root / import / ext3D / trunk / install-extension3d / IzPack / src / lib / net / n3 / nanoxml / XMLUtil.java @ 15280
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/* XMLUtil.java NanoXML/Java
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*
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* $Revision: 1.1 $
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* $Date: 2006/06/14 07:29:07 $
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* $Name: $
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*
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* This file is part of NanoXML 2 for Java.
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* Copyright (C) 2001 Marc De Scheemaecker, All Rights Reserved.
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the authors be held liable for any damages arising from the
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* use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in
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* a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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package net.n3.nanoxml; |
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import java.io.CharArrayReader; |
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import java.io.IOException; |
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import java.io.Reader; |
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/**
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* Utility methods for NanoXML.
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*
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* @author Marc De Scheemaecker
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* @version $Name: $, $Revision: 1.1 $
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*/
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class XMLUtil |
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{
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/**
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* Skips the remainder of a comment.
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* It is assumed that <!- is already read.
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*
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* @param reader the reader
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* @param entityResolver the entity resolver
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static void skipComment(IXMLReader reader, |
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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if (reader.read() != '-') { |
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XMLUtil.skipTag(reader, '\0', entityResolver);
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return;
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} |
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int dashesRead = 0; |
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for (;;) {
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char ch = reader.read();
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switch (ch) {
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case '-': |
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dashesRead++; |
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break;
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case '>': |
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if (dashesRead == 2) { |
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return;
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} |
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default:
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dashesRead = 0;
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} |
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} |
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} |
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/**
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* Skips the remainder of the current XML tag.
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*
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param entityResolver the entity resolver
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static void skipTag(IXMLReader reader, |
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char escapeChar,
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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int level = 1; |
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while (level > 0) { |
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char ch = XMLUtil.read(reader, null, escapeChar, entityResolver); |
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switch (ch) {
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case '<': |
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++level; |
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break;
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case '>': |
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--level; |
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break;
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} |
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} |
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} |
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/**
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* Scans a public ID.
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*
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* @param publicID will contain the public ID
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param entityResolver the entity resolver
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*
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* @return the system ID
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static String scanPublicID(StringBuffer publicID, |
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IXMLReader reader, |
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char escapeChar,
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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if (! XMLUtil.checkLiteral(reader, escapeChar, entityResolver,
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"UBLIC")) {
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return null; |
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} |
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XMLUtil.skipWhitespace(reader, escapeChar, null, null); |
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publicID.append(XMLUtil.scanString(reader, escapeChar, false,
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entityResolver)); |
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XMLUtil.skipWhitespace(reader, escapeChar, null, null); |
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return XMLUtil.scanString(reader, escapeChar, false, entityResolver); |
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} |
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/**
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* Scans a system ID.
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*
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param entityResolver the entity resolver
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*
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* @return the system ID
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static String scanSystemID(IXMLReader reader, |
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char escapeChar,
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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if (! XMLUtil.checkLiteral(reader, escapeChar, entityResolver,
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"YSTEM")) {
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return null; |
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} |
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XMLUtil.skipWhitespace(reader, escapeChar, null, null); |
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return XMLUtil.scanString(reader, escapeChar, false, entityResolver); |
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} |
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/**
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* Retrieves an identifier from the data.
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*
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param entityResolver the entity resolver
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static String scanIdentifier(IXMLReader reader, |
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char escapeChar,
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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StringBuffer result = new StringBuffer(); |
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for (;;) {
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char ch = XMLUtil.read(reader, null, escapeChar, entityResolver); |
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if ((ch == '_') || (ch == ':') || (ch == '-') || (ch == '.') |
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|| ((ch >= 'a') && (ch <= 'z')) |
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|| ((ch >= 'A') && (ch <= 'Z')) |
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|| ((ch >= '0') && (ch <= '9')) || (ch > '\u007E')) { |
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result.append(ch); |
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} else {
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reader.unread(ch); |
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break;
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} |
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} |
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return result.toString();
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} |
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/**
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* Retrieves a delimited string from the data.
