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Refactored importers, adding support for Excel files.

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git-svn-id: http://google-refine.googlecode.com/svn/trunk@47 7d457c2a-affb-35e4-300a-418c747d4874
This commit is contained in:
David Huynh 2010-02-05 19:19:38 +00:00
parent 3ea230b11c
commit 16dda46a61
10 changed files with 557 additions and 172 deletions
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9
pom.xml
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@ -62,7 +62,14 @@
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.1</version>
</dependency>
</dependency>
<!-- For reading XLS files -->
<dependency>
<groupId>poi</groupId>
<artifactId>poi</artifactId>
<version>2.5.1-final-20040804</version>
</dependency>
</dependencies>
</project>

4
src/main/java/com/metaweb/gridworks/GridworksServlet.java
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@ -16,7 +16,7 @@ import org.json.JSONTokener;
import com.metaweb.gridworks.commands.Command;
import com.metaweb.gridworks.commands.edit.AddColumnCommand;
import com.metaweb.gridworks.commands.edit.CreateProjectFromUploadCommand;
import com.metaweb.gridworks.commands.edit.CreateProjectCommand;
import com.metaweb.gridworks.commands.edit.DoTextTransformCommand;
import com.metaweb.gridworks.commands.edit.JoinMultiValueCellsCommand;
import com.metaweb.gridworks.commands.edit.RemoveColumnCommand;
@ -42,7 +42,7 @@ public class GridworksServlet extends HttpServlet {
static protected Map<String, Command> _commands = new HashMap<String, Command>();
static {
_commands.put("create-project-from-upload", new CreateProjectFromUploadCommand());
_commands.put("create-project-from-upload", new CreateProjectCommand());
_commands.put("export-rows", new ExportRowsCommand());
_commands.put("get-project-metadata", new GetProjectMetadataCommand());

6
src/main/java/com/metaweb/gridworks/ProjectManager.java
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@ -86,13 +86,9 @@ public class ProjectManager implements Serializable {
return _dir;
}
public Project createProject(ProjectMetadata projectMetadata) {
Project project = new Project();
public void registerProject(Project project, ProjectMetadata projectMetadata) {
_projects.put(project.id, project);
_projectsMetadata.put(project.id, projectMetadata);
return project;
}
public ProjectMetadata getProjectMetadata(long id) {

206
src/main/java/com/metaweb/gridworks/commands/edit/CreateProjectCommand.java Normal file
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@ -0,0 +1,206 @@
package com.metaweb.gridworks.commands.edit;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.Properties;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.metaweb.gridworks.ProjectManager;
import com.metaweb.gridworks.ProjectMetadata;
import com.metaweb.gridworks.commands.Command;
import com.metaweb.gridworks.importers.ExcelImporter;
import com.metaweb.gridworks.importers.Importer;
import com.metaweb.gridworks.importers.TsvCsvImporter;
import com.metaweb.gridworks.model.Project;
import com.metaweb.gridworks.util.ParsingUtilities;
import com.oreilly.servlet.multipart.FilePart;
import com.oreilly.servlet.multipart.MultipartParser;
import com.oreilly.servlet.multipart.ParamPart;
import com.oreilly.servlet.multipart.Part;
public class CreateProjectCommand extends Command {
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
Properties options = parseUrlParameters(request);
Project project = new Project();
internalImport(request, project, options);
ProjectMetadata pm = new ProjectMetadata();
pm.setName(options.getProperty("project-name"));
pm.setPassword(options.getProperty("project-password"));
ProjectManager.singleton.registerProject(project, pm);
project.columnModel.update();
redirect(response, "/project.html?project=" + project.id);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
protected Properties parseUrlParameters(HttpServletRequest request) {
Properties options = new Properties();
String query = request.getQueryString();
if (query != null) {
if (query.startsWith("?")) {
query = query.substring(1);
}
String[] pairs = query.split("&");
for (String pairString : pairs) {
int equal = pairString.indexOf('=');
String name = equal >= 0 ? pairString.substring(0, equal) : "";
String value = equal >= 0 ? ParsingUtilities.decode(pairString.substring(equal + 1)) : "";
options.put(name, value);
}
}
return options;
}
protected void internalImport(
HttpServletRequest request,
Project project,
Properties options
) throws Exception {
MultipartParser parser = null;
try {
parser = new MultipartParser(request, 20 * 1024 * 1024);
} catch (Exception e) {
// silent
}
if (parser != null) {
Part part = null;
while ((part = parser.readNextPart()) != null) {
if (part.isFile()) {
FilePart filePart = (FilePart) part;
Importer importer = guessImporter(
options, null, filePart.getFileName());
if (importer.takesReader()) {
Reader reader = new InputStreamReader(filePart.getInputStream());
try {
importer.read(reader, project, options);
} finally {
reader.close();
}
} else {
InputStream inputStream = filePart.getInputStream();
try {
importer.read(inputStream, project, options);
} finally {
inputStream.close();
}
}
} else if (part.isParam()) {
ParamPart paramPart = (ParamPart) part;
String paramName = paramPart.getName();
if (paramName.equals("raw-text")) {
StringReader reader = new StringReader(paramPart.getStringValue());
try {
new TsvCsvImporter().read(reader, project, options);
} finally {
reader.close();
}
} else if (paramName.equals("url")) {
String url = paramPart.getStringValue();
if (url.length() > 0) {
internalImportURL(request, project, options, url);
}
} else {
options.put(paramName, paramPart.getStringValue());
}
}
}
}
}
protected void internalImportURL(
HttpServletRequest request,
Project project,
Properties options,
String urlString
) throws Exception {
URL url = new URL(urlString);
URLConnection connection = null;
try {
connection = url.openConnection();
connection.setConnectTimeout(5000);
connection.connect();
} catch (Exception e) {
throw new Exception("Cannot connect to " + urlString, e);
}
InputStream inputStream = null;
try {
inputStream = connection.getInputStream();
} catch (Exception e) {
throw new Exception("Cannot retrieve content from " + url, e);
}
try {
Importer importer = guessImporter(
options,
connection.getContentType(),
url.getPath()
);
if (importer.takesReader()) {
String encoding = connection.getContentEncoding();
Reader reader = new InputStreamReader(
inputStream, (encoding == null) ? "ISO-8859-1" : encoding);
importer.read(reader, project, options);
} else {
importer.read(inputStream, project, options);
}
} finally {
inputStream.close();
}
}
protected Importer guessImporter(
Properties options, String contentType, String fileName) {
if (contentType != null) {
contentType = contentType.toLowerCase().trim();
if ("application/msexcel".equals(contentType) ||
"application/x-msexcel".equals(contentType) ||
"application/x-ms-excel".equals(contentType) ||
"application/vnd.ms-excel".equals(contentType) ||
"application/x-excel".equals(contentType) ||
"application/xls".equals(contentType) ||
"application/x-xls".equals(contentType)) {
return new ExcelImporter();
}
} else if (fileName != null) {
fileName = fileName.toLowerCase();
if (fileName.endsWith(".xls")) { // Note: we can't handle .xlsx yet
return new ExcelImporter();
}
}
return new TsvCsvImporter();
}
}

