/*************************************************************************************
 * Copyright (c) 2004 Actuate Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Actuate Corporation - Initial implementation.
 ************************************************************************************/

package org.eclipse.birt.report.context;

import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.eclipse.birt.report.IBirtConstants;
import org.eclipse.birt.report.engine.api.EngineException;
import org.eclipse.birt.report.engine.api.IReportDocument;
import org.eclipse.birt.report.engine.api.IReportRunnable;
import org.eclipse.birt.report.exception.ViewerException;
import org.eclipse.birt.report.exception.ViewerValidationException;
import org.eclipse.birt.report.model.api.ConfigVariableHandle;
import org.eclipse.birt.report.model.api.DesignEngine;
import org.eclipse.birt.report.model.api.ParameterHandle;
import org.eclipse.birt.report.model.api.ReportDesignHandle;
import org.eclipse.birt.report.model.api.SessionHandle;
import org.eclipse.birt.report.model.api.elements.structures.ConfigVariable;
import org.eclipse.birt.report.resource.BirtResources;
import org.eclipse.birt.report.resource.ResourceConstants;
import org.eclipse.birt.report.service.BirtReportServiceFactory;
import org.eclipse.birt.report.service.BirtViewerReportDesignHandle;
import org.eclipse.birt.report.service.ParameterDataTypeConverter;
import org.eclipse.birt.report.service.ReportEngineService;
import org.eclipse.birt.report.service.api.IViewerReportDesignHandle;
import org.eclipse.birt.report.service.api.IViewerReportService;
import org.eclipse.birt.report.service.api.InputOptions;
import org.eclipse.birt.report.service.api.ParameterDefinition;
import org.eclipse.birt.report.service.api.ReportServiceException;
import org.eclipse.birt.report.utility.BirtUtility;
import org.eclipse.birt.report.utility.DataUtil;
import org.eclipse.birt.report.utility.ParameterAccessor;

import com.ibm.icu.util.ULocale;

/**
 * Data bean for viewing request. Birt viewer distributes process logic into
 * viewer fragments. Each fragment seperates its front-end and back-end process
 * into jsp page and "code behand" fragment class. Viewer attribute bean serves
 * as:
 * <ol>
 * <li> object that carries the data shared among different fragments</li>
 * <li> object that carries the date shared between front-end jsp page and
 * back-end class</li>
 * </ol>
 * In current implementation, ViewerAttributeBean uses request scope.
 * <p>
 */
public class ViewerAttributeBean extends BaseAttributeBean
{

	/**
	 * Report parameters as string map
	 */
	private Map parametersAsString = null;

	/**
	 * Report parameter definitions List
	 */
	private Collection parameterDefList = null;

	/**
	 * Display Text of Select Parameters
	 */
	private Map displayTexts = null;

	/**
	 * Module Options
	 */
	private Map moduleOptions = null;

	/**
	 * Request Type
	 */
	private String requestType;

	/**
	 * Default parameter values map
	 */
	private Map defaultValues;

	/**
	 * Locale parameter list
	 */
	private List locParams;

	/**
	 * Constructor.
	 * 
	 * @param request
	 */
	public ViewerAttributeBean( HttpServletRequest request )
	{
		try
		{
			init( request );
		}
		catch ( Exception e )
		{
			this.exception = e;
		}
	}

	/**
	 * Init the bean.
	 * 
	 * @param request
	 * @throws Exception
	 */
	protected void __init( HttpServletRequest request ) throws Exception
	{
		// If GetImage operate, return directly.
		if ( ParameterAccessor.isGetImageOperator( request )
				&& ( IBirtConstants.SERVLET_PATH_FRAMESET
						.equalsIgnoreCase( request.getServletPath( ) )
						|| IBirtConstants.SERVLET_PATH_OUTPUT
								.equalsIgnoreCase( request.getServletPath( ) )
						|| IBirtConstants.SERVLET_PATH_RUN
								.equalsIgnoreCase( request.getServletPath( ) ) || IBirtConstants.SERVLET_PATH_PREVIEW
						.equalsIgnoreCase( request.getServletPath( ) ) ) )
		{
			return;
		}