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*
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param normalizeWhitespace if all whitespace chars need to be converted
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* to spaces
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* @param entityResolver the entity resolver
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static String scanString(IXMLReader reader, |
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char escapeChar,
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boolean normalizeWhitespace,
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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StringBuffer result = new StringBuffer(); |
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boolean isEntity[] = new boolean[1]; |
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char delim = XMLUtil.read(reader, null, escapeChar, entityResolver); |
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if ((delim != '\'') && (delim != '"')) { |
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XMLUtil.errorExpectedInput(reader.getSystemID(), |
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reader.getLineNr(), |
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"delimited string");
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} |
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for (;;) {
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char ch = XMLUtil.read(reader, isEntity, escapeChar,
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entityResolver); |
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if ((! isEntity[0]) && (ch == escapeChar)) { |
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reader.startNewStream(XMLUtil.scanEntity(isEntity, reader, |
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escapeChar, |
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entityResolver)); |
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ch = reader.read(); |
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} |
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if ((! isEntity[0]) && (ch == delim)) { |
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break;
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} else if (normalizeWhitespace && (ch < ' ')) { |
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result.append(' ');
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} else {
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result.append(ch); |
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} |
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} |
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return result.toString();
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} |
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/**
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* Processes an entity.
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*
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* @param isCharLiteral will contain true if the entity is a char literal
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param entityResolver the entity resolver
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*
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* @return a reader from which the entity value can be retrieved
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static Reader scanEntity(boolean[] isCharLiteral, |
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IXMLReader reader, |
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char escapeChar,
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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char ch = reader.read();
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StringBuffer keyBuf = new StringBuffer(); |
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while (ch != ';') { |
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keyBuf.append(ch); |
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ch = reader.read(); |
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} |
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String key = keyBuf.toString();
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if (key.charAt(0) == '#') { |
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if (isCharLiteral != null) { |
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isCharLiteral[0] = true; |
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} |
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char[] chArr = new char[1]; |
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if (key.charAt(1) == 'x') { |
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chArr[0] = (char) Integer.parseInt(key.substring(2), 16); |
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} else {
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chArr[0] = (char) Integer.parseInt(key.substring(1), 10); |
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} |
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return new CharArrayReader(chArr); |
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} else {
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Reader entityReader = entityResolver.getEntity(reader, key);
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if (entityReader == null) { |
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XMLUtil.errorInvalidEntity(reader.getSystemID(), |
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reader.getLineNr(), |
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key); |
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} |
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return entityReader;
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} |
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} |
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/**
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* Skips whitespace from the reader.
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*
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param buffer where to put the whitespace; null if the
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* whitespace does not have to be stored.
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* @param isEntity if not null, will contain true if the data
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* following the whitespace is an entity
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static void skipWhitespace(IXMLReader reader, |
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char escapeChar,
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StringBuffer buffer,
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boolean[] isEntity) |
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throws IOException |
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{
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char ch;
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if (buffer == null) { |
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do {
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ch = reader.read(); |
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} while ((ch == ' ') || (ch == '\t') || (ch == '\n') |
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|| (ch == '\r'));
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} else {
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for (;;) {
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ch = reader.read(); |
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if ((ch != ' ') && (ch != '\t') && (ch != '\n') |
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&& (ch != '\r')) {
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break;
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} |
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buffer.append(ch); |
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} |
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} |
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reader.unread(ch); |
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if (isEntity != null) { |
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isEntity[0] = (ch == escapeChar);
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} |
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} |
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/**
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* Reads a character from the reader.
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*
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* @param reader the reader
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* @param isEntityValue if the character is the first character in an
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* entity
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* @param escapeChar the escape character (& or %)
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* @param entityResolver the entity resolver
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static char read(IXMLReader reader, |
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boolean[] isEntityValue, |
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char escapeChar,
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IXMLEntityResolver entityResolver) |
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throws IOException, XMLParseException |
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{
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char ch = reader.read();
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if (isEntityValue != null) { |
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isEntityValue[0] = false; |
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} |
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if (ch == escapeChar) {
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boolean[] charLiteral = new boolean[1]; |
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reader.startNewStream(XMLUtil.scanEntity(charLiteral, reader, |
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escapeChar, |
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entityResolver)); |
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if (charLiteral[0]) { |
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ch = reader.read(); |
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if (isEntityValue != null) { |
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isEntityValue[0] = true; |
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} |
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} else {
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ch = XMLUtil.read(reader, null, escapeChar, entityResolver);
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} |
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} |
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return ch;
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} |
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/**
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* Returns true if the data starts with <I>literal</I>.