163
src/main/java/com/metaweb/gridworks/commands/edit/CreateProjectFromUploadCommand.java
View File

@ -1,163 +0,0 @@
package com.metaweb.gridworks.commands.edit;
import java.io.IOException;
import java.util.Properties;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.metaweb.gridworks.ProjectManager;
import com.metaweb.gridworks.ProjectMetadata;
import com.metaweb.gridworks.commands.Command;
import com.metaweb.gridworks.model.Cell;
import com.metaweb.gridworks.model.Column;
import com.metaweb.gridworks.model.Project;
import com.metaweb.gridworks.model.Row;
public class CreateProjectFromUploadCommand extends Command {
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Properties properties = new Properties();
String content = readFileUpload(request, properties);
ProjectMetadata pm = new ProjectMetadata();
pm.setName(properties.getProperty("project-name"));
pm.setPassword(properties.getProperty("project-password"));
Project project = ProjectManager.singleton.createProject(pm);
int start = 0;
String sep = null;
String line = null;
boolean first = true;
int cellCount = 1;
while (start < content.length()) {
int newline = content.indexOf('\n', start);
if (newline < 0) {
line = content.substring(start);
start = content.length();
} else {
line = content.substring(start, newline);
start = newline + 1;
}
if (sep == null) {
int tab = line.indexOf('\t');
if (tab >= 0) {
sep = "\t";
} else {
sep = ",";
}
}
if (first) {
String[] cells = line.split(sep);
first = false;
for (int c = 0; c < cells.length; c++) {
String cell = cells[c];
if (cell.startsWith("\"") && cell.endsWith("\"")) {
cell = cell.substring(1, cell.length() - 1);
}
Column column = new Column(c, cell);
project.columnModel.columns.add(column);
}
cellCount = cells.length;
} else {
Row row = new Row(cellCount);
if ((sep.charAt(0) == ',') ? parseCSVIntoRow(row, line) : parseTSVIntoRow(row, line)) {
project.rows.add(row);
project.columnModel.setMaxCellIndex(Math.max(project.columnModel.getMaxCellIndex(), row.cells.size()));
}
}
}
project.columnModel.update();
redirect(response, "/project.html?project=" + project.id);
}
static protected boolean parseTSVIntoRow(Row row, String line) {
boolean hasData = false;
String[] cells = line.split("\t");
for (int c = 0; c < cells.length; c++) {
String text = cells[c];
Cell cell = new Cell(parseCellValue(text), null);
row.cells.add(cell);
if (text.length() > 0) {
hasData = true;
}
}
return hasData;
}
static protected boolean parseCSVIntoRow(Row row, String line) {
boolean hasData = false;
int start = 0;
while (start < line.length()) {
String text = null;
if (line.charAt(start) == '"') {
int next = line.indexOf('"', start + 1);
if (next < 0) {
text = line.substring(start);
start = line.length();
} else {
text = line.substring(start, next + 1);
start = next + 2;
}
} else {
int next = line.indexOf(',', start);
if (next < 0) {
text = line.substring(start);
start = line.length();
} else {
text = line.substring(start, next);
start = next + 1;
}
}
Cell cell = new Cell(parseCellValue(text), null);
row.cells.add(cell);
if (text.length() > 0) {
hasData = true;
}
}
return hasData;
}
static public Object parseCellValue(String text) {
if (text.length() > 0) {
if (text.length() > 1 && text.startsWith("\"") && text.endsWith("\"")) {
return text.substring(1, text.length() - 1);
}
try {
return Long.parseLong(text);
} catch (NumberFormatException e) {
}
try {
return Double.parseDouble(text);
} catch (NumberFormatException e) {
}
}
return text;
}
}

