test/jdk/jdk/jfr/api/settings/StringListSetting.java
changeset 50113 caf115bb98ad
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/api/settings/StringListSetting.java	Tue May 15 20:24:34 2018 +0200
@@ -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<String> acceptedStrings = new HashSet<>();
+
+    @Override
+    public void setValue(String s) {
+        acceptedStrings = parseSetting(s);
+    }
+
+    private Set<String> parseSetting(String s) {
+        Set<String> 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<String> values) {
+        Set<String> 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);
+    }
+}