--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/conversion/IdentityConverter.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,112 @@
+/*
+ * Copyright cast(C) 2005 db4objects Inc.  http://www.db4o.com  and others.
+ * 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     db4objects - Initial API and implementation
+ *     Matt Carter - Character support completed (bug 197679)
+ */
+module org.eclipse.core.internal.databinding.conversion.IdentityConverter;
+
+import java.lang.all;
+
+import org.eclipse.core.databinding.BindingException;
+import org.eclipse.core.databinding.conversion.IConverter;
+
+/**
+ * TheIdentityConverter. Returns the source value (the identity function).
+ */
+public class IdentityConverter : IConverter {
+
+    private ClassInfo fromType;
+
+    private ClassInfo toType;
+
+    /**
+     * @param type
+     */
+    public this(ClassInfo type) {
+        this.fromType = type;
+        this.toType = type;
+    }
+
+    /**
+     * @param fromType
+     * @param toType
+     */
+    public this(ClassInfo fromType, ClassInfo toType) {
+        this.fromType = fromType;
+        this.toType = toType;
+    }
+
+    private ClassInfo[][] primitiveMap = new ClassInfo[][] [
+            [ Integer.TYPE, Integer.classinfo ], [ Short.TYPE, Short.classinfo ],
+            [ Long.TYPE, Long.classinfo ], [ Double.TYPE, Double.classinfo ],
+            [ Byte.TYPE, Byte.classinfo ], [ Float.TYPE, Float.classinfo ],
+            [ Boolean.TYPE, Boolean.classinfo ],
+            [ Character.TYPE, Character.classinfo ] ];
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.eclipse.jface.binding.converter.IConverter#convert(java.lang.Object)
+     */
+    public Object convert(Object source) {
+        if (toType.isPrimitive()) {
+            if (source is null) {
+                throw new BindingException("Cannot convert null to a primitive"); //$NON-NLS-1$
+            }
+        }
+        if (source !is null) {
+            ClassInfo sourceClass = source.getClass();
+            if (toType.isPrimitive() || sourceClass.isPrimitive()) {
+                if (sourceClass.equals(toType)
+                        || isPrimitiveTypeMatchedWithBoxed(sourceClass, toType)) {
+                    return source;
+                }
+                throw new BindingException(
+                        "Boxed and unboxed types do not match"); //$NON-NLS-1$
+            }
+            if (!toType.isAssignableFrom(sourceClass)) {
+                throw new BindingException(sourceClass.getName()
+                        + " is not assignable to " + toType.getName()); //$NON-NLS-1$
+            }
+        }
+        return source;
+    }
+
+    /**
+     * (Non-API) isPrimitiveTypeMatchedWithBoxed.
+     * 
+     * @param sourceClass
+     * @param toClass
+     * @return true if sourceClass and toType are matched primitive/boxed types
+     */
+    public bool isPrimitiveTypeMatchedWithBoxed(ClassInfo sourceClass,
+            ClassInfo toClass) {
+        for (int i = 0; i < primitiveMap.length; i++) {
+            if (toClass.equals(primitiveMap[i][0])
+                    && sourceClass.equals(primitiveMap[i][1])) {
+                return true;
+            }
+            if (sourceClass.equals(primitiveMap[i][0])
+                    && toClass.equals(primitiveMap[i][1])) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public Object getFromType() {
+        return fromType;
+    }
+
+    public Object getToType() {
+        return toType;
+    }
+
+}