150
src/main/java/com/metaweb/gridworks/importers/ExcelImporter.java Normal file
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@ -0,0 +1,150 @@
package com.metaweb.gridworks.importers;
import java.io.InputStream;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.apache.commons.lang.NotImplementedException;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import com.metaweb.gridworks.model.Cell;
import com.metaweb.gridworks.model.Column;
import com.metaweb.gridworks.model.Project;
import com.metaweb.gridworks.model.Row;
public class ExcelImporter implements Importer {
@Override
public boolean takesReader() {
return false;
}
@Override
public void read(Reader reader, Project project, Properties options)
throws Exception {
throw new NotImplementedException();
}
@Override
public void read(InputStream inputStream, Project project,
Properties options) throws Exception {
POIFSFileSystem fs = new POIFSFileSystem(inputStream);
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFSheet sheet = wb.getSheetAt(0);
int firstRow = sheet.getFirstRowNum();
int lastRow = sheet.getLastRowNum();
int r = firstRow;
List<Integer> nonBlankIndices = null;
List<String> nonBlankHeaderStrings = null;
/*
* Find the header row
*/
for (; r <= lastRow; r++) {
HSSFRow row = sheet.getRow(r);
if (row == null) {
continue;
}
short firstCell = row.getFirstCellNum();
short lastCell = row.getLastCellNum();
if (firstCell >= 0 && firstCell <= lastCell) {
nonBlankIndices = new ArrayList<Integer>(lastCell - firstCell + 1);
nonBlankHeaderStrings = new ArrayList<String>(lastCell - firstCell + 1);
for (short c = firstCell; c <= lastCell; c++) {
HSSFCell cell = row.getCell(c);
if (cell != null) {
String text = cell.getStringCellValue().trim();
if (text.length() > 0) {
nonBlankIndices.add((int) c);
nonBlankHeaderStrings.add(text);
}
}
}
if (nonBlankIndices.size() > 0) {
r++;
break;
}
}
}
if (nonBlankIndices == null || nonBlankIndices.size() == 0) {
return;
}
/*
* Create columns
*/
for (int c = 0; c < nonBlankIndices.size(); c++) {
Column column = new Column(c, nonBlankHeaderStrings.get(c));
project.columnModel.columns.add(column);
}
/*
* Now process the data rows
*/
for (; r <= lastRow; r++) {
HSSFRow row = sheet.getRow(r);
if (row == null) {
continue;
}
short firstCell = row.getFirstCellNum();
short lastCell = row.getLastCellNum();
if (firstCell >= 0 && firstCell <= lastCell) {
Row newRow = new Row(nonBlankIndices.size());
boolean hasData = false;
for (short c = 0; c < nonBlankIndices.size(); c++) {
if (c < firstCell || c > lastCell) {
continue;
}
HSSFCell cell = row.getCell(c);
if (cell == null) {
continue;
}
int cellType = cell.getCellType();
if (cellType == HSSFCell.CELL_TYPE_ERROR ||
cellType == HSSFCell.CELL_TYPE_BLANK) {
continue;
}
Object value = null;
if (cellType == HSSFCell.CELL_TYPE_BOOLEAN) {
value = cell.getBooleanCellValue();
} else if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
value = cell.getNumericCellValue();
} else {
String text = cell.getStringCellValue().trim();
if (text.length() > 0) {
value = text;
}
}
if (value != null) {
newRow.setCell(c, new Cell(value, null));
hasData = true;
}
}
if (hasData) {
project.rows.add(newRow);
}
}
}
}
}

