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HeaderParser.java
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HeaderParser.java
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package org.grobid.core.engines;
import com.google.common.base.Splitter;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.grobid.core.GrobidModels;
import org.grobid.core.data.BiblioItem;
import org.grobid.core.data.Date;
import org.grobid.core.data.Affiliation;
import org.grobid.core.data.Keyword;
import org.grobid.core.data.Person;
import org.grobid.core.document.Document;
import org.grobid.core.document.DocumentPiece;
import org.grobid.core.document.DocumentPointer;
import org.grobid.core.document.DocumentSource;
import org.grobid.core.document.TEIFormatter;
import org.grobid.core.engines.config.GrobidAnalysisConfig;
import org.grobid.core.engines.label.SegmentationLabels;
import org.grobid.core.engines.label.TaggingLabel;
import org.grobid.core.engines.label.TaggingLabels;
import org.grobid.core.exceptions.GrobidException;
import org.grobid.core.exceptions.GrobidExceptionStatus;
import org.grobid.core.features.FeatureFactory;
import org.grobid.core.features.FeaturesVectorHeader;
import org.grobid.core.lang.Language;
import org.grobid.core.lexicon.Lexicon;
import org.grobid.core.layout.Block;
import org.grobid.core.layout.BoundingBox;
import org.grobid.core.layout.LayoutToken;
import org.grobid.core.layout.PDFAnnotation;
import org.grobid.core.tokenization.LabeledTokensContainer;
import org.grobid.core.tokenization.TaggingTokenCluster;
import org.grobid.core.tokenization.TaggingTokenClusteror;
import org.grobid.core.utilities.Consolidation;
import org.grobid.core.utilities.GrobidProperties;
import org.grobid.core.utilities.LanguageUtilities;
import org.grobid.core.utilities.OffsetPosition;
import org.grobid.core.utilities.LayoutTokensUtil;
import org.grobid.core.utilities.TextUtilities;
import org.grobid.core.utilities.counters.CntManager;
import org.grobid.core.GrobidModels.Collection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.SortedSet;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Patrice Lopez
*/
public class HeaderParser extends AbstractParser {
private static final Logger LOGGER = LoggerFactory.getLogger(HeaderParser.class);
private LanguageUtilities languageUtilities = LanguageUtilities.getInstance();
private EngineParsers parsers;
// default bins for relative position
private static final int NBBINS_POSITION = 12;
// default bins for inter-block spacing
private static final int NBBINS_SPACE = 5;
// default bins for block character density
private static final int NBBINS_DENSITY = 5;
// projection scale for line length
private static final int LINESCALE = 10;
private Lexicon lexicon = Lexicon.getInstance();
public HeaderParser(EngineParsers parsers, CntManager cntManager) {
super(GrobidModels.HEADER, cntManager);
this.parsers = parsers;
GrobidProperties.getInstance();
}
public HeaderParser(EngineParsers parsers) {
super(GrobidModels.HEADER);
this.parsers = parsers;
GrobidProperties.getInstance();
}
/**
* Processing with application of the segmentation model
*/
public Pair<String, Document> processing(File input, BiblioItem resHeader, GrobidAnalysisConfig config) {
DocumentSource documentSource = null;
try {
documentSource = DocumentSource.fromPdf(input, config.getStartPage(), config.getEndPage());
Document doc = parsers.getSegmentationParser().processing(documentSource, config);
String tei = processingHeaderSection(config, doc, resHeader, false);
return new ImmutablePair<String, Document>(tei, doc);
} finally {
if (documentSource != null) {
documentSource.close(true, true, true);
}
}
}
/**
* Processing without application of the segmentation model, regex are used to identify the header
* zone.
