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/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.internal.tool;
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import java.io.PrintWriter;
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import java.util.List;
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import jdk.jfr.EventType;
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import jdk.jfr.ValueDescriptor;
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import jdk.jfr.consumer.RecordedEvent;
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import jdk.jfr.consumer.RecordedFrame;
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import jdk.jfr.consumer.RecordedObject;
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final class XMLWriter extends EventPrintWriter {
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public XMLWriter(PrintWriter destination) {
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super(destination);
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}
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@Override
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protected void printBegin() {
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println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
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println("<recording xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">");
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indent();
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printIndent();
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println("<events>");
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indent();
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}
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@Override
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protected void printEnd() {
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retract();
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printIndent();
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println("</events>");
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retract();
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println("</recording>");
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}
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@Override
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protected void print(List<RecordedEvent> events) {
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for (RecordedEvent event : events) {
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printEvent(event);
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}
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}
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private void printEvent(RecordedEvent event) {
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EventType type = event.getEventType();
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printIndent();
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print("<event");
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printAttribute("type", type.getName());
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print(">");
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println();
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indent();
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for (ValueDescriptor v : event.getFields()) {
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printValueDescriptor(v, getValue(event, v), -1);
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}
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retract();
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printIndent();
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println("</event>");
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println();
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}
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private void printAttribute(String name, String value) {
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print(" ", name, "=\"", value, "\"");
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}
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public void printObject(RecordedObject struct) {
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println();
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indent();
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for (ValueDescriptor v : struct.getFields()) {
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printValueDescriptor(v, getValue(struct, v), -1);
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}
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retract();
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}
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private void printArray(ValueDescriptor v, Object[] array) {
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println();
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indent();
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int depth = 0;
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for (int index = 0; index < array.length; index++) {
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Object arrayElement = array[index];
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if (!(arrayElement instanceof RecordedFrame) || depth < getStackDepth()) {
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printValueDescriptor(v, array[index], index);
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}
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depth++;
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}
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retract();
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}
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private void printValueDescriptor(ValueDescriptor vd, Object value, int index) {
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boolean arrayElement = index != -1;
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String name = arrayElement ? null : vd.getName();
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if (vd.isArray() && !arrayElement) {
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if (printBeginElement("array", name, value, index)) {
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printArray(vd, (Object[]) value);
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printIndent();
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printEndElement("array");
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}
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return;
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}
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if (!vd.getFields().isEmpty()) {
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if (printBeginElement("struct", name, value, index)) {
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printObject((RecordedObject) value);
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printIndent();
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printEndElement("struct");
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}
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return;
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}
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if (printBeginElement("value", name, value, index)) {
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printEscaped(String.valueOf(value));
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printEndElement("value");
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}
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}
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private boolean printBeginElement(String elementName, String name, Object value, int index) {
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printIndent();
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print("<", elementName);
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if (name != null) {
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printAttribute("name", name);
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}
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if (index != -1) {
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printAttribute("index", Integer.toString(index));
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}
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if (value == null) {
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printAttribute("xsi:nil", "true");
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println("/>");
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return false;
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}
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if (value.getClass().isArray()) {
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Object[] array = (Object[]) value;
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printAttribute("size", Integer.toString(array.length));
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}
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print(">");
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return true;
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}
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private void printEndElement(String elementName) {
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print("</");
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print(elementName);
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println(">");
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}
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private void printEscaped(String text) {
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for (int i = 0; i < text.length(); i++) {
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printEscaped(text.charAt(i));
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}
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}
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private void printEscaped(char c) {
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if (c == 34) {
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print(""");
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return;
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}
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if (c == 38) {
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print("&");
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return;
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}
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if (c == 39) {
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print("'");
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return;
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}
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if (c == 60) {
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print("<");
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return;
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}
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if (c == 62) {
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print(">");
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return;
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}
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if (c > 0x7F) {
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print("&#");
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print((int) c);
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print(';');
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return;
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}
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print(c);
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}
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}
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