14
src/main/java/com/metaweb/gridworks/importers/Importer.java Normal file
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@ -0,0 +1,14 @@
package com.metaweb.gridworks.importers;
import java.io.InputStream;
import java.io.Reader;
import java.util.Properties;
import com.metaweb.gridworks.model.Project;
public interface Importer {
public boolean takesReader();
public void read(Reader reader, Project project, Properties options) throws Exception;
public void read(InputStream inputStream, Project project, Properties options) throws Exception;
}

84
src/main/java/com/metaweb/gridworks/importers/ImporterUtilities.java Normal file
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@ -0,0 +1,84 @@
package com.metaweb.gridworks.importers;
import com.metaweb.gridworks.model.Cell;
import com.metaweb.gridworks.model.Row;
public class ImporterUtilities {
static public Object parseCellValue(String text) {
if (text.length() > 0) {
if (text.length() > 1 && text.startsWith("\"") && text.endsWith("\"")) {
return text.substring(1, text.length() - 1);
}
try {
return Long.parseLong(text);
} catch (NumberFormatException e) {
}
try {
return Double.parseDouble(text);
} catch (NumberFormatException e) {
}
}
return text;
}
static public boolean parseCSVIntoRow(Row row, String line) {
boolean hasData = false;
int start = 0;
while (start < line.length()) {
String text = null;
if (line.charAt(start) == '"') {
int next = line.indexOf('"', start + 1);
if (next < 0) {
text = line.substring(start);
start = line.length();
} else {
text = line.substring(start, next + 1);
start = next + 2;
}
} else {
int next = line.indexOf(',', start);
if (next < 0) {
text = line.substring(start);
start = line.length();
} else {
text = line.substring(start, next);
start = next + 1;
}
}
Cell cell = new Cell(parseCellValue(text), null);
row.cells.add(cell);
if (text.length() > 0) {
hasData = true;
}
}
return hasData;
}
static public boolean parseTSVIntoRow(Row row, String line) {
boolean hasData = false;
String[] cells = line.split("\t");
for (int c = 0; c < cells.length; c++) {
String text = cells[c];
Cell cell = new Cell(parseCellValue(text), null);
row.cells.add(cell);
if (text.length() > 0) {
hasData = true;
}
}
return hasData;
}
}

82
src/main/java/com/metaweb/gridworks/importers/TsvCsvImporter.java Normal file
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@ -0,0 +1,82 @@
package com.metaweb.gridworks.importers;
import java.io.InputStream;
import java.io.LineNumberReader;
import java.io.Reader;
import java.util.Properties;
import org.apache.commons.lang.NotImplementedException;
import com.metaweb.gridworks.model.Column;
import com.metaweb.gridworks.model.Project;
import com.metaweb.gridworks.model.Row;
public class TsvCsvImporter implements Importer {
@Override
public void read(Reader reader, Project project, Properties options)
throws Exception {
LineNumberReader lnReader = new LineNumberReader(reader);
try {
String sep = null; // auto-detect TSV or CSV
String line = null;
boolean first = true;
int cellCount = 1;
while ((line = lnReader.readLine()) != null) {
if (line.trim().isEmpty()) {
continue;
}
if (sep == null) {
int tab = line.indexOf('\t');
if (tab >= 0) {
sep = "\t";
} else {
sep = ",";
}
}
if (first) {
String[] cells = line.split(sep);
first = false;
for (int c = 0; c < cells.length; c++) {
String cell = cells[c];
if (cell.startsWith("\"") && cell.endsWith("\"")) {
cell = cell.substring(1, cell.length() - 1);
}
Column column = new Column(c, cell);
project.columnModel.columns.add(column);
}
cellCount = cells.length;
} else {
Row row = new Row(cellCount);
if ((sep.charAt(0) == ',') ? ImporterUtilities.parseCSVIntoRow(row, line) : ImporterUtilities.parseTSVIntoRow(row, line)) {
project.rows.add(row);
project.columnModel.setMaxCellIndex(Math.max(project.columnModel.getMaxCellIndex(), row.cells.size()));
}
}
}
} finally {
lnReader.close();
}
}
@Override
public void read(InputStream inputStream, Project project,
Properties options) throws Exception {
throw new NotImplementedException();
}
@Override
public boolean takesReader() {
return true;
}
}

11
src/main/java/com/metaweb/gridworks/util/ParsingUtilities.java
View File

@ -6,6 +6,7 @@ import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.net.URLCodec;
import org.json.JSONArray;
import org.json.JSONException;
@ -55,5 +56,13 @@ public class ParsingUtilities {
return s; // should not happen
}
}
static public String decode(String s) {
try {
return codec.decode(s, "UTF-8");
} catch (UnsupportedEncodingException e) {
return s; // should not happen
} catch (DecoderException e) {
return s; // should not happen
}
}
}