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Stanford Parser processes raw text in English, Chinese, German, Arabic, and French, and extracts constituency parse trees.
package edu.stanford.nlp.parser.lexparser;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
import edu.stanford.nlp.io.IOUtils;
import edu.stanford.nlp.io.RuntimeIOException;
import edu.stanford.nlp.ling.HasWord;
import edu.stanford.nlp.ling.Sentence;
import edu.stanford.nlp.parser.common.ParserQuery;
import edu.stanford.nlp.parser.common.ParserUtils;
import edu.stanford.nlp.parser.common.ParsingThreadsafeProcessor;
import edu.stanford.nlp.parser.metrics.AbstractEval;
import edu.stanford.nlp.process.TokenizerFactory;
import edu.stanford.nlp.process.DocumentPreprocessor;
import edu.stanford.nlp.process.DocumentPreprocessor.DocType;
import edu.stanford.nlp.trees.*;
import edu.stanford.nlp.util.ScoredObject;
import edu.stanford.nlp.util.Timing;
import edu.stanford.nlp.util.concurrent.MulticoreWrapper;
/**
* Runs the parser over a set of files. This is useful for making it
* operate in a multithreaded manner. If you want access to the
* various stats it keeps, create the object and call parseFiles;
* otherwise, the static parseFiles is a good convenience method.
*
* @author John Bauer (refactored from existing code)
*/
public class ParseFiles {
private final TreebankLanguagePack tlp;
// todo: perhaps the output streams could be passed in
private final PrintWriter pwOut;
private final PrintWriter pwErr;
private int numWords = 0;
private int numSents = 0;
private int numUnparsable = 0;
private int numNoMemory = 0;
private int numFallback = 0;
private int numSkipped = 0;
private boolean saidMemMessage = false;
private final boolean runningAverages;
private final boolean summary;
private final AbstractEval.ScoreEval pcfgLL;
private final AbstractEval.ScoreEval depLL;
private final AbstractEval.ScoreEval factLL;
private final Options op;
private final LexicalizedParser pqFactory;
private final TreePrint treePrint;
/** Parse the files with names given in the String array args elements from
* index argIndex on. Convenience method which builds and invokes a ParseFiles object.
*/
public static void parseFiles(String[] args, int argIndex, boolean tokenized, TokenizerFactory tokenizerFactory, String elementDelimiter, String sentenceDelimiter, Function, List> escaper, String tagDelimiter, Options op, TreePrint treePrint, LexicalizedParser pqFactory) {
ParseFiles pf = new ParseFiles(op, treePrint, pqFactory);
pf.parseFiles(args, argIndex, tokenized, tokenizerFactory, elementDelimiter, sentenceDelimiter, escaper, tagDelimiter);
}
public ParseFiles(Options op, TreePrint treePrint, LexicalizedParser pqFactory) {
this.op = op;
this.pqFactory = pqFactory;
this.treePrint = treePrint;
this.tlp = op.tlpParams.treebankLanguagePack();
this.pwOut = op.tlpParams.pw();
this.pwErr = op.tlpParams.pw(System.err);
if (op.testOptions.verbose) {
pwErr.println("Sentence final words are: " + Arrays.asList(tlp.sentenceFinalPunctuationWords()));
pwErr.println("File encoding is: " + op.tlpParams.getInputEncoding());
}
// evaluation setup
this.runningAverages = Boolean.parseBoolean(op.testOptions.evals.getProperty("runningAverages"));
this.summary = Boolean.parseBoolean(op.testOptions.evals.getProperty("summary"));
if (Boolean.parseBoolean(op.testOptions.evals.getProperty("pcfgLL"))) {
this.pcfgLL = new AbstractEval.ScoreEval("pcfgLL", runningAverages);
} else {
this.pcfgLL = null;
}
if (Boolean.parseBoolean(op.testOptions.evals.getProperty("depLL"))) {
this.depLL = new AbstractEval.ScoreEval("depLL", runningAverages);
} else {
this.depLL = null;
}
if (Boolean.parseBoolean(op.testOptions.evals.getProperty("factLL"))) {
this.factLL = new AbstractEval.ScoreEval("factLL", runningAverages);
} else {
this.factLL = null;
}
}
public void parseFiles(String[] args, int argIndex, boolean tokenized, TokenizerFactory tokenizerFactory, String elementDelimiter, String sentenceDelimiter, Function, List> escaper, String tagDelimiter) {
