| /* |
| * 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.tika.parser.mat; |
| |
| //JDK imports |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import com.jmatio.io.MatFileHeader; |
| import com.jmatio.io.MatFileReader; |
| import com.jmatio.types.MLArray; |
| import com.jmatio.types.MLStructure; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| |
| import org.apache.tika.exception.TikaException; |
| import org.apache.tika.io.TemporaryResources; |
| import org.apache.tika.io.TikaInputStream; |
| import org.apache.tika.metadata.Metadata; |
| import org.apache.tika.mime.MediaType; |
| import org.apache.tika.parser.AbstractParser; |
| import org.apache.tika.parser.ParseContext; |
| import org.apache.tika.sax.XHTMLContentHandler; |
| |
| //JMatIO imports |
| |
| |
| public class MatParser extends AbstractParser { |
| |
| public static final String MATLAB_MIME_TYPE = "application/x-matlab-data"; |
| |
| static { |
| //make sure that this is set to false |
| MatFileReader.setAllowObjectDeserialization(false); |
| } |
| |
| private final Set<MediaType> SUPPORTED_TYPES = |
| Collections.singleton(MediaType.application("x-matlab-data")); |
| |
| public Set<MediaType> getSupportedTypes(ParseContext context) { |
| return SUPPORTED_TYPES; |
| } |
| |
| public void parse(InputStream stream, ContentHandler handler, Metadata metadata, |
| ParseContext context) throws IOException, SAXException, TikaException { |
| |
| //Set MIME type as Matlab |
| metadata.set(Metadata.CONTENT_TYPE, MATLAB_MIME_TYPE); |
| TemporaryResources tmp = |
| TikaInputStream.isTikaInputStream(stream) ? null : new TemporaryResources(); |
| try { |
| // Use TIS so we can spool a temp file for parsing. |
| TikaInputStream tis = TikaInputStream.get(stream, tmp); |
| |
| //Extract information from header file |
| MatFileReader mfr = new MatFileReader(tis.getFile()); //input .mat file |
| |
| MatFileHeader hdr = mfr.getMatFileHeader(); //.mat header information |
| |
| // Example header: "MATLAB 5.0 MAT-file, Platform: MACI64, Created on: Sun Mar 2 |
| // 23:41:57 2014" |
| String[] parts = |
| hdr.getDescription().split(","); // Break header information into its parts |
| |
| if (parts[2].contains("Created")) { |
| int lastIndex1 = parts[2].lastIndexOf("Created on:"); |
| String dateCreated = parts[2].substring(lastIndex1 + "Created on:".length()).trim(); |
| metadata.set("createdOn", dateCreated); |
| } |
| |
| if (parts[1].contains("Platform")) { |
| int lastIndex2 = parts[1].lastIndexOf("Platform:"); |
| String platform = parts[1].substring(lastIndex2 + "Platform:".length()).trim(); |
| metadata.set("platform", platform); |
| } |
| |
| if (parts[0].contains("MATLAB")) { |
| metadata.set("fileType", parts[0]); |
| } |
| |
| // Get endian indicator from header file |
| String endianBytes = new String(hdr.getEndianIndicator(), |
| UTF_8); // Retrieve endian bytes and convert to string |
| String endianCode = String.valueOf( |
| endianBytes.toCharArray()); // Convert bytes to characters to string |
| metadata.set("endian", endianCode); |
| |
| //Text output |
| XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata); |
| xhtml.startDocument(); |
| xhtml.newline(); |
| //Loop through each variable |
| for (Map.Entry<String, MLArray> entry : mfr.getContent().entrySet()) { |
| String varName = entry.getKey(); |
| MLArray varData = entry.getValue(); |
| |
| xhtml.element("p", varName + ":" + String.valueOf(varData)); |
| |
| // If the variable is a structure, extract variable info from structure |
| if (varData.isStruct()) { |
| MLStructure mlStructure = (MLStructure) mfr.getMLArray(varName); |
| xhtml.startElement("ul"); |
| xhtml.newline(); |
| for (MLArray element : mlStructure.getAllFields()) { |
| xhtml.startElement("li"); |
| xhtml.characters(String.valueOf(element)); |
| |
| // If there is an embedded structure, extract variable info. |
| if (element.isStruct()) { |
| xhtml.startElement("ul"); |
| // Should this actually be a recursive call? |
| xhtml.element("li", element.contentToString()); |
| xhtml.endElement("ul"); |
| } |
| |
| xhtml.endElement("li"); |
| } |
| xhtml.endElement("ul"); |
| } |
| } |
| xhtml.endDocument(); |
| } catch (IOException e) { |
| throw new TikaException("Error parsing Matlab file with MatParser", e); |
| } finally { |
| if (tmp != null) { |
| tmp.dispose(); |
| } |
| } |
| } |
| } |