--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/tool/JSONWriter.java Wed Dec 05 16:40:12 2018 +0100
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2016, 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.internal.tool;
+
+import java.io.PrintWriter;
+import java.util.List;
+
+import jdk.jfr.EventType;
+import jdk.jfr.ValueDescriptor;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.consumer.RecordedFrame;
+import jdk.jfr.consumer.RecordedObject;
+
+final class JSONWriter extends EventPrintWriter {
+
+ private boolean first = true;
+
+ public JSONWriter(PrintWriter writer) {
+ super(writer);
+ }
+
+ @Override
+ protected void printBegin() {
+ printObjectBegin();
+ printDataStructureName("recording");
+ printObjectBegin();
+ printDataStructureName("events");
+ printArrayBegin();
+ }
+
+ @Override
+ protected void print(List<RecordedEvent> events) {
+ for (RecordedEvent event : events) {
+ printNewDataStructure(first, true, null);
+ printEvent(event);
+ flush(false);
+ first = false;
+ }
+ }
+
+ @Override
+ protected void printEnd() {
+ printArrayEnd();;
+ printObjectEnd();
+ printObjectEnd();
+ }
+
+ private void printEvent(RecordedEvent event) {
+ printObjectBegin();
+ EventType type = event.getEventType();
+ printValue(true, false, "type", type.getName());
+ printNewDataStructure(false, false, "values");
+ printObjectBegin();
+ boolean first = true;
+ for (ValueDescriptor v : event.getFields()) {
+ printValueDescriptor(first, false, v, getValue(event, v));
+ first = false;
+ }
+ printObjectEnd();
+ printObjectEnd();
+ }
+
+ void printValue(boolean first, boolean arrayElement, String name, Object value) {
+ printNewDataStructure(first, arrayElement, name);
+ if (!printIfNull(value)) {
+ if (value instanceof Boolean) {
+ printAsString(value);
+ return;
+ }
+ if (value instanceof Double) {
+ Double dValue = (Double) value;
+ if (Double.isNaN(dValue) || Double.isInfinite(dValue)) {
+ printNull();
+ return;
+ }
+ printAsString(value);
+ return;
+ }
+ if (value instanceof Float) {
+ Float fValue = (Float) value;
+ if (Float.isNaN(fValue) || Float.isInfinite(fValue)) {
+ printNull();
+ return;
+ }
+ printAsString(value);
+ return;
+ }
+ if (value instanceof Number) {
+ printAsString(value);
+ return;
+ }
+ print("\"");
+ printEscaped(String.valueOf(value));
+ print("\"");
+ }
+ }
+
+ public void printObject(RecordedObject object) {
+ printObjectBegin();
+ boolean first = true;
+ for (ValueDescriptor v : object.getFields()) {
+ printValueDescriptor(first, false, v, getValue(object, v));
+ first = false;
+ }
+ printObjectEnd();
+ }
+
+ private void printArray(ValueDescriptor v, Object[] array) {
+ printArrayBegin();
+ boolean first = true;
+ int depth = 0;
+ for (Object arrayElement : array) {
+ if (!(arrayElement instanceof RecordedFrame) || depth < getStackDepth()) {
+ printValueDescriptor(first, true, v, arrayElement);
+ }
+ depth++;
+ first = false;
+ }
+ printArrayEnd();
+ }
+
+ private void printValueDescriptor(boolean first, boolean arrayElement, ValueDescriptor vd, Object value) {
+ if (vd.isArray() && !arrayElement) {
+ printNewDataStructure(first, arrayElement, vd.getName());
+ if (!printIfNull(value)) {
+ printArray(vd, (Object[]) value);
+ }
+ return;
+ }
+ if (!vd.getFields().isEmpty()) {
+ printNewDataStructure(first, arrayElement, vd.getName());
+ if (!printIfNull(value)) {
+ printObject((RecordedObject) value);
+ }
+ return;
+ }
+ printValue(first, arrayElement, vd.getName(), value);
+ }
+
+ private void printNewDataStructure(boolean first, boolean arrayElement, String name) {
+ if (!first) {
+ print(", ");
+ if (!arrayElement) {
+ println();
+ }
+ }
+ if (!arrayElement) {
+ printDataStructureName(name);
+ }
+ }
+
+ private boolean printIfNull(Object value) {
+ if (value == null) {
+ printNull();
+ return true;
+ }
+ return false;
+ }
+
+ private void printNull() {
+ print("null");
+ }
+
+ private void printDataStructureName(String text) {
+ printIndent();
+ print("\"");
+ print(text);
+ print("\": ");
+ }
+
+ private void printObjectEnd() {
+ retract();
+ println();
+ printIndent();
+ print("}");
+ }
+
+ private void printObjectBegin() {
+ println("{");
+ indent();
+ }
+
+ private void printArrayEnd() {
+ print("]");
+ }
+
+ private void printArrayBegin() {
+ print("[");
+ }
+
+ private void printEscaped(String text) {
+ for (int i = 0; i < text.length(); i++) {
+ printEscaped(text.charAt(i));
+ }
+ }
+
+ private void printEscaped(char c) {
+ if (c == '\b') {
+ print("\\b");
+ return;
+ }
+ if (c == '\n') {
+ print("\\n");
+ return;
+ }
+ if (c == '\t') {
+ print("\\t");
+ return;
+ }
+ if (c == '\f') {
+ print("\\f");
+ return;
+ }
+ if (c == '\r') {
+ print("\\r");
+ return;
+ }
+ if (c == '\"') {
+ print("\\\"");
+ return;
+ }
+ if (c == '\\') {
+ print("\\\\");
+ return;
+ }
+ if (c == '/') {
+ print("\\/");
+ return;
+ }
+ if (c > 0x7F || c < 32) {
+ print("\\u");
+ // 0x10000 will pad with zeros.
+ print(Integer.toHexString(0x10000 + (int) c).substring(1));
+ return;
+ }
+ print(c);
+ }
+}