LoganSquareConverter.java

package retrofit.converter;

import com.bluelinelabs.logansquare.LoganSquare;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;

import retrofit.converter.ConversionException;
import retrofit.converter.Converter;
import retrofit.mime.TypedInput;
import retrofit.mime.TypedOutput;
import retrofit.mime.TypedString;

/**
 * A {@link Converter} which uses parsing and serialization provided by bluelinelabs' LoganSquare library.
 * @author aurae
 */
public class LoganSquareConverter implements Converter {

	@Override public Object fromBody(TypedInput body, Type type) throws ConversionException {
		try {
			// Check if the type contains a parametrized list
			if (ParameterizedType.class.isAssignableFrom(type.getClass())) {
				// Grab the actual type parameter from the parametrized list and delegate to LoganSquare
				ParameterizedType parameterized = (ParameterizedType) type;
				return LoganSquare.parseList(body.in(), (Class) parameterized.getActualTypeArguments()[0]);

			} else {
				// Single elements get parsed immediately
				return LoganSquare.parse(body.in(), (Class) type);
			}
		} catch (Exception e) {
			throw new ConversionException(e);
		}
	}

	@SuppressWarnings("unchecked") @Override public TypedOutput toBody(Object object) {
		try {
			// Check if the type contains a parametrized list
			if (List.class.isAssignableFrom(object.getClass())) {
				// Convert the input to a list first, access the first element and serialize the list
				List<Object> list = (List<Object>) object;
				Object firstElement = list.get(0);
				return new TypedString(LoganSquare.serialize(list, (Class<Object>) firstElement.getClass()));

			} else {
				// Serialize single elements immediately
				return new TypedString(LoganSquare.serialize(object));
			}
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}
}