*/
public Pair<String, Document> processing2(String pdfInput, BiblioItem resHeader, GrobidAnalysisConfig config) {
DocumentSource documentSource = null;
try {
documentSource = DocumentSource.fromPdf(new File(pdfInput), config.getStartPage(), config.getEndPage());
Document doc = new Document(documentSource);
doc.addTokenizedDocument(config);
if (doc.getBlocks() == null) {
throw new GrobidException("PDF parsing resulted in empty content");
}
//String tei = processingHeaderBlock(config, doc, resHeader);
String tei = processingHeaderSection(config, doc, resHeader, true);
return Pair.of(tei, doc);
} catch (Exception e) {
throw new GrobidException(e, GrobidExceptionStatus.GENERAL);
} finally {
if (documentSource != null) {
documentSource.close(true, true, true);
}
}
}
/**
* Header processing after application of the segmentation model (new approach)
*/
public String processingHeaderSection(GrobidAnalysisConfig config, Document doc, BiblioItem resHeader, boolean applyHeuristics) {
try {
SortedSet<DocumentPiece> documentHeaderParts = null;
if (applyHeuristics)
documentHeaderParts = doc.getDocumentPartsWithHeuristics();
else
documentHeaderParts = doc.getDocumentPart(SegmentationLabels.HEADER);
List<LayoutToken> tokenizations = doc.getTokenizations();
if (documentHeaderParts != null) {
List<LayoutToken> tokenizationsHeader = new ArrayList<LayoutToken>();
for (DocumentPiece docPiece : documentHeaderParts) {
DocumentPointer dp1 = docPiece.getLeft();
DocumentPointer dp2 = docPiece.getRight();
int tokens = dp1.getTokenDocPos();
int tokene = dp2.getTokenDocPos();
for (int i = tokens; i < tokene; i++) {
tokenizationsHeader.add(tokenizations.get(i));
}
}
//String header = getSectionHeaderFeatured(doc, documentHeaderParts, true);
Pair<String, List<LayoutToken>> featuredHeader = getSectionHeaderFeatured(doc, documentHeaderParts);
String header = featuredHeader.getLeft();
List<LayoutToken> headerTokenization = featuredHeader.getRight();
String res = null;
if ((header != null) && (header.trim().length() > 0)) {
res = label(header);
resHeader = resultExtraction(res, headerTokenization, resHeader, doc);
}
// language identification
StringBuilder contentSample = new StringBuilder();
if (resHeader.getTitle() != null) {
contentSample.append(resHeader.getTitle());
}
if (resHeader.getAbstract() != null) {
contentSample.append("\n");
contentSample.append(resHeader.getAbstract());
}
if (contentSample.length() < 200) {
// we can exploit more textual content to ensure that the language identification will be
// correct
SortedSet<DocumentPiece> documentBodyParts = doc.getDocumentPart(SegmentationLabels.BODY);
if (documentBodyParts != null) {
StringBuilder contentBuffer = new StringBuilder();
for (DocumentPiece docPiece : documentBodyParts) {
DocumentPointer dp1 = docPiece.getLeft();
DocumentPointer dp2 = docPiece.getRight();
int tokens = dp1.getTokenDocPos();
int tokene = dp2.getTokenDocPos();
for (int i = tokens; i < tokene; i++) {
contentBuffer.append(tokenizations.get(i));
contentBuffer.append(" ");
}
}
contentSample.append(" ");
contentSample.append(contentBuffer.toString());
}
}
Language langu = languageUtilities.runLanguageId(contentSample.toString());
if (langu != null) {
String lang = langu.getLang();
doc.setLanguage(lang);
resHeader.setLanguage(lang);
}
if (resHeader != null) {
if (resHeader.getAbstract() != null) {
resHeader.setAbstract(TextUtilities.dehyphenizeHard(resHeader.getAbstract()));
//resHeader.setAbstract(TextUtilities.dehyphenize(resHeader.getAbstract()));
}
BiblioItem.cleanTitles(resHeader);
if (resHeader.getTitle() != null) {
// String temp =
// utilities.dehyphenizeHard(resHeader.getTitle());
String temp = TextUtilities.dehyphenize(resHeader.getTitle());
temp = temp.trim();
if (temp.length() > 1) {
if (temp.startsWith("1"))
temp = temp.substring(1, temp.length());
temp = temp.trim();
}
resHeader.setTitle(temp);
}
if (resHeader.getBookTitle() != null) {
resHeader.setBookTitle(TextUtilities.dehyphenize(resHeader.getBookTitle()));
}
resHeader.setOriginalAuthors(resHeader.getAuthors());
resHeader.getAuthorsTokens();
boolean fragmentedAuthors = false;
boolean hasMarker = false;
List<Integer> authorsBlocks = new ArrayList<Integer>();
List<List<LayoutToken>> authorSegments = new ArrayList<>();
if (resHeader.getAuthorsTokens() != null) {
// split the list of layout tokens when token "\t" is met
List<LayoutToken> currentSegment = new ArrayList<>();
for(LayoutToken theToken : resHeader.getAuthorsTokens()) {
if (theToken.getText() != null && theToken.getText().equals("\t")) {
if (currentSegment.size() > 0)
authorSegments.add(currentSegment);
currentSegment = new ArrayList<>();
} else
currentSegment.add(theToken);
}
// last segment
if (currentSegment.size() > 0)
authorSegments.add(currentSegment);
if (authorSegments.size() > 1) {
fragmentedAuthors = true;
}
for (int k = 0; k < authorSegments.size(); k++) {
if (authorSegments.get(k).size() == 0)
continue;
List<Person> localAuthors = parsers.getAuthorParser()
.processingHeaderWithLayoutTokens(authorSegments.get(k), doc.getPDFAnnotations());
if (localAuthors != null) {
for (Person pers : localAuthors) {
resHeader.addFullAuthor(pers);
if (pers.getMarkers() != null) {
hasMarker = true;
}
authorsBlocks.add(k);
}
}
}
}
// remove invalid authors (no last name, noise, etc.)
