diff options
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/BidiFilter.java')
-rw-r--r-- | jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/BidiFilter.java | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/BidiFilter.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/BidiFilter.java deleted file mode 100644 index e7bdf8c663..0000000000 --- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/BidiFilter.java +++ /dev/null @@ -1,105 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2007, 2008 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; - -import org.eclipse.jpt.utility.Filter; - -/** - * Used by various "pluggable" classes to filter objects - * in both directions. - * - * If anyone can come up with a better class name - * and/or method name, I would love to hear it. ~bjv - */ -public interface BidiFilter<T> extends Filter<T> { - - /** - * Return whether the specified object is "accepted" by the - * "reverse" filter. What that means is determined by the client. - */ - boolean reverseAccept(T o); - - - final class Null<S> implements BidiFilter<S> { - @SuppressWarnings("unchecked") - public static final BidiFilter INSTANCE = new Null(); - @SuppressWarnings("unchecked") - public static <R> BidiFilter<R> instance() { - return INSTANCE; - } - // ensure single instance - private Null() { - super(); - } - // nothing is filtered - everything is accepted - public boolean accept(S o) { - return true; - } - // nothing is "reverse-filtered" - everything is accepted - public boolean reverseAccept(S o) { - return true; - } - @Override - public String toString() { - return "BidiFilter.Null"; //$NON-NLS-1$ - } - } - - final class Opaque<S> implements BidiFilter<S> { - @SuppressWarnings("unchecked") - public static final BidiFilter INSTANCE = new Opaque(); - @SuppressWarnings("unchecked") - public static <R> BidiFilter<R> instance() { - return INSTANCE; - } - // ensure single instance - private Opaque() { - super(); - } - // everything is filtered - nothing is accepted - public boolean accept(S o) { - return false; - } - // everything is "reverse-filtered" - nothing is accepted - public boolean reverseAccept(S o) { - return false; - } - @Override - public String toString() { - return "BidiFilter.Opaque"; //$NON-NLS-1$ - } - } - - final class Disabled<S> implements BidiFilter<S> { - @SuppressWarnings("unchecked") - public static final BidiFilter INSTANCE = new Disabled(); - @SuppressWarnings("unchecked") - public static <R> BidiFilter<R> instance() { - return INSTANCE; - } - // ensure single instance - private Disabled() { - super(); - } - // throw an exception - public boolean accept(S o) { - throw new UnsupportedOperationException(); - } - // throw an exception - public boolean reverseAccept(S o) { - throw new UnsupportedOperationException(); - } - @Override - public String toString() { - return "BidiFilter.Disabled"; //$NON-NLS-1$ - } - } - -} |