Java tutorial
/* * Copyright 2010-2013 Ning, Inc. * * Ning licenses this file to you 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 com.ning.billing.catalog; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElement; import org.joda.time.DateTime; import org.joda.time.Period; import com.ning.billing.catalog.api.Duration; import com.ning.billing.catalog.api.TimeUnit; import com.ning.billing.util.config.catalog.ValidatingConfig; import com.ning.billing.util.config.catalog.ValidationError; import com.ning.billing.util.config.catalog.ValidationErrors; @XmlAccessorType(XmlAccessType.NONE) public class DefaultDuration extends ValidatingConfig<StandaloneCatalog> implements Duration { @XmlElement(required = true) private TimeUnit unit; @XmlElement(required = false) private Integer number = -1; /* (non-Javadoc) * @see com.ning.billing.catalog.IDuration#getUnit() */ @Override public TimeUnit getUnit() { return unit; } /* (non-Javadoc) * @see com.ning.billing.catalog.IDuration#getLength() */ @Override public int getNumber() { return number; } @Override public DateTime addToDateTime(final DateTime dateTime) { if ((number == null) && (unit != TimeUnit.UNLIMITED)) { return dateTime; } switch (unit) { case DAYS: return dateTime.plusDays(number); case MONTHS: return dateTime.plusMonths(number); case YEARS: return dateTime.plusYears(number); case UNLIMITED: return dateTime.plusYears(100); default: return dateTime; } } @Override public ValidationErrors validate(final StandaloneCatalog catalog, final ValidationErrors errors) { //Validation: TimeUnit UNLIMITED iff number == -1 if ((unit == TimeUnit.UNLIMITED && number != -1)) { errors.add(new ValidationError("Duration can only have 'UNLIMITED' unit if the number is omitted.", catalog.getCatalogURI(), DefaultPlanPhase.class, "")); } //TODO MDW - Validation TimeUnit UNLIMITED iff number == -1 return errors; } protected DefaultDuration setUnit(final TimeUnit unit) { this.unit = unit; return this; } protected DefaultDuration setNumber(final Integer number) { this.number = number; return this; } @Override public Period toJodaPeriod() { if ((number == null) && (unit != TimeUnit.UNLIMITED)) { return new Period(); } switch (unit) { case DAYS: return new Period().withDays(number); case MONTHS: return new Period().withMonths(number); case YEARS: return new Period().withYears(number); case UNLIMITED: return new Period().withYears(100); default: return new Period(); } } }