/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library 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 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -----------------------
* TimeTableXYDataset.java
* -----------------------
* (C) Copyright 2004-2009, by Andreas Schroeder and Contributors.
*
* Original Author: Andreas Schroeder;
* Contributor(s): David Gilbert (for Object Refinery Limited);
* Rob Eden;
*
* Changes
* -------
* 01-Apr-2004 : Version 1 (AS);
* 05-May-2004 : Now implements AbstractIntervalXYDataset (DG);
* 15-Jul-2004 : Switched getX() with getXValue() and getY() with
* getYValue() (DG);
* 15-Sep-2004 : Added getXPosition(), setXPosition(), equals() and
* clone() (DG);
* 17-Nov-2004 : Updated methods for changes in DomainInfo interface (DG);
* 25-Nov-2004 : Added getTimePeriod(int) method (DG);
* 11-Jan-2005 : Removed deprecated code in preparation for the 1.0.0
* release (DG);
* 27-Jan-2005 : Modified to use TimePeriod rather than RegularTimePeriod (DG);
* 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
* 25-Jul-2007 : Added clear() method by Rob Eden, see patch 1752205 (DG);
* 04-Jun-2008 : Updated Javadocs (DG);
* 26-May-2009 : Peg to time zone if RegularTimePeriod is used (DG);
* 02-Nov-2009 : Changed String to Comparable in add methods (DG);
*
*/
package org.jfree.data.time;
import java.util.Calendar;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;
import org.jfree.data.DefaultKeyedValues2D;
import org.jfree.data.DomainInfo;
import org.jfree.data.Range;
import org.jfree.data.general.DatasetChangeEvent;
import org.jfree.data.xy.AbstractIntervalXYDataset;
import org.jfree.data.xy.IntervalXYDataset;
import org.jfree.data.xy.TableXYDataset;
import org.jfree.util.PublicCloneable;
/**
* A dataset for regular time periods that implements the
* {@link TableXYDataset} interface. Note that the {@link TableXYDataset}
* interface requires all series to share the same set of x-values. When
* adding a new item <code>(x, y)</code> to one series, all other series
* automatically get a new item <code>(x, null)</code> unless a non-null item
* has already been specified.
*
* @see org.jfree.data.xy.TableXYDataset
*/
public class TimeTableXYDataset extends AbstractIntervalXYDataset
implements Cloneable, PublicCloneable, IntervalXYDataset, DomainInfo,
TableXYDataset {
/**
* The data structure to store the values. Each column represents
* a series (elsewhere in JFreeChart rows are typically used for series,
* but it doesn't matter that much since this data structure is private
* and symmetrical anyway), each row contains values for the same
* {@link RegularTimePeriod} (the rows are sorted into ascending order).
*/
private DefaultKeyedValues2D values;
/**
* A flag that indicates that the domain is 'points in time'. If this flag
* is true, only the x-value (and not the x-interval) is used to determine
* the range of values in the domain.
*/
private boolean domainIsPointsInTime;
/**
* The point within each time period that is used for the X value when this
* collection is used as an {@link org.jfree.data.xy.XYDataset}. This can
* be the start, middle or end of the time period.
*/
private TimePeriodAnchor xPosition;
/** A working calendar (to recycle) */
private Calendar workingCalendar;
/**
* Creates a new dataset.
*/
public TimeTableXYDataset() {
// defer argument checking
this(TimeZone.getDefault(), Locale.getDefault());
}
/**
* Creates a new dataset with the given time zone.
*
* @param zone the time zone to use (<code>null</code> not permitted).
*/
public TimeTableXYDataset(TimeZone zone) {
// defer argument checking
this(zone, Locale.getDefault());
}
/**
* Creates a new dataset with the given time zone and locale.
*
* @param zone the time zone to use (<code>null</code> not permitted).
* @param locale the locale to use (<code>null</code> not permitted).
*/
public TimeTableXYDataset(TimeZone zone, Locale locale) {
if (zone == null) {
throw new IllegalArgumentException("Null 'zone' argument.");
}
if (locale == null) {
throw new IllegalArgumentException("Null 'locale' argument.");
}
this.values = new DefaultKeyedValues2D(true);
this.workingCalendar = Calendar.getInstance(zone, locale);
this.xPosition = TimePeriodAnchor.START;
}
/**
* Returns a flag that controls whether the domain is treated as 'points in
* time'.
* <P>
* This flag is used when determining the max and min values for the domain.
* If true, then only the x-values are considered for the max and min
* values. If false, then the start and end x-values will also be taken
* into consideration.
*
* @return The flag.
*
* @see #setDomainIsPointsInTime(boolean)
*/
public boolean getDomainIsPointsInTime() {
return this.domainIsPointsInTime;
}
/**
* Sets a flag that controls whether the domain is treated as 'points in
* time', or time periods. A {@link DatasetChangeEvent} is sent to all
* registered listeners.
*
* @param flag the new value of the flag.
