/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.xerces.impl;
import java.io.IOException;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.util.XML11Char;
import org.apache.xerces.util.XMLChar;
import org.apache.xerces.util.XMLStringBuffer;
import org.apache.xerces.xni.XMLString;
import org.apache.xerces.xni.XNIException;
/**
* This class is responsible for scanning the declarations found
* in the internal and external subsets of a DTD in an XML document.
* The scanner acts as the sources for the DTD information which is
* communicated to the DTD handlers.
* <p>
* This component requires the following features and properties from the
* component manager that uses it:
* <ul>
* <li>http://xml.org/sax/features/validation</li>
* <li>http://apache.org/xml/features/scanner/notify-char-refs</li>
* <li>http://apache.org/xml/properties/internal/symbol-table</li>
* <li>http://apache.org/xml/properties/internal/error-reporter</li>
* <li>http://apache.org/xml/properties/internal/entity-manager</li>
* </ul>
*
* @xerces.internal
*
* @author Arnaud Le Hors, IBM
* @author Andy Clark, IBM
* @author Glenn Marcy, IBM
* @author Eric Ye, IBM
*
* @version $Id: XML11DTDScannerImpl.java 572055 2007-09-02 17:55:43Z mrglavas $
*/
public class XML11DTDScannerImpl
extends XMLDTDScannerImpl {
/** String buffer. */
private final XMLStringBuffer fStringBuffer = new XMLStringBuffer();
//
// Constructors
//
/** Default constructor. */
public XML11DTDScannerImpl() {super();} // <init>()
/** Constructor for he use of non-XMLComponentManagers. */
public XML11DTDScannerImpl(SymbolTable symbolTable,
XMLErrorReporter errorReporter, XMLEntityManager entityManager) {
super(symbolTable, errorReporter, entityManager);
}
//
// XMLDTDScanner methods
//
//
// XMLScanner methods
//
// NOTE: this is a carbon copy of the code in XML11DocumentScannerImpl;
// we need to override these methods in both places. Ah for
// multiple inheritance...
// This needs to be refactored!!! - NG
/**
* Scans public ID literal.
*
* [12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'"
* [13] PubidChar::= #x20 | #xD | #xA | [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]
*
* The returned string is normalized according to the following rule,
* from http://www.w3.org/TR/REC-xml#dt-pubid:
*
* Before a match is attempted, all strings of white space in the public
* identifier must be normalized to single space characters (#x20), and
* leading and trailing white space must be removed.
*
* @param literal The string to fill in with the public ID literal.
* @return True on success.
*
* <strong>Note:</strong> This method uses fStringBuffer, anything in it at
* the time of calling is lost.
*/
protected boolean scanPubidLiteral(XMLString literal)
throws IOException, XNIException
{
int quote = fEntityScanner.scanChar();
if (quote != '\'' && quote != '"') {
reportFatalError("QuoteRequiredInPublicID", null);
return false;
}
fStringBuffer.clear();
// skip leading whitespace
boolean skipSpace = true;
boolean dataok = true;
while (true) {
int c = fEntityScanner.scanChar();
// REVISIT: it could really only be \n or 0x20; all else is normalized, no? - neilg
if (c == ' ' || c == '\n' || c == '\r' || c == 0x85 || c == 0x2028) {
if (!skipSpace) {
// take the first whitespace as a space and skip the others
fStringBuffer.append(' ');
skipSpace = true;
}
}
else if (c == quote) {
if (skipSpace) {
// if we finished on a space let's trim it
fStringBuffer.length--;
}
literal.setValues(fStringBuffer);
break;
}
else if (XMLChar.isPubid(c)) {
fStringBuffer.append((char)c);
skipSpace = false;
}
else if (c == -1) {
reportFatalError("PublicIDUnterminated", null);
return false;
}
else {
dataok = false;
reportFatalError("InvalidCharInPublicID",
new Object[]{Integer.toHexString(c)});
}
}
return dataok;
}
/**
* Normalize whitespace in an XMLString converting all whitespace
* characters to space characters.
*/
protected void normalizeWhitespace(XMLString value) {
int end = value.offset + value.length;
for (int i = value.offset; i < end; ++i) {
int c = value.ch[i];
if (XMLChar.isSpace(c)) {
value.ch[i] = ' ';
}
}
}
/**
* Normalize whitespace in an XMLString converting all whitespace
* characters to space characters.
*/
protected void normalizeWhitespace(XMLString value, int fromIndex) {
int end = value.offset + value.length;
for (int i = value.offset + fromIndex; i < end; ++i) {
int c = value.ch[i];
if (XMLChar.isSpace(c)) {
value.ch[i] = ' ';
}
}
}
/**
* Checks whether this string would be unchanged by normalization.
*
* @return -1 if the value would be unchanged by normalization,
* otherwise the index of the first whitespace character which
* would be transformed.
*/
protected int isUnchangedByNormalization(XMLString value) {
int end = value.offset + value.length;
for (int i = value.offset; i < end; ++i) {
int c = value.ch[i];
if (XMLChar.isSpace(c)) {
return i - value.offset;
}
}
return -1;
}
// returns true if the given character is not
// valid with respect to the version of
// XML understood by this scanner.
protected boolean isInvalid(int value) {
return (!XML11Char.isXML11Valid(value));
} // isInvalid(int): boolean
// returns true if the given character is not
// valid or may not be used outside a character reference
// with respect to the version of XML understood by this scanner.
protected boolean isInvalidLiteral(int value) {
return (!XML11Char.isXML11ValidLiteral(value));
} // isInvalidLiteral(int): boolean
// returns true if the given character is
// a valid nameChar with respect to the version of
// XML understood by this scanner.
protected boolean isValidNameChar(int value) {
return (XML11Char.isXML11Name(value));
} // isValidNameChar(int): boolean
// returns true if the given character is
// a valid nameStartChar with respect to the version of
// XML understood by this scanner.
protected boolean isValidNameStartChar(int value) {
return (XML11Char.isXML11NameStart(value));
} // isValidNameStartChar(int): boolean
// returns true if the given character is
// a valid NCName character with respect to the version of
// XML understood by this scanner.
protected boolean isValidNCName(int value) {
return (XML11Char.isXML11NCName(value));
} // isValidNCName(int): boolean
// returns true if the given character is
// a valid high surrogate for a nameStartChar
// with respect to the version of XML understood
// by this scanner.
protected boolean isValidNameStartHighSurrogate(int value) {
return XML11Char.isXML11NameHighSurrogate(value);
} // isValidNameStartHighSurrogate(int): boolean
// note that, according to 4.3.4 of the XML 1.1 spec, XML 1.1
// documents may invoke 1.0 entities; thus either version decl (or none!)
// is allowed to appear in this context
protected boolean versionSupported(String version) {
return version.equals("1.1") || version.equals ("1.0");
} // versionSupported(String): boolean
// returns the error message key for unsupported
// versions of XML with respect to the version of
// XML understood by this scanner.
protected String getVersionNotSupportedKey () {
return "VersionNotSupported11";
} // getVersionNotSupportedKey: String
} // class XML11DTDScannerImpl
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