dynamictimeseriescollection.valuesequence.html

jfreechart1。0。2的api。

<FONT color="green">439</FONT>         * @param key  the new key.<a name="line.439"></a>
<FONT color="green">440</FONT>         */<a name="line.440"></a>
<FONT color="green">441</FONT>        public void setSeriesKey(int seriesNumber, Comparable key) {<a name="line.441"></a>
<FONT color="green">442</FONT>            this.seriesKeys[seriesNumber] = key;<a name="line.442"></a>
<FONT color="green">443</FONT>        }<a name="line.443"></a>
<FONT color="green">444</FONT>    <a name="line.444"></a>
<FONT color="green">445</FONT>        /**<a name="line.445"></a>
<FONT color="green">446</FONT>         * Adds a value to a series.<a name="line.446"></a>
<FONT color="green">447</FONT>         *<a name="line.447"></a>
<FONT color="green">448</FONT>         * @param seriesNumber  the series index.<a name="line.448"></a>
<FONT color="green">449</FONT>         * @param index  ??.<a name="line.449"></a>
<FONT color="green">450</FONT>         * @param value  the value.<a name="line.450"></a>
<FONT color="green">451</FONT>         */<a name="line.451"></a>
<FONT color="green">452</FONT>        public void addValue(int seriesNumber, int index, float value) {<a name="line.452"></a>
<FONT color="green">453</FONT>    <a name="line.453"></a>
<FONT color="green">454</FONT>            invalidateRangeInfo();<a name="line.454"></a>
<FONT color="green">455</FONT>            if (seriesNumber &gt;= this.valueHistory.length) {<a name="line.455"></a>
<FONT color="green">456</FONT>                throw new IllegalArgumentException(<a name="line.456"></a>
<FONT color="green">457</FONT>                    "TimeSeriesDataset.addValue(): series #"<a name="line.457"></a>
<FONT color="green">458</FONT>                    + seriesNumber + "unspecified in c'tor"<a name="line.458"></a>
<FONT color="green">459</FONT>                );<a name="line.459"></a>
<FONT color="green">460</FONT>            }<a name="line.460"></a>
<FONT color="green">461</FONT>            if (this.valueHistory[seriesNumber] == null) {<a name="line.461"></a>
<FONT color="green">462</FONT>                this.valueHistory[seriesNumber] <a name="line.462"></a>
<FONT color="green">463</FONT>                    = new ValueSequence(this.historyCount);<a name="line.463"></a>
<FONT color="green">464</FONT>                this.seriesCount++;<a name="line.464"></a>
<FONT color="green">465</FONT>            }  <a name="line.465"></a>
<FONT color="green">466</FONT>            // But if that series array already exists, just overwrite its contents<a name="line.466"></a>
<FONT color="green">467</FONT>            //synchronized(this)<a name="line.467"></a>
<FONT color="green">468</FONT>            //{<a name="line.468"></a>
<FONT color="green">469</FONT>                this.valueHistory[seriesNumber].enterData(index, value);<a name="line.469"></a>
<FONT color="green">470</FONT>            //}<a name="line.470"></a>
<FONT color="green">471</FONT>            fireSeriesChanged();<a name="line.471"></a>
<FONT color="green">472</FONT>        }<a name="line.472"></a>
<FONT color="green">473</FONT>    <a name="line.473"></a>
<FONT color="green">474</FONT>        /**<a name="line.474"></a>
<FONT color="green">475</FONT>         * Returns the number of series in the collection.<a name="line.475"></a>
<FONT color="green">476</FONT>         *<a name="line.476"></a>
<FONT color="green">477</FONT>         * @return The series count.<a name="line.477"></a>
<FONT color="green">478</FONT>         */<a name="line.478"></a>
<FONT color="green">479</FONT>        public int getSeriesCount() {<a name="line.479"></a>
<FONT color="green">480</FONT>            return this.seriesCount;<a name="line.480"></a>
<FONT color="green">481</FONT>        }<a name="line.481"></a>
<FONT color="green">482</FONT>    <a name="line.482"></a>
<FONT color="green">483</FONT>        /**<a name="line.483"></a>
<FONT color="green">484</FONT>         * Returns the number of items in a series.<a name="line.484"></a>
<FONT color="green">485</FONT>         * &lt;p&gt;<a name="line.485"></a>
