001: /**
002: * ========================================
003: * JFreeReport : a free Java report library
004: * ========================================
005: *
006: * Project Info: http://reporting.pentaho.org/
007: *
008: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009: *
010: * This library is free software; you can redistribute it and/or modify it under the terms
011: * of the GNU Lesser General Public License as published by the Free Software Foundation;
012: * either 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, but WITHOUT ANY WARRANTY;
015: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016: * See the GNU Lesser General Public License for more details.
017: *
018: * You should have received a copy of the GNU Lesser General Public License along with this
019: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020: * Boston, MA 02111-1307, USA.
021: *
022: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023: * in the United States and other countries.]
024: *
025: * ------------
026: * $Id: ContentElementReadHandler.java 3525 2007-10-16 11:43:48Z tmorgner $
027: * ------------
028: * (C) Copyright 2000-2005, by Object Refinery Limited.
029: * (C) Copyright 2005-2007, by Pentaho Corporation.
030: */package org.jfree.report.modules.factories.report.flow;
031:
032: import org.jfree.report.structure.ContentElement;
033: import org.jfree.report.structure.Element;
034: import org.jfree.xmlns.parser.XmlReadHandler;
035: import org.jfree.xmlns.parser.ParseException;
036: import org.xml.sax.Attributes;
037: import org.xml.sax.SAXException;
038:
039: /**
040: * Creation-Date: 09.04.2006, 14:38:32
041: *
042: * @author Thomas Morgner
043: */
044: public class ContentElementReadHandler extends
045: AbstractElementReadHandler {
046: private ValueExpressionReadHandler valueExpressionReadHandler;
047: private ContentElement ce;
048:
049: public ContentElementReadHandler() {
050: ce = new ContentElement();
051: }
052:
053: /**
054: * Starts parsing.
055: *
056: * @param attrs the attributes.
057: * @throws org.xml.sax.SAXException if there is a parsing error.
058: */
059: protected void startParsing(final Attributes attrs)
060: throws SAXException {
061: super .startParsing(attrs);
062: final String format = attrs.getValue(
063: FlowReportFactoryModule.NAMESPACE, "format");
064: ce.setAttribute(FlowReportFactoryModule.NAMESPACE, "format",
065: format);
066: }
067:
068: /**
069: * Returns the handler for a child element.
070: *
071: * @param tagName the tag name.
072: * @param atts the attributes.
073: * @return the handler or null, if the tagname is invalid.
074: * @throws SAXException if there is a parsing error.
075: */
076: protected XmlReadHandler getHandlerForChild(final String uri,
077: final String tagName, final Attributes atts)
078: throws SAXException {
079: if (isSameNamespace(uri) == false) {
080: return null;
081: }
082: if ("value-expression".equals(tagName)) {
083: valueExpressionReadHandler = new ValueExpressionReadHandler();
084: return valueExpressionReadHandler;
085: }
086: return super .getHandlerForChild(uri, tagName, atts);
087: }
088:
089: /**
090: * Done parsing.
091: *
092: * @throws SAXException if there is a parsing error.
093: */
094: protected void doneParsing() throws SAXException {
095: if (valueExpressionReadHandler == null) {
096: throw new ParseException("No valid value expression.",
097: getLocator());
098: }
099:
100: super .doneParsing();
101: configureElement(ce);
102: ce.setValueExpression(valueExpressionReadHandler
103: .getExpression());
104: }
105:
106: /**
107: * Returns the object for this element or null, if this element does not
108: * create an object.
109: *
110: * @return the object.
111: * @throws SAXException if there's a parsing error
112: */
113: public Object getObject() throws SAXException {
114: return ce;
115: }
116:
117: protected Element getElement() {
118: return ce;
119: }
120: }
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