author | mkos |
Fri, 30 Oct 2015 10:34:46 +0100 | |
changeset 33547 | e4c76ac38b12 |
parent 28326 | 2b9860c0d68a |
child 43852 | 93a527059d8a |
permissions | -rw-r--r-- |
12009 | 1 |
/* |
33547
e4c76ac38b12
8139743: Update JAX-WS RI integration to latest version (2.3.0-SNAPSHOT)
mkos
parents:
28326
diff
changeset
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* Copyright (c) 1997, 2012, 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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/* |
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* @(#)HeaderTokenizer.java 1.9 02/03/27 |
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*/ |
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package com.sun.xml.internal.messaging.saaj.packaging.mime.internet; |
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/** |
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* This class tokenizes RFC822 and MIME headers into the basic |
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* symbols specified by RFC822 and MIME. <p> |
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* |
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* This class handles folded headers (ie headers with embedded |
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* CRLF SPACE sequences). The folds are removed in the returned |
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* tokens. |
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* |
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* @version 1.9, 02/03/27 |
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* @author John Mani |
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*/ |
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public class HeaderTokenizer { |
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/** |
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* The Token class represents tokens returned by the |
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* HeaderTokenizer. |
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*/ |
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public static class Token { |
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private int type; |
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private String value; |
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/** |
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* Token type indicating an ATOM. |
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*/ |
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public static final int ATOM = -1; |
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/** |
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* Token type indicating a quoted string. The value |
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* field contains the string without the quotes. |
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*/ |
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public static final int QUOTEDSTRING = -2; |
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/** |
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* Token type indicating a comment. The value field |
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* contains the comment string without the comment |
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* start and end symbols. |
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*/ |
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public static final int COMMENT = -3; |
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/** |
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* Token type indicating end of input. |
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*/ |
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public static final int EOF = -4; |
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/** |
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* Constructor. |
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* @param type Token type |
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* @param value Token value |
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*/ |
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public Token(int type, String value) { |
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this.type = type; |
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this.value = value; |
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} |
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/** |
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* Return the type of the token. If the token represents a |
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* delimiter or a control character, the type is that character |
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* itself, converted to an integer. Otherwise, it's value is |
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* one of the following: |
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* <ul> |
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* <li><code>ATOM</code> A sequence of ASCII characters |
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* delimited by either SPACE, CTL, "(", <"> or the |
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* specified SPECIALS |
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* <li><code>QUOTEDSTRING</code> A sequence of ASCII characters |
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* within quotes |
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* <li><code>COMMENT</code> A sequence of ASCII characters |
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* within "(" and ")". |
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* <li><code>EOF</code> End of header |
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* </ul> |
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*/ |
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public int getType() { |
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return type; |
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} |
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/** |
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* Returns the value of the token just read. When the current |
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* token is a quoted string, this field contains the body of the |
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* string, without the quotes. When the current token is a comment, |
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* this field contains the body of the comment. |
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* |
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* @return token value |
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*/ |
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public String getValue() { |
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return value; |
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} |
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} |
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private String string; // the string to be tokenized |
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private boolean skipComments; // should comments be skipped ? |
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private String delimiters; // delimiter string |
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private int currentPos; // current parse position |
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private int maxPos; // string length |
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private int nextPos; // track start of next Token for next() |
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private int peekPos; // track start of next Token for peek() |
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/** |
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* RFC822 specials |
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*/ |
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public final static String RFC822 = "()<>@,;:\\\"\t .[]"; |
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/** |
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* MIME specials |
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*/ |
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public final static String MIME = "()<>@,;:\\\"\t []/?="; |
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// The EOF Token |
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private final static Token EOFToken = new Token(Token.EOF, null); |
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/** |
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* Constructor that takes a rfc822 style header. |
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* |
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* @param header The rfc822 header to be tokenized |
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* @param delimiters Set of delimiter characters |
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* to be used to delimit ATOMS. These |
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* are usually <code>RFC822</code> or |
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* <code>MIME</code> |
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* @param skipComments If true, comments are skipped and |
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* not returned as tokens |
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*/ |
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public HeaderTokenizer(String header, String delimiters, |
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boolean skipComments) { |
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string = (header == null) ? "" : header; // paranoia ?! |
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this.skipComments = skipComments; |
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this.delimiters = delimiters; |
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currentPos = nextPos = peekPos = 0; |
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maxPos = string.length(); |
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} |
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/** |
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* Constructor. Comments are ignored and not returned as tokens |
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* |
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* @param header The header that is tokenized |
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* @param delimiters The delimiters to be used |
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*/ |
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public HeaderTokenizer(String header, String delimiters) { |
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this(header, delimiters, true); |
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} |
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/** |
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* Constructor. The RFC822 defined delimiters - RFC822 - are |
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* used to delimit ATOMS. Also comments are skipped and not |
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* returned as tokens |
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*/ |
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public HeaderTokenizer(String header) { |
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this(header, RFC822); |
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} |
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/** |
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* Parses the next token from this String. <p> |
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* |
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* Clients sit in a loop calling next() to parse successive |
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* tokens until an EOF Token is returned. |
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* |
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* @return the next Token |
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* @exception ParseException if the parse fails |
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*/ |
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public Token next() throws ParseException { |
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Token tk; |
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currentPos = nextPos; // setup currentPos |
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tk = getNext(); |
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nextPos = peekPos = currentPos; // update currentPos and peekPos |
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return tk; |
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} |
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/** |
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* Peek at the next token, without actually removing the token |
