com.nhl.link.rest.parser.converter.Normalizer Maven / Gradle / Ivy

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package com.nhl.link.rest.parser.converter;

import java.util.HashMap;
import java.util.Map;

/**
 * A utility class that ensures that client-provided numeric values are
 * converted to the right numeric type. This is especially important for ID
 * values that are used in comparisons.
 *
 * @since 1.12
 */
public class Normalizer {

    interface TypeNormalizer {
		Object normalize(Object value);
	}

	@SuppressWarnings("serial")
	private static final Map, TypeNormalizer> NORMALIZERS = new HashMap, TypeNormalizer>() {
		{
			put(Long.class, value -> {

                if (!(value instanceof Number)) {
                    return value;
                }

                if (value instanceof Long) {
                    return value;
                }

                return ((Number) value).longValue();
            });
		}
	};

	/**
	 * @since 1.24
	 */
	public static Object normalize(Object value, Class numericType) {
		TypeNormalizer normalizer = NORMALIZERS.get(numericType);
		return normalizer == null ? value : normalizer.normalize(value);
	}
}