resHeader.setFullAuthors(Person.sanityCheck(resHeader.getFullAuthors()));
resHeader.setFullAffiliations(
parsers.getAffiliationAddressParser().processReflow(res, tokenizations));
resHeader.attachEmails();
boolean attached = false;
if (fragmentedAuthors && !hasMarker) {
if (resHeader.getFullAffiliations() != null) {
if (authorSegments != null) {
if (resHeader.getFullAffiliations().size() == authorSegments.size()) {
int k = 0;
List<Person> persons = resHeader.getFullAuthors();
for (Person pers : persons) {
if (k < authorsBlocks.size()) {
int indd = authorsBlocks.get(k);
if (indd < resHeader.getFullAffiliations().size()) {
pers.addAffiliation(resHeader.getFullAffiliations().get(indd));
}
}
k++;
}
attached = true;
resHeader.setFullAffiliations(null);
resHeader.setAffiliation(null);
}
}
}
}
if (!attached) {
resHeader.attachAffiliations();
}
// remove duplicated authors
resHeader.setFullAuthors(Person.deduplicate(resHeader.getFullAuthors()));
if (resHeader.getEditors() != null) {
// TBD: consider segments also for editors, like for authors above
resHeader.setFullEditors(parsers.getAuthorParser().processingHeader(resHeader.getEditors()));
}
// below using the reference strings to improve the metadata extraction, it will have to
// be reviewed for something safer as just a straightforward correction
/*if (resHeader.getReference() != null) {
BiblioItem refer = parsers.getCitationParser().processing(resHeader.getReference(), 0);
BiblioItem.correct(resHeader, refer);
}*/
}
// keyword post-processing
if (resHeader.getKeyword() != null) {
String keywords = TextUtilities.dehyphenize(resHeader.getKeyword());
keywords = BiblioItem.cleanKeywords(keywords);
resHeader.setKeyword(keywords.replace("\n", " ").replace(" ", " "));
List<Keyword> keywordsSegmented = BiblioItem.segmentKeywords(keywords);
if ((keywordsSegmented != null) && (keywordsSegmented.size() > 0))
resHeader.setKeywords(keywordsSegmented);
}
// DOI pass
List<String> dois = doc.getDOIMatches();
if (dois != null) {
if ((dois.size() == 1) && (resHeader != null)) {
resHeader.setDOI(dois.get(0));
}
}
resHeader = consolidateHeader(resHeader, config.getConsolidateHeader());
// normalization of dates
if (resHeader != null) {
if (resHeader.getPublicationDate() != null) {
List<Date> dates = parsers.getDateParser().processing(resHeader.getPublicationDate());
// most basic heuristic, we take the first date - to be
// revised...
