/*
* 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 opennlp.tools.cmdline.parser;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;
import java.util.regex.Pattern;
import opennlp.tools.cmdline.CLI;
import opennlp.tools.cmdline.CmdLineTool;
import opennlp.tools.cmdline.CmdLineUtil;
import opennlp.tools.cmdline.PerformanceMonitor;
import opennlp.tools.cmdline.TerminateToolException;
import opennlp.tools.parser.AbstractBottomUpParser;
import opennlp.tools.parser.Parse;
import opennlp.tools.parser.ParserFactory;
import opennlp.tools.parser.ParserModel;
import opennlp.tools.util.ObjectStream;
import opennlp.tools.util.PlainTextByLineStream;
import opennlp.tools.util.Span;
public final class ParserTool implements CmdLineTool {
public String getName() {
return "Parser";
}
public String getShortDescription() {
return "performs full syntactic parsing";
}
public String getHelp() {
return "Usage: " + CLI.CMD + " " + getName() + " [-bs n -ap n -k n] model < sentences \n" +
"-bs n: Use a beam size of n.\n" +
"-ap f: Advance outcomes in with at least f% of the probability mass.\n" +
"-k n: Show the top n parses. This will also display their log-probablities.";
}
private static Pattern untokenizedParenPattern1 = Pattern.compile("([^ ])([({)}])");
private static Pattern untokenizedParenPattern2 = Pattern.compile("([({)}])([^ ])");
public static Parse[] parseLine(String line, opennlp.tools.parser.Parser parser, int numParses) {
line = untokenizedParenPattern1.matcher(line).replaceAll("$1 $2");
line = untokenizedParenPattern2.matcher(line).replaceAll("$1 $2");
StringTokenizer str = new StringTokenizer(line);
StringBuffer sb = new StringBuffer();
List<String> tokens = new ArrayList<String>();
while (str.hasMoreTokens()) {
String tok = str.nextToken();
tokens.add(tok);
sb.append(tok).append(" ");
}
String text = sb.substring(0, sb.length() - 1);
Parse p = new Parse(text, new Span(0, text.length()), AbstractBottomUpParser.INC_NODE, 0, 0);
int start = 0;
int i=0;
for (Iterator<String> ti = tokens.iterator(); ti.hasNext();i++) {
String tok = ti.next();
p.insert(new Parse(text, new Span(start, start + tok.length()), AbstractBottomUpParser.TOK_NODE, 0,i));
start += tok.length() + 1;
}
Parse[] parses;
if (numParses == 1) {
parses = new Parse[] { parser.parse(p)};
}
else {
parses = parser.parse(p,numParses);
}
return parses;
}
public void run(String[] args) {
if (args.length < 1) {
System.out.println(getHelp());
throw new TerminateToolException(1);
}
ParserModel model = new ParserModelLoader().load(new File(args[args.length - 1]));
Integer beamSize = CmdLineUtil.getIntParameter("-bs", args);
if (beamSize == null)
beamSize = AbstractBottomUpParser.defaultBeamSize;
Integer numParses = CmdLineUtil.getIntParameter("-k", args);
boolean showTopK;
if (numParses == null) {
numParses = 1;
showTopK = false;
}
else {
showTopK = true;
}
Double advancePercentage = CmdLineUtil.getDoubleParameter("-ap", args);
if (advancePercentage == null)
advancePercentage = AbstractBottomUpParser.defaultAdvancePercentage;
opennlp.tools.parser.Parser parser =
ParserFactory.create(model, beamSize, advancePercentage);
ObjectStream<String> lineStream =
new PlainTextByLineStream(new InputStreamReader(System.in));
PerformanceMonitor perfMon = new PerformanceMonitor(System.err, "sent");
perfMon.start();
try {
String line;
while ((line = lineStream.read()) != null) {
if (line.length() == 0) {
System.out.println();
}
else {
Parse[] parses = parseLine(line, parser, numParses);
for (int pi=0,pn=parses.length;pi<pn;pi++) {
if (showTopK) {
System.out.print(pi+" "+parses[pi].getProb()+" ");
}
parses[pi].show();
perfMon.incrementCounter();
}
}
}
}
catch (IOException e) {
CmdLineUtil.handleStdinIoError(e);
}
perfMon.stopAndPrintFinalResult();
}
}