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/* LanguageTool, a natural language style checker
* Copyright (C) 2017 Daniel Naber (http://www.danielnaber.de)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA
*/
package org.languagetool.server;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.jetbrains.annotations.NotNull;
import org.languagetool.AnalyzedSentence;
import org.languagetool.AnalyzedTokenReadings;
import org.languagetool.Experimental;
import org.languagetool.Language;
import org.languagetool.rules.Rule;
import org.languagetool.rules.RuleMatch;
import org.languagetool.tools.Tools;
import javax.xml.stream.XMLStreamException;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
/**
* Extend results by adding rules matches from a different API server.
* @since 4.0
*/
@Experimental
class ResultExtender {
private final URL url;
private final int connectTimeoutMillis;
private final ObjectMapper mapper = new ObjectMapper();
private final ExecutorService executor = Executors.newSingleThreadExecutor();
ResultExtender(String url, int connectTimeoutMillis) {
this.url = Tools.getUrl(url);
if (connectTimeoutMillis <= 0) {
throw new IllegalArgumentException("connectTimeoutMillis must be > 0: " + connectTimeoutMillis);
}
this.connectTimeoutMillis = connectTimeoutMillis;
}
/**
* Filter {@code extensionMatches} so that only those matches are left that don't cover or touch one of the {@code matches}.
*/
@NotNull
List getFilteredExtensionMatches(List matches, List extensionMatches) {
RuleMatch hiddenRuleMatch = new RuleMatch(new HiddenRule(), new AnalyzedSentence(new AnalyzedTokenReadings[]{}), 0, 1, "(hidden message)");
List filteredExtMatches = new ArrayList<>();
for (RemoteRuleMatch extensionMatch : extensionMatches) {
if (!extensionMatch.isTouchedByOneOf(matches)) {
filteredExtMatches.add(hiddenRuleMatch);
}
}
return filteredExtMatches;
}
@NotNull
Future> getExtensionMatches(String plainText, Language lang) throws IOException, XMLStreamException {
return executor.submit(() -> {
HttpURLConnection huc = (HttpURLConnection) url.openConnection();
HttpURLConnection.setFollowRedirects(false);
huc.setConnectTimeout(connectTimeoutMillis);
huc.setRequestMethod("POST");
huc.setDoOutput(true);
huc.connect();
try (DataOutputStream wr = new DataOutputStream(huc.getOutputStream())) {
String urlParameters = "language=" + lang.getShortCodeWithCountryAndVariant() + "&text=" + plainText;
byte[] postData = urlParameters.getBytes(StandardCharsets.UTF_8);
wr.write(postData);
}
InputStream input = huc.getInputStream();
List remoteRuleMatches = parseJson(input);
huc.disconnect();
return remoteRuleMatches;
});
}
@NotNull
private List parseJson(InputStream inputStream) throws XMLStreamException, IOException {
Map map = mapper.readValue(inputStream, Map.class);
List matches = (ArrayList) map.get("matches");
List result = new ArrayList<>();
for (Object match : matches) {
RemoteRuleMatch remoteMatch = getMatch((Map)match);
result.add(remoteMatch);
}
return result;
}
@NotNull
private RemoteRuleMatch getMatch(Map match) {
Map rule = (Map) match.get("rule");
int offset = (int) getRequired(match, "offset");
int errorLength = (int) getRequired(match, "length");
Map context = (Map) match.get("context");
int contextOffset = (int) getRequired(context, "offset");
RemoteRuleMatch remoteMatch = new RemoteRuleMatch(getRequiredString(rule, "id"), getRequiredString(match, "message"),
getRequiredString(context, "text"), contextOffset, offset, errorLength);
remoteMatch.setShortMsg(getOrNull(match, "shortMessage"));
remoteMatch.setRuleSubId(getOrNull(rule, "subId"));
remoteMatch.setLocQualityIssueType(getOrNull(rule, "issueType"));
List urls = getValueList(rule, "urls");
if (urls.size() > 0) {
remoteMatch.setUrl(urls.get(0));
}
Map category = (Map) rule.get("category");
remoteMatch.setCategory(getOrNull(category, "name"));
remoteMatch.setCategoryId(getOrNull(category, "id"));
remoteMatch.setReplacements(getValueList(match, "replacements"));
return remoteMatch;
}
private Object getRequired(Map elem, String propertyName) {
Object val = elem.get(propertyName);
if (val != null) {
return val;
}
throw new RuntimeException("JSON item " + elem + " doesn't contain required property '" + propertyName + "'");
}
private String getRequiredString(Map elem, String propertyName) {
return (String) getRequired(elem, propertyName);
}
private String getOrNull(Map elem, String propertyName) {
Object val = elem.get(propertyName);
if (val != null) {
return (String) val;
}
return null;
}
private List getValueList(Map match, String propertyName) {
List
