DoubleTransformer.java

package silentium.commons.configuration.transformers;

import silentium.commons.configuration.PropertyTransformer;
import silentium.commons.configuration.TransformationException;

import java.lang.reflect.Field;

/**
 * Transformes decimal that is represented as string to double
 *
 * @author SoulKeeper
 */
public class DoubleTransformer implements PropertyTransformer<Double> {
	/**
	 * Shared instance of this transformer. It's thread-safe so no need of multiple instances
	 */
	public static final DoubleTransformer SHARED_INSTANCE = new DoubleTransformer();

	/**
	 * Transforms string to required double
	 *
	 * @param value value that will be transformed
	 * @param field value will be assigned to this field
	 * @return Double that represents transformed string
	 * @throws TransformationException if something went wrong
	 */
	@Override
	public Double transform(final String value, final Field field) throws TransformationException {
		try {
			return Double.parseDouble(value);
		} catch (Exception e) {
			throw new TransformationException(e);
		}
	}
}