    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jfreechart/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
    025     * Other names may be trademarks of their respective owners.]
    026     *
    027     * ------------------
    028     * RendererState.java
    029     * ------------------
    030     * (C) Copyright 2003-2008, by Object Refinery Limited.
    031     *
    032     * Original Author:  David Gilbert (for Object Refinery Limited);
    033     * Contributor(s):   -;
    034     *
    035     * Changes:
    036     * --------
    037     * 07-Oct-2003 : Version 1 (DG);
    038     * 09-Jun-2005 : Added a convenience method to access the entity
    039     *               collection (DG);
    040     *
    041     */
    042
    043    package org.jfree.chart.renderer;
    044
    045    import org.jfree.chart.ChartRenderingInfo;
    046    import org.jfree.chart.entity.EntityCollection;
    047    import org.jfree.chart.plot.PlotRenderingInfo;
    048
    049    /**
    050     * Represents the current state of a renderer.
    051     */
    052    public class RendererState {
    053
    054        /** The plot rendering info. */
    055        private PlotRenderingInfo info;
    056
    057        /**
    058         * Creates a new state object.
    059         *
    060         * @param info  the plot rendering info.
    061         */
    062        public RendererState(PlotRenderingInfo info) {
    063            this.info = info;
    064        }
    065
    066        /**
    067         * Returns the plot rendering info.
    068         *
    069         * @return The info.
    070         */
    071        public PlotRenderingInfo getInfo() {
    072            return this.info;
    073        }
    074
    075        /**
    076         * A convenience method that returns a reference to the entity
    077         * collection (may be <code>null</code>) being used to record
    078         * chart entities.
    079         *
    080         * @return The entity collection (possibly <code>null</code>).
    081         */
    082        public EntityCollection getEntityCollection() {
    083            EntityCollection result = null;
    084            if (this.info != null) {
    085                ChartRenderingInfo owner = this.info.getOwner();
    086                if (owner != null) {
    087                    result = owner.getEntityCollection();
    088                }
    089            }
    090            return result;
    091        }
    092
    093    }