if (dates != null) {
if (dates.size() > 0) {
resHeader.setNormalizedPublicationDate(dates.get(0));
}
}
}
if (resHeader.getSubmissionDate() != null) {
List<Date> dates = parsers.getDateParser().processing(resHeader.getSubmissionDate());
if (dates != null) {
if (dates.size() > 0) {
resHeader.setNormalizedSubmissionDate(dates.get(0));
}
}
}
if (resHeader.getDownloadDate() != null) {
List<Date> dates = parsers.getDateParser().processing(resHeader.getDownloadDate());
if (dates != null) {
if (dates.size() > 0) {
resHeader.setNormalizedDownloadDate(dates.get(0));
}
}
}
if (resHeader.getServerDate() != null) {
List<Date> dates = parsers.getDateParser().processing(resHeader.getServerDate());
if (dates != null) {
if (dates.size() > 0) {
resHeader.setNormalizedServerDate(dates.get(0));
}
}
}
}
TEIFormatter teiFormatter = new TEIFormatter(doc, null);
StringBuilder tei = teiFormatter.toTEIHeader(resHeader, null, null, config);
tei.append("\t</text>\n");
tei.append("</TEI>\n");
return tei.toString();
}
} catch (Exception e) {
throw new GrobidException("An exception occurred while running Grobid.", e);
}
return null;
}
/**
* Return the header section with features to be processed by the sequence labelling model
*/
public Pair<String, List<LayoutToken>> getSectionHeaderFeatured(Document doc,
SortedSet<DocumentPiece> documentHeaderParts) {
FeatureFactory featureFactory = FeatureFactory.getInstance();
StringBuilder header = new StringBuilder();
String currentFont = null;
int currentFontSize = -1;
// vector for features
FeaturesVectorHeader features;
FeaturesVectorHeader previousFeatures = null;
double lineStartX = Double.NaN;
boolean indented = false;
boolean centered = false;
boolean endblock;
//for (Integer blocknum : blockDocumentHeaders) {
List<Block> blocks = doc.getBlocks();
if ((blocks == null) || blocks.size() == 0) {
return null;
}
List<LayoutToken> headerTokenizations = new ArrayList<LayoutToken>();
// find the largest, smallest and average size font on the header section
double largestFontSize = 0.0;
double smallestFontSize = 100000.0;
double averageFontSize;
double accumulatedFontSize = 0.0;
int nbTokens = 0;
for (DocumentPiece docPiece : documentHeaderParts) {
DocumentPointer dp1 = docPiece.getLeft();
DocumentPointer dp2 = docPiece.getRight();
for (int blockIndex = dp1.getBlockPtr(); blockIndex <= dp2.getBlockPtr(); blockIndex++) {
Block block = blocks.get(blockIndex);
List<LayoutToken> tokens = block.getTokens();
if ((tokens == null) || (tokens.size() == 0)) {
continue;
}
for(LayoutToken token : tokens) {
if (token.getFontSize() > largestFontSize) {
largestFontSize = token.getFontSize();
}
if (token.getFontSize() < smallestFontSize) {
smallestFontSize = token.getFontSize();
}
accumulatedFontSize += token.getFontSize();
nbTokens++;
}
}
}
averageFontSize = accumulatedFontSize / nbTokens;
// TBD: this would need to be made more efficient, by applying the regex only to a limited
// part of the tokens
/*List<LayoutToken> tokenizations = doc.getTokenizations();
List<OffsetPosition> locationPositions = lexicon.tokenPositionsLocationNames(tokenizations);
List<OffsetPosition> urlPositions = lexicon.tokenPositionsUrlPattern(tokenizations);
List<OffsetPosition> emailPositions = lexicon.tokenPositionsEmailPattern(tokenizations);*/
for (DocumentPiece docPiece : documentHeaderParts) {
DocumentPointer dp1 = docPiece.getLeft();
DocumentPointer dp2 = docPiece.getRight();
for (int blockIndex = dp1.getBlockPtr(); blockIndex <= dp2.getBlockPtr(); blockIndex++) {
Block block = blocks.get(blockIndex);
boolean newline = false;
boolean previousNewline = true;
endblock = false;
double spacingPreviousBlock = 0.0; // discretized
if (previousFeatures != null)
previousFeatures.blockStatus = "BLOCKEND";
List<LayoutToken> tokens = block.getTokens();
if ((tokens == null) || (tokens.size() == 0)) {
continue;
}
String localText = block.getText();
if (localText == null)
continue;
int startIndex = 0;
int n = 0;
if (blockIndex == dp1.getBlockPtr()) {
//n = block.getStartToken();
n = dp1.getTokenDocPos() - block.getStartToken();
startIndex = dp1.getTokenDocPos() - block.getStartToken();
