Mercurial > projects > dwt2
view org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/conversion/IdentityConverter.d @ 78:0a55d2d5a946
Added file for databinding
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 14 Apr 2009 11:35:29 +0200 |
parents | |
children | 6be48cf9f95c |
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/* * 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; } }