		this.category = "BIRT"; //$NON-NLS-1$
		this.masterPageContent = ParameterAccessor
				.isMasterPageContent( request );
		this.isDesigner = ParameterAccessor.isDesigner( );
		
		if ( !ParameterAccessor.isBookmarkReportlet( request ) )
		{
			this.bookmark = ParameterAccessor.getBookmark( request );
		}
		else
		{
			this.bookmark = null;
		}		
		
		this.isToc = ParameterAccessor.isToc( request );
		this.reportPage = ParameterAccessor.getPage( request );
		this.reportPageRange = ParameterAccessor.getPageRange( request );
		this.action = ParameterAccessor.getAction( request );

		// If use frameset/output/download/extract servlet pattern, generate
		// document
		// from design file
		if ( IBirtConstants.SERVLET_PATH_FRAMESET.equalsIgnoreCase( request
				.getServletPath( ) )
				|| IBirtConstants.SERVLET_PATH_OUTPUT.equalsIgnoreCase( request
						.getServletPath( ) )
				|| IBirtConstants.SERVLET_PATH_DOWNLOAD
						.equalsIgnoreCase( request.getServletPath( ) )
				|| IBirtConstants.SERVLET_PATH_EXTRACT
						.equalsIgnoreCase( request.getServletPath( ) ) )
		{
			this.reportDocumentName = ParameterAccessor.getReportDocument(
					request, null, true );
		}
		else
		{
			this.reportDocumentName = ParameterAccessor.getReportDocument(
					request, null, false );
		}

		this.reportDesignName = ParameterAccessor.getReport( request, null );

		this.emitterId = ParameterAccessor.getEmitterId( request );
		
		// If print action, force to use postscript format
		this.format = ParameterAccessor.getFormat( request );
		if ( IBirtConstants.ACTION_PRINT.equalsIgnoreCase( action ) )
		{
			// Check whether turn on this funtion
			if ( ParameterAccessor.isSupportedPrintOnServer )
			{
				this.format = IBirtConstants.POSTSCRIPT_RENDER_FORMAT;
				this.emitterId = null;
			}
			else
			{
				this.action = null;
			}
		}

		// Set locale information
		BirtResources.setLocale( ParameterAccessor.getLocale( request ) );

		// Set the request type
		this.requestType = request
				.getHeader( ParameterAccessor.HEADER_REQUEST_TYPE );

		// Determine the report design and doc 's timestamp
		processReport( request );

		// Report title.
		this.reportTitle = ParameterAccessor.getTitle( request );

		// Set whether show the report title
		this.isShowTitle = ParameterAccessor.isShowTitle( request );

		// Set whether show the toolbar
		this.isShowToolbar = ParameterAccessor.isShowToolbar( request );

		// Set whether show the navigation bar
		this.isShowNavigationbar = ParameterAccessor
				.isShowNavigationbar( request );

		// get some module options
		this.moduleOptions = BirtUtility.getModuleOptions( request );

		this.reportDesignHandle = getDesignHandle( request );
		if ( this.reportDesignHandle == null )
			throw new ViewerException(
					ResourceConstants.GENERAL_EXCEPTION_NO_REPORT_DESIGN );

		// set clean flag
		ParameterAccessor.setClean( request );

		// Initialize report parameters.
		__initParameters( request );
	}

	/**
	 * Prepare the report parameters
	 * 
	 * @param request
	 * @throws Exception
	 */
	protected void __initParameters( HttpServletRequest request )
			throws Exception
	{
		InputOptions options = new InputOptions( );
		options.setOption( InputOptions.OPT_REQUEST, request );
		options.setOption( InputOptions.OPT_LOCALE, locale );
		options.setOption( InputOptions.OPT_TIMEZONE, timeZone );
		options.setOption( InputOptions.OPT_RTL, Boolean.valueOf( rtl ) );

		// Get parameter definition list
		this.parameterDefList = getReportService( ).getParameterDefinitions(
				this.reportDesignHandle, options, false );

