fm.last.musicbrainz.data.model.PartialDate.java Source code

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Here is the source code for fm.last.musicbrainz.data.model.PartialDate.java

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/*
 * Copyright 2013 The musicbrainz-data Authors
 * 
 *  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 fm.last.musicbrainz.data.model;

import java.util.Comparator;

import javax.persistence.Access;
import javax.persistence.AccessType;
import javax.persistence.Embeddable;

import org.joda.time.LocalDate;

import com.google.common.base.Objects;
import com.google.common.collect.ComparisonChain;
import com.google.common.collect.Ordering;

@Embeddable
@Access(AccessType.PROPERTY)
public class PartialDate implements Comparable<PartialDate> {

    private static final String DATE_FIELD_SEPARATOR = "-";

    private Short year;
    private Short month;
    private Short day;

    public PartialDate() {
    }

    /** ONLY FOR TESTING **/
    PartialDate(Short year, Short month, Short day) {
        this.year = year;
        this.month = month;
        this.day = day;
    }

    public Short getYear() {
        return year;
    }

    public Short getMonth() {
        return month;
    }

    public Short getDay() {
        return day;
    }

    public void setYear(Short year) {
        this.year = year;
    }

    public void setMonth(Short month) {
        this.month = month;
    }

    public void setDay(Short day) {
        this.day = day;
    }

    public LocalDate toLocalDate() {
        if (year == null) {
            return null;
        }
        return LocalDate.parse(toString());
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof PartialDate) {
            PartialDate other = (PartialDate) obj;
            return Objects.equal(year, other.getYear()) && Objects.equal(month, other.getMonth())
                    && Objects.equal(day, other.getDay());
        }
        return false;
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(year, month, day);
    }

    @Override
    public String toString() {
        if (year == null) {
            return "";
        }
        StringBuilder sb = new StringBuilder(year);
        sb.append(String.format("%04d", year));
        if (month != null) {
            sb.append(DATE_FIELD_SEPARATOR).append(String.format("%02d", month));
            if (day != null) {
                sb.append(DATE_FIELD_SEPARATOR).append(String.format("%02d", day));
            }
        }
        return sb.toString();
    }

    @Override
    public int compareTo(PartialDate other) {
        Comparator<Short> comparator = Ordering.natural().nullsFirst();
        return ComparisonChain.start().compare(year, other.getYear(), comparator)
                .compare(month, other.getMonth(), comparator).compare(day, other.getDay(), comparator).result();
    }

}