diff options
Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/BooleanReference.java')
-rw-r--r-- | common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/BooleanReference.java | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/BooleanReference.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/BooleanReference.java deleted file mode 100644 index 0a73528e4e..0000000000 --- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/BooleanReference.java +++ /dev/null @@ -1,166 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2010, 2012 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.common.utility; - -import java.io.Serializable; - -/** - * Interface for a container for holding a <code>boolean</code> that cannot be - * changed by clients. - * <p> - * Provisional API: This interface is part of an interim API that is still - * under development and expected to change significantly before reaching - * stability. It is available at this early stage to solicit feedback from - * pioneering adopters on the understanding that any code that uses this API - * will almost certainly be broken (repeatedly) as the API evolves. - */ -public interface BooleanReference { - - /** - * Return the current <code>boolean</code> value. - */ - boolean getValue(); - - /** - * Return whether the current <code>boolean</code> value is equal to the - * specified value. - */ - boolean is(boolean value); - - /** - * Return whether the current <code>boolean</code> value is not equal to - * the specified value. - */ - boolean isNot(boolean value); - - /** - * Return whether the current <code>boolean</code> value is - * <code>true</code>. - */ - boolean isTrue(); - - /** - * Return whether the current <code>boolean</code> value is - * <code>false</code>. - */ - boolean isFalse(); - - - /** - * Convenience method. - */ - final class Value { - public static BooleanReference of(boolean value) { - return value ? True.instance() : False.instance(); - } - } - - - /** - * Singleton implementation of the read-only boolean reference interface - * whose value is always <code>true</code>. - */ - final class True - implements BooleanReference, Serializable - { - public static final BooleanReference INSTANCE = new True(); - - public static BooleanReference instance() { - return INSTANCE; - } - - // ensure single instance - private True() { - super(); - } - - public boolean getValue() { - return true; - } - - public boolean is(boolean value) { - return value; - } - - public boolean isNot(boolean value) { - return ! value; - } - - public boolean isTrue() { - return true; - } - - public boolean isFalse() { - return false; - } - - @Override - public String toString() { - return "[true]"; //$NON-NLS-1$ - } - - private static final long serialVersionUID = 1L; - private Object readResolve() { - // replace this object with the singleton - return INSTANCE; - } - } - - - /** - * Singleton implementation of the read-only boolean reference interface - * whose value is always <code>false</code>. - */ - final class False - implements BooleanReference, Serializable - { - public static final BooleanReference INSTANCE = new False(); - - public static BooleanReference instance() { - return INSTANCE; - } - - // ensure single instance - private False() { - super(); - } - - public boolean getValue() { - return false; - } - - public boolean is(boolean value) { - return ! value; - } - - public boolean isNot(boolean value) { - return value; - } - - public boolean isTrue() { - return false; - } - - public boolean isFalse() { - return false; - } - - @Override - public String toString() { - return "[false]"; //$NON-NLS-1$ - } - - private static final long serialVersionUID = 1L; - private Object readResolve() { - // replace this object with the singleton - return INSTANCE; - } - } -} |