final DocType docType = (elementDelimiter == null) ? DocType.Plain : DocType.XML;
if (op.testOptions.verbose) {
if(tokenizerFactory != null)
pwErr.println("parseFiles: Tokenizer factory is: " + tokenizerFactory);
}
final Timing timer = new Timing();
timer.start();
//Loop over the files
for (int i = argIndex; i < args.length; i++) {
final String filename = args[i];
final DocumentPreprocessor documentPreprocessor;
if (filename.equals("-")) {
try {
documentPreprocessor = new DocumentPreprocessor(IOUtils.readerFromStdin(op.tlpParams.getInputEncoding()), docType);
} catch (IOException e) {
throw new RuntimeIOException(e);
}
} else {
documentPreprocessor = new DocumentPreprocessor(filename,docType,op.tlpParams.getInputEncoding());
}
//Unused values are null per the main() method invocation below
//null is the default for these properties
documentPreprocessor.setSentenceFinalPuncWords(tlp.sentenceFinalPunctuationWords());
documentPreprocessor.setEscaper(escaper);
documentPreprocessor.setSentenceDelimiter(sentenceDelimiter);
documentPreprocessor.setTagDelimiter(tagDelimiter);
documentPreprocessor.setElementDelimiter(elementDelimiter);
if(tokenizerFactory == null)
documentPreprocessor.setTokenizerFactory((tokenized) ? null : tlp.getTokenizerFactory());
else
documentPreprocessor.setTokenizerFactory(tokenizerFactory);
//Setup the output
PrintWriter pwo = pwOut;
if (op.testOptions.writeOutputFiles) {
String normalizedName = filename;
try {
new URL(normalizedName); // this will exception if not a URL
normalizedName = normalizedName.replaceAll("/","_");
} catch (MalformedURLException e) {
//It isn't a URL, so silently ignore
}
String ext = (op.testOptions.outputFilesExtension == null) ? "stp" : op.testOptions.outputFilesExtension;
String fname = normalizedName + '.' + ext;
if (op.testOptions.outputFilesDirectory != null && !op.testOptions.outputFilesDirectory.equals("")) {
String fseparator = System.getProperty("file.separator");
if (fseparator == null || fseparator.isEmpty()) {
fseparator = "/";
}
File fnameFile = new File(fname);
fname = op.testOptions.outputFilesDirectory + fseparator + fnameFile.getName();
}
try {
pwo = op.tlpParams.pw(new FileOutputStream(fname));
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
treePrint.printHeader(pwo, op.tlpParams.getOutputEncoding());
pwErr.println("Parsing file: " + filename);
int num = 0;
int numProcessed = 0;
if (op.testOptions.testingThreads != 1) {
MulticoreWrapper, ParserQuery> wrapper = new MulticoreWrapper<>(op.testOptions.testingThreads, new ParsingThreadsafeProcessor(pqFactory, pwErr));
for (List sentence : documentPreprocessor) {
num++;
numSents++;
int len = sentence.size();
numWords += len;
pwErr.println("Parsing [sent. " + num + " len. " + len + "]: " + Sentence.listToString(sentence, true));
wrapper.put(sentence);
while (wrapper.peek()) {
ParserQuery pq = wrapper.poll();
processResults(pq, numProcessed++, pwo);
}
}
wrapper.join();
while (wrapper.peek()) {
ParserQuery pq = wrapper.poll();
processResults(pq, numProcessed++, pwo);
}
} else {
ParserQuery pq = pqFactory.parserQuery();
for (List sentence : documentPreprocessor) {
num++;
numSents++;
int len = sentence.size();
numWords += len;
pwErr.println("Parsing [sent. " + num + " len. " + len + "]: " + Sentence.listToString(sentence, true));
pq.parseAndReport(sentence, pwErr);
processResults(pq, numProcessed++, pwo);
}
}
treePrint.printFooter(pwo);
if (op.testOptions.writeOutputFiles) pwo.close();
pwErr.println("Parsed file: " + filename + " [" + num + " sentences].");
}
long millis = timer.stop();
if (summary) {
if (pcfgLL != null) pcfgLL.display(false, pwErr);
if (depLL != null) depLL.display(false, pwErr);
if (factLL != null) factLL.display(false, pwErr);
}
if (saidMemMessage) {
ParserUtils.printOutOfMemory(pwErr);
}
double wordspersec = numWords / (((double) millis) / 1000);
double sentspersec = numSents / (((double) millis) / 1000);
NumberFormat nf = new DecimalFormat("0.00"); // easier way!