}
// character density of the block
double density = 0.0;
if ( (block.getHeight() != 0.0) && (block.getWidth() != 0.0) &&
(block.getText() != null) && (!block.getText().contains("@PAGE")) &&
(!block.getText().contains("@IMAGE")) )
density = (double)block.getText().length() / (block.getHeight() * block.getWidth());
String[] lines = localText.split("[\\n\\r]");
// set the max length of the lines in the block, in number of characters
int maxLineLength = 0;
for(int p=0; p<lines.length; p++) {
if (lines[p].length() > maxLineLength)
maxLineLength = lines[p].length();
}
/*for (int li = 0; li < lines.length; li++) {
String line = lines[li];
features.lineLength = featureFactory
.linearScaling(line.length(), maxLineLength, LINESCALE);
features.punctuationProfile = TextUtilities.punctuationProfile(line);
}*/
List<OffsetPosition> locationPositions = lexicon.tokenPositionsLocationNames(tokens);
List<OffsetPosition> emailPositions = lexicon.tokenPositionsEmailPattern(tokens);
List<OffsetPosition> urlPositions = lexicon.tokenPositionsUrlPattern(tokens);
/*for (OffsetPosition position : emailPositions) {
System.out.println(position.start + " " + position.end + " / " + tokens.get(position.start) + " ... " + tokens.get(position.end));
}*/
while (n < tokens.size()) {
if (blockIndex == dp2.getBlockPtr()) {
if (n > dp2.getTokenDocPos() - block.getStartToken()) {
break;
}
}
LayoutToken token = tokens.get(n);
headerTokenizations.add(token);
String text = token.getText();
if (text == null) {
n++;
continue;
}
text = text.replace(" ", "");
if (text.length() == 0) {
n++;
continue;
}
if (text.equals("\n") || text.equals("\r")) {
previousNewline = true;
newline = false;
n++;
continue;
}
if (previousNewline) {
newline = true;
previousNewline = false;
if (token != null && previousFeatures != null) {
double previousLineStartX = lineStartX;
lineStartX = token.getX();
double characterWidth = token.width / token.getText().length();
if (!Double.isNaN(previousLineStartX)) {
// Indentation if line start is > 1 character width to the right of previous line start
if (lineStartX - previousLineStartX > characterWidth)
indented = true;
// Indentation ends if line start is > 1 character width to the left of previous line start
else if (previousLineStartX - lineStartX > characterWidth)
indented = false;
// Otherwise indentation is unchanged
}
}
} else{
newline = false;
}
// centered ?
// final sanitisation and filtering for the token
text = text.replaceAll("[ \n]", "");
if (TextUtilities.filterLine(text)) {
n++;
continue;
}
features = new FeaturesVectorHeader();
features.token = token;
features.string = text;
if (newline)
features.lineStatus = "LINESTART";
Matcher m0 = featureFactory.isPunct.matcher(text);
if (m0.find()) {
features.punctType = "PUNCT";
}
if (text.equals("(") || text.equals("[")) {
features.punctType = "OPENBRACKET";
} else if (text.equals(")") || text.equals("]")) {
features.punctType = "ENDBRACKET";
} else if (text.equals(".")) {
features.punctType = "DOT";
} else if (text.equals(",")) {
features.punctType = "COMMA";
} else if (text.equals("-")) {
features.punctType = "HYPHEN";
} else if (text.equals("\"") || text.equals("\'") || text.equals("`")) {
features.punctType = "QUOTE";
}
if (n == startIndex) {
// beginning of block
features.lineStatus = "LINESTART";
features.blockStatus = "BLOCKSTART";
} else if ((n == tokens.size() - 1) || (n+1 > dp2.getTokenDocPos() - block.getStartToken())) {
// end of block
features.lineStatus = "LINEEND";
previousNewline = true;
features.blockStatus = "BLOCKEND";
endblock = true;
} else {
// look ahead to see if we are at the end of a line within the block
boolean endline = false;
int ii = 1;
boolean endloop = false;
while ((n + ii < tokens.size()) && (!endloop)) {
LayoutToken tok = tokens.get(n + ii);
if (tok != null) {
String toto = tok.getText();
if (toto != null) {
if (toto.equals("\n") || text.equals("\r")) {
endline = true;
endloop = true;
} else {
if ((toto.trim().length() != 0)
&& (!text.equals("\u00A0"))
&& (!(toto.contains("@IMAGE")))
&& (!(toto.contains("@PAGE")))
&& (!text.contains(".pbm"))
&& (!text.contains(".ppm"))
