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metacat / lib / style / skins / first / download.jsp @ 5063

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<%@page 
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import="java.util.Iterator"%><%@page 
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import="java.util.ArrayList"%><%@page 
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import="edu.ucsb.nceas.utilities.OrderedMap"%><%@page 
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import="java.util.List"%><%@page 
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import="java.util.Enumeration"%><%@page 
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import="java.sql.SQLException"%><%@page 
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import="org.ecoinformatics.datamanager.transpose.DataTranspose"%><%@page 
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import="au.com.bytecode.opencsv.CSVWriter"%><%@page 
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import="java.io.OutputStreamWriter"%><%@page 
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import="java.io.Writer"%><%@page 
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import="java.sql.ResultSet"%><%@page 
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import="edu.ucsb.nceas.metacat.dataquery.DataQuery"%><%@page 
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import="java.io.IOException"%><%@page 
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import="edu.ucsb.nceas.utilities.PropertyNotFoundException"%><%@page
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import="edu.ucsb.nceas.metacat.util.SystemUtil"%><%@page 
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import="java.util.Hashtable"%><%@ page 
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language="java" %><%
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/**
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 * 
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 * '$RCSfile$'
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 * Copyright: 2008 Regents of the University of California and the
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 *             National Center for Ecological Analysis and Synthesis
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 *    '$Author: leinfelder $'
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 *      '$Date: 2008-08-22 16:48:56 -0700 (Fri, 22 Aug 2008) $'
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 * '$Revision: 4305 $'
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 * 
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 * 
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */  
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%><%
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Hashtable params = getParams(request);
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handleDataquery(params,response,request.getSession().getId());
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%><%!
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	private Hashtable getParams(HttpServletRequest request) {
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		Hashtable params = new Hashtable();
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		Enumeration<String> paramlist = (Enumeration<String>)request.getParameterNames();
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		while (paramlist.hasMoreElements()) {
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			String name = paramlist.nextElement();
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			String[] value = request.getParameterValues(name);
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			params.put(name, value);
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		}
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		return params;
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	}
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%><%!
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	private List processResultsSet(ResultSet rs, int omitColumn, String omitColumnLabel) throws SQLException {
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		List retTable = new ArrayList();
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		int colCount = rs.getMetaData().getColumnCount();
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		List columnHeaders = new ArrayList();
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		int recordCount = 1;
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		OrderedMap uniqueIds = new OrderedMap();
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		while (rs.next()) {
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			List row = new ArrayList();
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			//get the values for this row
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			for (int i = 1; i <= colCount; i++) {
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				String colName = rs.getMetaData().getColumnName(i);
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				String value = rs.getString(i);
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				//clean up the value
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				value = cleanUp(value);
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				//hide the ids
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				if (i == omitColumn) {
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					String lookupValue = (String) uniqueIds.get(value);
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					if (lookupValue == null) {
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						lookupValue = recordCount + "";
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					}
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					uniqueIds.put(value, lookupValue);
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					value = lookupValue;
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					colName = omitColumnLabel;
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				}
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				if (recordCount == 1) {
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					columnHeaders.add(colName);
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				}
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				row.add(value);
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			}
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			retTable.add(row.toArray(new String[0]));
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			recordCount++;
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		}
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		retTable.add(0, columnHeaders.toArray(new String[0]));
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		return retTable;
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	}
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%><%!
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	private List transpose(ResultSet rs, int idCol, int pivotCol, List pivotAttributes, boolean omitIdValues) throws SQLException {
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		//map keyed by id column - data
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		OrderedMap table = new OrderedMap();
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		//track all the data columns
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		OrderedMap widestRow = new OrderedMap();
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		//map keyed by the pivot column - metadata
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		OrderedMap headerRows = new OrderedMap();
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		//vocab columns
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		String vocabNameCol = "qmetadatavocabulary";
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		String vocabValueCol = "qmetadatavalue";
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		//maps for the vocab lists
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		OrderedMap vocabNames = new OrderedMap();
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		OrderedMap vocabValues = new OrderedMap();
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		//all vocab names/values
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		List allVocabNames = new ArrayList();
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		List allVocabValues = new ArrayList();
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		boolean twoColumnMetadata = true;
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		int colCount = rs.getMetaData().getColumnCount();
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		String idColName = rs.getMetaData().getColumnName(idCol);
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		while (rs.next()) {
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			String id = rs.getString(idCol);
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			String pivotValue = rs.getString(pivotCol);
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			//look up the data row we are working on
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			OrderedMap row = (OrderedMap) table.get(id);
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			if (row == null) {
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				row = new OrderedMap();
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			}
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			//look up the metadata row we are working on
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			OrderedMap metadataRow = (OrderedMap) table.get(pivotValue);
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			if (metadataRow == null) {
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				metadataRow = new OrderedMap();
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			}
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			//get the values for this pivot
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			for (int i = 1; i <= colCount; i++) {
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				if (i != pivotCol) {
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					String colName = rs.getMetaData().getColumnName(i);
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					String value = rs.getString(i);
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					//clean up the value
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					value = cleanUp(value);
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					//do we include this column in the pivot?
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					if (pivotAttributes.contains(colName)) {
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						//annotate the column name with the pivot column value if not the id column
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						if (i != idCol) {
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							colName = pivotValue + "_" + colName;
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						}
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						row.put(colName, value);
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					}
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					else {
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						if (colName.startsWith(vocabNameCol) || colName.startsWith(vocabValueCol)) {
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							//don't add it to the normal metadata
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						}
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						else {
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							metadataRow.put(colName, value);
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						}
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					}
