Frames | No Frames |
1: /** 2: * ======================================== 3: * JFreeReport : a free Java report library 4: * ======================================== 5: * 6: * Project Info: http://reporting.pentaho.org/ 7: * 8: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 9: * 10: * This library is free software; you can redistribute it and/or modify it under the terms 11: * of the GNU Lesser General Public License as published by the Free Software Foundation; 12: * either version 2.1 of the License, or (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16: * See the GNU Lesser General Public License for more details. 17: * 18: * You should have received a copy of the GNU Lesser General Public License along with this 19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 20: * Boston, MA 02111-1307, USA. 21: * 22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 23: * in the United States and other countries.] 24: * 25: * ------------ 26: * $Id: StaticTextLayoutController.java 2725 2007-04-01 18:49:29Z taqua $ 27: * ------------ 28: * (C) Copyright 2000-2005, by Object Refinery Limited. 29: * (C) Copyright 2005-2007, by Pentaho Corporation. 30: */ 31: 32: package org.jfree.report.flow.layoutprocessor; 33: 34: import org.jfree.report.DataSourceException; 35: import org.jfree.report.ReportDataFactoryException; 36: import org.jfree.report.ReportProcessingException; 37: import org.jfree.report.flow.FlowController; 38: import org.jfree.report.flow.ReportTarget; 39: import org.jfree.report.structure.StaticText; 40: 41: /** 42: * Creation-Date: 24.11.2006, 15:06:56 43: * 44: * @author Thomas Morgner 45: */ 46: public class StaticTextLayoutController extends AbstractLayoutController 47: { 48: public static final int NOT_STARTED = 0; 49: public static final int FINISHED = 2; 50: 51: private int state; 52: 53: public StaticTextLayoutController() 54: { 55: } 56: 57: /** 58: * Advances the processing position. 59: * 60: * @param target the report target that receives generated events. 61: * @return the new layout controller instance representing the new state. 62: * 63: * @throws DataSourceException if there was a problem reading data from 64: * the datasource. 65: * @throws ReportProcessingException if there was a general problem during 66: * the report processing. 67: * @throws ReportDataFactoryException if a query failed. 68: */ 69: public LayoutController advance(final ReportTarget target) 70: throws DataSourceException, ReportDataFactoryException, ReportProcessingException 71: { 72: if (state != StaticTextLayoutController.NOT_STARTED) 73: { 74: throw new IllegalStateException(); 75: } 76: 77: final StaticText text = (StaticText) getNode(); 78: target.processText(text.getText()); 79: 80: final StaticTextLayoutController derived = (StaticTextLayoutController) clone(); 81: derived.state = StaticTextLayoutController.FINISHED; 82: return derived; 83: } 84: 85: /** 86: * Joins with a delegated process flow. This is generally called from a child 87: * flow and should *not* (I mean it!) be called from outside. If you do, 88: * you'll suffer. 89: * 90: * @param flowController the flow controller of the parent. 91: * @return the joined layout controller that incorperates all changes from 92: * the delegate. 93: */ 94: public LayoutController join(final FlowController flowController) 95: { 96: throw new UnsupportedOperationException("Static text does not have childs."); 97: } 98: 99: /** 100: * Checks, whether the layout controller would be advanceable. If this method 101: * returns true, it is generally safe to call the 'advance()' method. 102: * 103: * @return true, if the layout controller is advanceable, false otherwise. 104: */ 105: public boolean isAdvanceable() 106: { 107: return state != StaticTextLayoutController.FINISHED; 108: } 109: 110: /** 111: * Derives a copy of this controller that is suitable to perform a 112: * precomputation. The returned layout controller must be independent from 113: * the it's anchestor controller. 114: * 115: * @param fc a new flow controller for the precomputation. 116: * @return a copy that is suitable for precomputation. 117: */ 118: public LayoutController createPrecomputeInstance(final FlowController fc) 119: { 120: throw new UnsupportedOperationException 121: ("Static Text does not perform any precomputation."); 122: } 123: }