&& (!text.contains(".png"))
&& (!text.contains(".svg"))
&& (!text.contains(".jpg"))) {
endloop = true;
}
}
}
}
if (n + ii == tokens.size() - 1) {
endblock = true;
endline = true;
}
ii++;
}
if ((!endline) && !(newline)) {
features.lineStatus = "LINEIN";
} else if (!newline) {
features.lineStatus = "LINEEND";
previousNewline = true;
}
if ((!endblock) && (features.blockStatus == null))
features.blockStatus = "BLOCKIN";
else if (features.blockStatus == null)
features.blockStatus = "BLOCKEND";
}
if (indented) {
features.alignmentStatus = "LINEINDENT";
}
else {
features.alignmentStatus = "ALIGNEDLEFT";
}
if (text.length() == 1) {
features.singleChar = true;
}
if (Character.isUpperCase(text.charAt(0))) {
features.capitalisation = "INITCAP";
}
if (featureFactory.test_all_capital(text)) {
features.capitalisation = "ALLCAP";
}
if (featureFactory.test_digit(text)) {
features.digit = "CONTAINSDIGITS";
}
Matcher m = featureFactory.isDigit.matcher(text);
if (m.find()) {
features.digit = "ALLDIGIT";
}
if (featureFactory.test_common(text)) {
features.commonName = true;
}
if (featureFactory.test_names(text)) {
features.properName = true;
}
if (featureFactory.test_month(text)) {
features.month = true;
}
Matcher m2 = featureFactory.year.matcher(text);
if (m2.find()) {
features.year = true;
}
// check token offsets for email and http address, or known location
if (locationPositions != null) {
for(OffsetPosition thePosition : locationPositions) {
if (n >= thePosition.start && n <= thePosition.end) {
features.locationName = true;
break;
}
}
}
if (emailPositions != null) {
for(OffsetPosition thePosition : emailPositions) {
if (n >= thePosition.start && n <= thePosition.end) {
features.email = true;
break;
}
}
}
if (urlPositions != null) {
for(OffsetPosition thePosition : urlPositions) {
if (n >= thePosition.start && n <= thePosition.end) {
features.http = true;
break;
}
}
}
if (currentFont == null) {
currentFont = token.getFont();
features.fontStatus = "NEWFONT";
} else if (!currentFont.equals(token.getFont())) {
currentFont = token.getFont();
features.fontStatus = "NEWFONT";
} else
features.fontStatus = "SAMEFONT";
int newFontSize = (int) token.getFontSize();
if (currentFontSize == -1) {
currentFontSize = newFontSize;
features.fontSize = "HIGHERFONT";
} else if (currentFontSize == newFontSize) {
features.fontSize = "SAMEFONTSIZE";
} else if (currentFontSize < newFontSize) {
features.fontSize = "HIGHERFONT";
currentFontSize = newFontSize;
} else if (currentFontSize > newFontSize) {
features.fontSize = "LOWERFONT";
currentFontSize = newFontSize;
}
if (token.getFontSize() == largestFontSize)
features.largestFont = true;
if (token.getFontSize() == smallestFontSize)
features.smallestFont = true;
if (token.getFontSize() > averageFontSize)
features.largerThanAverageFont = true;
if (token.getBold())
features.bold = true;
if (token.getItalic())
features.italic = true;
if (features.capitalisation == null)
features.capitalisation = "NOCAPS";
if (features.digit == null)
features.digit = "NODIGIT";
if (features.punctType == null)
features.punctType = "NOPUNCT";
/*if (spacingPreviousBlock != 0.0) {
features.spacingWithPreviousBlock = featureFactory
.linearScaling(spacingPreviousBlock-doc.getMinBlockSpacing(), doc.getMaxBlockSpacing()-doc.getMinBlockSpacing(), NBBINS_SPACE);
}*/
if (density != -1.0) {
features.characterDensity = featureFactory
.linearScaling(density-doc.getMinCharacterDensity(), doc.getMaxCharacterDensity()-doc.getMinCharacterDensity(), NBBINS_DENSITY);
//System.out.println((density-doc.getMinCharacterDensity()) + " " + (doc.getMaxCharacterDensity()-doc.getMinCharacterDensity()) + " " + NBBINS_DENSITY + " " + features.characterDensity);
}
if (previousFeatures != null)
header.append(previousFeatures.printVector());
previousFeatures = features;
n++;
}
if (previousFeatures != null) {
previousFeatures.blockStatus = "BLOCKEND";
previousFeatures.lineStatus = "LINEEND";
header.append(previousFeatures.printVector());
previousFeatures = null;
}
}
}
return Pair.of(header.toString(), headerTokenizations);
}
/**
* Extract results from a labelled header.