*
* @see #getDomainIsPointsInTime()
*/
public void setDomainIsPointsInTime(boolean flag) {
this.domainIsPointsInTime = flag;
notifyListeners(new DatasetChangeEvent(this, this));
}
/**
* Returns the position within each time period that is used for the X
* value.
*
* @return The anchor position (never <code>null</code>).
*
* @see #setXPosition(TimePeriodAnchor)
*/
public TimePeriodAnchor getXPosition() {
return this.xPosition;
}
/**
* Sets the position within each time period that is used for the X values,
* then sends a {@link DatasetChangeEvent} to all registered listeners.
*
* @param anchor the anchor position (<code>null</code> not permitted).
*
* @see #getXPosition()
*/
public void setXPosition(TimePeriodAnchor anchor) {
if (anchor == null) {
throw new IllegalArgumentException("Null 'anchor' argument.");
}
this.xPosition = anchor;
notifyListeners(new DatasetChangeEvent(this, this));
}
/**
* Adds a new data item to the dataset and sends a
* {@link DatasetChangeEvent} to all registered listeners.
*
* @param period the time period.
* @param y the value for this period.
* @param seriesName the name of the series to add the value.
*
* @see #remove(TimePeriod, Comparable)
*/
public void add(TimePeriod period, double y, Comparable seriesName) {
add(period, new Double(y), seriesName, true);
}
/**
* Adds a new data item to the dataset and, if requested, sends a
* {@link DatasetChangeEvent} to all registered listeners.
*
* @param period the time period (<code>null</code> not permitted).
* @param y the value for this period (<code>null</code> permitted).
* @param seriesName the name of the series to add the value
* (<code>null</code> not permitted).
* @param notify whether dataset listener are notified or not.
*
* @see #remove(TimePeriod, Comparable, boolean)
*/
public void add(TimePeriod period, Number y, Comparable seriesName,
boolean notify) {
// here's a quirk - the API has been defined in terms of a plain
// TimePeriod, which cannot make use of the timezone and locale
// specified in the constructor...so we only do the time zone
// pegging if the period is an instanceof RegularTimePeriod
if (period instanceof RegularTimePeriod) {
RegularTimePeriod p = (RegularTimePeriod) period;
p.peg(this.workingCalendar);
}
this.values.addValue(y, period, seriesName);
if (notify) {
fireDatasetChanged();
}
}
/**
* Removes an existing data item from the dataset.
*
* @param period the (existing!) time period of the value to remove
* (<code>null</code> not permitted).
* @param seriesName the (existing!) series name to remove the value
* (<code>null</code> not permitted).
*
* @see #add(TimePeriod, double, Comparable)
*/
public void remove(TimePeriod period, Comparable seriesName) {
remove(period, seriesName, true);
}
/**
* Removes an existing data item from the dataset and, if requested,
* sends a {@link DatasetChangeEvent} to all registered listeners.
*
* @param period the (existing!) time period of the value to remove
* (<code>null</code> not permitted).
* @param seriesName the (existing!) series name to remove the value
* (<code>null</code> not permitted).
* @param notify whether dataset listener are notified or not.
*
* @see #add(TimePeriod, double, Comparable)
*/
public void remove(TimePeriod period, Comparable seriesName,
boolean notify) {
this.values.removeValue(period, seriesName);
if (notify) {
fireDatasetChanged();
}
}
/**
* Removes all data items from the dataset and sends a
* {@link DatasetChangeEvent} to all registered listeners.
*
* @since 1.0.7
*/
public void clear() {
if (this.values.getRowCount() > 0) {
this.values.clear();
fireDatasetChanged();
}
}
/**
* Returns the time period for the specified item. Bear in mind that all
* series share the same set of time periods.
*
* @param item the item index (0 <= i <= {@link #getItemCount()}).
*
* @return The time period.
*/
public TimePeriod getTimePeriod(int item) {
return (TimePeriod) this.values.getRowKey(item);
}
/**
* Returns the number of items in ALL series.
*
* @return The item count.
*/
public int getItemCount() {
return this.values.getRowCount();
}
/**
* Returns the number of items in a series. This is the same value
* that is returned by {@link #getItemCount()} since all series
* share the same x-values (time periods).
*
* @param series the series (zero-based index, ignored).
*
* @return The number of items within the series.
*/
public int getItemCount(int series) {
return getItemCount();
}
/**
* Returns the number of series in the dataset.
*
* @return The series count.
*/
public int getSeriesCount() {
return this.values.getColumnCount();
}
/**
* Returns the key for a series.
*
* @param series the series (zero-based index).
*
* @return The key for the series.
*/
public Comparable getSeriesKey(int series) {
return this.values.getColumnKey(series);
}
/**
* Returns the x-value for an item within a series. The x-values may or
* may not be returned in ascending order, that is up to the class
* implementing the interface.
*
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return The x-value.
