timeseries.html

jfreechart1。0。2的api。

<FONT color="green">424</FONT>        }<a name="line.424"></a>
<FONT color="green">425</FONT>    <a name="line.425"></a>
<FONT color="green">426</FONT>        /**<a name="line.426"></a>
<FONT color="green">427</FONT>         * Returns the value at the specified index.<a name="line.427"></a>
<FONT color="green">428</FONT>         *<a name="line.428"></a>
<FONT color="green">429</FONT>         * @param index  index of a value.<a name="line.429"></a>
<FONT color="green">430</FONT>         *<a name="line.430"></a>
<FONT color="green">431</FONT>         * @return The value (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.431"></a>
<FONT color="green">432</FONT>         */<a name="line.432"></a>
<FONT color="green">433</FONT>        public Number getValue(int index) {<a name="line.433"></a>
<FONT color="green">434</FONT>            return getDataItem(index).getValue();<a name="line.434"></a>
<FONT color="green">435</FONT>        }<a name="line.435"></a>
<FONT color="green">436</FONT>    <a name="line.436"></a>
<FONT color="green">437</FONT>        /**<a name="line.437"></a>
<FONT color="green">438</FONT>         * Returns the value for a time period.  If there is no data item with the <a name="line.438"></a>
<FONT color="green">439</FONT>         * specified period, this method will return &lt;code&gt;null&lt;/code&gt;.<a name="line.439"></a>
<FONT color="green">440</FONT>         *<a name="line.440"></a>
<FONT color="green">441</FONT>         * @param period  time period (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.441"></a>
<FONT color="green">442</FONT>         *<a name="line.442"></a>
<FONT color="green">443</FONT>         * @return The value (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.443"></a>
<FONT color="green">444</FONT>         */<a name="line.444"></a>
<FONT color="green">445</FONT>        public Number getValue(RegularTimePeriod period) {<a name="line.445"></a>
<FONT color="green">446</FONT>    <a name="line.446"></a>
<FONT color="green">447</FONT>            int index = getIndex(period);<a name="line.447"></a>
<FONT color="green">448</FONT>            if (index &gt;= 0) {<a name="line.448"></a>
<FONT color="green">449</FONT>                return getValue(index);<a name="line.449"></a>
<FONT color="green">450</FONT>            }<a name="line.450"></a>
<FONT color="green">451</FONT>            else {<a name="line.451"></a>
<FONT color="green">452</FONT>                return null;<a name="line.452"></a>
<FONT color="green">453</FONT>            }<a name="line.453"></a>
<FONT color="green">454</FONT>    <a name="line.454"></a>
<FONT color="green">455</FONT>        }<a name="line.455"></a>
<FONT color="green">456</FONT>    <a name="line.456"></a>
<FONT color="green">457</FONT>        /**<a name="line.457"></a>
<FONT color="green">458</FONT>         * Adds a data item to the series and sends a <a name="line.458"></a>
<FONT color="green">459</FONT>         * {@link org.jfree.data.general.SeriesChangeEvent} to all registered <a name="line.459"></a>
<FONT color="green">460</FONT>         * listeners.<a name="line.460"></a>
<FONT color="green">461</FONT>         *<a name="line.461"></a>
<FONT color="green">462</FONT>         * @param item  the (timeperiod, value) pair (&lt;code&gt;null&lt;/code&gt; not <a name="line.462"></a>
<FONT color="green">463</FONT>         *              permitted).<a name="line.463"></a>
<FONT color="green">464</FONT>         */<a name="line.464"></a>
<FONT color="green">465</FONT>        public void add(TimeSeriesDataItem item) {<a name="line.465"></a>
<FONT color="green">466</FONT>            add(item, true);<a name="line.466"></a>
<FONT color="green">467</FONT>        }<a name="line.467"></a>
<FONT color="green">468</FONT>            <a name="line.468"></a>
<FONT color="green">469</FONT>        /**<a name="line.469"></a>
<FONT color="green">470</FONT>         * Adds a data item to the series and sends a <a name="line.470"></a>
<FONT color="green">471</FONT>         * {@link org.jfree.data.general.SeriesChangeEvent} to all registered <a name="line.471"></a>
<FONT color="green">472</FONT>         * listeners.<a name="line.472"></a>
<FONT color="green">473</FONT>         *<a name="line.473"></a>
<FONT color="green">474</FONT>         * @param item  the (timeperiod, value) pair (&lt;code&gt;null&lt;/code&gt; not <a name="line.474"></a>
