ph.com.nightowlstudios.utils.Utils Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of edge Show documentation
Show all versions of edge Show documentation
A simple library for building REST API using Vertx.
package ph.com.nightowlstudios.utils;
import io.vavr.control.Try;
import io.vertx.core.json.Json;
import io.vertx.core.json.JsonObject;
import org.apache.commons.lang3.StringUtils;
import ph.com.nightowlstudios.entity.Entity;
import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import java.util.function.Supplier;
import java.util.stream.Collectors;
/**
* @author Joseph Harvey Angeles - @yev
* @since 9/12/20
*/
public final class Utils {
private static final String UNDERSCORE = "_";
private Utils() {
}
public static Optional getFirstElement(List list) {
return list.isEmpty()
? Optional.empty()
: Optional.ofNullable(list.get(0));
}
/**
* Merges the field values of to
onto from
, replacing from
's value
* with to
's non-null
value. If to
's value for a certain field
* is null
, resulting return object will take from
's value for that field.
*
* This does not mutate the original objects.
*
* @param from object to replace values with
* @param to object whose values will be used to replace from
's
* @param Entity.class
object should conform to Table.class
and
* Column.class
* @return the resulting Entity
object.
* @see ph.com.nightowlstudios.entity.Entity
* @see ph.com.nightowlstudios.entity.Table
* @see ph.com.nightowlstudios.entity.Column
*/
public static T merge(T from, T to) {
T result = Json.decodeValue(new JsonObject().encode(), (Class) from.getClass());
for (Field field : result.getClass().getDeclaredFields()) {
final String prefix = field.getType().equals(boolean.class) ? "is" : "get";
Supplier> toValue = () -> Try.of(() -> to.getClass()
.getDeclaredMethod(prefix + StringUtils.capitalize(field.getName()))
.invoke(to))
.getOrNull();
Supplier> fromValue = () -> Try.of(() -> from.getClass()
.getDeclaredMethod(prefix + StringUtils.capitalize(field.getName()))
.invoke(from))
.getOrNull();
if (toValue.get() == null) {
Try.of(() -> result.getClass()
.getDeclaredMethod("set" + StringUtils.capitalize(field.getName()), field.getType())
.invoke(result, fromValue.get()));
} else {
Try.of(() -> result.getClass()
.getDeclaredMethod("set" + StringUtils.capitalize(field.getName()), field.getType())
.invoke(result, toValue.get()));
}
}
return result;
}
public static JsonObject camelCaseKeys(JsonObject json) {
json.stream()
.parallel()
.filter(e -> e.getKey().contains("_"))
.forEach(e -> {
json.put(Utils.toCamelCase(e.getKey()), e.getValue());
json.remove(e.getKey());
});
return json;
}
public static String toCamelCase(String word) {
return toCamelCase(word, UNDERSCORE);
}
public static String toCamelCase(String word, String separator) {
if (StringUtils.isBlank(word)) {
return StringUtils.EMPTY;
}
String[] tokens = word.split(separator);
if (tokens.length == 1) {
return tokens[0].trim().toLowerCase();
}
String head = tokens[0];
String[] tail = Arrays.copyOfRange(tokens, 1, tokens.length);
return head.toLowerCase() + Arrays
.stream(tail)
.sequential()
.map(StringUtils::capitalize)
.collect(Collectors.joining());
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy