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String List converter for requery.
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| import android.support.annotation.Nullable; | |
| import java.util.Arrays; | |
| import java.util.Collections; | |
| import java.util.List; | |
| import io.requery.Converter; | |
| /** | |
| * @author Jakub Szymion | |
| * @since 01.06.2016 | |
| */ | |
| public class StringListConverter implements Converter<List<String>, String> { | |
| private static final String SEPARATOR = "\0007"; | |
| @Override | |
| public Class<List<String>> mappedType() { | |
| //noinspection unchecked | |
| return (Class) List.class; | |
| } | |
| @Override | |
| public Class<String> persistedType() { | |
| return String.class; | |
| } | |
| @Nullable | |
| @Override | |
| public Integer persistedSize() { | |
| return null; | |
| } | |
| @Override | |
| public String convertToPersisted(List<String> list) { | |
| if (list == null) { | |
| return ""; | |
| } | |
| StringBuilder sb = new StringBuilder(); | |
| int size = list.size(); | |
| int index = 0; | |
| for (String s : list) { | |
| ++index; | |
| sb.append(s); | |
| if (index < size) { | |
| sb.append(SEPARATOR); | |
| } | |
| } | |
| return sb.toString(); | |
| } | |
| @Override | |
| public List<String> convertToMapped(Class<? extends List<String>> type, String value) { | |
| if (value == null) { | |
| return Collections.emptyList(); | |
| } | |
| return Arrays.asList(value.split(SEPARATOR)); | |
| } | |
| } |
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