further rework of code generator (still to weird)

refs 857

org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/extension/base/TransformationProviderBase.java

+/*--------------------------------------------------------------------------+
+$Id$
+|                                                                          |
+| Copyright 2012 ForTISS GmbH                     |
+|                                                                          |
+| Licensed under the Apache License, Version 2.0 (the "License");          |
+| you may not use this file except in compliance with the License.         |
+| You may obtain a copy of the License at                                  |
+|                                                                          |
+|    http://www.apache.org/licenses/LICENSE-2.0                            |
+|                                                                          |
+| Unless required by applicable law or agreed to in writing, software      |
+| distributed under the License is distributed on an "AS IS" BASIS,        |
+| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
+| See the License for the specific language governing permissions and      |
+| limitations under the License.                                           |
++--------------------------------------------------------------------------*/
+package org.fortiss.tooling.kernel.extension.base;
+
+import org.fortiss.tooling.kernel.extension.ITransformationProvider;
+import org.fortiss.tooling.kernel.extension.data.ITransformationContext;
+import org.fortiss.tooling.kernel.extension.exception.TransformationFailedException;
+
+/**
+ * Base class for {@link ITransformationProvider}s.
+ * 
+ * @param <S>
+ *            the source object class
+ * @param <T>
+ *            the target class
+ * @author hoelzl
+ * @author $Author$
+ * @version $Rev$
+ * @ConQAT.Rating YELLOW Hash: E70B50712E9BA8739D02E8FE703FC5C0
+ */
+public abstract class TransformationProviderBase<S extends Object, T extends Object> implements
+		ITransformationProvider {
+
+	/** Returns the source class this provider can handle. */
+	protected abstract Class<S> getSourceClass();
+
+	/** {@inheritDoc} */
+	@Override
+	public abstract Class<T> getTargetClass();
+
+	/** {@inheritDoc} */
+	@Override
+	public abstract T transform(Object source, ITransformationContext context)
+			throws TransformationFailedException;
+
+	/** {@inheritDoc} */
+	@Override
+	public boolean
+			canHandleChainTransformation(Class<?> sourceClass, ITransformationContext context) {
+		return getSourceClass().isAssignableFrom(sourceClass);
+	}
+
+	/** {@inheritDoc} */
+	@Override
+	public boolean canTransform(Object source, ITransformationContext context) {
+		return getSourceClass().isInstance(source);
+	}
+}