Java tutorial
/** * Copyright 2013-2015 Pierre Merienne * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package stormy.pythian.model.instance; import static stormy.pythian.model.instance.FeatureType.DATE; import java.util.Date; import org.joda.time.DateTime; import org.joda.time.format.ISODateTimeFormat; @SuppressWarnings("serial") public class DateFeature extends Feature<Date> { public DateFeature(Date value) { super(DATE, value); } @Override public DecimalFeature toDecimal() { throw new UnsupportedOperationException("Date feature can't be converted to date feature"); } @Override public IntegerFeature toInteger() { return new IntegerFeature(value == null ? null : value.getTime()); } @Override public BooleanFeature toBoolean() { throw new UnsupportedOperationException("Date feature can't be converted to boolean feature"); } @Override public CategoricalFeature toCategorical() { throw new UnsupportedOperationException("Date feature can't be converted to categorical feature"); } @Override public TextFeature toText() { if (value == null) { return new TextFeature(null); } return new TextFeature(ISODateTimeFormat.dateTimeParser().withOffsetParsed().print(new DateTime(value))); } @Override public DateFeature toDate() { return new DateFeature(value); } }