/*
 * Copyright 2020, 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.string;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import io.spine.annotation.Internal;

import java.util.stream.Collector;
import java.util.stream.Collectors;

/**
 * Utilities for debug and error diagnostics.
 */
@Internal
public final class Diags {

    @VisibleForTesting
    static final String COMMA_AND_SPACE = ", ";
    private static final Joiner JOINER = Joiner.on(COMMA_AND_SPACE);
    private static final char BACKTICK = '`';

    /** Prevents instantiation of this utility class. */
    private Diags() {
    }

    /**
     * Wraps the string representation of the passed object into backticks.
     */
    public static String backtick(Object object) {
        return BACKTICK + object.toString() + BACKTICK;
    }

    /**
     * Lists the passed items separating with a comma followed by a space character.
     */
    public static String join(Iterable<?> items) {
        return JOINER.join(items);
    }

    /**
     * Lists the passed elements separating with comma followed by a space character.
     */
    @SafeVarargs
    public static <E> String join(E... elements) {
        return JOINER.join(elements);
    }

    /**
     * Returns a {@code Collector} which enumerates items separating them a comma followed
     * by a space character.
     */
    public static Collector<CharSequence, ?, String> toEnumeration() {
        return Collectors.joining(COMMA_AND_SPACE);
    }

    /**
     * Returns a {@code Collector} which wraps items into backticks and joins them
     * into a string separating with a comma followed by a space character.
     */
    public static Collector<CharSequence, ?, String> toEnumerationBackticked() {
        return Collectors.mapping(Diags::backtick, toEnumeration());
    }
}

@@ -2376,36 +2376,30 @@
 c Collector%3C
-CharSequence
+Object
 , ?, String%3E
@@ -2423,32 +2423,69 @@
 %7B%0A        return
+ Collectors.mapping(Object::toString,
  Collectors.join
@@ -2500,24 +2500,25 @@
 A_AND_SPACE)
+)
 ;%0A    %7D%0A%0A   
@@ -2721,20 +2721,14 @@
 tor%3C
-CharSequence
+Object
 , ?,

Allow passing any object for collection