import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Vector;

import dori.jasper.engine.JRBand;
import dori.jasper.engine.JRElement;
import dori.jasper.engine.JRException;
import dori.jasper.engine.JRGroup;
import dori.jasper.engine.JRImage;
import dori.jasper.engine.JRParameter;
import dori.jasper.engine.util.JRLoader;

/*
 * Created on 31/10/2003
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */

/**
 * @author bsutton
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public abstract class JasperReport
{
	static public final int FORMAT_HTML = 1;
	static public final int FORMAT_PDF = 2;


	private File m_filReport;
	private File m_filImagePath;
	private String m_strTitle;
	protected dori.jasper.engine.JasperReport m_report;
	protected Map m_mapParameters = new HashMap();

	JasperReport(
		String strReportPath,
		String strImagePath,
		String strReportTitle, 
		Map mapParameters)
		throws JRException, IOException
	{
		this(new File(strReportPath), new File(strImagePath), strReportTitle, mapParameters);
	}

	JasperReport(File filReport, File filImagePath, String strReportTitle, Map mapParameters)
		throws JRException, IOException
	{
		m_filReport = filReport;
		m_filImagePath = filImagePath;
		m_strTitle = strReportTitle;

		// Load the report.
		m_report =
			(dori.jasper.engine.JasperReport) JRLoader.loadObject(
				filReport.getPath());
		m_mapParameters.put("ReportTitle", m_strTitle);
		m_mapParameters.put("DocumentBase", filImagePath.getCanonicalPath());
		if (mapParameters != null)
			setParameters(mapParameters);

	}

	void setParameter(String strKey, Object oValue)
	{
		m_mapParameters.put(strKey, oValue);
	}

	void setParameters(Map mapParameters)
	{
		m_mapParameters.putAll(mapParameters);
	}

	void validate() throws JRException
	{
		// Check that all of the reports required parameters have been set.
		HashMap mapParameters = new HashMap(m_mapParameters);

		JRParameter[] aParams = m_report.getParameters();
		for (int i = 0; i < aParams.length; i++)
		{
			String strName = aParams[i].getName();
			if (!m_mapParameters.containsKey(strName))
				throw new JRException(
					"Required Jasper Parameter "
						+ strName
						+ " not passed to report.");
			mapParameters.remove(strName);
		}

		// Check that there is a JRParameter for every parameter passed in 
		if (mapParameters.size() != 0)
			throw new JRException(
				"The following parameters were not found in the Report: "
					+ mapParameters.toString());
	}

	

	/**
	 * @return
	 */
	public Iterator getImageFiles()
	{
		JRBand[] aBands = getBands();

		Vector vImages = new Vector();
		for (int i = 0; i < aBands.length; i++)
		{
			JRElement[] elements = aBands[i].getElements();
			if (elements != null)
			{
				for (int j = 0; j < elements.length; j++)
				{
					if (elements[j] instanceof JRImage)
					{
						JRImage image = (JRImage) elements[j];
						String strExpression = image.getExpression().getText();
						File filImage =
							new File(evaluate(strExpression));
						vImages.add(filImage);
					}
				}
			}
		}

		return vImages.iterator();
	}

	/**
	 * @param strExpression
	 * TODO: enhance evaluate to emulate the Jasper expression evaulation as
	 * per dori.jasper.engine.fill.evaluateImage().
	 */
	private String evaluate(String strExpression)
	{
		if (strExpression.charAt(0) == '"'
		&& strExpression.charAt(strExpression.length() - 1) == '"')
			strExpression = strExpression.substring(1, strExpression.length() - 1);
		
		// Replace a double backslash with a single backslash
		int nLen = 	0;
		while (nLen != strExpression.length())
		{
			nLen = strExpression.length();
			strExpression = strExpression.replaceAll("\\\\\\\\", "\\\\");
		}
			 
		return strExpression;
	}

	public JRBand[] getBands()
	{
		Vector vBands = new Vector();
		vBands.add(m_report.getBackground());
		vBands.add(m_report.getColumnFooter());
		vBands.add(m_report.getColumnHeader());
		vBands.add(m_report.getDetail());
		vBands.add(m_report.getPageFooter());
		vBands.add(m_report.getPageHeader());
		vBands.add(m_report.getSummary());
		vBands.add(m_report.getTitle());

		JRGroup[] groups = m_report.getGroups();
		if (groups != null)
		{
			for (int i = 0; i < groups.length; i++)
			{
				vBands.add(groups[i].getGroupFooter());
				vBands.add(groups[i].getGroupHeader());
			}
		}

		JRBand[] aBand = new JRBand[1];
		aBand = (JRBand[]) vBands.toArray(aBand);
		return aBand;
	}
}