		// when use run/parameter in designer and not SOAP request, parse
		// parameters from config file
		if ( this.isDesigner
				&& ( IBirtConstants.SERVLET_PATH_RUN.equalsIgnoreCase( request
						.getServletPath( ) ) || IBirtConstants.SERVLET_PATH_PARAMETER
						.equalsIgnoreCase( request.getServletPath( ) ) ) )
			parseConfigVars( request, parameterDefList );

		// Get parameters as String Map
		this.parametersAsString = getParsedParametersAsString(
				parameterDefList, request, options );

		// Check if miss parameter
		if ( documentInUrl )
			this.missingParameter = false;
		else
			this.missingParameter = BirtUtility.validateParameters(
					parameterDefList, this.parametersAsString );

		// Check if show parameter page
		this.isShowParameterPage = checkShowParameterPage( request );

		// Get parameter default values map
		this.defaultValues = getDefaultValues( this.reportDesignHandle,
				parameterDefList, request, options );

		// Get display text of select parameters
		this.displayTexts = BirtUtility.getDisplayTexts( this.parameterDefList,
				this.displayTexts, request );

		// Get locale parameter list
		this.locParams = BirtUtility.getLocParams( this.locParams, request );

		// Get parameters as Object Map
		this.parameters = (HashMap) getParsedParameters(
				this.reportDesignHandle, parameterDefList, request, options );

		// Get parameters as String Map with default value
		this.parametersAsString = getParsedParametersAsStringWithDefaultValue(
				this.parametersAsString, parameterDefList, request, options );
	}

	/**
	 * Check whether show parameter page or not
	 * 
	 * @param request
	 * @return
	 */
	private boolean checkShowParameterPage( HttpServletRequest request )
	{
		if ( !ParameterAccessor.HEADER_REQUEST_TYPE_SOAP
				.equalsIgnoreCase( this.requestType )
				&& !IBirtConstants.SERVLET_PATH_DOWNLOAD
						.equalsIgnoreCase( request.getServletPath( ) ) )
		{
			String showParameterPage = ParameterAccessor
					.getShowParameterPage( request );
			if ( "false".equalsIgnoreCase( showParameterPage ) ) //$NON-NLS-1$
			{
				return false;
			}

			if ( "true".equalsIgnoreCase( showParameterPage ) ) //$NON-NLS-1$
			{
				return true;
			}
		}

		return this.missingParameter;
	}

	/**
	 * parse paramenters from config file.
	 * 
	 * @param request
	 *            HttpServletRequest
	 * @param parameterList
	 *            Collection
	 * @return
	 */
	protected void parseConfigVars( HttpServletRequest request,
			Collection parameterList )
	{
		this.configMap = new HashMap( );

		if ( this.displayTexts == null )
			this.displayTexts = new HashMap( );

		// get report config file
		String reportConfigName = ParameterAccessor
				.getConfigFileName( this.reportDesignName );
		if ( reportConfigName == null )
			return;

		// Generate the session handle
		SessionHandle sessionHandle = new DesignEngine( null )
				.newSessionHandle( ULocale.US );
		ReportDesignHandle handle = null;

		try
		{
			// Open report config file
			handle = sessionHandle.openDesign( reportConfigName );

			// handle config vars
			if ( handle != null )
			{
				String displayTextParam = null;
				Iterator configVars = handle.configVariablesIterator( );
				while ( configVars != null && configVars.hasNext( ) )
				{
					ConfigVariableHandle configVar = (ConfigVariableHandle) configVars
							.next( );
					if ( configVar != null )
					{
						String varName = prepareConfigVarName( configVar
								.getName( ) );
						Object varValue = configVar.getValue( );

						if ( varName == null || varValue == null )
							continue;

						String tempName = varName;
						String paramName = null;

						// check if null parameter
						if ( varName.toLowerCase( ).startsWith(
								ParameterAccessor.PARAM_ISNULL ) )
						{
							tempName = (String) varValue;
						}
						// check if display text of select parameter
						else if ( ( displayTextParam = ParameterAccessor
								.isDisplayText( varName ) ) != null )
						{
							tempName = displayTextParam;
						}

