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.engine.data;
029:
030: import java.util.Collection;
031: import java.util.Iterator;
032:
033: import net.sf.jasperreports.engine.JRException;
034: import net.sf.jasperreports.engine.JRField;
035:
036: /**
037: * @author Teodor Danciu (teodord@users.sourceforge.net)
038: * @version $Id: JRBeanCollectionDataSource.java 1229 2006-04-19 10:27:35Z teodord $
039: */
040: public class JRBeanCollectionDataSource extends
041: JRAbstractBeanDataSource {
042:
043: /**
044: *
045: */
046: private Collection data = null;
047: private Iterator iterator = null;
048: private Object currentBean = null;
049:
050: /**
051: *
052: */
053: public JRBeanCollectionDataSource(Collection beanCollection) {
054: this (beanCollection, true);
055: }
056:
057: /**
058: *
059: */
060: public JRBeanCollectionDataSource(Collection beanCollection,
061: boolean isUseFieldDescription) {
062: super (isUseFieldDescription);
063:
064: this .data = beanCollection;
065:
066: if (this .data != null) {
067: this .iterator = this .data.iterator();
068: }
069: }
070:
071: /**
072: *
073: */
074: public boolean next() {
075: boolean hasNext = false;
076:
077: if (this .iterator != null) {
078: hasNext = this .iterator.hasNext();
079:
080: if (hasNext) {
081: this .currentBean = this .iterator.next();
082: }
083: }
084:
085: return hasNext;
086: }
087:
088: /**
089: *
090: */
091: public Object getFieldValue(JRField field) throws JRException {
092: return getFieldValue(currentBean, field);
093: }
094:
095: /**
096: *
097: */
098: public void moveFirst() {
099: if (this.data != null) {
100: this.iterator = this.data.iterator();
101: }
102: }
103:
104: }
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