86 lines
3.4 KiB
Java
86 lines
3.4 KiB
Java
/*
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* Copyright (c) 2012, 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.io.CharArrayReader;
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import java.io.CharArrayWriter;
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import java.io.IOException;
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import java.io.Reader;
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import java.text.ParseException;
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import jdk.internal.org.xml.sax.InputSource;
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import jdk.internal.org.xml.sax.SAXException;
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import jdk.internal.util.xml.SAXParser;
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import jdk.internal.util.xml.impl.SAXParserImpl;
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import jdk.jfr.Configuration;
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import jdk.jfr.internal.PrivateAccess;
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/**
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* Parses a JDK Flight Recorder Configuration file (.jfc)
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*/
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final class JFCParser {
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static final String FILE_EXTENSION = ".jfc";
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private static final int MAXIMUM_FILE_SIZE = 1024 * 1024;
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public static Configuration createConfiguration(String name, Reader reader) throws IOException, ParseException {
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return createConfiguration(name, readContent(reader));
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}
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public static Configuration createConfiguration(String name, String content) throws IOException, ParseException {
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try {
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JFCParserHandler ch = new JFCParserHandler();
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parseXML(content, ch);
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return PrivateAccess.getInstance().newConfiguration(name, ch.label, ch.description, ch.provider, ch.settings, content);
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} catch (IllegalArgumentException iae) {
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throw new ParseException(iae.getMessage(), -1);
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} catch (SAXException e) {
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ParseException pe = new ParseException("Error reading JFC file. " + e.getMessage(), -1);
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pe.initCause(e);
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throw pe;
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}
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}
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private static void parseXML(String content, JFCParserHandler ch) throws SAXException, IOException {
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CharArrayReader r = new CharArrayReader(content.toCharArray());
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SAXParser parser = new SAXParserImpl();
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parser.parse(new InputSource(r), ch);
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}
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private static String readContent(Reader r) throws IOException {
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CharArrayWriter writer = new CharArrayWriter(1024);
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int count = 0;
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int ch;
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while ((ch = r.read()) != -1) {
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writer.write(ch);
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count++;
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if (count >= MAXIMUM_FILE_SIZE) {
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throw new IOException("Presets with more than " + MAXIMUM_FILE_SIZE + " characters can't be read.");
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}
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}
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return new String(writer.toCharArray());
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}
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}
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