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					//names
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					if (colName.startsWith(vocabNameCol)) {
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						List list = (List) vocabNames.get(pivotValue);
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						if (list == null) {
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							list = new ArrayList();
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						}
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						list.add(value);
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						vocabNames.put(pivotValue, list);
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						allVocabNames.add(value);
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					}
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					//values
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					if (colName.startsWith(vocabValueCol)) {
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						List list = (List) vocabValues.get(pivotValue);
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						if (list == null) {
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							list = new ArrayList();
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						}
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						list.add(value);
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						vocabValues.put(pivotValue, list);
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						allVocabValues.add(value);
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					}
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				}
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			}
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			//track the data columns - the values are junk
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			widestRow.putAll(row);
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			//put the row back (or maybe it's the first time)
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			table.put(id, row);
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			//put the metadata header back
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			headerRows.put(pivotValue, metadataRow);
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		}
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		/** Construct the table structure for returning **/
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		//now make it into a list
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		List retTable = new ArrayList();
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		//map keyed by metadata labels
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		OrderedMap metadataHeaders = new OrderedMap();
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		//do the data header - drives the other columns - based on widest entry
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		List header = new ArrayList(widestRow.keySet());
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		//do the metadata header rows (basically rotate them around)
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		Iterator headerIter = header.iterator();
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		String lastValue = "";
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		while (headerIter.hasNext()) {
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			String column = (String) headerIter.next();
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			//get the pivotValue part of column name
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			String pivotValue = column;
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			try {
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				pivotValue = column.substring(0, column.indexOf("_"));
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			}
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			catch (Exception e) {}
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			//look up the row from the metadata - keyed by pivot value
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			OrderedMap metadataRow = (OrderedMap) headerRows.get(pivotValue);
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			if (metadataRow != null) {
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				//go through the values
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				Iterator metadataIter = metadataRow.keySet().iterator();
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				while (metadataIter.hasNext()) {
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					String key = (String) metadataIter.next();
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					String value = (String) metadataRow.get(key);
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					OrderedMap newMetadataRow = (OrderedMap) metadataHeaders.get(key);
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					if (newMetadataRow == null) {
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						newMetadataRow = new OrderedMap();
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					}
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					//if it's the same as the last one, just use null value
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					if (lastValue.equals(pivotValue)) {
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						value = null;
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					} 
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					newMetadataRow.put(column, value);
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					metadataHeaders.put(key, newMetadataRow);
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				}
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			}
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			lastValue = pivotValue;
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240
		}
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		//make metadata rows as list/arrays on the reteurn table
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		Iterator metadataLabelIter = metadataHeaders.keySet().iterator();
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		while (metadataLabelIter.hasNext()) {
245
			String label = (String) metadataLabelIter.next();
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			OrderedMap row = (OrderedMap) metadataHeaders.get(label);
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			List rowValues = new ArrayList(row.values());
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			rowValues.add(0, label);
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			if (twoColumnMetadata) {
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				//add extra column
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				rowValues.add(1, null);
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			}
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			retTable.add(rowValues.toArray(new String[0]));
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		}
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		//create the special vocab matrix rows
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		List vocabTable = new ArrayList();
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		List uniqueVocabs = new ArrayList();
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		for (int i = 0; i < allVocabNames.size(); i++) {
260
			List vocabRow = new ArrayList();
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			String vocabName = (String) allVocabNames.get(i);
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			String vocabValue = (String) allVocabValues.get(i);
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			String key = vocabName + "/" + vocabValue;
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			//check if we've processed this already, skip if so
265
			if (uniqueVocabs.contains(key)) {
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				continue;
267
			}
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			uniqueVocabs.add(key);			
269
			if (twoColumnMetadata) {
270
				vocabRow.add(vocabName);
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				vocabRow.add(vocabValue);
272
			}
273
			else {
274
				vocabRow.add(key);
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			}
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			//go through the questions now, again
277
			String lastPivotValue = "";
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			headerIter = header.iterator();
279
			while (headerIter.hasNext()) {
280
				String column = (String) headerIter.next();
281
				//get the pivotValue part of column name if it exists
282
				String pivotValue = null;
283
				try {
284
					pivotValue = column.substring(0, column.indexOf("_"));
285
				}
286
				catch (Exception e) {}
287
				if (pivotValue == null) {
288
					continue;
289
				}
290
				//check to not duplicate values
291
				if (pivotValue.equals(lastPivotValue)) {
292
					vocabRow.add(null);
293
				}
294
				else {
295
					//check to see if this question has that keyword
296
					List names = (List) vocabNames.get(pivotValue);
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					List values = (List) vocabValues.get(pivotValue);
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					if (names != null && names.indexOf(vocabName) > -1 && names.indexOf(vocabName) == values.indexOf(vocabValue) ) {
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						vocabRow.add("true");
300
					}
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					else {
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						vocabRow.add("false");
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					}
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				}
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				lastPivotValue = pivotValue;
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			}
307
			//put the row on
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			vocabTable.add(vocabRow.toArray(new String[0]));
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		}
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		//put the vocab matrix on the table
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		retTable.addAll(vocabTable);
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		if (twoColumnMetadata) {
315
			//add column to data header row
316
			header.add(1, null);
317
		}
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319
		//replace the "studentId" label
320
		int temp = header.indexOf("studentid");
321
		if (header.remove(temp) != null) {
322
			header.add(temp, "recordNum");
323
		}
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		//put the data header row on the table
326
		retTable.add(header.toArray(new String[0]));
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328
		//now the value rows in the table
329
		Iterator rowIter = table.values().iterator();
330
		int rowCount = 1;
331
		while (rowIter.hasNext()) {
332
			OrderedMap rowMap = (OrderedMap) rowIter.next();
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			List row = new ArrayList();
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			//iterate over the widest row's columns
335
			Iterator columnIter = widestRow.keySet().iterator();
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			while (columnIter.hasNext()) {
337
				Object key = columnIter.next();
338
				Object value = rowMap.get(key);
339
				//hide the value used for Ids - just increment row
340
				if (key.equals(idColName) && omitIdValues) {
341
					value = String.valueOf(rowCount);
342
				}
343
				row.add(value);
344
			}
345
			rowCount++;
346
			if (twoColumnMetadata) {
347
				//add extra column
348
				row.add(1, null);
349
			}
350
			retTable.add(row.toArray(new String[0]));
351
		}
352
		