						// check the parameter whether exist or not
						paramName = getParameterName( tempName, parameterList );

						ParameterDefinition parameter = BirtUtility
								.findParameterDefinition( parameterList,
										paramName );

						if ( parameter != null )
						{
							// find cached parameter type
							String typeVarName = tempName
									+ "_" + IBirtConstants.PROP_TYPE + "_"; //$NON-NLS-1$ //$NON-NLS-2$
							ConfigVariable typeVar = handle
									.findConfigVariable( typeVarName );

							// get cached parameter type
							String dataType = ParameterDataTypeConverter
									.ConvertDataType( parameter.getDataType( ) );
							String cachedDateType = null;
							if ( typeVar != null )
								cachedDateType = typeVar.getValue( );

							// if null or data type changed, skip it
							if ( cachedDateType == null
									|| !cachedDateType
											.equalsIgnoreCase( dataType ) )
								continue;

							// find cached parameter value expression
							String exprVarName = tempName + "_" //$NON-NLS-1$
									+ IBirtConstants.PROP_EXPR + "_"; //$NON-NLS-1$
							ConfigVariable exprVar = handle
									.findConfigVariable( exprVarName );
							String cachedExpr = null;
							if ( exprVar != null )
								cachedExpr = exprVar.getValue( );
							if ( cachedExpr == null )
								cachedExpr = ""; //$NON-NLS-1$

							String expr = parameter.getValueExpr( );
							if ( expr == null )
								expr = ""; //$NON-NLS-1$

							// if value expression changed,skip it
							if ( !cachedExpr.equals( expr ) )
								continue;

							// multi-value parameter
							List values = null;
							if ( parameter.isMultiValue( ) )
							{
								values = (List) this.configMap.get( paramName );
								if ( values == null )
								{
									values = new ArrayList( );
									this.configMap.put( paramName, values );
								}
							}

							// check if null parameter
							if ( varName.toLowerCase( ).startsWith(
									ParameterAccessor.PARAM_ISNULL ) )
							{
								if ( parameter.isMultiValue( ) )
									values.add( null );
								else
									this.configMap.put( paramName, null );
							}
							// check if display text of select parameter
							else if ( ( displayTextParam = ParameterAccessor
									.isDisplayText( varName ) ) != null )
							{
								this.displayTexts.put( paramName, varValue );
							}
							else
							{
								Object varObj = null;
								try
								{
									varObj = DataUtil.convert( varValue,
											parameter.getDataType( ) );
								}
								catch ( Exception e )
								{
									varObj = varValue;
								}

								if ( parameter.isMultiValue( ) )
									values.add( varObj );
								else
									this.configMap.put( paramName, varObj );
							}
						}
					}
				}

				handle.close( );
			}
		}
		catch ( Exception e )
		{
		}
	}

	/**
	 * Delete the last "_" part
	 * 
	 * @param name
	 * @return String
	 */
	private String prepareConfigVarName( String name )
	{
		int index = name.lastIndexOf( "_" ); //$NON-NLS-1$
		return name.substring( 0, index );
	}

	/**
	 * if parameter existed in config file, return the correct parameter name
	 * 
	 * @param configVarName
	 *            String
	 * @param parameterList
	 *            Collection
	 * @return String
	 */
	private String getParameterName( String configVarName,
			Collection parameterList ) throws ReportServiceException
	{
		String paramName = null;
		if ( parameterList != null )
		{
			for ( Iterator iter = parameterList.iterator( ); iter.hasNext( ); )
			{
				ParameterDefinition parameter = (ParameterDefinition) iter
						.next( );

				// get current name
				String curName = null;
				if ( parameter != null && parameter.getName( ) != null )
				{
					curName = parameter.getName( ) + "_" + parameter.getId( ); //$NON-NLS-1$
				}