*/
public Number getX(int series, int item) {
return new Double(getXValue(series, item));
}
/**
* Returns the x-value (as a double primitive) for an item within a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*/
public double getXValue(int series, int item) {
TimePeriod period = (TimePeriod) this.values.getRowKey(item);
return getXValue(period);
}
/**
* Returns the starting X value for the specified series and item.
*
* @param series the series (zero-based index).
* @param item the item within a series (zero-based index).
*
* @return The starting X value for the specified series and item.
*
* @see #getStartXValue(int, int)
*/
public Number getStartX(int series, int item) {
return new Double(getStartXValue(series, item));
}
/**
* Returns the start x-value (as a double primitive) for an item within
* a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*/
public double getStartXValue(int series, int item) {
TimePeriod period = (TimePeriod) this.values.getRowKey(item);
return period.getStart().getTime();
}
/**
* Returns the ending X value for the specified series and item.
*
* @param series the series (zero-based index).
* @param item the item within a series (zero-based index).
*
* @return The ending X value for the specified series and item.
*
* @see #getEndXValue(int, int)
*/
public Number getEndX(int series, int item) {
return new Double(getEndXValue(series, item));
}
/**
* Returns the end x-value (as a double primitive) for an item within
* a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*/
public double getEndXValue(int series, int item) {
TimePeriod period = (TimePeriod) this.values.getRowKey(item);
return period.getEnd().getTime();
}
/**
* Returns the y-value for an item within a series.
*
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return The y-value (possibly <code>null</code>).
*/
public Number getY(int series, int item) {
return this.values.getValue(item, series);
}
/**
* Returns the starting Y value for the specified series and item.
*
* @param series the series (zero-based index).
* @param item the item within a series (zero-based index).
*
* @return The starting Y value for the specified series and item.
*/
public Number getStartY(int series, int item) {
return getY(series, item);
}
/**
* Returns the ending Y value for the specified series and item.
*
* @param series the series (zero-based index).
* @param item the item within a series (zero-based index).
*
* @return The ending Y value for the specified series and item.
*/
public Number getEndY(int series, int item) {
return getY(series, item);
}
/**
* Returns the x-value for a time period.
*
* @param period the time period.
*
* @return The x-value.
*/
private long getXValue(TimePeriod period) {
long result = 0L;
if (this.xPosition == TimePeriodAnchor.START) {
result = period.getStart().getTime();
}
else if (this.xPosition == TimePeriodAnchor.MIDDLE) {
long t0 = period.getStart().getTime();
long t1 = period.getEnd().getTime();
result = t0 + (t1 - t0) / 2L;
}
else if (this.xPosition == TimePeriodAnchor.END) {
result = period.getEnd().getTime();
}
return result;
}
/**
* Returns the minimum x-value in the dataset.
*
* @param includeInterval a flag that determines whether or not the
* x-interval is taken into account.
*
* @return The minimum value.
*/
public double getDomainLowerBound(boolean includeInterval) {
double result = Double.NaN;
Range r = getDomainBounds(includeInterval);
if (r != null) {
result = r.getLowerBound();
}
return result;
}
/**
* Returns the maximum x-value in the dataset.
*
* @param includeInterval a flag that determines whether or not the
* x-interval is taken into account.
*
* @return The maximum value.
*/
public double getDomainUpperBound(boolean includeInterval) {
double result = Double.NaN;
Range r = getDomainBounds(includeInterval);
if (r != null) {
result = r.getUpperBound();
}
return result;
}
/**
* Returns the range of the values in this dataset's domain.
*
* @param includeInterval a flag that controls whether or not the
* x-intervals are taken into account.
*
* @return The range.
*/
public Range getDomainBounds(boolean includeInterval) {
List keys = this.values.getRowKeys();
if (keys.isEmpty()) {
return null;
}
TimePeriod first = (TimePeriod) keys.get(0);
TimePeriod last = (TimePeriod) keys.get(keys.size() - 1);
if (!includeInterval || this.domainIsPointsInTime) {
return new Range(getXValue(first), getXValue(last));
}
else {
return new Range(first.getStart().getTime(),
last.getEnd().getTime());
}
}
/**
* Tests this dataset for equality with an arbitrary object.
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof TimeTableXYDataset)) {
return false;
}
TimeTableXYDataset that = (TimeTableXYDataset) obj;
if (this.domainIsPointsInTime != that.domainIsPointsInTime) {
return false;
}
if (this.xPosition != that.xPosition) {
return false;
}
if (!this.workingCalendar.getTimeZone().equals(
that.workingCalendar.getTimeZone())
) {
return false;
}
if (!this.values.equals(that.values)) {
return false;
}
return true;
}
/**
* Returns a clone of this dataset.
*
* @return A clone.
*
* @throws CloneNotSupportedException if the dataset cannot be cloned.
*/
public Object clone() throws CloneNotSupportedException {
TimeTableXYDataset clone = (TimeTableXYDataset) super.clone();
clone.values = (DefaultKeyedValues2D) this.values.clone();
clone.workingCalendar = (Calendar) this.workingCalendar.clone();
return clone;
}
}
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