1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/util/XMLDeclarationParser.java Tue Mar 06 16:09:35 2012 -0800
1.3 @@ -0,0 +1,179 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package com.sun.xml.internal.messaging.saaj.util;
1.30 +
1.31 +import java.io.*;
1.32 +
1.33 +import javax.xml.transform.TransformerException;
1.34 +
1.35 +/*
1.36 + * Class that parses the very first construct in the document i.e.
1.37 + * <?xml ... ?>
1.38 + *
1.39 + * @author Panos Kougiouris (panos@acm.org)
1.40 + * @version
1.41 + */
1.42 +
1.43 +public class XMLDeclarationParser {
1.44 + private String m_encoding;
1.45 + private PushbackReader m_pushbackReader;
1.46 + private boolean m_hasHeader; // preserve the case where no XML Header exists
1.47 + private String xmlDecl = null;
1.48 + static String gt16 = null;
1.49 + static String utf16Decl = null;
1.50 + static {
1.51 + try {
1.52 + gt16 = new String(">".getBytes("utf-16"));
1.53 + utf16Decl = new String("<?xml".getBytes("utf-16"));
1.54 + } catch (Exception e) {}
1.55 + }
1.56 +
1.57 + //---------------------------------------------------------------------
1.58 +
1.59 + public XMLDeclarationParser(PushbackReader pr)
1.60 + {
1.61 + m_pushbackReader = pr;
1.62 + m_encoding = "utf-8";
1.63 + m_hasHeader = false;
1.64 + }
1.65 +
1.66 + //---------------------------------------------------------------------
1.67 + public String getEncoding()
1.68 + {
1.69 + return m_encoding;
1.70 + }
1.71 +
1.72 + public String getXmlDeclaration() {
1.73 + return xmlDecl;
1.74 + }
1.75 +
1.76 + //---------------------------------------------------------------------
1.77 +
1.78 + public void parse() throws TransformerException, IOException
1.79 + {
1.80 + int c = 0;
1.81 + int index = 0;
1.82 + char[] aChar = new char[65535];
1.83 + StringBuffer xmlDeclStr = new StringBuffer();
1.84 + while ((c = m_pushbackReader.read()) != -1) {
1.85 + aChar[index] = (char)c;
1.86 + xmlDeclStr.append((char)c);
1.87 + index++;
1.88 + if (c == '>') {
1.89 + break;
1.90 + }
1.91 + }
1.92 + int len = index;
1.93 +
1.94 + String decl = xmlDeclStr.toString();
1.95 + boolean utf16 = false;
1.96 + boolean utf8 = false;
1.97 +
1.98 + int xmlIndex = decl.indexOf(utf16Decl);
1.99 + if (xmlIndex > -1) {
1.100 + utf16 = true;
1.101 + } else {
1.102 + xmlIndex = decl.indexOf("<?xml");
1.103 + if (xmlIndex > -1) {
1.104 + utf8 = true;
1.105 + }
1.106 + }
1.107 +
1.108 + // no XML decl
1.109 + if (!utf16 && !utf8) {
1.110 + m_pushbackReader.unread(aChar, 0, len);
1.111 + return;
1.112 + }
1.113 + m_hasHeader = true;
1.114 +
1.115 + if (utf16) {
1.116 + xmlDecl = new String(decl.getBytes(), "utf-16");
1.117 + xmlDecl = xmlDecl.substring(xmlDecl.indexOf("<"));
1.118 + } else {
1.119 + xmlDecl = decl;
1.120 + }
1.121 + // do we want to check that there are no other characters preceeding <?xml
1.122 + if (xmlIndex != 0) {
1.123 + throw new IOException("Unexpected characters before XML declaration");
1.124 + }
1.125 +
1.126 + int versionIndex = xmlDecl.indexOf("version");
1.127 + if (versionIndex == -1) {
1.128 + throw new IOException("Mandatory 'version' attribute Missing in XML declaration");
1.129 + }
1.130 +
1.131 + // now set
1.132 + int encodingIndex = xmlDecl.indexOf("encoding");
1.133 + if (encodingIndex == -1) {
1.134 + return;
1.135 + }
1.136 +
1.137 + if (versionIndex > encodingIndex) {
1.138 + throw new IOException("The 'version' attribute should preceed the 'encoding' attribute in an XML Declaration");
1.139 + }
1.140 +
1.141 + int stdAloneIndex = xmlDecl.indexOf("standalone");
1.142 + if ((stdAloneIndex > -1) && ((stdAloneIndex < versionIndex) || (stdAloneIndex < encodingIndex))) {
1.143 + throw new IOException("The 'standalone' attribute should be the last attribute in an XML Declaration");
1.144 + }
1.145 +
1.146 + int eqIndex = xmlDecl.indexOf("=", encodingIndex);
1.147 + if (eqIndex == -1) {
1.148 + throw new IOException("Missing '=' character after 'encoding' in XML declaration");
1.149 + }
1.150 +
1.151 + m_encoding = parseEncoding(xmlDecl, eqIndex);
1.152 + if(m_encoding.startsWith("\"")){
1.153 + m_encoding = m_encoding.substring(m_encoding.indexOf("\"")+1, m_encoding.lastIndexOf("\""));
1.154 + } else if(m_encoding.startsWith("\'")){
1.155 + m_encoding = m_encoding.substring(m_encoding.indexOf("\'")+1, m_encoding.lastIndexOf("\'"));
1.156 + }
1.157 + }
1.158 +
1.159 + //--------------------------------------------------------------------
1.160 +
1.161 + public void writeTo(Writer wr) throws IOException {
1.162 + if (!m_hasHeader) return;
1.163 + wr.write(xmlDecl.toString());
1.164 + }
1.165 +
1.166 + private String parseEncoding(String xmlDeclFinal, int eqIndex) throws IOException {
1.167 + java.util.StringTokenizer strTok = new java.util.StringTokenizer(
1.168 + xmlDeclFinal.substring(eqIndex + 1));
1.169 + if (strTok.hasMoreTokens()) {
1.170 + String encodingTok = strTok.nextToken();
1.171 + int indexofQ = encodingTok.indexOf("?");
1.172 + if (indexofQ > -1) {
1.173 + return encodingTok.substring(0,indexofQ);
1.174 + } else {
1.175 + return encodingTok;
1.176 + }
1.177 + } else {
1.178 + throw new IOException("Error parsing 'encoding' attribute in XML declaration");
1.179 + }
1.180 + }
1.181 +
1.182 +}