				// if find the parameter exist, return true
				if ( curName != null
						&& curName.equalsIgnoreCase( configVarName ) )
				{
					paramName = parameter.getName( );
					break;
				}
			}
		}

		return paramName;
	}

	/**
	 * Returns the report design handle
	 * 
	 * @param request
	 * @throws Exception
	 * @return Report Design Handle
	 */
	protected IViewerReportDesignHandle getDesignHandle(
			HttpServletRequest request ) throws Exception
	{
		IViewerReportDesignHandle design = null;
		IReportRunnable reportRunnable = null;
		IReportDocument reportDocumentInstance = null;

		boolean isDocumentExist = ParameterAccessor.isReportParameterExist(
				request, ParameterAccessor.PARAM_REPORT_DOCUMENT );
		boolean isReportExist = ParameterAccessor.isReportParameterExist(
				request, ParameterAccessor.PARAM_REPORT );

		// if only set __document parameter
		if ( isDocumentExist && !isReportExist )
		{
			// check if document file path is valid
			boolean isValidDocument = ParameterAccessor
					.isValidFilePath( ParameterAccessor.getParameter( request,
							ParameterAccessor.PARAM_REPORT_DOCUMENT ) );

			if ( isValidDocument )
			{
				// try to open document instance
				try
				{
					reportDocumentInstance = ReportEngineService
							.getInstance( )
							.openReportDocument( this.reportDesignName,
									this.reportDocumentName, this.moduleOptions );
				}
				catch ( Exception e )
				{
				}

				if ( reportDocumentInstance != null )
				{
					reportRunnable = reportDocumentInstance.getReportRunnable( );
				}
				else
				{
					throw new ViewerException(
							ResourceConstants.GENERAL_EXCEPTION_DOCUMENT_FILE_ERROR,
							new String[]{this.reportDocumentName} );
				}
			}
			else
			{
				throw new ViewerException(
						ResourceConstants.GENERAL_EXCEPTION_DOCUMENT_ACCESS_ERROR,
						new String[]{this.reportDocumentName} );
			}

		}
		else if ( isReportExist )
		{
			if ( isDocumentExist
					&& !ParameterAccessor.isValidFilePath( ParameterAccessor
							.getParameter( request,
									ParameterAccessor.PARAM_REPORT_DOCUMENT ) ) )
			{
				throw new ViewerException(
						ResourceConstants.GENERAL_EXCEPTION_DOCUMENT_ACCESS_ERROR,
						new String[]{this.reportDocumentName} );
			}

			// try to open document instance
			try
			{
				reportDocumentInstance = ReportEngineService.getInstance( )
						.openReportDocument( this.reportDesignName,
								this.reportDocumentName, this.moduleOptions );
			}
			catch ( Exception e )
			{
			}

			// try to get runnable from design file
			if ( ParameterAccessor.isValidFilePath( ParameterAccessor
					.getParameter( request, ParameterAccessor.PARAM_REPORT ) ) )
			{
				try
				{
					// get report runnable from design file
					reportRunnable = BirtUtility.getRunnableFromDesignFile(
							request, this.reportDesignName, this.moduleOptions );

					if ( reportRunnable == null )
					{
						throw new ViewerException(
								ResourceConstants.GENERAL_EXCEPTION_REPORT_FILE_ERROR,
								new String[]{this.reportDesignName} );
					}
				}
				catch ( EngineException e )
				{
					this.exception = e;
				}
			}
		}

		if ( reportDocumentInstance != null )
		{
			this.documentInUrl = true;
			this.parameterMap = reportDocumentInstance.getParameterValues( );

			// if generating document from report isn't completed
			if ( !reportDocumentInstance.isComplete( ) && isReportExist )
				this.isDocumentProcessing = true;

			reportDocumentInstance.close( );
		}

		if ( reportRunnable != null )
		{
			design = new BirtViewerReportDesignHandle(
					IViewerReportDesignHandle.RPT_RUNNABLE_OBJECT,
					reportRunnable );
		}

		return design;
	}

	/**
	 * Determine the report design and doc 's timestamp
	 * 
	 * @param request
	 * @throws Exception
	 */
	protected void processReport( HttpServletRequest request ) throws Exception
	{
		// if request is SOAP Post or servlet path is "/download" or "/extract",
		// don't delete document file
		if ( ParameterAccessor.HEADER_REQUEST_TYPE_SOAP
				.equalsIgnoreCase( this.requestType )
				|| IBirtConstants.SERVLET_PATH_DOWNLOAD
						.equalsIgnoreCase( request.getServletPath( ) )
				|| IBirtConstants.SERVLET_PATH_EXTRACT
						.equalsIgnoreCase( request.getServletPath( ) ) )
			return;

		if ( this.reportDocumentName == null )
			return;

