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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ------------------ 28: * RendererState.java 29: * ------------------ 30: * (C) Copyright 2003-2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes: 36: * -------- 37: * 07-Oct-2003 : Version 1 (DG); 38: * 09-Jun-2005 : Added a convenience method to access the entity 39: * collection (DG); 40: * 41: */ 42: 43: package org.jfree.chart.renderer; 44: 45: import org.jfree.chart.ChartRenderingInfo; 46: import org.jfree.chart.entity.EntityCollection; 47: import org.jfree.chart.plot.PlotRenderingInfo; 48: 49: /** 50: * Represents the current state of a renderer. 51: */ 52: public class RendererState { 53: 54: /** The plot rendering info. */ 55: private PlotRenderingInfo info; 56: 57: /** 58: * Creates a new state object. 59: * 60: * @param info the plot rendering info. 61: */ 62: public RendererState(PlotRenderingInfo info) { 63: this.info = info; 64: } 65: 66: /** 67: * Returns the plot rendering info. 68: * 69: * @return The info. 70: */ 71: public PlotRenderingInfo getInfo() { 72: return this.info; 73: } 74: 75: /** 76: * A convenience method that returns a reference to the entity 77: * collection (may be <code>null</code>) being used to record 78: * chart entities. 79: * 80: * @return The entity collection (possibly <code>null</code>). 81: */ 82: public EntityCollection getEntityCollection() { 83: EntityCollection result = null; 84: if (this.info != null) { 85: ChartRenderingInfo owner = this.info.getOwner(); 86: if (owner != null) { 87: result = owner.getEntityCollection(); 88: } 89: } 90: return result; 91: } 92: 93: }