Remove util.OptionalBoolean

This class is not used anywhere, remove it.

Change-Id: Ib14a80db37a5a1f51eb1ee608aaf117dbd3d5427
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

diff --git a/common/util/src/main/java/org/opendaylight/yangtools/util/OptionalBoolean.java b/common/util/src/main/java/org/opendaylight/yangtools/util/OptionalBoolean.java
deleted file mode 100644 (file)
index 84bb6a2..0000000
--- a/common/util/src/main/java/org/opendaylight/yangtools/util/OptionalBoolean.java
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (c) 2017 Pantheon Technologies, s.r.o. and others.  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
- */
-package org.opendaylight.yangtools.util;
-
-import com.google.common.annotations.Beta;
-import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
-import java.util.Optional;
-import org.eclipse.jdt.annotation.NonNull;
-import org.eclipse.jdt.annotation.Nullable;
-
-/**
- * Utility class for storing an optional boolean in a single byte value. This cuts down the memory requirement quite
- * at very small computational cost.
- *
- * <p>
- * Note: fields do not have to be explicitly initialized, as default initialization value for 'byte', 0, is used to
- *       represent 'absent' condition.
- *
- * @author Robert Varga
- */
-@Beta
-public final class OptionalBoolean {
-    private static final @NonNull Optional<Boolean> FALSE_OPTIONAL = Optional.of(Boolean.FALSE);
-    private static final @NonNull Optional<Boolean> TRUE_OPTIONAL = Optional.of(Boolean.TRUE);
-
-    private static final byte ABSENT = 0;
-    private static final byte FALSE = 1;
-    private static final byte TRUE = 2;
-
-    private OptionalBoolean() {
-        throw new UnsupportedOperationException();
-    }
-
-    /**
-     * Check if a field value has been set, just like {@link Optional#isPresent()}.
-     *
-     * @param value field value
-     * @return True if the value is set.
-     * @throws IllegalArgumentException if value is invalid
-     */
-    public static boolean isPresent(final byte value) {
-        switch (value) {
-            case ABSENT:
-                return false;
-            case FALSE:
-            case TRUE:
-                return true;
-            default:
-                throw invalidValue(value);
-        }
-    }
-
-    /**
-     * Decode boolean from a field value, just like {@link Optional#get()}.
-     *
-     * @param value Field value
-     * @return Decoded boolean.
-     * @throws IllegalArgumentException if value is invalid
-     * @throws IllegalStateException if value has not been set
-     */
-    public static boolean get(final byte value) {
-        switch (value) {
-            case ABSENT:
-                throw new IllegalStateException("Field has not been initialized");
-            case FALSE:
-                return false;
-            case TRUE:
-                return true;
-            default:
-                throw invalidValue(value);
-        }
-    }
-
-    /**
-     * Encode a boolean to a field value, just like {@link Optional#of(Object)}.
-     *
-     * @param bool Boolean value.
-     * @return Field value.
-     */
-    public static byte of(final boolean bool) {
-        return bool ? TRUE : FALSE;
-    }
-
-    /**
-     * Convert a nullable {@link Boolean} into a field value, just like {@link Optional#ofNullable(Object)}.
-     *
-     * @param bool Boolean value.
-     * @return Field value.
-     */
-    public static byte ofNullable(final @Nullable Boolean bool) {
-        return bool == null ? ABSENT : of(bool.booleanValue());
-    }
-
-    /**
-     * Convert a field value to a nullable {@link Boolean}. Similar to {@code Optional.orElse(null)}.
-     *
-     * @param value Field value.
-     * @return Nullable Boolean.
-     */
-    @SuppressFBWarnings("NP_BOOLEAN_RETURN_NULL")
-    public static @Nullable Boolean toNullable(final byte value) {
-        switch (value) {
-            case ABSENT:
-                return null;
-            case FALSE:
-                return Boolean.FALSE;
-            case TRUE:
-                return Boolean.TRUE;
-            default:
-                throw invalidValue(value);
-        }
-    }
-
-    /**
-     * Convert an {@link Optional} {@link Boolean} into a field value.
-     *
-     * @param value Optional {@link Boolean}.
-     * @return Field value.
-     * @throws NullPointerException if value is null.
-     */
-    public static byte ofOptional(final Optional<Boolean> value) {
-        return ofNullable(value.orElse(null));
-    }
-
-    /**
-     * Convert a field value into an {@link Optional} {@link Boolean}.
-     *
-     * @param value Field value.
-     * @return Optional {@link Boolean}.
-     * @throws IllegalArgumentException if value is invalid.
-     */
-    public static @NonNull Optional<Boolean> toOptional(final byte value) {
-        switch (value) {
-            case ABSENT:
-                return Optional.empty();
-            case FALSE:
-                return FALSE_OPTIONAL;
-            case TRUE:
-                return TRUE_OPTIONAL;
-            default:
-                throw invalidValue(value);
-        }
-    }
-
-    /**
-     * Convert a field value into a String representation.
-     *
-     * @param value Field value.
-     * @return Boolean-compatible string, or "absent".
-     * @throws IllegalArgumentException if value is invalid.
-     */
-    public static @NonNull String toString(final byte value) {
-        switch (value) {
-            case ABSENT:
-                return "absent";
-            case FALSE:
-                return Boolean.toString(false);
-            case TRUE:
-                return Boolean.toString(true);
-            default:
-                throw invalidValue(value);
-        }
-    }
-
-    private static IllegalArgumentException invalidValue(final byte value) {
-        throw new IllegalArgumentException("Invalid field value " + value);
-    }
-}