		File reportDocFile = new File( this.reportDocumentName );
		long lastModifiedOfDesign = getLastModifiedOfDesign( request );

		if ( lastModifiedOfDesign != -1L && reportDocFile != null
				&& reportDocFile.exists( ) && reportDocFile.isFile( ) )
		{
			if ( lastModifiedOfDesign > reportDocFile.lastModified( )
					|| ParameterAccessor.isOverwrite( request ) )
			{
				reportDocFile.delete( );
			}
		}
	}

	/**
	 * Returns lastModified of report design file. If file doesn't exist, return
	 * -1L;
	 * 
	 * @param request
	 * @return
	 */
	protected long getLastModifiedOfDesign( HttpServletRequest request )
	{
		String designFile = ParameterAccessor.getParameter( request,
				ParameterAccessor.PARAM_REPORT );
		if ( designFile == null )
			return -1L;

		// according to the working folder
		File file = new File( this.reportDesignName );
		if ( file != null && file.exists( ) )
		{
			if ( file.isFile( ) )
				return file.lastModified( );
		}
		else
		{
			// try URL resource
			try
			{
				if ( !designFile.startsWith( "/" ) ) //$NON-NLS-1$
					designFile = "/" + designFile; //$NON-NLS-1$

				URL url = request.getSession( ).getServletContext( )
						.getResource( designFile );
				if ( url != null )
					return url.openConnection( ).getLastModified( );
			}
			catch ( Exception e )
			{
			}
		}

		return -1L;
	}

	/**
	 * Get report service instance.
	 */
	protected IViewerReportService getReportService( )
	{
		return BirtReportServiceFactory.getReportService( );
	}


	/**
	 * get parsed parameters with default value.
	 * 
	 * @param design
	 *            IViewerReportDesignHandle
	 * @param parameterList
	 *            Collection
	 * @param request
	 *            HttpServletRequest
	 * @param options
	 *            InputOptions
	 * 
	 * @return Map
	 */
	protected Map getParsedParameters( IViewerReportDesignHandle design,
			Collection parameterList, HttpServletRequest request,
			InputOptions options ) throws ReportServiceException
	{
		Map params = new HashMap( );
		if ( parameterList == null || this.parametersAsString == null )
			return params;

		for ( Iterator iter = parameterList.iterator( ); iter.hasNext( ); )
		{
			// get parameter definition object
			ParameterDefinition parameter = (ParameterDefinition) iter.next( );
			if ( parameter == null )
				continue;

			String paramName = parameter.getName( );
			Object paramObj = this.parametersAsString.get( paramName );

			if ( paramObj != null )
			{
				// get parameter format
				String format = ParameterAccessor
						.getFormat( request, paramName );
				if ( format == null || format.length( ) <= 0 )
				{
					format = parameter.getPattern( );
				}

				// get parameter data type
				String dataType = ParameterDataTypeConverter
						.ConvertDataType( parameter.getDataType( ) );

				// check whether locale string
				boolean isLocale = this.locParams.contains( paramName );

				List paramList = null;
				if ( paramObj instanceof List )
				{
					// multi-value parameter
					paramList = (List) paramObj;
				}
				else
				{
					paramList = new ArrayList( );
					paramList.add( paramObj );
				}

				for ( int i = 0; i < paramList.size( ); i++ )
				{
					try
					{
						// convert parameter to object
						Object paramValueObj = DataUtil.validate( paramName,
								dataType, format, (String) paramList.get( i ),
								locale, timeZone, isLocale );
						paramList.set( i, paramValueObj );
					}
					catch ( ViewerValidationException e )
					{
						// if in PREVIEW mode, then throw exception directly
						if ( IBirtConstants.SERVLET_PATH_PREVIEW
								.equalsIgnoreCase( request.getServletPath( ) ) )
						{
							this.exception = e;
							break;
						}

