cc.protea.foundation.providers.DateParamConverterProvider Maven / Gradle / Ivy

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Integrate compatible versions of many external systems to create a REST/HTTP server foundation

There is a newer version: 0.5.12

package cc.protea.foundation.providers;

import org.apache.commons.lang3.StringUtils;

import javax.ws.rs.ext.ParamConverter;
import javax.ws.rs.ext.ParamConverterProvider;
import javax.ws.rs.ext.Provider;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.text.SimpleDateFormat;
import java.util.Date;

@Provider
public class DateParamConverterProvider implements ParamConverterProvider {

	@SuppressWarnings({ "rawtypes", "unchecked" })
	@Override
	public ParamConverter getConverter(Class type, Type genericType, Annotation[] annotations) {
		if (type.equals(Date.class)) {
			return new DateParamConverter();
		}
		return null;
	}

	static Date dateToString(String in) {
		try {
			in = StringUtils.trimToEmpty(in);
			switch (in.length()) {
				case 8:
					return new Date(new SimpleDateFormat("yyyyMMdd").parse(in).getTime());
				case 10:
					return new Date(new SimpleDateFormat("yyyy-MM-dd").parse(in).getTime());
				case 19:
					if (in.contains("T")) {
						return new Date(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss").parse(in).getTime());
					} else {
						return new Date(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(in).getTime());
					}
				case 24:
					if (StringUtils.endsWith(in, "Z")) {
						in = StringUtils.substring(in, 0, 19) + "Z";
					}
					// fall through
				case 20:
					return new Date(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").parse(in).getTime());
			}
			if (StringUtils.isNumeric(in)) {
				return new Date(Long.parseLong(in));
			}
		} catch (Exception e) {
			throw new IllegalArgumentException("Could not convert to a date: '" + in + "'", e);
		}
		throw new IllegalArgumentException("Could not convert to a date: '" + in + "'");
	}

	private static class DateParamConverter implements ParamConverter {

		@Override
		public Date fromString(String in) {
			return dateToString(in);
		}

		@Override
		public String toString(Date value) {
			return value.toString();
		}

	}
}