<FONT color="green">475</FONT>         *              permitted).<a name="line.475"></a>
<FONT color="green">476</FONT>         * @param notify  notify listeners?<a name="line.476"></a>
<FONT color="green">477</FONT>         */<a name="line.477"></a>
<FONT color="green">478</FONT>        public void add(TimeSeriesDataItem item, boolean notify) {<a name="line.478"></a>
<FONT color="green">479</FONT>            if (item == null) {<a name="line.479"></a>
<FONT color="green">480</FONT>                throw new IllegalArgumentException("Null 'item' argument.");<a name="line.480"></a>
<FONT color="green">481</FONT>            }<a name="line.481"></a>
<FONT color="green">482</FONT>            if (!item.getPeriod().getClass().equals(this.timePeriodClass)) {<a name="line.482"></a>
<FONT color="green">483</FONT>                StringBuffer b = new StringBuffer();<a name="line.483"></a>
<FONT color="green">484</FONT>                b.append("You are trying to add data where the time period class ");<a name="line.484"></a>
<FONT color="green">485</FONT>                b.append("is ");<a name="line.485"></a>
<FONT color="green">486</FONT>                b.append(item.getPeriod().getClass().getName());<a name="line.486"></a>
<FONT color="green">487</FONT>                b.append(", but the TimeSeries is expecting an instance of ");<a name="line.487"></a>
<FONT color="green">488</FONT>                b.append(this.timePeriodClass.getName());<a name="line.488"></a>
<FONT color="green">489</FONT>                b.append(".");<a name="line.489"></a>
<FONT color="green">490</FONT>                throw new SeriesException(b.toString());<a name="line.490"></a>
<FONT color="green">491</FONT>            }<a name="line.491"></a>
<FONT color="green">492</FONT>    <a name="line.492"></a>
<FONT color="green">493</FONT>            // make the change (if it's not a duplicate time period)...<a name="line.493"></a>
<FONT color="green">494</FONT>            boolean added = false;<a name="line.494"></a>
<FONT color="green">495</FONT>            int count = getItemCount();<a name="line.495"></a>
<FONT color="green">496</FONT>            if (count == 0) {<a name="line.496"></a>
<FONT color="green">497</FONT>                this.data.add(item);<a name="line.497"></a>
<FONT color="green">498</FONT>                added = true;<a name="line.498"></a>
<FONT color="green">499</FONT>            }<a name="line.499"></a>
<FONT color="green">500</FONT>            else {<a name="line.500"></a>
<FONT color="green">501</FONT>                RegularTimePeriod last = getTimePeriod(getItemCount() - 1);<a name="line.501"></a>
<FONT color="green">502</FONT>                if (item.getPeriod().compareTo(last) &gt; 0) {<a name="line.502"></a>
<FONT color="green">503</FONT>                    this.data.add(item);<a name="line.503"></a>
<FONT color="green">504</FONT>                    added = true;<a name="line.504"></a>
<FONT color="green">505</FONT>                }<a name="line.505"></a>
<FONT color="green">506</FONT>                else {<a name="line.506"></a>
<FONT color="green">507</FONT>                    int index = Collections.binarySearch(this.data, item);<a name="line.507"></a>
<FONT color="green">508</FONT>                    if (index &lt; 0) {<a name="line.508"></a>
<FONT color="green">509</FONT>                        this.data.add(-index - 1, item);<a name="line.509"></a>
<FONT color="green">510</FONT>                        added = true;<a name="line.510"></a>
<FONT color="green">511</FONT>                    }<a name="line.511"></a>
<FONT color="green">512</FONT>                    else {<a name="line.512"></a>
<FONT color="green">513</FONT>                        StringBuffer b = new StringBuffer();<a name="line.513"></a>
<FONT color="green">514</FONT>                        b.append("You are attempting to add an observation for ");<a name="line.514"></a>
<FONT color="green">515</FONT>                        b.append("the time period ");<a name="line.515"></a>
<FONT color="green">516</FONT>                        b.append(item.getPeriod().toString());<a name="line.516"></a>
<FONT color="green">517</FONT>                        b.append(" but the series already contains an observation");<a name="line.517"></a>
