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/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.run.xml;
import com.tangosol.dev.compiler.CompilerException;
import com.tangosol.dev.compiler.CompilerErrorInfo;
import com.tangosol.dev.compiler.ParsePosition;
import com.tangosol.dev.compiler.Script;
import com.tangosol.dev.compiler.Token;
import com.tangosol.dev.compiler.Tokenizer;
import com.tangosol.util.Base;
import com.tangosol.util.ClassHelper;
import com.tangosol.util.Dequeue;
import com.tangosol.util.ErrorList;
import com.tangosol.util.Resources;
import java.io.EOFException;
import java.io.IOException;
import java.util.NoSuchElementException;
/**
* Converts a character stream (Script object) into XML tokens.
*
* @version 1.00, 07/16/01
* @author Cameron Purdy
*/
public class XmlTokenizer
extends Base
implements Tokenizer, ErrorList.Constants
{
// ----- constructors --------------------------------------------------
/**
* (Default) Constructs an XML Tokenizer.
*/
public XmlTokenizer()
{
}
/**
* Constructs an XML Tokenizer.
*
* @param s the string which contains the XML script to tokenize
* @param errlist the error list which the Tokenizer will log to
*/
public XmlTokenizer(String s, ErrorList errlist)
throws CompilerException
{
this(new XmlScript(s), errlist);
}
/**
* Constructs a Tokenizer.
*
* @param script the script object which contains the XML script
* @param errlist the error list which the Tokenizer will log to
*/
public XmlTokenizer(Script script, ErrorList errlist)
throws CompilerException
{
setScript(script, errlist);
}
// ----- Tokenizer interface ------------------------------------------------
/**
* Initializes the Tokenizer. This method must be called exactly
* one time to initialize the Tokenizer object.
*
* @param script the Script to tokenize
* @param errlist the ErrorList to log errors to
*
* @exception NoSuchElementException If the tokens are exhausted
* @exception CompilerException If a lexical error occurs that should stop
* the compilation process
*/
public void setScript(Script script, ErrorList errlist)
throws CompilerException
{
// assert: this method must be called only one time
if (m_script != null)
{
throw new IllegalStateException();
}
m_errlist = errlist;
m_script = script;
m_dq = new Dequeue();
// eat up to the next token
eatFluff();
}
/**
* Checks for more tokens in the script.
*
* @return true if tokenizing of the script is incomplete.
*/
public boolean hasMoreTokens()
{
// first check for any tokens that were "put back"
if (m_dq.hasMoreElements())
{
return true;
}
// check if there is more to parse
return m_script.hasMoreChars();
}
/**
* Eats and returns the next token from the script.
*
* @return the next token
*
* @exception NoSuchElementException If the tokens are exhausted
* @exception CompilerException If a lexical error occurs that should stop
* the compilation process
*/
public Token nextToken()
throws CompilerException
{
Token tok;
if (m_dq.hasMoreElements())
{
tok = (Token) m_dq.nextElement();
}
else if (m_script.hasMoreChars())
{
tok = eatToken();
eatFluff();
}
else
{
throw new NoSuchElementException();
}
return tok;
}
/**
* Regurgitates the last eaten token so that the next call to nextToken
* will return the same token that was returned by the most recent call
* to nextToken. (This method can be called more than once to regurgitate
* multiple tokens.)
*
* @exception NoSuchElementException an attempt to back up past the
* beginning of the script -or- the dequeue was not constructed
* large enough to hold the number of entries that have been
* put back.
*/
public void putBackToken(com.tangosol.dev.compiler.Token tok)
{
m_dq.putBackElement(tok);
}
/**
* Returns an object that can be used to restore the current position
* in the script. This method is similar to the mark method of the
* Java stream classes, but by returning an object that identifies the
* position, multiple positions can be saved and later returned to.
*
* @return an object which identifies the current position within the
* script
*/
public ParsePosition savePosition()
{
Position pos = new Position();
pos.toker = this;
pos.dq = (Dequeue) m_dq.clone();
pos.scriptpos = m_script.savePosition();
return pos;
}
/**
* Restores the current parsing position that was returned from
* the savePosition method.
