org.graylog.plugins.views.search.elasticsearch.QueryStringParser Maven / Gradle / Ivy
/*
* Copyright (C) 2020 Graylog, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* .
*/
package org.graylog.plugins.views.search.elasticsearch;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import org.graylog.plugins.views.search.QueryMetadata;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class QueryStringParser {
private static final Pattern PLACEHOLDER_PATTERN = Pattern.compile("\\$([a-zA-Z_]\\w*)\\$");
public QueryMetadata parse(String queryString) {
if (Strings.isNullOrEmpty(queryString)) {
return QueryMetadata.empty();
}
final Matcher matcher = PLACEHOLDER_PATTERN.matcher(queryString);
Set paramNames = Sets.newHashSet();
while (matcher.find()) {
final String name = matcher.group(1);
paramNames.add(name);
}
return QueryMetadata.builder().usedParameterNames(ImmutableSet.copyOf(paramNames)).build();
}
}