;
  59 
  60         generate(outline,prop);
  61     }
  62 
  63 
  64     private void generate( ClassOutlineImpl outline, CPropertyInfo prop ) {
  65         // add isSetXXX and unsetXXX.
  66         MethodWriter writer = outline.createMethodWriter();
  67 
  68         JCodeModel codeModel = outline.parent().getCodeModel();
  69 
  70         FieldAccessor acc = core.create(JExpr._this());
  71 
  72         if( generateIsSetMethod ) {
  73             // [RESULT] boolean isSetXXX()
  74             JExpression hasSetValue = acc.hasSetValue();
  75             if( hasSetValue==null ) {
  76                 // this field renderer doesn't support the isSet/unset methods generation.
  77                 // issue an error
  78                 throw new UnsupportedOperationException();
  79             }
  80             writer.declareMethod(codeModel.BOOLEAN,"isSet"+this.prop.getName(true))
  81                 .body()._return( hasSetValue );
  82         }
  83 
  84         if( generateUnSetMethod ) {
  85             // [RESULT] void unsetXXX()
  86             acc.unsetValues(
  87                 writer.declareMethod(codeModel.VOID,"unset"+this.prop.getName(true)).body() );
  88         }
  89     }
  90 
  91     public JType getRawType() {
  92         return core.getRawType();
  93     }
  94 
  95     public FieldAccessor create(JExpression targetObject) {
  96         return new Accessor(targetObject);
  97     }
  98 
  99     private class Accessor extends AbstractField.Accessor {
 100 
 101         private final FieldAccessor core;
 102 
 103         Accessor( JExpression $target ) {
 104             super($target);
 105             this.core = IsSetField.this.core.create($target);
 106         }
 107 
 108 
 109         public void unsetValues( JBlock body ) {
 110             core.unsetValues(body);
 111         }
 112         public JExpression hasSetValue() {
 113             return core.hasSetValue();
 114         }
 115         public void toRawValue(JBlock block, JVar $var) {
 116             core.toRawValue(block,$var);
 117         }
 118 
 119         public void fromRawValue(JBlock block, String uniqueName, JExpression $var) {
 120             core.fromRawValue(block,uniqueName,$var);
 121         }
 122     }
 123 }