TranslationService.java

package com.hazelcast.samples.spring.data.migration;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;

/**
 * A translation service that won't win prizes, or not the kind
 * of prizes you'd want.
 *
 * Only English to Spanish is implemented.
 */
@Service
public class TranslationService {
    private static final String UNKNOWN = "?";

    @Autowired
    private NounJPARepository nounJPARepository;

    @Autowired
    private VerbJPARepository verbJPARepository;

    /**
     * Simplistic translation, not catering for plurals, tenses, accents, grammar, etc.
     *
     * For the input string, look for matching words in the database and replace them.
     *
     * @param input One or more English words, separated by spaces
     * @return Spanish words
     */
    public String englishToSpanish(String input) {
        if (input == null) {
            return "";
        }

        // make an array of words, lower case letters only
        String[] words = input.toLowerCase().replaceAll("[^a-z ]", "").trim().split(" ");

        for (int i = 0; i < words.length; i++) {
            Noun noun = this.nounJPARepository.findByEnglish(words[i]);
            if (noun != null) {
                words[i] = noun.getSpanish();
            } else {
                Verb verb = this.verbJPARepository.findByEnglish(words[i]);
                if (verb != null) {
                    words[i] = verb.getSpanish();
                } else {
                    words[i] = UNKNOWN;
                }
            }
        }

        return Arrays.asList(words).toString().replaceAll("\\[", "").replaceAll("\\]", "").replaceAll(",", "");
    }
}