/*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.uima.caseditor.ui.wizards;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.StyledDocument;
import javax.swing.text.rtf.RTFEditorKit;
import org.apache.uima.UIMAFramework;
import org.apache.uima.cas.CAS;
import org.apache.uima.cas.impl.XCASSerializer;
import org.apache.uima.cas.impl.XmiCasSerializer;
import org.apache.uima.caseditor.core.TaeError;
import org.apache.uima.caseditor.editor.DocumentFormat;
import org.apache.uima.resource.ResourceInitializationException;
import org.apache.uima.resource.metadata.TypeSystemDescription;
import org.apache.uima.util.CasCreationUtils;
import org.apache.uima.util.InvalidXMLException;
import org.apache.uima.util.XMLInputSource;
import org.apache.uima.util.XMLParser;
import org.eclipse.ui.wizards.datatransfer.IImportStructureProvider;
import org.xml.sax.SAXException;
/**
*/
final class DocumentImportStructureProvider implements IImportStructureProvider {
/**
* Constructs a new DocumentImportStructureProvider object.
*
* @param containerFullPath
*/
public DocumentImportStructureProvider() {
}
public List<Object> getChildren(Object element) {
return null;
}
private static CAS createEmtpyCAS()
{
XMLInputSource xmlTypeSystemSource = new XMLInputSource(DocumentImportStructureProvider.class
.getResourceAsStream("ts.xml"), new File(""));
XMLParser xmlParser = UIMAFramework.getXMLParser();
TypeSystemDescription typeSystemDesciptor;
try {
typeSystemDesciptor = (TypeSystemDescription) xmlParser
.parse(xmlTypeSystemSource);
} catch (InvalidXMLException e1) {
throw new TaeError("Integrated ts.xml typesystem descriptor is not valid!");
}
try {
return CasCreationUtils.createCas(typeSystemDesciptor,
null, null);
} catch (ResourceInitializationException e) {
// should not happen
throw new TaeError("Unexpected exception!");
}
}
private InputStream getDocument(String text, DocumentFormat format) {
CAS cas = createEmtpyCAS();
cas.setDocumentText(text);
ByteArrayOutputStream out = new ByteArrayOutputStream(40000);
if (DocumentFormat.XCAS.equals(format)) {
try {
XCASSerializer.serialize(cas, out);
} catch (SAXException e) {
// should not happen
throw new TaeError("Unexpected exception!", e);
} catch (IOException e) {
// will not happen, writing to memory
throw new TaeError("Unexpected exception!", e);
}
}
else if (DocumentFormat.XMI.equals(format)) {
try {
XmiCasSerializer.serialize(cas, out);
} catch (SAXException e) {
// should not happen
throw new TaeError("Unexpected exception!", e);
}
}
else {
throw new TaeError("Unkown document type!", null);
}
return new ByteArrayInputStream(out.toByteArray());
}
public InputStream getContents(Object element) {
File fileToImport = (File) element;
String fileName = fileToImport.getName();
if (fileName.endsWith(".rtf")) {
InputStream in = null;
try {
in = new FileInputStream((File) element);
String text = convert(in);
return getDocument(text, DocumentFormat.XMI);
} catch (FileNotFoundException e) {
return null;
} catch (IOException e) {
return null;
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException e) {
// sorry that this can happen
}
}
} else if (fileName.endsWith(".txt")) {
InputStream in = null;
try {
in = new FileInputStream((File) element);
StringBuffer textStringBuffer = new StringBuffer();
byte[] readBuffer = new byte[2048];
while (in.available() > 0) {
int length = in.read(readBuffer);
// TODO: ask the user for the correct encoding
textStringBuffer.append(new String(readBuffer, 0, length)); //, "UTF-8"));
}
return getDocument(textStringBuffer.toString(), DocumentFormat.XMI);
} catch (FileNotFoundException e) {
return null;
} catch (IOException e) {
return null;
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
// sorry that this can fail
}
}
}
} else {
try {
return new FileInputStream((File) element);
} catch (FileNotFoundException e) {
return null;
}
}
}
private String convert(InputStream rtfDocumentInputStream) throws IOException {
RTFEditorKit aRtfEditorkit = new RTFEditorKit();
StyledDocument styledDoc = new DefaultStyledDocument();
String textDocument;
try {
aRtfEditorkit.read(rtfDocumentInputStream, styledDoc, 0);
textDocument = styledDoc.getText(0, styledDoc.getLength());
} catch (BadLocationException e) {
throw new IOException("Error during parsing");
}
return textDocument;
}
public String getFullPath(Object element) {
return "";
}
public String getLabel(Object element) {
File fileToImport = (File) element;
String fileName = fileToImport.getName();
if (fileName.endsWith(".rtf") || fileName.endsWith(".txt")) {
int nameWithouEndingLength = fileName.lastIndexOf(".");
String nameWithouEnding = fileName.substring(0, nameWithouEndingLength);
return nameWithouEnding + ".xmi";
} else {
return fileName;
}
}
public boolean isFolder(Object element) {
return ((File) element).isDirectory();
}
}