/*
 * Copyright 2019, TeamDev. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.server.entity.storage;

import java.util.function.Function;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * A persistence strategy of an entity {@linkplain Column column}.
 *
 * <p>The {@link #apply(Object)} method generally does not accept {@code null}s and must not return
 * {@code null}, the only exception is {@link PersistenceStrategyOfNull}.
 */
public interface PersistenceStrategy<T, R> extends Function<T, R> {

    /**
     * A convenience shortcut.
     */
    @SuppressWarnings("unchecked") // The object is implied to be of type`T`.
    default R applyTo(Object object) {
        checkNotNull(object);
        T value = (T) object;
        return apply(value);
    }

    static <T> PersistenceStrategy<T, T> identity() {
        return new Identity<>();
    }

    final class Identity<T> implements PersistenceStrategy<T, T> {

        @Override
        public T apply(T t) {
            return t;
        }
    }
}

@@ -1508,16 +1508,199 @@
 shortcut
+ for %7B@link #apply(T)%7D.%0A     *%0A     * %3Cp%3ECan be used when the object is known of being of type %7B@code T%7D but can't be cast to it%0A     * explicitly (e.g. in case of wildcard arguments)
 .%0A     *
@@ -1743,46 +1743,15 @@
  // 
-The object is implied to be of type%60T%60
+See doc
 .%0A  
@@ -1956,180 +1956,15 @@
 urn 
-new Identity%3C%3E();%0A    %7D%0A%0A    final class Identity%3CT%3E implements PersistenceStrategy%3CT, T%3E %7B%0A%0A        @Override%0A        public T apply(T t) %7B%0A            return t;%0A        %7D
+t -%3E t;
 %0A   

Remove redundant inner class in `PersistenceStrategy`