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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.layoutprocessor;
import org.libreoffice.report.pentaho.model.OfficeGroup;
import org.libreoffice.report.pentaho.model.OfficeGroupSection;
import org.jfree.layouting.util.AttributeMap;
import org.jfree.report.DataSourceException;
import org.jfree.report.JFreeReportInfo;
import org.jfree.report.ReportDataFactoryException;
import org.jfree.report.ReportProcessingException;
import org.jfree.report.flow.FlowController;
import org.jfree.report.flow.ReportTarget;
import org.jfree.report.flow.layoutprocessor.ElementLayoutController;
import org.jfree.report.flow.layoutprocessor.LayoutController;
import org.jfree.report.flow.layoutprocessor.SectionLayoutController;
import org.jfree.report.structure.Element;
/**
* Todo: Document me!
*
* @since 15.03.2007
*/
public class OfficeGroupLayoutController extends SectionLayoutController
implements OfficeRepeatingStructureLayoutController
{
private static final int STATE_PROCESS_REPEATING_HEADER = 0;
private static final int STATE_PROCESS_REPEATING_FOOTER = 1;
public static final int STATE_PROCESS_NORMAL_FLOW = 3;
private boolean waitForJoin;
private int state;
private VariablesCollection variablesCollection;
private boolean repeatHeader;
private boolean repeatFooter;
/**
* Initializes the layout controller. This method is called exactly once. It
* is the creators responsibility to call this method.
*
* <p>Calling initialize after the first advance must result in a
* IllegalStateException.</p>
*
* @param node the currently processed object or layout node.
* @param flowController the current flow controller.
* @param parent the parent layout controller that was responsible for
* instantiating this controller.
* @throws org.jfree.report.DataSourceException
* if there was a problem reading data from the datasource.
* @throws org.jfree.report.ReportProcessingException
* if there was a general problem during the report processing.
* @throws org.jfree.report.ReportDataFactoryException
* if a query failed.
*/
@Override
public void initialize(final Object node,
final FlowController flowController,
final LayoutController parent)
throws DataSourceException, ReportDataFactoryException,
ReportProcessingException
{
super.initialize(node, flowController, parent);
state = OfficeGroupLayoutController.STATE_PROCESS_REPEATING_HEADER;
variablesCollection = new VariablesCollection(computeVariablesPrefix());
final OfficeGroup group = (OfficeGroup) getElement();
final OfficeGroupSection header = group.getHeader();
repeatHeader = (header != null && header.isRepeatSection());
final OfficeGroupSection footer = group.getFooter();
repeatFooter = (footer != null && footer.isRepeatSection());
}
@Override
protected LayoutController processContent(final ReportTarget target)
throws DataSourceException, ReportProcessingException,
ReportDataFactoryException
{
if (state == OfficeGroupLayoutController.STATE_PROCESS_REPEATING_HEADER)
{
final OfficeGroupLayoutController controller =
(OfficeGroupLayoutController) clone();
controller.state =
OfficeGroupLayoutController.STATE_PROCESS_REPEATING_FOOTER;
if (!repeatHeader)
{
return controller;
}
final OfficeGroup group = (OfficeGroup) getElement();
final OfficeGroupSection header = group.getHeader();
if (header == null)
{
return controller;
}
controller.waitForJoin = true;
return processChild(controller, header, getFlowController());
}
if (state == OfficeGroupLayoutController.STATE_PROCESS_REPEATING_FOOTER)
{
final OfficeGroupLayoutController controller =
(OfficeGroupLayoutController) clone();
controller.state = OfficeGroupLayoutController.STATE_PROCESS_NORMAL_FLOW;
if (!repeatFooter)
{
return controller;
}
final OfficeGroup group = (OfficeGroup) getElement();
final OfficeGroupSection footer = group.getFooter();
if (footer == null)
{
return controller;
}
controller.waitForJoin = true;
return processChild(controller, footer, getFlowController());
}
return super.processContent(target);
}
/**
* Joins with a delegated process flow. This is generally called from a child
* flow and should *not* (I mean it!) be called from outside. If you do,
* you'll suffer.
*
* @param flowController the flow controller of the parent.
* @return the joined layout controller that incorperates all changes from the
* delegate.
*/
@Override
public LayoutController join(final FlowController flowController)
{
if (waitForJoin)
{
final OfficeGroupLayoutController derived = (OfficeGroupLayoutController) clone();
derived.setProcessingState(ElementLayoutController.OPENED);
derived.setFlowController(flowController);
derived.waitForJoin = false;
return derived;
}
return super.join(flowController);
}
public boolean isNormalFlowProcessing()
{
return state == OfficeGroupLayoutController.STATE_PROCESS_NORMAL_FLOW;
}
private String computeVariablesPrefix()
{
int count = 0;
LayoutController lc = this;
while (lc != null)
{
if (lc instanceof OfficeGroupLayoutController)
{
count++;
}
lc = lc.getParent();
}
return "auto_group_" + count + "_";
}
public VariablesCollection getVariablesCollection()
{
return variablesCollection;
}
@Override
protected AttributeMap computeAttributes(final FlowController fc, final Element element, final ReportTarget target)
throws DataSourceException
{
final AttributeMap map = new AttributeMap(super.computeAttributes(fc, element, target));
final String value = String.valueOf(repeatHeader || repeatFooter);
map.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, "repeating-header-or-footer", value);
map.makeReadOnly();
return map;
}
}
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