						// set the wrong parameter
						paramList.set( i, paramList.get( i ) );
					}
				}

				if ( paramObj instanceof List )
				{
					List list = (List) paramObj;

					// FIXME:if list is empty or only contains null value,
					// regard it as NULL object
					if ( list.size( ) == 0
							|| ( list.size( ) == 1 && list.get( 0 ) == null ) )
						params.put( paramName, null );
					else
						params.put( paramName, paramList.toArray( ) );
				}
				else
				{
					params.put( paramName, paramList.get( 0 ) );
				}
			}
			else
			{
				Object paramValueObj = null;

				// null parameter value
				if ( !this.parametersAsString.containsKey( paramName ) )
				{
					// Get parameter default value as object
					paramValueObj = this.defaultValues.get( paramName );
				}

				if ( parameter.isMultiValue( ) )
				{
					// FIXME: if multi-value only contains null value, regard it
					// as NULL object
					if ( paramValueObj == null )
						params.put( paramName, null );
					else
						params.put( paramName, new Object[]{paramValueObj} );
				}
				else
				{
					params.put( paramName, paramValueObj );
				}
			}
		}
		return params;
	}

	/**
	 * Returns parameter default values map
	 * 
	 * @param design
	 * @param parameterList
	 * @param request
	 * @param options
	 * @return
	 * @throws ReportServiceException
	 */
	protected Map getDefaultValues( IViewerReportDesignHandle design,
			Collection parameterList, HttpServletRequest request,
			InputOptions options ) throws ReportServiceException
	{
		Map map = new HashMap( );

		// get parameter default values
		for ( Iterator iter = parameterList.iterator( ); iter.hasNext( ); )
		{
			ParameterDefinition parameter = (ParameterDefinition) iter.next( );
			if ( parameter == null )
				continue;

			String paramName = parameter.getName( );
			if ( paramName != null )
			{
				Object paramValue = this.getReportService( )
						.getParameterDefaultValue( design, paramName, options );
				map.put( paramName, paramValue );
			}
		}

		return map;
	}

	/**
	 * get parsed parameters as string.
	 * 
	 * @param parameterList
	 *            Collection
	 * @param request
	 *            HttpServletRequest
	 * @param options
	 *            InputOptions
	 * 
	 * @return Map
	 */
	protected Map getParsedParametersAsString( Collection parameterList,
			HttpServletRequest request, InputOptions options )
			throws ReportServiceException
	{
		Map params = new HashMap( );
		if ( parameterList == null )
			return params;

		for ( Iterator iter = parameterList.iterator( ); iter.hasNext( ); )
		{
			ParameterDefinition parameter = (ParameterDefinition) iter.next( );
			if ( parameter == null )
				continue;

			// get parameter name
			String paramName = parameter.getName( );
			if ( paramName == null )
				continue;

			// get parameter value
			String paramValue = null;
			if ( ParameterAccessor.isReportParameterExist( request, paramName ) )
			{
				if ( parameter.isMultiValue( ) )
				{
					// handle multi-value parameter
					List values = ParameterAccessor.getReportParameters(
							request, paramName );
					params.put( paramName, values );
				}
				else
				{
					// Get value from http request
					paramValue = ParameterAccessor.getReportParameter( request,
							paramName, null );

					params.put( paramName, paramValue );
				}
			}
			else
			{
				Object valueObj = null;
				if ( this.isDesigner
						&& ( IBirtConstants.SERVLET_PATH_RUN
								.equalsIgnoreCase( request.getServletPath( ) ) || IBirtConstants.SERVLET_PATH_PARAMETER
								.equalsIgnoreCase( request.getServletPath( ) ) )
						&& this.configMap != null
						&& this.configMap.containsKey( paramName ) )
				{
					// Get value from config file
					valueObj = this.configMap.get( paramName );
				}
				else if ( this.parameterMap != null
						&& this.parameterMap.containsKey( paramName ) )
				{
					// Get value from document
					valueObj = this.parameterMap.get( paramName );
					