<FONT color="green">486</FONT>         * For this implementation, all series have the same number of items.<a name="line.486"></a>
<FONT color="green">487</FONT>         *<a name="line.487"></a>
<FONT color="green">488</FONT>         * @param series  the series index (zero-based).<a name="line.488"></a>
<FONT color="green">489</FONT>         *<a name="line.489"></a>
<FONT color="green">490</FONT>         * @return The item count.<a name="line.490"></a>
<FONT color="green">491</FONT>         */<a name="line.491"></a>
<FONT color="green">492</FONT>        public int getItemCount(int series) {  // all arrays equal length, <a name="line.492"></a>
<FONT color="green">493</FONT>                                               // so ignore argument:<a name="line.493"></a>
<FONT color="green">494</FONT>            return this.historyCount;<a name="line.494"></a>
<FONT color="green">495</FONT>        }<a name="line.495"></a>
<FONT color="green">496</FONT>    <a name="line.496"></a>
<FONT color="green">497</FONT>        // Methods for managing the FIFO's:<a name="line.497"></a>
<FONT color="green">498</FONT>    <a name="line.498"></a>
<FONT color="green">499</FONT>        /**<a name="line.499"></a>
<FONT color="green">500</FONT>         * Re-map an index, for use in retrieving data.<a name="line.500"></a>
<FONT color="green">501</FONT>         *<a name="line.501"></a>
<FONT color="green">502</FONT>         * @param toFetch  the index.<a name="line.502"></a>
<FONT color="green">503</FONT>         *<a name="line.503"></a>
<FONT color="green">504</FONT>         * @return The translated index.<a name="line.504"></a>
<FONT color="green">505</FONT>         */<a name="line.505"></a>
<FONT color="green">506</FONT>        protected int translateGet(int toFetch) {<a name="line.506"></a>
<FONT color="green">507</FONT>            if (this.oldestAt == 0) {<a name="line.507"></a>
<FONT color="green">508</FONT>                return toFetch;  // no translation needed<a name="line.508"></a>
<FONT color="green">509</FONT>            }<a name="line.509"></a>
<FONT color="green">510</FONT>            // else  [implicit here]<a name="line.510"></a>
<FONT color="green">511</FONT>            int newIndex = toFetch + this.oldestAt;<a name="line.511"></a>
<FONT color="green">512</FONT>            if (newIndex &gt;= this.historyCount) {<a name="line.512"></a>
<FONT color="green">513</FONT>                newIndex -= this.historyCount;<a name="line.513"></a>
<FONT color="green">514</FONT>            }<a name="line.514"></a>
<FONT color="green">515</FONT>            return newIndex;<a name="line.515"></a>
<FONT color="green">516</FONT>        }<a name="line.516"></a>
<FONT color="green">517</FONT>    <a name="line.517"></a>
<FONT color="green">518</FONT>        /**<a name="line.518"></a>
<FONT color="green">519</FONT>         * Returns the actual index to a time offset by "delta" from newestAt.<a name="line.519"></a>
<FONT color="green">520</FONT>         *<a name="line.520"></a>
<FONT color="green">521</FONT>         * @param delta  the delta.<a name="line.521"></a>
<FONT color="green">522</FONT>         *<a name="line.522"></a>
<FONT color="green">523</FONT>         * @return The offset.<a name="line.523"></a>
<FONT color="green">524</FONT>         */<a name="line.524"></a>
<FONT color="green">525</FONT>        public int offsetFromNewest(int delta) {<a name="line.525"></a>
<FONT color="green">526</FONT>            return wrapOffset(this.newestAt + delta);<a name="line.526"></a>
<FONT color="green">527</FONT>        }<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>         * ??<a name="line.530"></a>
<FONT color="green">531</FONT>         *<a name="line.531"></a>
<FONT color="green">532</FONT>         * @param delta ??<a name="line.532"></a>
<FONT color="green">533</FONT>         *<a name="line.533"></a>
<FONT color="green">534</FONT>         * @return The offset.<a name="line.534"></a>
<FONT color="green">535</FONT>         */<a name="line.535"></a>
<FONT color="green">536</FONT>        public int offsetFromOldest(int delta) {<a name="line.536"></a>
<FONT color="green">537</FONT>            return wrapOffset(this.oldestAt + delta);<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>         * ??<a name="line.541"></a>
