001: /*
002: * ============================================================================
003: * GNU Lesser General Public License
004: * ============================================================================
005: *
006: * JasperReports - Free Java report-generating library.
007: * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
008: *
009: * This library is free software; you can redistribute it and/or
010: * modify it under the terms of the GNU Lesser General Public
011: * License as published by the Free Software Foundation; either
012: * version 2.1 of the License, or (at your option) any later version.
013: *
014: * This library is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017: * Lesser General Public 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
022: *
023: * JasperSoft Corporation
024: * 303 Second Street, Suite 450 North
025: * San Francisco, CA 94107
026: * http://www.jaspersoft.com
027: */
028: package net.sf.jasperreports.charts.base;
029:
030: import net.sf.jasperreports.charts.JRDataRange;
031: import net.sf.jasperreports.engine.JRConstants;
032: import net.sf.jasperreports.engine.JRExpression;
033: import net.sf.jasperreports.engine.JRExpressionCollector;
034: import net.sf.jasperreports.engine.base.JRBaseObjectFactory;
035:
036: import java.io.Serializable;
037:
038: /**
039: * An immutable instantiation of a <code>JRDataRange</code>, suitable for holding
040: * a range.
041: *
042: * @author Barry Klawans (bklawans@users.sourceforge.net)
043: * @version $Id: JRBaseDataRange.java 1793 2007-07-30 09:06:18Z teodord $
044: */
045: public class JRBaseDataRange implements JRDataRange, Serializable {
046: /**
047: *
048: */
049: private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
050:
051: /**
052: * The expression used to calculate the lower bound of the range.
053: */
054: protected JRExpression lowExpression = null;
055:
056: /**
057: * The expression used to calculate the upper bound of the range.
058: */
059: protected JRExpression highExpression = null;
060:
061: /**
062: * Constructs a copy of an existing range.
063: *
064: * @param dataRange the range to copy
065: */
066: public JRBaseDataRange(JRDataRange dataRange) {
067: if (dataRange != null) {
068: this .lowExpression = dataRange.getLowExpression();
069: this .highExpression = dataRange.getHighExpression();
070: }
071: }
072:
073: /**
074: * Creates a copy of an existing range and registers all of the expressions
075: * with a factory object. Once the expressions have been registered they will
076: * be included when the report is compiled.
077: *
078: * @param dataRange the range to copy
079: * @param factory the factory to register the expressions with
080: */
081: public JRBaseDataRange(JRDataRange dataRange,
082: JRBaseObjectFactory factory) {
083: factory.put(dataRange, this );
084:
085: lowExpression = factory.getExpression(dataRange
086: .getLowExpression());
087: highExpression = factory.getExpression(dataRange
088: .getHighExpression());
089: }
090:
091: /**
092: *
093: */
094: public JRExpression getLowExpression() {
095: return lowExpression;
096: }
097:
098: /**
099: *
100: */
101: public JRExpression getHighExpression() {
102: return highExpression;
103: }
104:
105: /**
106: * Registers all of the expressions with the collector. If the expressions
107: * have been registered with one of the report's factory they will be included
108: * when the report is compiled.
109: *
110: * @param collector the expression collector to use
111: */
112: public void collectExpressions(JRExpressionCollector collector) {
113: collector.collect(this);
114: }
115:
116: }
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