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* Enough chars are read to determine this result.
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*
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* @param reader the reader
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* @param escapeChar the escape character (& or %)
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* @param entityResolver the entity resolver
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* @param literal the literal to check
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*
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* @throws java.io.IOException
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* if an error occurred reading the data
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*/
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static boolean checkLiteral(IXMLReader reader, |
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char escapeChar,
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IXMLEntityResolver entityResolver, |
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String literal)
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throws IOException, XMLParseException |
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{
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for (int i = 0; i < literal.length(); i++) { |
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char ch = XMLUtil.read(reader, null, escapeChar, entityResolver); |
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if (ch != literal.charAt(i)) {
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return false; |
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} |
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} |
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return true; |
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} |
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|
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/**
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* Throws an XMLParseException to indicate that an expected string is not
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* encountered.
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*
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* @param systemID the system ID from where the data came
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* @param lineNr the line number in the XML data where the
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* exception occurred.
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* @param expectedString the string that is expected
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*/
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static void errorExpectedInput(String systemID, |
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int lineNr,
|
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String expectedString)
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throws XMLParseException |
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{
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throw new XMLParseException(systemID, lineNr, |
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"Expected: " + expectedString);
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} |
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|
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|
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/**
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* Throws an XMLParseException to indicate that an entity could not be
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* resolved.
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*
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* @param systemID the system ID from where the data came
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* @param lineNr the line number in the XML data where the
|
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* exception occurred.
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* @param key the name of the entity
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*/
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static void errorInvalidEntity(String systemID, |
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int lineNr,
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String key)
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throws XMLParseException |
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{
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throw new XMLParseException(systemID, lineNr, |
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"Invalid entity: `&" + key + ";'"); |
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} |
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|
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|
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/**
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* Throws an XMLParseException to indicate that a string is not expected
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* at this point.
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*
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* @param systemID the system ID from where the data came
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* @param lineNr the line number in the XML data where the
|
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* exception occurred.
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* @param unexpectedString the string that is unexpected
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*/
|
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static void errorInvalidInput(String systemID, |
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int lineNr,
|
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String unexpectedString)
|
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throws XMLParseException |
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{
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throw new XMLParseException(systemID, lineNr, |
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"Invalid input: " + unexpectedString);
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} |
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|
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|
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/**
|
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* Throws an XMLParseException to indicate that the closing tag of an
|
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* element does not match the opening tag.
|
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*
|
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* @param systemID the system ID from where the data came
|
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* @param lineNr the line number in the XML data where the
|
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* exception occurred.
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* @param expectedName the name of the opening tag
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* @param wrongName the name of the closing tag
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*/
|
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static void errorWrongClosingTag(String systemID, |
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int lineNr,
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String expectedName,
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String wrongName)
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throws XMLParseException |
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{
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throw new XMLParseException(systemID, lineNr, |
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"Closing tag does not match opening tag: `"
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+ wrongName + "' != `" + expectedName
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+ "'");
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} |
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|
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|
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/**
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* Throws an XMLParseException to indicate that extra data is encountered
|
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* in a closing tag.
|
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*
|
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* @param systemID the system ID from where the data came
|
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* @param lineNr the line number in the XML data where the
|
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* exception occurred.
|
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*/
|
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static void errorClosingTagNotEmpty(String systemID, |
| 534 |
int lineNr)
|
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throws XMLParseException |
| 536 |
{
|
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throw new XMLParseException(systemID, lineNr, |
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"Closing tag must be empty");
|
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} |
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|
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|
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/**
|
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* Throws an XMLValidationException to indicate that an element is missing.
|
| 544 |
*
|
| 545 |
* @param systemID the system ID from where the data came
|
| 546 |
* @param lineNr the line number in the XML data where the
|
| 547 |
* exception occurred.
|
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* @param parentElementName the name of the offending element
|
| 549 |
* @param missingElementName the name of the offending attribute
|
| 550 |
*/
|
| 551 |
static void errorMissingElement(String systemID, |
| 552 |
int lineNr,
|
| 553 |
String parentElementName,
|
| 554 |
String missingElementName)
|
| 555 |
throws XMLValidationException
|
| 556 |
{
|
| 557 |
throw new XMLValidationException( |
| 558 |
XMLValidationException.MISSING_ELEMENT, |
| 559 |
systemID, lineNr, |
| 560 |
missingElementName, |
| 561 |
/*attributeName*/ null, |
| 562 |
/*attributeValue*/ null, |
| 563 |
"Element " + parentElementName
|
| 564 |
+ " expects to have a " + missingElementName);
|
| 565 |
} |
| 566 |
|
| 567 |
|
| 568 |
/**
|
| 569 |
* Throws an XMLValidationException to indicate that an element is
|
| 570 |
* unexpected.
