reportbuilder/java/org/libreoffice/report/pentaho/parser/rpt/MasterDetailReadHandler.java


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/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
package org.libreoffice.report.pentaho.parser.rpt;

import org.libreoffice.report.pentaho.OfficeNamespaces;
import org.libreoffice.report.pentaho.model.ObjectOleElement;
import org.libreoffice.report.pentaho.parser.ElementReadHandler;

import org.jfree.report.structure.Element;

import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

public class MasterDetailReadHandler extends ElementReadHandler
{

    private final ObjectOleElement element;
    private final boolean parseMasterDetail;

    public MasterDetailReadHandler(final ObjectOleElement element)
    {
        this.element = element;
        parseMasterDetail = false;
    }

    private MasterDetailReadHandler(final ObjectOleElement element, final boolean parseMasterDetail)
    {
        this.element = element;
        this.parseMasterDetail = parseMasterDetail;
    }

    /**
     * Starts parsing.
     *
     * @param attrs the attributes.
     * @throws org.xml.sax.SAXException if there is a parsing error.
     */
    @Override
    protected void startParsing(final Attributes attrs) throws SAXException
    {
        super.startParsing(attrs);
        if (parseMasterDetail)
        {
            final String master = attrs.getValue(OfficeNamespaces.OOREPORT_NS, "master");
            if (master != null && master.length() > 0)
            {
                final String detail = attrs.getValue(OfficeNamespaces.OOREPORT_NS, "detail");
                element.addMasterDetailFields(master, detail);
            }
        }
    }

    /**
     * Returns the handler for a child element.
     *
     * @param tagName the tag name.
     * @param atts    the attributes.
     * @return the handler or null, if the tagname is invalid.
     * @throws org.xml.sax.SAXException if there is a parsing error.
     */
    @Override
    protected XmlReadHandler getHandlerForChild(final String uri,
            final String tagName,
            final Attributes atts)
            throws SAXException
    {
        if (OfficeNamespaces.OOREPORT_NS.equals(uri) && "master-detail-field".equals(tagName))
        {
            // expect a report control. The control will modify the current
            // element (as we do not separate the elements that strictly...)
            return new MasterDetailReadHandler(element, true);
        }

        return null;
    }

    @Override
    public Element getElement()
    {
        return element;
    }
}