| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache |
| * XMLBeans", nor may "Apache" appear in their name, without prior |
| * written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2000-2003 BEA Systems |
| * Inc., <http://www.bea.com/>. For more information on the Apache Software |
| * Foundation, please see <http://www.apache.org/>. |
| */ |
| |
| package org.apache.xmlbeans.impl.common; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.BufferedReader; |
| import java.nio.charset.Charset; |
| |
| public class SniffedXmlReader extends BufferedReader |
| { |
| // We don't sniff more than 192 bytes. |
| public static int MAX_SNIFFED_CHARS = 192; |
| |
| public SniffedXmlReader(Reader reader) throws IOException |
| { |
| super(reader); |
| _encoding = sniffForXmlDecl(); |
| } |
| |
| private int readAsMuchAsPossible(char[] buf, int startAt, int len) throws IOException |
| { |
| int total = 0; |
| while (total < len) |
| { |
| int count = read(buf, startAt + total, len - total); |
| if (count < 0) |
| break; |
| total += count; |
| } |
| return total; |
| } |
| |
| // BUGBUG in JDK: Charset.forName is not threadsafe, so we'll prime it |
| // with the common charsets. |
| |
| private static Charset dummy1 = Charset.forName("UTF-8"); |
| private static Charset dummy2 = Charset.forName("UTF-16"); |
| private static Charset dummy3 = Charset.forName("UTF-16BE"); |
| private static Charset dummy4 = Charset.forName("UTF-16LE"); |
| private static Charset dummy5 = Charset.forName("ISO-8859-1"); |
| private static Charset dummy6 = Charset.forName("US-ASCII"); |
| private static Charset dummy7 = Charset.forName("Cp1252"); |
| |
| |
| private String sniffForXmlDecl() throws IOException |
| { |
| mark(MAX_SNIFFED_CHARS); |
| try |
| { |
| char[] buf = new char[MAX_SNIFFED_CHARS]; |
| int limit = readAsMuchAsPossible(buf, 0, MAX_SNIFFED_CHARS); |
| return SniffedXmlInputStream.extractXmlDeclEncoding(buf, 0, limit); |
| } |
| finally |
| { |
| reset(); |
| } |
| } |
| |
| private String _encoding; |
| |
| public String getXmlEncoding() |
| { |
| return _encoding; |
| } |
| } |