					// Convert it to a List
					if ( valueObj instanceof Object[] )
					{
						Object[] values = (Object[])valueObj;
						List list = new ArrayList( values.length );
						for ( int i = 0; i < values.length; i++ )
						{
							list.add( values[i] );
						}
						valueObj = list;
					}
				}
				else
				{
					// skip it
					continue;
				}

				if ( valueObj instanceof List )
				{
					// handle multi-value parameter
					List values = (List) valueObj;

					for ( int i = 0; i < values.size( ); i++ )
					{
						paramValue = DataUtil.getDisplayValue( values.get( i ), timeZone );
						values.set( i, paramValue );
					}

					params.put( paramName, values );
				}
				else
				{
					// return String parameter value
					paramValue = DataUtil.getDisplayValue( valueObj, timeZone );
					params.put( paramName, paramValue );
				}
			}
		}

		return params;
	}

	/**
	 * get parsed parameters as string.
	 * 
	 * @param parsedParameters
	 *            Map
	 * @param parameterList
	 *            Collection
	 * @param request
	 *            HttpServletRequest
	 * @param options
	 *            InputOptions
	 * 
	 * @return Map
	 */
	protected Map getParsedParametersAsStringWithDefaultValue(
			Map aParsedParameters, Collection parameterList,
			HttpServletRequest request, InputOptions options )
			throws ReportServiceException
	{
		Map parsedParameters = aParsedParameters;
		if ( parsedParameters == null )
		{
			parsedParameters = new HashMap( );
		}

		for ( Iterator iter = parameterList.iterator( ); iter.hasNext( ); )
		{
			// get parameter definition object
			ParameterDefinition parameter = (ParameterDefinition) iter.next( );
			if ( parameter == null )
				continue;

			// get parameter name
			String paramName = parameter.getName( );
			if ( paramName == null )
				continue;

			// if miss parameter, set parameter value as default value
			if ( !parsedParameters.containsKey( paramName ) )
			{
				String paramValue = DataUtil
						.getDisplayValue( this.defaultValues.get( paramName ), timeZone );
				if ( parameter.isMultiValue( ) )
				{
					List values = new ArrayList( );
					values.add( paramValue );
					parsedParameters.put( paramName, values );
				}
				else
				{
					parsedParameters.put( paramName, paramValue );
				}
			}
		}

		return parsedParameters;
	}

	/**
	 * find the parameter handle by parameter name
	 * 
	 * @param paramName
	 * @return
	 * @throws ReportServiceException
	 */
	public ParameterHandle findParameter( String paramName )
			throws ReportServiceException
	{
		return BirtUtility.findParameter( this.reportDesignHandle, paramName );
	}

	/**
	 * find the parameter definition object by parameter name
	 * 
	 * @param paramName
	 * @return
	 */
	public ParameterDefinition findParameterDefinition( String paramName )
	{
		return BirtUtility.findParameterDefinition( this.parameterDefList,
				paramName );
	}

	/**
	 * Returns the report title
	 * 
	 * @see org.eclipse.birt.report.context.BaseAttributeBean#getReportTitle()
	 */

	public String getReportTitle( ) throws ReportServiceException
	{
		String title = BirtUtility.getTitleFromDesign( reportDesignHandle );
		if ( title == null || title.trim( ).length( ) <= 0 )
			title = reportTitle;

		return title;
	}

	/**
	 * @return the parametersAsString
	 */
	public Map getParametersAsString( )
	{
		return parametersAsString;
	}

	/**
	 * @return the parameterDefList
	 */
	public Collection getParameterDefList( )
	{
		return parameterDefList;
	}

	/**
	 * @return the displayTexts
	 */
	public Map getDisplayTexts( )
	{
		return displayTexts;
	}

	/**
	 * @return the moduleOptions
	 */
	public Map getModuleOptions( )
	{
		return moduleOptions;
	}

	/**
	 * @return the defaultValues
	 */
	public Map getDefaultValues( )
	{
		return defaultValues;
	}

}