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1 /*
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2 * Copyright cast(C) 2005 db4objects Inc. http://www.db4o.com and others.
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3 *
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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8 *
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9 * Contributors:
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10 * db4objects - Initial API and implementation
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11 * Matt Carter - Character support completed (bug 197679)
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12 */
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13 module org.eclipse.core.internal.databinding.conversion.IdentityConverter;
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14
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15 import java.lang.all;
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85
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16 import java.nonstandard.RuntimeTraits;
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78
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17
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18 import org.eclipse.core.databinding.BindingException;
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19 import org.eclipse.core.databinding.conversion.IConverter;
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20
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21 /**
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22 * TheIdentityConverter. Returns the source value (the identity function).
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23 */
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24 public class IdentityConverter : IConverter {
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25
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85
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26 private TypeInfo fromType;
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27
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85
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28 private TypeInfo toType;
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29
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30 /**
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31 * @param type
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32 */
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85
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33 public this(TypeInfo type) {
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78
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34 this.fromType = type;
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35 this.toType = type;
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36 initPrimitiveMap();
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37 }
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38
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39 /**
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40 * @param fromType
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41 * @param toType
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42 */
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43 public this(TypeInfo fromType, TypeInfo toType) {
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44 this.fromType = fromType;
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45 this.toType = toType;
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46 initPrimitiveMap();
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47 }
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48
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49 private TypeInfo[][] primitiveMap;
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50
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51 private void initPrimitiveMap(){
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52 primitiveMap = [
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53 [ cast(TypeInfo)Integer.TYPE, typeid(Integer) ], [ cast(TypeInfo)Short.TYPE, typeid(Short) ],
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54 [ cast(TypeInfo)Long.TYPE, typeid(Long) ], [ cast(TypeInfo)Double.TYPE, typeid(Double) ],
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55 [ cast(TypeInfo)Byte.TYPE, typeid(Byte) ], [ cast(TypeInfo)Float.TYPE, typeid(Float) ],
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56 [ cast(TypeInfo)Boolean.TYPE, typeid(Boolean) ],
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57 [ cast(TypeInfo)Character.TYPE, typeid(Character) ] ];
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58 }
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78
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59
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60 /*
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61 * (non-Javadoc)
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62 *
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63 * @see org.eclipse.jface.binding.converter.IConverter#convert(java.lang.Object)
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64 */
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65 public Object convert(Object source) {
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85
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66 if ( isJavaPrimitive(toType)) {
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78
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67 if (source is null) {
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68 throw new BindingException("Cannot convert null to a primitive"); //$NON-NLS-1$
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69 }
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70 }
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71 if (source !is null) {
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72 TypeInfo sourceClass = getTypeInfo(source.classinfo);
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73 if (isJavaPrimitive(toType) || isJavaPrimitive(sourceClass)) {
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74 if (sourceClass.opEquals(toType)
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78
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75 || isPrimitiveTypeMatchedWithBoxed(sourceClass, toType)) {
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76 return source;
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77 }
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78 throw new BindingException(
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79 "Boxed and unboxed types do not match"); //$NON-NLS-1$
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80 }
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85
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81 if (!isImplicitly(sourceClass, toType)) {
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82 throw new BindingException(asClass(sourceClass).name
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83 ~ " is not assignable to " ~ asClass(toType).name); //$NON-NLS-1$
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78
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84 }
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85 }
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86 return source;
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87 }
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88
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89 /**
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90 * (Non-API) isPrimitiveTypeMatchedWithBoxed.
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91 *
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92 * @param sourceClass
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93 * @param toClass
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94 * @return true if sourceClass and toType are matched primitive/boxed types
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95 */
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96 public bool isPrimitiveTypeMatchedWithBoxed(TypeInfo sourceClass,
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97 TypeInfo toClass) {
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98 for (int i = 0; i < primitiveMap.length; i++) {
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85
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99 if (toClass.opEquals(primitiveMap[i][0])
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100 && sourceClass.opEquals(primitiveMap[i][1])) {
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101 return true;
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102 }
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103 if (sourceClass.opEquals(primitiveMap[i][0])
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104 && toClass.opEquals(primitiveMap[i][1])) {
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105 return true;
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106 }
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107 }
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108 return false;
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109 }
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110
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111 public Object getFromType() {
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112 return fromType;
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113 }
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114
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115 public Object getToType() {
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116 return toType;
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117 }
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118
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119 }
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