/*
 * Copyright 2021, TeamDev. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.base.Converter;

import static java.util.Objects.requireNonNull;

/**
 * Abstract base for stringifiers that employ a converter for its operations.
 *
 * @param <T> the type to stringify
 */
abstract class StringifierWithConverter<T> extends SerializableStringifier<T> {

    private static final long serialVersionUID = 0L;

    /**
     * Creates a new instance with the passed identity.
     *
     * @param identity
     *         the identity of the stringifier, which is used in {@link #toString()}.
     */
    protected StringifierWithConverter(String identity) {
        super(identity);
    }

    protected abstract Converter<String, T> converter();

    @Override
    protected String toString(T obj) {
        String result = converter().reverse().convert(obj);
        return requireNonNull(result);
    }

    @Override
    protected T fromString(String s) {
        T result = converter().convert(s);
        return requireNonNull(result);
    }
}

/*
 * Copyright 2021, TeamDev. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.base.Converter;

import static java.util.Objects.requireNonNull;

/**
 * Abstract base for stringifiers that employ a converter for their operations.
 *
 * @param <T> the type to stringify
 */
abstract class StringifierWithConverter<T> extends SerializableStringifier<T> {

    private static final long serialVersionUID = 0L;

    /**
     * Creates a new instance with the passed identity.
     *
     * @param identity
     *         the identity of the stringifier, which is used in {@link #toString()}.
     */
    protected StringifierWithConverter(String identity) {
        super(identity);
    }

    protected abstract Converter<String, T> converter();

    @Override
    protected String toString(T obj) {
        String result = converter().reverse().convert(obj);
        return requireNonNull(result);
    }

    @Override
    protected T fromString(String s) {
        T result = converter().convert(s);
        return requireNonNull(result);
    }
}

Fix Javadoc language