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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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16
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17 import org.eclipse.core.databinding.BindingException;
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18 import org.eclipse.core.databinding.conversion.IConverter;
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19
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20 /**
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21 * TheIdentityConverter. Returns the source value (the identity function).
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22 */
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23 public class IdentityConverter : IConverter {
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24
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25 private ClassInfo fromType;
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26
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27 private ClassInfo toType;
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28
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29 /**
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30 * @param type
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31 */
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32 public this(ClassInfo type) {
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33 this.fromType = type;
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34 this.toType = type;
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35 }
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36
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37 /**
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38 * @param fromType
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39 * @param toType
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40 */
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41 public this(ClassInfo fromType, ClassInfo toType) {
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42 this.fromType = fromType;
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43 this.toType = toType;
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44 }
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45
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46 private ClassInfo[][] primitiveMap = new ClassInfo[][] [
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47 [ Integer.TYPE, Integer.classinfo ], [ Short.TYPE, Short.classinfo ],
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48 [ Long.TYPE, Long.classinfo ], [ Double.TYPE, Double.classinfo ],
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49 [ Byte.TYPE, Byte.classinfo ], [ Float.TYPE, Float.classinfo ],
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50 [ Boolean.TYPE, Boolean.classinfo ],
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51 [ Character.TYPE, Character.classinfo ] ];
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52
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53 /*
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54 * (non-Javadoc)
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55 *
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56 * @see org.eclipse.jface.binding.converter.IConverter#convert(java.lang.Object)
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57 */
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58 public Object convert(Object source) {
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59 if (toType.isPrimitive()) {
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60 if (source is null) {
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61 throw new BindingException("Cannot convert null to a primitive"); //$NON-NLS-1$
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62 }
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63 }
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64 if (source !is null) {
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65 ClassInfo sourceClass = source.getClass();
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66 if (toType.isPrimitive() || sourceClass.isPrimitive()) {
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67 if (sourceClass.equals(toType)
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68 || isPrimitiveTypeMatchedWithBoxed(sourceClass, toType)) {
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69 return source;
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70 }
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71 throw new BindingException(
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72 "Boxed and unboxed types do not match"); //$NON-NLS-1$
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73 }
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74 if (!toType.isAssignableFrom(sourceClass)) {
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75 throw new BindingException(sourceClass.getName()
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76 + " is not assignable to " + toType.getName()); //$NON-NLS-1$
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77 }
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78 }
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79 return source;
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80 }
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81
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82 /**
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83 * (Non-API) isPrimitiveTypeMatchedWithBoxed.
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84 *
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85 * @param sourceClass
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86 * @param toClass
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87 * @return true if sourceClass and toType are matched primitive/boxed types
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88 */
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89 public bool isPrimitiveTypeMatchedWithBoxed(ClassInfo sourceClass,
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90 ClassInfo toClass) {
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91 for (int i = 0; i < primitiveMap.length; i++) {
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92 if (toClass.equals(primitiveMap[i][0])
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93 && sourceClass.equals(primitiveMap[i][1])) {
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94 return true;
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95 }
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96 if (sourceClass.equals(primitiveMap[i][0])
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97 && toClass.equals(primitiveMap[i][1])) {
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98 return true;
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99 }
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100 }
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101 return false;
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102 }
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103
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104 public Object getFromType() {
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105 return fromType;
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106 }
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107
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108 public Object getToType() {
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109 return toType;
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110 }
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111
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112 }
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