org.netxilia.api.value.DateValue.java Source code

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Here is the source code for org.netxilia.api.value.DateValue.java

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/*******************************************************************************
 * 
 * Copyright 2010 Alexandru Craciun, and individual contributors as indicated
 * by the @authors tag. 
 * 
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 * 
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 ******************************************************************************/
package org.netxilia.api.value;

import java.io.Serializable;

import org.joda.time.DateTime;
import org.joda.time.DateTimeConstants;
import org.joda.time.Duration;
import org.joda.time.LocalDate;
import org.joda.time.LocalTime;
import org.joda.time.ReadablePartial;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

public class DateValue implements IGenericValue, Serializable {

    private static final long serialVersionUID = 3836743905167601667L;

    public static final DateTime ORIGIN = new DateTime(1900, 1, 1, 0, 0, 0, 0);

    private static final String DATE_PATTERN = "dd/MM/yyyy";
    private static final String TIME_PATTERN = "HH:mm:ss";
    private static final String DATETIME_PATTERN = "dd/MM/yyyy HH:mm:ss";

    // TODO should take it from the locale
    public static final DateTimeFormatter DEFAULT_DATE_FORMATTER = DateTimeFormat.forPattern(DATE_PATTERN);
    public static final DateTimeFormatter DEFAULT_DATETIME_FORMATTER = DateTimeFormat.forPattern(DATETIME_PATTERN);
    public static final DateTimeFormatter DEFAULT_TIME_FORMATTER = DateTimeFormat.forPattern(TIME_PATTERN);

    private final ReadablePartial value;

    public DateValue(ReadablePartial value) {
        this.value = value;
    }

    public DateValue(String rawString) {
        if (rawString.length() == DATE_PATTERN.length()) {
            this.value = DEFAULT_DATE_FORMATTER.parseDateTime(rawString).toLocalDate();
        } else if (rawString.length() == TIME_PATTERN.length()) {
            this.value = DEFAULT_TIME_FORMATTER.parseDateTime(rawString).toLocalTime();
        } else {
            this.value = DEFAULT_DATETIME_FORMATTER.parseDateTime(rawString).toLocalDateTime();
        }

    }

    @Override
    public Boolean getBooleanValue() {
        return value != null ? Boolean.TRUE : Boolean.FALSE;
    }

    @Override
    public ReadablePartial getDateValue() {
        return value;
    }

    @Override
    public Double getNumberValue() {
        return value != null
                ? (double) new Duration(ORIGIN, value.toDateTime(ORIGIN)).getMillis()
                        / DateTimeConstants.MILLIS_PER_DAY
                : Double.valueOf(0);
    }

    @Override
    public String getStringValue() {
        if (value == null) {
            return "";
        }
        if (value instanceof LocalDate) {
            return DEFAULT_DATE_FORMATTER.print(value);
        }
        if (value instanceof LocalTime) {
            return DEFAULT_TIME_FORMATTER.print(value);
        }
        return DEFAULT_DATETIME_FORMATTER.print(value);
    }

    @Override
    public GenericValueType getValueType() {
        return GenericValueType.DATE;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((value == null) ? 0 : value.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        DateValue other = (DateValue) obj;
        if (value == null) {
            if (other.value != null) {
                return false;
            }
        } else if (!value.equals(other.value)) {
            return false;
        }
        return true;
    }

    @Override
    public int compareTo(IGenericValue value) {
        if (value == null) {
            return 1;
        }
        ReadablePartial other = value.getDateValue();
        if (other == null) {
            if (this.value == null) {
                return 0;
            }
            return 1;
        }
        return this.value.toDateTime(ORIGIN).compareTo(other.toDateTime(ORIGIN));
    }

}