pwErr.println("Parsed " + numWords + " words in " + numSents +
" sentences (" + nf.format(wordspersec) + " wds/sec; " +
nf.format(sentspersec) + " sents/sec).");
if (numFallback > 0) {
pwErr.println(" " + numFallback + " sentences were parsed by fallback to PCFG.");
}
if (numUnparsable > 0 || numNoMemory > 0 || numSkipped > 0) {
pwErr.println(" " + (numUnparsable + numNoMemory + numSkipped) + " sentences were not parsed:");
if (numUnparsable > 0) {
pwErr.println(" " + numUnparsable + " were not parsable with non-zero probability.");
}
if (numNoMemory > 0) {
pwErr.println(" " + numNoMemory + " were skipped because of insufficient memory.");
}
if (numSkipped > 0) {
pwErr.println(" " + numSkipped + " were skipped as length 0 or greater than " + op.testOptions.maxLength);
}
}
} // end parseFiles
public void processResults(ParserQuery parserQuery, int num, PrintWriter pwo) {
if (parserQuery.parseSkipped()) {
List sentence = parserQuery.originalSentence();
if (sentence != null) {
numWords -= sentence.size();
}
numSkipped++;
}
if (parserQuery.parseNoMemory()) numNoMemory++;
if (parserQuery.parseUnparsable()) numUnparsable++;
if (parserQuery.parseFallback()) numFallback++;
saidMemMessage = saidMemMessage || parserQuery.saidMemMessage();
Tree ansTree = parserQuery.getBestParse();
if (ansTree == null) {
pwo.println("(())");
return;
}
if (pcfgLL != null && parserQuery.getPCFGParser() != null) {
pcfgLL.recordScore(parserQuery.getPCFGParser(), pwErr);
}
if (depLL != null && parserQuery.getDependencyParser() != null) {
depLL.recordScore(parserQuery.getDependencyParser(), pwErr);
}
if (factLL != null && parserQuery.getFactoredParser() != null) {
factLL.recordScore(parserQuery.getFactoredParser(), pwErr);
}
try {
treePrint.printTree(ansTree, Integer.toString(num), pwo);
} catch (RuntimeException re) {
pwErr.println("TreePrint.printTree skipped: out of memory (or other error)");
re.printStackTrace();
numNoMemory++;
try {
treePrint.printTree(null, Integer.toString(num), pwo);
} catch (Exception e) {
pwErr.println("Sentence skipped: out of memory or error calling TreePrint.");
pwo.println("(())");
e.printStackTrace();
}
}
// crude addition of k-best tree printing
// TODO: interface with the RerankingParserQuery
if (op.testOptions.printPCFGkBest > 0 && parserQuery.getPCFGParser() != null && parserQuery.getPCFGParser().hasParse()) {
List> trees = parserQuery.getKBestPCFGParses(op.testOptions.printPCFGkBest);
treePrint.printTrees(trees, Integer.toString(num), pwo);
} else if (op.testOptions.printFactoredKGood > 0 && parserQuery.getFactoredParser() != null && parserQuery.getFactoredParser().hasParse()) {
// DZ: debug n best trees
List> trees = parserQuery.getKGoodFactoredParses(op.testOptions.printFactoredKGood);
treePrint.printTrees(trees, Integer.toString(num), pwo);
}
}
}