107 lines
4.3 KiB
Java
107 lines
4.3 KiB
Java
/*
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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.jfc;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import jdk.internal.org.xml.sax.Attributes;
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import jdk.internal.org.xml.sax.SAXException;
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import jdk.internal.org.xml.sax.helpers.DefaultHandler;
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final class JFCParserHandler extends DefaultHandler {
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private static final String ELEMENT_CONFIGURATION = "configuration";
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private static final String ELEMENT_EVENT_TYPE = "event";
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private static final String ELEMENT_SETTING = "setting";
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private static final String ATTRIBUTE_NAME = "name";
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private static final String ATTRIBUTE_LABEL = "label";
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private static final String ATTRIBUTE_DESCRIPTION = "description";
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private static final String ATTRIBUTE_PROVIDER = "provider";
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private static final String ATTRIBUTE_VERSION = "version";
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final Map<String, String> settings = new LinkedHashMap<String, String>();
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private String currentEventPath;
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private String currentSettingsName;
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private StringBuilder currentCharacters;
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String label;
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String provider;
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String description;
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@Override
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public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
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switch (qName.toLowerCase()) {
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case ELEMENT_CONFIGURATION:
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String version = attributes.getValue(ATTRIBUTE_VERSION);
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if (version == null || !version.startsWith("2.")) {
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throw new SAXException("This version of Flight Recorder can only read JFC file format version 2.x");
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}
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label = attributes.getValue(ATTRIBUTE_LABEL);
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description = getOptional(attributes, ATTRIBUTE_DESCRIPTION, "");
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provider = getOptional(attributes, ATTRIBUTE_PROVIDER, "");
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break;
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case ELEMENT_EVENT_TYPE:
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currentEventPath = attributes.getValue(ATTRIBUTE_NAME);
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break;
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case ELEMENT_SETTING:
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currentSettingsName = attributes.getValue(ATTRIBUTE_NAME);
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break;
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}
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currentCharacters = null;
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}
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private String getOptional(Attributes attributes, String name, String defaultValue) {
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String value = attributes.getValue(name);
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return value == null ? defaultValue : value;
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}
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@Override
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public void characters(char[] ch, int start, int length) throws SAXException {
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if (currentCharacters == null) {
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currentCharacters = new StringBuilder(length);
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}
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currentCharacters.append(ch, start, length);
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}
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@Override
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public void endElement(String uri, String localName, String qName) {
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switch (qName.toLowerCase()) {
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case ELEMENT_CONFIGURATION:
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break;
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case ELEMENT_EVENT_TYPE:
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currentEventPath = null;
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break;
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case ELEMENT_SETTING:
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String settingsValue = currentCharacters == null ? "" : currentCharacters.toString();
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settings.put(currentEventPath + "#" + currentSettingsName, "" + settingsValue);
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currentSettingsName = null;
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break;
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}
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}
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public Map<String, String> getSettings() {
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return settings;
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}
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}
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