bundles/org.simantics.databoard/src/org/simantics/databoard/method/MethodTypeBinding.java

   1 /*******************************************************************************
   2  *  Copyright (c) 2010 Association for Decentralized Information Management in
   3  *  Industry THTH ry.
   4  *  All rights reserved. This program and the accompanying materials
   5  *  are made available under the terms of the Eclipse Public License v1.0
   6  *  which accompanies this distribution, and is available at
   7  *  http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  *  Contributors:
  10  *      VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.databoard.method;
  13
  14 import org.simantics.databoard.Methods;
  15 import org.simantics.databoard.binding.Binding;
  16 import org.simantics.databoard.binding.RecordBinding;
  17 import org.simantics.databoard.binding.UnionBinding;
  18
  19 /**
  20  * MethodTypeBinding is a binding of MethodType (Request, Response and Error data types)
  21  * to a Java Class.
  22  *
  23  * @see Methods#getMethodTypeBinding(java.lang.reflect.Method)
  24  * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
  25  */
  26 public class MethodTypeBinding {
  27
  28         MethodTypeDefinition methodDefinition;
  29
  30         RecordBinding requestBinding;
  31         Binding responseBinding;
  32         UnionBinding errorBinding;
  33
  34         public MethodTypeBinding(String methodName, RecordBinding requestBinding, Binding responseBinding, UnionBinding errorBinding)
  35         {
  36                 if (methodName==null||requestBinding==null||responseBinding==null||errorBinding==null)
  37                         throw new IllegalArgumentException("null arg");
  38                 this.methodDefinition = new MethodTypeDefinition(methodName, new MethodType(requestBinding.type(), responseBinding.type(), errorBinding.type()));
  39                 this.requestBinding = requestBinding;
  40                 this.responseBinding = responseBinding;
  41                 this.errorBinding = errorBinding;
  42         }
  43
  44         public MethodTypeBinding(MethodTypeDefinition methodDescription, RecordBinding requestBinding, Binding responseBinding, UnionBinding errorBinding)
  45         {
  46                 if (methodDescription==null||requestBinding==null||responseBinding==null||errorBinding==null)
  47                         throw new IllegalArgumentException("null arg");
  48                 this.methodDefinition = methodDescription;
  49                 this.requestBinding = requestBinding;
  50                 this.responseBinding = responseBinding;
  51                 this.errorBinding = errorBinding;
  52         }
  53
  54         public MethodTypeDefinition getMethodDefinition() {
  55                 return methodDefinition;
  56         }
  57
  58         public MethodType getMethodType() {
  59                 return methodDefinition.getType();
  60         }
  61
  62         public String getName() {
  63                 return methodDefinition.getName();
  64         }
  65
  66         public RecordBinding getRequestBinding() {
  67                 return requestBinding;
  68         }
  69
  70         public Binding getResponseBinding() {
  71                 return responseBinding;
  72         }
  73
  74         public UnionBinding getErrorBinding() {
  75                 return errorBinding;
  76         }
  77         /*
  78         // Puts error classes into an union type
  79         public static Binding error(final Class<?>...errorClasses)
  80         {
  81                 UnionType ut = new UnionType();
  82                 UnionBinding ub = new UnionBinding() {
  83                         @Override
  84                         public Object create(int tag, Object value)
  85                         throws BindingException {
  86                                 return value;
  87                         }
  88                         @Override
  89                         public int getTag(Object obj) throws BindingException {
  90                                 for (int i=0; i<errorClasses.length; i++)
  91                                         if (errorClasses[i].isInstance(obj))
  92                                                 return i;
  93                                 throw new BindingException("pl");
  94                         }
  95                         @Override
  96                         public Object getValue(Object obj) throws BindingException {
  97                                 return obj;
  98                         }
  99                         @Override
 100                         public boolean isInstance(Object obj) {
 101                                 for (Class<?> clazz : errorClasses)
 102                                         if (clazz.isInstance(obj))
 103                                                 return true;
 104                                 return false;
 105                         }};
 106                 ub.type = ut;
 107                 ub.componentBindings = new Binding[errorClasses.length];
 108                 ut.components = new Component[errorClasses.length];
 109                 for (int i=0; i<errorClasses.length; i++)
 110                 {
 111                         Component c = new Component();
 112                         c.name = errorClasses[i].getName();
 113                         c.type = DataTypes.getDataType(errorClasses[i]);
 114                         ut.components[i] = c;
 115                         ub.componentBindings[i] = DataTypes.getBinding(errorClasses[i]);
 116                 }
 117
 118                 return ub;
 119         }
 120
 121         // Puts request arguments to record type
 122         public static Binding request(Class<?>...argumentClasses)
 123         {
 124                 return null;
 125         }
 126
 127         public static Binding response(Class<?> response)
 128         {
 129                 return DataTypes.getBinding(response);
 130         }
 131 */
 132 }
 133