|
| 571 |
*
|
| 572 |
* @param systemID the system ID from where the data came
|
| 573 |
* @param lineNr the line number in the XML data where the
|
| 574 |
* exception occurred.
|
| 575 |
* @param parentElementName the name of the parent attribute
|
| 576 |
* @param unexpectedElementName the name of the offending attribute
|
| 577 |
*/
|
| 578 |
static void errorUnexpectedElement(String systemID, |
| 579 |
int lineNr,
|
| 580 |
String parentElementName,
|
| 581 |
String unexpectedElementName)
|
| 582 |
throws XMLValidationException
|
| 583 |
{
|
| 584 |
throw new XMLValidationException( |
| 585 |
XMLValidationException.UNEXPECTED_ELEMENT, |
| 586 |
systemID, lineNr, |
| 587 |
unexpectedElementName, |
| 588 |
/*attributeName*/ null, |
| 589 |
/*attributeValue*/ null, |
| 590 |
"Unexpected " + unexpectedElementName + " in a " |
| 591 |
+ parentElementName); |
| 592 |
} |
| 593 |
|
| 594 |
|
| 595 |
/**
|
| 596 |
* Throws an XMLValidationException to indicate that an attribute is
|
| 597 |
* missing.
|
| 598 |
*
|
| 599 |
* @param systemID the system ID from where the data came
|
| 600 |
* @param lineNr the line number in the XML data where the
|
| 601 |
* exception occurred.
|
| 602 |
* @param elementName the name of the offending element
|
| 603 |
* @param attributeName the name of the offending attribute
|
| 604 |
*/
|
| 605 |
static void errorMissingAttribute(String systemID, |
| 606 |
int lineNr,
|
| 607 |
String elementName,
|
| 608 |
String attributeName)
|
| 609 |
throws XMLValidationException
|
| 610 |
{
|
| 611 |
throw new XMLValidationException( |
| 612 |
XMLValidationException.MISSING_ATTRIBUTE, |
| 613 |
systemID, lineNr, |
| 614 |
elementName, |
| 615 |
attributeName, |
| 616 |
/*attributeValue*/ null, |
| 617 |
"Element " + elementName + " expects an attribute named " |
| 618 |
+ attributeName); |
| 619 |
} |
| 620 |
|
| 621 |
|
| 622 |
/**
|
| 623 |
* Throws an XMLValidationException to indicate that an attribute is
|
| 624 |
* unexpected.
|
| 625 |
*
|
| 626 |
* @param systemID the system ID from where the data came
|
| 627 |
* @param lineNr the line number in the XML data where the
|
| 628 |
* exception occurred.
|
| 629 |
* @param elementName the name of the offending element
|
| 630 |
* @param attributeName the name of the offending attribute
|
| 631 |
*/
|
| 632 |
static void errorUnexpectedAttribute(String systemID, |
| 633 |
int lineNr,
|
| 634 |
String elementName,
|
| 635 |
String attributeName)
|
| 636 |
throws XMLValidationException
|
| 637 |
{
|
| 638 |
throw new XMLValidationException( |
| 639 |
XMLValidationException.UNEXPECTED_ATTRIBUTE, |
| 640 |
systemID, lineNr, |
| 641 |
elementName, |
| 642 |
attributeName, |
| 643 |
/*attributeValue*/ null, |
| 644 |
"Element " + elementName + " did not expect an attribute " |
| 645 |
+ "named " + attributeName);
|
| 646 |
} |
| 647 |
|
| 648 |
|
| 649 |
/**
|
| 650 |
* Throws an XMLValidationException to indicate that an attribute has an
|
| 651 |
* invalid value.
|
| 652 |
*
|
| 653 |
* @param systemID the system ID from where the data came
|
| 654 |
* @param lineNr the line number in the XML data where the
|
| 655 |
* exception occurred.
