/*
* 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
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*/
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 XMLWriter extends EventPrintWriter {
public XMLWriter(PrintWriter destination) {
super(destination);
}
@Override
protected void printBegin() {
println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
println("<recording xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">");
indent();
printIndent();
println("<events>");
indent();
}
@Override
protected void printEnd() {
retract();
printIndent();
println("</events>");
retract();
println("</recording>");
}
@Override
protected void print(List<RecordedEvent> events) {
for (RecordedEvent event : events) {
printEvent(event);
}
}
private void printEvent(RecordedEvent event) {
EventType type = event.getEventType();
printIndent();
print("<event");
printAttribute("type", type.getName());
print(">");
println();
indent();
for (ValueDescriptor v : event.getFields()) {
printValueDescriptor(v, getValue(event, v), -1);
}
retract();
printIndent();
println("</event>");
println();
}
private void printAttribute(String name, String value) {
print(" ", name, "=\"", value, "\"");
}
public void printObject(RecordedObject struct) {
println();
indent();
for (ValueDescriptor v : struct.getFields()) {
printValueDescriptor(v, getValue(struct, v), -1);
}
retract();
}
private void printArray(ValueDescriptor v, Object[] array) {
println();
indent();
int depth = 0;
for (int index = 0; index < array.length; index++) {
Object arrayElement = array[index];
if (!(arrayElement instanceof RecordedFrame) || depth < getStackDepth()) {
printValueDescriptor(v, array[index], index);
}
depth++;
}
retract();
}
private void printValueDescriptor(ValueDescriptor vd, Object value, int index) {
boolean arrayElement = index != -1;
String name = arrayElement ? null : vd.getName();
if (vd.isArray() && !arrayElement) {
if (printBeginElement("array", name, value, index)) {
printArray(vd, (Object[]) value);
printIndent();
printEndElement("array");
}
return;
}
if (!vd.getFields().isEmpty()) {
if (printBeginElement("struct", name, value, index)) {
printObject((RecordedObject) value);
printIndent();
printEndElement("struct");
}
return;
}
if (printBeginElement("value", name, value, index)) {
printEscaped(String.valueOf(value));
printEndElement("value");
}
}
private boolean printBeginElement(String elementName, String name, Object value, int index) {
printIndent();
print("<", elementName);
if (name != null) {
printAttribute("name", name);
}
if (index != -1) {
printAttribute("index", Integer.toString(index));
}
if (value == null) {
printAttribute("xsi:nil", "true");
println("/>");
return false;
}
if (value.getClass().isArray()) {
Object[] array = (Object[]) value;
printAttribute("size", Integer.toString(array.length));
}
print(">");
return true;
}
private void printEndElement(String elementName) {
print("</");
print(elementName);
println(">");
}
private void printEscaped(String text) {
for (int i = 0; i < text.length(); i++) {
printEscaped(text.charAt(i));
}
}
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