<FONT color="green">518</FONT>                        b.append(" for that time period. Duplicates are not ");<a name="line.518"></a>
<FONT color="green">519</FONT>                        b.append("permitted.  Try using the addOrUpdate() method.");<a name="line.519"></a>
<FONT color="green">520</FONT>                        throw new SeriesException(b.toString());<a name="line.520"></a>
<FONT color="green">521</FONT>                    }<a name="line.521"></a>
<FONT color="green">522</FONT>                }<a name="line.522"></a>
<FONT color="green">523</FONT>            }<a name="line.523"></a>
<FONT color="green">524</FONT>            if (added) {<a name="line.524"></a>
<FONT color="green">525</FONT>                // check if this addition will exceed the maximum item count...<a name="line.525"></a>
<FONT color="green">526</FONT>                if (getItemCount() &gt; this.maximumItemCount) {<a name="line.526"></a>
<FONT color="green">527</FONT>                    this.data.remove(0);<a name="line.527"></a>
<FONT color="green">528</FONT>                }<a name="line.528"></a>
<FONT color="green">529</FONT>    <a name="line.529"></a>
<FONT color="green">530</FONT>                removeAgedItems(false);  // remove old items if necessary, but<a name="line.530"></a>
<FONT color="green">531</FONT>                                         // don't notify anyone, because that<a name="line.531"></a>
<FONT color="green">532</FONT>                                         // happens next anyway...<a name="line.532"></a>
<FONT color="green">533</FONT>                if (notify) {<a name="line.533"></a>
<FONT color="green">534</FONT>                    fireSeriesChanged();<a name="line.534"></a>
<FONT color="green">535</FONT>                }<a name="line.535"></a>
<FONT color="green">536</FONT>            }<a name="line.536"></a>
<FONT color="green">537</FONT>    <a name="line.537"></a>
<FONT color="green">538</FONT>        }<a name="line.538"></a>
<FONT color="green">539</FONT>    <a name="line.539"></a>
<FONT color="green">540</FONT>        /**<a name="line.540"></a>
<FONT color="green">541</FONT>         * Adds a new data item to the series and sends a {@link SeriesChangeEvent}<a name="line.541"></a>
<FONT color="green">542</FONT>         * to all registered listeners.<a name="line.542"></a>
<FONT color="green">543</FONT>         *<a name="line.543"></a>
<FONT color="green">544</FONT>         * @param period  the time period (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.544"></a>
<FONT color="green">545</FONT>         * @param value  the value.<a name="line.545"></a>
<FONT color="green">546</FONT>         */<a name="line.546"></a>
<FONT color="green">547</FONT>        public void add(RegularTimePeriod period, double value) {<a name="line.547"></a>
<FONT color="green">548</FONT>            // defer argument checking...<a name="line.548"></a>
<FONT color="green">549</FONT>            add(period, value, true);<a name="line.549"></a>
<FONT color="green">550</FONT>        }<a name="line.550"></a>
<FONT color="green">551</FONT>    <a name="line.551"></a>
<FONT color="green">552</FONT>        /**<a name="line.552"></a>
<FONT color="green">553</FONT>         * Adds a new data item to the series and sends a {@link SeriesChangeEvent}<a name="line.553"></a>
<FONT color="green">554</FONT>         * to all registered listeners.<a name="line.554"></a>
<FONT color="green">555</FONT>         *<a name="line.555"></a>
<FONT color="green">556</FONT>         * @param period  the time period (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.556"></a>
<FONT color="green">557</FONT>         * @param value  the value.<a name="line.557"></a>
<FONT color="green">558</FONT>         * @param notify  notify listeners?<a name="line.558"></a>
<FONT color="green">559</FONT>         */<a name="line.559"></a>
<FONT color="green">560</FONT>        public void add(RegularTimePeriod period, double value, boolean notify) {<a name="line.560"></a>
<FONT color="green">561</FONT>            // defer argument checking...<a name="line.561"></a>
<FONT color="green">562</FONT>            TimeSeriesDataItem item = new TimeSeriesDataItem(period, value);<a name="line.562"></a>
<FONT color="green">563</FONT>            add(item, notify);<a name="line.563"></a>
<FONT color="green">564</FONT>        }<a name="line.564"></a>
<FONT color="green">565</FONT>    <a name="line.565"></a>