blob: 1056df09b1f216c9ba252124ed8078a15201de20 [file] [log] [blame]
/*
* 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.sysds.runtime.lineage;
import org.apache.sysds.parser.ParseException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class LineageTokenizer {
private final List<TokenInfo> _tokenInfos;
public LineageTokenizer() {
_tokenInfos = new ArrayList<>();
}
public void add(String regex, String key) {
_tokenInfos.add(new TokenInfo(Pattern.compile("^(" + regex + ")"), key));
}
public void add(String regex) {
_tokenInfos.add(new TokenInfo(Pattern.compile("^(" + regex + ")"), ""));
}
public Map<String, String> tokenize(String str) {
Map<String, String> tokens = new HashMap<>();
for (TokenInfo info : _tokenInfos) {
Matcher m = info.regex.matcher(str);
if (m.find()) {
String tok = m.group().trim();
if (!info.key.isEmpty())
tokens.put(info.key, tok);
str = m.replaceFirst("");
}
}
if (!str.isEmpty())
throw new ParseException("Unexpected character in input: " + str);
return tokens;
}
private class TokenInfo {
public final Pattern regex;
public final String key;
public TokenInfo(Pattern regex, String key) {
super();
this.regex = regex;
this.key = key;
}
}
}