--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/jdk/jfr/api/settings/StringListSetting.java 2019-02-08 18:33:09.173007528 +0300 @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code 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 General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.jfr.api.settings; +import java.util.HashSet; +import java.util.Set; +import java.util.StringJoiner; + +import jdk.jfr.Description; +import jdk.jfr.Label; +import jdk.jfr.MetadataDefinition; +import jdk.jfr.SettingControl; + +@Label("String List") +@Description("Accepts set of strings, such as \"text\" or \"text1\", \"text2\", or nothing to reject all strings") +@MetadataDefinition +public final class StringListSetting extends SettingControl { + + private Set acceptedStrings = new HashSet<>(); + + @Override + public void setValue(String s) { + acceptedStrings = parseSetting(s); + } + + private Set parseSetting(String s) { + Set stringSet = new HashSet<>(); + StringBuilder sb = new StringBuilder(); + boolean inString = false; + for (int index = 0; index < s.length(); index++) { + char c = s.charAt(index); + if (c != '"') { + if (inString) { + // escape double quotes + if (c == '\\' && index + 1 < s.length()) { + if (s.charAt(index + 1) == '"') { + index++; + c = '"'; + } + } + sb.append(c); + } + } else { + if (inString) { + stringSet.add(sb.toString()); + sb.setLength(0); + } + inString = !inString; + } + } + return stringSet; + } + + @Override + public String getValue() { + StringJoiner sj = new StringJoiner(", ", "\"", "\""); + for (String s : acceptedStrings) { + sj.add(s); + } + return sj.toString(); + } + + @Override + public String combine(Set values) { + Set nameSet = new HashSet<>(); + for (String s : values) { + nameSet.addAll(parseSetting(s)); + } + if (nameSet.isEmpty()) { + return ""; + } + StringJoiner sj = new StringJoiner(", "); + for (String s : nameSet) { + s = s.replace("\"", "\\\""); // escape quotes + sj.add("\"" + s + "\""); + } + return sj.toString(); + } + + public boolean accept(String string) { + return acceptedStrings.contains(string); + } +}