<FONT color="green">542</FONT>         *<a name="line.542"></a>
<FONT color="green">543</FONT>         * @param protoIndex  the index.<a name="line.543"></a>
<FONT color="green">544</FONT>         *<a name="line.544"></a>
<FONT color="green">545</FONT>         * @return The offset.<a name="line.545"></a>
<FONT color="green">546</FONT>         */<a name="line.546"></a>
<FONT color="green">547</FONT>        protected int wrapOffset(int protoIndex) {<a name="line.547"></a>
<FONT color="green">548</FONT>            int tmp = protoIndex;<a name="line.548"></a>
<FONT color="green">549</FONT>            if (tmp &gt;= this.historyCount) {<a name="line.549"></a>
<FONT color="green">550</FONT>                tmp -= this.historyCount;<a name="line.550"></a>
<FONT color="green">551</FONT>            }<a name="line.551"></a>
<FONT color="green">552</FONT>            else if (tmp &lt; 0) {<a name="line.552"></a>
<FONT color="green">553</FONT>                tmp += this.historyCount;<a name="line.553"></a>
<FONT color="green">554</FONT>            }<a name="line.554"></a>
<FONT color="green">555</FONT>            return tmp;<a name="line.555"></a>
<FONT color="green">556</FONT>        }<a name="line.556"></a>
<FONT color="green">557</FONT>    <a name="line.557"></a>
<FONT color="green">558</FONT>        /**<a name="line.558"></a>
<FONT color="green">559</FONT>         * Adjust the array offset as needed when a new time-period is added:<a name="line.559"></a>
<FONT color="green">560</FONT>         * Increments the indices "oldestAt" and "newestAt", mod(array length),<a name="line.560"></a>
<FONT color="green">561</FONT>         * zeroes the series values at newestAt, returns the new TimePeriod.<a name="line.561"></a>
<FONT color="green">562</FONT>         *<a name="line.562"></a>
<FONT color="green">563</FONT>         * @return The new time period.<a name="line.563"></a>
<FONT color="green">564</FONT>         */<a name="line.564"></a>
<FONT color="green">565</FONT>        public synchronized RegularTimePeriod advanceTime() {<a name="line.565"></a>
<FONT color="green">566</FONT>            RegularTimePeriod nextInstant = this.pointsInTime[this.newestAt].next();<a name="line.566"></a>
<FONT color="green">567</FONT>            this.newestAt = this.oldestAt;  // newestAt takes value previously held <a name="line.567"></a>
<FONT color="green">568</FONT>                                            // by oldestAT<a name="line.568"></a>
<FONT color="green">569</FONT>            /*** <a name="line.569"></a>
<FONT color="green">570</FONT>             * The next 10 lines or so should be expanded if data can be negative <a name="line.570"></a>
<FONT color="green">571</FONT>             ***/<a name="line.571"></a>
<FONT color="green">572</FONT>            // if the oldest data contained a maximum Y-value, invalidate the stored<a name="line.572"></a>
<FONT color="green">573</FONT>            //   Y-max and Y-range data:<a name="line.573"></a>
<FONT color="green">574</FONT>            boolean extremaChanged = false;<a name="line.574"></a>
<FONT color="green">575</FONT>            float oldMax = 0.0f;<a name="line.575"></a>
<FONT color="green">576</FONT>            if (this.maxValue != null) {<a name="line.576"></a>
<FONT color="green">577</FONT>                oldMax = this.maxValue.floatValue();<a name="line.577"></a>
<FONT color="green">578</FONT>            }<a name="line.578"></a>
<FONT color="green">579</FONT>            for (int s = 0; s &lt; getSeriesCount(); s++) {<a name="line.579"></a>
<FONT color="green">580</FONT>                if (this.valueHistory[s].getData(this.oldestAt) == oldMax) {<a name="line.580"></a>
<FONT color="green">581</FONT>                    extremaChanged = true;<a name="line.581"></a>
<FONT color="green">582</FONT>                }<a name="line.582"></a>
<FONT color="green">583</FONT>                if (extremaChanged) {<a name="line.583"></a>
<FONT color="green">584</FONT>                    break;<a name="line.584"></a>
<FONT color="green">585</FONT>                }<a name="line.585"></a>