StringConverter.java

package org.mongodb.morphia.converters;


import org.mongodb.morphia.mapping.MappedField;
import org.mongodb.morphia.utils.ReflectionUtils;

import java.util.List;


/**
 * @author Uwe Schaefer, (us@thomas-daily.de)
 * @author scotthernandez
 */
public class StringConverter extends TypeConverter implements SimpleValueConverter {
    /**
     * Creates the Converter.
     */
    public StringConverter() {
        super(String.class, String[].class);
    }

    @Override
    public Object decode(final Class targetClass, final Object fromDBObject, final MappedField optionalExtraInfo) {
        if (fromDBObject == null) {
            return null;
        }

        if (targetClass.equals(fromDBObject.getClass())) {
            return fromDBObject;
        }

        if (fromDBObject instanceof List) {
            final Class<?> type = targetClass.isArray() ? targetClass.getComponentType() : targetClass;
            return ReflectionUtils.convertToArray(type, (List<?>) fromDBObject);
        }

        if (targetClass.equals(String[].class)) {
            return new String[]{fromDBObject.toString()};
        }

        return fromDBObject.toString();
    }
}