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* from the parse stream. Invoking this method multiple times |
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* will return successive tokens, until <code>next()</code> is |
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* called. <p> |
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* |
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* @return the next Token |
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* @exception ParseException if the parse fails |
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*/ |
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public Token peek() throws ParseException { |
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Token tk; |
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currentPos = peekPos; // setup currentPos |
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tk = getNext(); |
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peekPos = currentPos; // update peekPos |
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return tk; |
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} |
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/** |
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* Return the rest of the Header. |
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* |
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* @return String rest of header. null is returned if we are |
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* already at end of header |
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*/ |
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public String getRemainder() { |
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return string.substring(nextPos); |
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} |
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/* |
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* Return the next token starting from 'currentPos'. After the |
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* parse, 'currentPos' is updated to point to the start of the |
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* next token. |
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*/ |
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private Token getNext() throws ParseException { |
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// If we're already at end of string, return EOF |
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if (currentPos >= maxPos) |
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return EOFToken; |
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// Skip white-space, position currentPos beyond the space |
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if (skipWhiteSpace() == Token.EOF) |
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return EOFToken; |
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char c; |
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int start; |
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boolean filter = false; |
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c = string.charAt(currentPos); |
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// Check or Skip comments and position currentPos |
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// beyond the comment |
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while (c == '(') { |
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// Parsing comment .. |
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int nesting; |
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for (start = ++currentPos, nesting = 1; |
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nesting > 0 && currentPos < maxPos; |
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currentPos++) { |
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c = string.charAt(currentPos); |
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if (c == '\\') { // Escape sequence |
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currentPos++; // skip the escaped character |
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filter = true; |
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} else if (c == '\r') |
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filter = true; |
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else if (c == '(') |
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nesting++; |
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else if (c == ')') |
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nesting--; |
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} |
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if (nesting != 0) |
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throw new ParseException("Unbalanced comments"); |
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if (!skipComments) { |
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// Return the comment, if we are asked to. |
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// Note that the comment start & end markers are ignored. |
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String s; |
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if (filter) // need to go thru the token again. |
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s = filterToken(string, start, currentPos-1); |
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else |
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s = string.substring(start,currentPos-1); |
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return new Token(Token.COMMENT, s); |
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} |
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// Skip any whitespace after the comment. |
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if (skipWhiteSpace() == Token.EOF) |
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return EOFToken; |
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c = string.charAt(currentPos); |
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} |
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// Check for quoted-string and position currentPos |
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// beyond the terminating quote |
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if (c == '"') { |
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for (start = ++currentPos; currentPos < maxPos; currentPos++) { |
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c = string.charAt(currentPos); |
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if (c == '\\') { // Escape sequence |
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currentPos++; |
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filter = true; |
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} else if (c == '\r') |
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filter = true; |
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else if (c == '"') { |
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currentPos++; |
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String s; |
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if (filter) |
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s = filterToken(string, start, currentPos-1); |
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else |
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s = string.substring(start,currentPos-1); |
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return new Token(Token.QUOTEDSTRING, s); |
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} |
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} |
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throw new ParseException("Unbalanced quoted string"); |
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} |
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// Check for SPECIAL or CTL |
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if (c < 040 || c >= 0177 || delimiters.indexOf(c) >= 0) { |
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currentPos++; // re-position currentPos |
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char ch[] = new char[1]; |
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ch[0] = c; |
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return new Token((int)c, new String(ch)); |
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} |
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// Check for ATOM |
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for (start = currentPos; currentPos < maxPos; currentPos++) { |
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c = string.charAt(currentPos); |
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// ATOM is delimited by either SPACE, CTL, "(", <"> |
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// or the specified SPECIALS |
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if (c < 040 || c >= 0177 || c == '(' || c == ' ' || |
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c == '"' || delimiters.indexOf(c) >= 0) |
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break; |
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} |
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return new Token(Token.ATOM, string.substring(start, currentPos)); |
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} |
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// Skip SPACE, HT, CR and NL |
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private int skipWhiteSpace() { |
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char c; |
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for (; currentPos < maxPos; currentPos++) |
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if (((c = string.charAt(currentPos)) != ' ') && |
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(c != '\t') && (c != '\r') && (c != '\n')) |
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return currentPos; |
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return Token.EOF; |
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} |
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/* Process escape sequences and embedded LWSPs from a comment or |
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* quoted string. |
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*/ |
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private static String filterToken(String s, int start, int end) { |
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33547
e4c76ac38b12
8139743: Update JAX-WS RI integration to latest version (2.3.0-SNAPSHOT)
mkos
parents:
28326
diff
changeset
|
349 |
StringBuilder sb = new StringBuilder(); |
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char c; |
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boolean gotEscape = false; |
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boolean gotCR = false; |
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for (int i = start; i < end; i++) { |
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c = s.charAt(i); |
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if (c == '\n' && gotCR) { |
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// This LF is part of an unescaped |
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// CRLF sequence (i.e, LWSP). Skip it. |
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gotCR = false; |
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continue; |
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} |
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gotCR = false; |
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if (!gotEscape) { |
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// Previous character was NOT '\' |
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if (c == '\\') // skip this character |
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gotEscape = true; |
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else if (c == '\r') // skip this character |
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gotCR = true; |
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else // append this character |
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sb.append(c); |
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} else { |
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// Previous character was '\'. So no need to |
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// bother with any special processing, just |
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// append this character |
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sb.append(c); |
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gotEscape = false; |
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} |
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} |
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return sb.toString(); |
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} |
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} |