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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.java105
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"; //$NON-NLS-1$
- }
- }
-
-}

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