*
* @param result result
* @param tokenizations list of tokens
* @param biblio biblio item
* @return a biblio item
*/
public BiblioItem resultExtraction(String result, List<LayoutToken> tokenizations, BiblioItem biblio, Document doc) {
TaggingLabel lastClusterLabel = null;
TaggingTokenClusteror clusteror = new TaggingTokenClusteror(GrobidModels.HEADER, result, tokenizations);
String tokenLabel = null;
List<TaggingTokenCluster> clusters = clusteror.cluster();
for (TaggingTokenCluster cluster : clusters) {
if (cluster == null) {
continue;
}
TaggingLabel clusterLabel = cluster.getTaggingLabel();
Engine.getCntManager().i(clusterLabel);
String clusterContent = LayoutTokensUtil.normalizeDehyphenizeText(cluster.concatTokens());
String clusterNonDehypenizedContent = LayoutTokensUtil.toText(cluster.concatTokens());
if (clusterLabel.equals(TaggingLabels.HEADER_TITLE)) {
/*if (biblio.getTitle() != null && isDifferentContent(biblio.getTitle(), clusterContent))
biblio.setTitle(biblio.getTitle() + clusterContent);
else*/
if (biblio.getTitle() == null) {
biblio.setTitle(clusterContent);
List<LayoutToken> tokens = getLayoutTokens(cluster);
biblio.addTitleTokens(tokens);
}
} else if (clusterLabel.equals(TaggingLabels.HEADER_AUTHOR)) {
//if (biblio.getAuthors() != null && isDifferentandNotIncludedContent(biblio.getAuthors(), clusterContent)) {
if (biblio.getAuthors() != null) {
biblio.setAuthors(biblio.getAuthors() + "\t" + clusterNonDehypenizedContent);
//biblio.addAuthorsToken(new LayoutToken("\n", TaggingLabels.HEADER_AUTHOR));
biblio.addAuthorsToken(new LayoutToken("\t", TaggingLabels.HEADER_AUTHOR));
List<LayoutToken> tokens = cluster.concatTokens();
biblio.addAuthorsTokens(tokens);
} else {
biblio.setAuthors(clusterNonDehypenizedContent);
List<LayoutToken> tokens = cluster.concatTokens();
biblio.addAuthorsTokens(tokens);
}
} /*else if (clusterLabel.equals(TaggingLabels.HEADER_TECH)) {
biblio.setItem(BiblioItem.TechReport);
if (biblio.getBookType() != null) {
biblio.setBookType(biblio.getBookType() + clusterContent);
} else
biblio.setBookType(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_LOCATION)) {
if (biblio.getLocation() != null) {
biblio.setLocation(biblio.getLocation() + clusterContent);
} else
biblio.setLocation(clusterContent);
}*/
else if (clusterLabel.equals(TaggingLabels.HEADER_MEETING)) {
if (biblio.getMeeting() != null) {
biblio.setMeeting(biblio.getMeeting() + ", " + clusterContent);
} else
biblio.setMeeting(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_DATE)) {
// it appears that the same date is quite often repeated,
// we should check, before adding a new date segment, if it is
// not already present
// alternatively we can only keep the first continuous date
/*if (biblio.getPublicationDate() != null && isDifferentandNotIncludedContent(biblio.getPublicationDate(), clusterContent))
biblio.setPublicationDate(biblio.getPublicationDate() + " " + clusterContent);
else*/
// for checking if the date is a server date, we simply look at the string
/*if (biblio.getServerDate() == null) {
if (clusterContent.toLowerCase().indexOf("server") != -1) {
biblio.setServerDate(clusterNonDehypenizedContent);
continue;
}
}*/
if (biblio.getPublicationDate() != null && biblio.getPublicationDate().length() < clusterNonDehypenizedContent.length())
biblio.setPublicationDate(clusterNonDehypenizedContent);
else if (biblio.getPublicationDate() == null)
biblio.setPublicationDate(clusterNonDehypenizedContent);
} /*else if (clusterLabel.equals(TaggingLabels.HEADER_DATESUB)) {
// it appears that the same date is quite often repeated,