353
		return retTable;
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	}
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%><%!
356
	private String cleanUp(String value) {
357
		if (value != null) {
358
			value = value.replaceAll("\n", " ");
359
			value = value.replaceAll("\\s+", " ");
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			value = value.replaceAll("<html>", " ");
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			value = value.replaceAll("</html>", " ");
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			value = value.replaceAll("<head>", " ");
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			value = value.replaceAll("</head>", " ");
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			value = value.replaceAll("<body>", " ");
365
			value = value.replaceAll("</body>", " ");
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			//translate any ecogrid urls
367
			value = convertEcogridURL(value);
368
		}
369
		return value;
370
	}
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%><%!
372
private String convertEcogridURL(String value) {
373
	if (value != null) {
374
		String prefix = "ecogrid://knb/";
375
		if (value.startsWith(prefix)) {
376
			//String docid = value.substring(prefix.length(), value.length());
377
			// TODO make URL
378
			String contextURL = "";
379
			try {
380
				contextURL = SystemUtil.getContextURL();
381
			}
382
			catch (PropertyNotFoundException pnfe) {
383
				//do nothing
384
			}
385
			value = value.replaceFirst(prefix, contextURL + "/metacat?action=read&docid=");
386
		}
387
	}
388
	return value;
389
}
390
%><%!
391
	private void handleDataquery(
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			Hashtable<String, String[]> params,
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	        HttpServletResponse response,
394
	        String sessionId) throws PropertyNotFoundException, IOException {
395
		
