diff options
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Transformer.java')
-rw-r--r-- | jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Transformer.java | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Transformer.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Transformer.java deleted file mode 100644 index 75e4cc0839..0000000000 --- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/Transformer.java +++ /dev/null @@ -1,69 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2005, 2007 Oracle. 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: - * Oracle - initial API and implementation - ******************************************************************************/ -package org.eclipse.jpt.utility.internal; - -/** - * Used by various "pluggable" classes to transform objects. - * Transform an object of type T1 to an object of type T2. - */ -public interface Transformer<T1, T2> { - - /** - * Return the transformed object. - * The semantics of "transform" is determined by the - * contract between the client and the server. - */ - T2 transform(T1 o); - - - final class Null<S1, S2> implements Transformer<S1, S2> { - @SuppressWarnings("unchecked") - public static final Transformer INSTANCE = new Null(); - @SuppressWarnings("unchecked") - public static <R1, R2> Transformer<R1, R2> instance() { - return INSTANCE; - } - // ensure single instance - private Null() { - super(); - } - // simply return the object, unchanged - @SuppressWarnings("unchecked") - public S2 transform(S1 o) { - return (S2) o; - } - @Override - public String toString() { - return "Transformer.Null"; - } - } - - final class Disabled<S1, S2> implements Transformer<S1, S2> { - @SuppressWarnings("unchecked") - public static final Transformer INSTANCE = new Disabled(); - @SuppressWarnings("unchecked") - public static <R1, R2> Transformer<R1, R2> instance() { - return INSTANCE; - } - // ensure single instance - private Disabled() { - super(); - } - // throw an exception - public S2 transform(S1 o) { - throw new UnsupportedOperationException(); - } - @Override - public String toString() { - return "Transformer.Disabled"; - } - } - -} |