// we should check, before adding a new date segment, if it is
// not already present
if (biblio.getSubmissionDate() != null && isDifferentandNotIncludedContent(biblio.getSubmissionDate(), clusterNonDehypenizedContent)) {
biblio.setSubmissionDate(biblio.getSubmissionDate() + " " + clusterNonDehypenizedContent);
} else
biblio.setSubmissionDate(clusterNonDehypenizedContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_DOWNLOAD)) {
// it appears that the same date is quite often repeated,
// we should check, before adding a new date segment, if it is
// not already present
if (biblio.getDownloadDate() != null && isDifferentandNotIncludedContent(biblio.getDownloadDate(), clusterNonDehypenizedContent)) {
biblio.setDownloadDate(biblio.getDownloadDate() + " " + clusterNonDehypenizedContent);
} else
biblio.setDownloadDate(clusterNonDehypenizedContent);
}*/ else if (clusterLabel.equals(TaggingLabels.HEADER_PAGE)) {
/*if (biblio.getPageRange() != null) {
biblio.setPageRange(biblio.getPageRange() + clusterContent);
}*/
if (biblio.getPageRange() == null)
biblio.setPageRange(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_EDITOR)) {
if (biblio.getEditors() != null) {
biblio.setEditors(biblio.getEditors() + "\n" + clusterNonDehypenizedContent);
} else
biblio.setEditors(clusterNonDehypenizedContent);
} /*else if (clusterLabel.equals(TaggingLabels.HEADER_INSTITUTION)) {
if (biblio.getInstitution() != null) {
biblio.setInstitution(biblio.getInstitution() + clusterContent);
} else
biblio.setInstitution(clusterContent);
}*/ else if (clusterLabel.equals(TaggingLabels.HEADER_NOTE)) {
if (biblio.getNote() != null) {
biblio.setNote(biblio.getNote() + " " + clusterContent);
} else
biblio.setNote(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_ABSTRACT)) {
if (biblio.getAbstract() != null) {
// this will need to be reviewed with more training data, for the moment
// avoid concatenation for abstracts as it brings more noise than correct pieces
//biblio.setAbstract(biblio.getAbstract() + " " + clusterContent);
} else
biblio.setAbstract(clusterContent);
//List<LayoutToken> tokens = getLayoutTokens(cluster);
//biblio.addAbstractTokens(tokens);
} else if (clusterLabel.equals(TaggingLabels.HEADER_REFERENCE)) {
//if (biblio.getReference() != null) {
if (biblio.getReference() != null && biblio.getReference().length() < clusterNonDehypenizedContent.length()) {
biblio.setReference(clusterNonDehypenizedContent);
} else
biblio.setReference(clusterNonDehypenizedContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_FUNDING)) {
if (biblio.getFunding() != null) {
biblio.setFunding(biblio.getFunding() + " \n " + clusterContent);
} else
biblio.setFunding(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_COPYRIGHT)) {
if (biblio.getCopyright() != null) {
biblio.setCopyright(biblio.getCopyright() + " " + clusterContent);
} else
biblio.setCopyright(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_AFFILIATION)) {
// affiliation **makers** should be marked SINGLECHAR LINESTART
if (biblio.getAffiliation() != null) {
biblio.setAffiliation(biblio.getAffiliation() + " ; " + clusterContent);
} else
biblio.setAffiliation(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_ADDRESS)) {
if (biblio.getAddress() != null) {
biblio.setAddress(biblio.getAddress() + " " + clusterContent);
} else
biblio.setAddress(clusterContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_EMAIL)) {
if (biblio.getEmail() != null) {
biblio.setEmail(biblio.getEmail() + "\t" + clusterNonDehypenizedContent);
} else
biblio.setEmail(clusterNonDehypenizedContent);
} else if (clusterLabel.equals(TaggingLabels.HEADER_PUBNUM)) {