396
		DataQuery dq = null;
397
		if (sessionId != null) {
398
			dq = new DataQuery(sessionId);
399
		}
400
		else {
401
			dq = new DataQuery();
402
		}
403
		
404
		String dataqueryXML = (params.get("dataquery"))[0];
405
	
406
		ResultSet rs = null;
407
		try {
408
			rs = dq.executeQuery(dataqueryXML);
409
		} catch (Exception e) {
410
			//probably need to do something here
411
			e.printStackTrace();
412
			return;
413
		}
414
		
415
		//process the result set
416
		String qformat = "csv";
417
		String[] temp = params.get("qformat");
418
		if (temp != null && temp.length > 0) {
419
			qformat = temp[0];
420
		}
421
		String fileName = "query-results." + qformat;
422
		
423
		boolean transpose = false;
424
		temp = params.get("transpose");
425
		if (temp != null && temp.length > 0) {
426
			transpose = Boolean.parseBoolean(temp[0]);
427
		}
428
		int observation = 0;
429
		temp = params.get("observation");
430
		if (temp != null && temp.length > 0) {
431
			observation = Integer.parseInt(temp[0]);
432
		}
433
		int pivot = 0;
434
		temp = params.get("pivot");
435
		if (temp != null && temp.length > 0) {
436
			pivot = Integer.parseInt(temp[0]);
437
		}
438
		
439
		//get the results as csv file
440
		if (qformat != null && qformat.equalsIgnoreCase("csv")) {
441
			response.setContentType("text/csv");
442
			//response.setContentType("application/csv");
443
	        response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
444
	        
445
			Writer writer = new OutputStreamWriter(response.getOutputStream());
446
			//CSVWriter csv = new CSVWriter(writer, CSVWriter.DEFAULT_SEPARATOR, CSVWriter.NO_QUOTE_CHARACTER);
447
			CSVWriter csv = new CSVWriter(writer, CSVWriter.DEFAULT_SEPARATOR, CSVWriter.DEFAULT_QUOTE_CHARACTER, CSVWriter.DEFAULT_ESCAPE_CHARACTER);
448
			try {
449
				if (transpose) {
450
					List pivotCols = new ArrayList();
451
					pivotCols.add("studentid");
452
					pivotCols.add("score");
453
					pivotCols.add("response");
454
					List transposedTable = transpose(rs, observation, pivot, pivotCols, true);
455
					csv.writeAll(transposedTable);
456
				} else {
457
					List processedTable = processResultsSet(rs, 3, "recordNum");
458
					csv.writeAll(processedTable);
459
				}
460
				
461
				csv.flush();
462
				response.flushBuffer();
463
				
464
				rs.close();
465
				
466
			} catch (SQLException e) {
467
				e.printStackTrace();
468
			}
469
			
470
			return;
471
		}
472
		
473
	}
474
%>