|
| 656 |
* @param elementName the name of the offending element
|
| 657 |
* @param attributeName the name of the offending attribute
|
| 658 |
* @param attributeValue the value of the offending attribute
|
| 659 |
*/
|
| 660 |
static void errorInvalidAttributeValue(String systemID, |
| 661 |
int lineNr,
|
| 662 |
String elementName,
|
| 663 |
String attributeName,
|
| 664 |
String attributeValue)
|
| 665 |
throws XMLValidationException
|
| 666 |
{
|
| 667 |
throw new XMLValidationException( |
| 668 |
XMLValidationException.ATTRIBUTE_WITH_INVALID_VALUE, |
| 669 |
systemID, lineNr, |
| 670 |
elementName, |
| 671 |
attributeName, |
| 672 |
attributeValue, |
| 673 |
"Invalid value for attribute " + attributeName);
|
| 674 |
} |
| 675 |
|
| 676 |
|
| 677 |
/**
|
| 678 |
* Throws an XMLValidationException to indicate that a #PCDATA element was
|
| 679 |
* missing.
|
| 680 |
*
|
| 681 |
* @param systemID the system ID from where the data came
|
| 682 |
* @param lineNr the line number in the XML data where the
|
| 683 |
* exception occurred.
|
| 684 |
* @param parentElementName the name of the offending element
|
| 685 |
*/
|
| 686 |
static void errorMissingPCData(String systemID, |
| 687 |
int lineNr,
|
| 688 |
String parentElementName)
|
| 689 |
throws XMLValidationException
|
| 690 |
{
|
| 691 |
throw new XMLValidationException( |
| 692 |
XMLValidationException.MISSING_PCDATA, |
| 693 |
systemID, lineNr, |
| 694 |
/*elementName*/ null, |
| 695 |
/*attributeName*/ null, |
| 696 |
/*attributeValue*/ null, |
| 697 |
"Missing #PCDATA in element " + parentElementName);
|
| 698 |
} |
| 699 |
|
| 700 |
|
| 701 |
/**
|
| 702 |
* Throws an XMLValidationException to indicate that a #PCDATA element was
|
| 703 |
* unexpected.
|
| 704 |
*
|
| 705 |
* @param systemID the system ID from where the data came
|
| 706 |
* @param lineNr the line number in the XML data where the
|
| 707 |
* exception occurred.
|
| 708 |
* @param parentElementName the name of the offending element
|
| 709 |
*/
|
| 710 |
static void errorUnexpectedPCData(String systemID, |
| 711 |
int lineNr,
|
| 712 |
String parentElementName)
|
| 713 |
throws XMLValidationException
|
| 714 |
{
|
| 715 |
throw new XMLValidationException( |
| 716 |
XMLValidationException.UNEXPECTED_PCDATA, |
| 717 |
systemID, lineNr, |
| 718 |
/*elementName*/ null, |
| 719 |
/*attributeName*/ null, |
| 720 |
/*attributeValue*/ null, |
| 721 |
"Unexpected #PCDATA in element " + parentElementName);
|
| 722 |
} |
| 723 |
|
| 724 |
|
| 725 |
/**
|
| 726 |
* Throws an XMLValidationException.
|
| 727 |
*
|
| 728 |
* @param systemID the system ID from where the data came
|
| 729 |
* @param lineNr the line number in the XML data where the
|
| 730 |
* exception occurred.
|
| 731 |
* @param message the message of the exception.
|
| 732 |
* @param elementName the name of the offending element
|
| 733 |
* @param attributeName the name of the offending attribute
|
| 734 |
* @param attributeValue the value of the offending attribute
|
| 735 |
*/
|
| 736 |
static void validationError(String systemID, |
| 737 |
int lineNr,
|
| 738 |
String message,
|
| 739 |
String elementName,
|
| 740 |
String attributeName,
|
| 741 |
String attributeValue)
|
| 742 |
throws XMLValidationException
|
| 743 |
{
|
| 744 |
throw new XMLValidationException( |
| 745 |
XMLValidationException.MISC_ERROR, |
| 746 |
systemID, lineNr, |
| 747 |
elementName, |
| 748 |
attributeName, |
| 749 |
attributeValue, |
| 750 |
message); |
| 751 |
} |
| 752 |
|
| 753 |
} |