*
* @param parsepos The return value from a previous call to savePosition
*/
public void restorePosition(ParsePosition parsepos)
{
Position pos = (Position) parsepos;
if (pos.toker != this)
{
throw new IllegalArgumentException("Unknown ParsePosition object!");
}
m_script.restorePosition(pos.scriptpos);
m_dq = pos.dq;
}
// ----- script parsing -------------------------------------------------
/**
* Eats whitespace and comments until the next XML token is encountered
* or the end of the string is reached, whichever comes first.
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected void eatFluff()
throws CompilerException
{
Script script = m_script;
try
{
while (script.hasMoreChars())
{
char ch = script.nextChar();
switch (ch)
{
// XML 1.0 spec 2nd ed section 2.3:
// S ::= (#x20 | #x9 | #xD | #xA)+
case 0x20:
case 0x09:
case 0x0D:
case 0x0A:
break;
// a token has been encountered
default:
script.putBackChar();
return;
}
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null,
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Eats the largest token possible, returning a Token interface which
* describes the token.
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatToken()
throws CompilerException
{
switch (m_nCtx)
{
case CTX_OUTSIDE:
return eatOutside();
case CTX_XMLDECL:
return eatXmlDecl();
case CTX_DOCTYPE:
return eatDocType();
case CTX_COMMENT:
case CTX_DTD_COMMENT:
return eatComment();
case CTX_PI:
return eatPi();
case CTX_ELEMENT:
return eatElement();
case CTX_DTD:
return eatDtd();
default:
throw internalError();
}
}
/**
* Eat a token from the "outside of markup" context.
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatOutside()
throws CompilerException
{
Script script = m_script;
int iLine = script.getLine();
int ofInLine = script.getOffset();
try
{
if (script.nextChar() == '<')
{
// could be "");
String sData = script.subScript(pos).toString();
script.nextChar(); // ]
script.nextChar(); // ]
script.nextChar(); // >
return new XmlToken(XmlToken.CAT_LITERAL, XmlToken.LIT_CHARDATA,
XmlToken.CHARDATA_RAW, sData, sData, iLine,
ofInLine, script.getOffset() - ofInLine);
case 'D':
script.putBackChar();
match("DOCTYPE");
m_nCtx = CTX_DOCTYPE;
return new XmlToken(XmlToken.TOK_DOCTYPE_START, iLine, ofInLine, script.getOffset() - ofInLine);
default:
// pretend we were looking for a comment
// (easier than duplicating the error reporting)
script.putBackChar();
match('-'); // will throw CompilerException
throw internalError();
}
default:
// assume it is an element
script.putBackChar();
m_nCtx = CTX_ELEMENT;
return new XmlToken(XmlToken.TOK_ELEMENT_START, iLine, ofInLine, script.getOffset() - ofInLine);
}
}
else
{
// character data - scan up to '<'
script.putBackChar();
ParsePosition pos = script.savePosition();
while (script.nextChar() != '<')
{
}
script.putBackChar();
String sData = script.subScript(pos).toString();
return new XmlToken(XmlToken.CAT_LITERAL, XmlToken.LIT_CHARDATA,
XmlToken.CHARDATA, sData, sData, iLine,
ofInLine, script.getOffset() - ofInLine);
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Eat a token from the XML declaration section.
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatXmlDecl()
throws CompilerException
{
// use element-context parsing
return eatElement();
}
/**
* Eat a token from the DOCTYPE section.
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatDocType()
throws CompilerException
{
// check for embedded DTD
Script script = m_script;
int iLine = script.getLine();
int ofInLine = script.getOffset();
try
{
if (script.nextChar() == '[')
{
m_nCtx = CTX_DTD;
return new XmlToken(XmlToken.TOK_DTD_DECL_START,
iLine, ofInLine, script.getOffset() - ofInLine);
}
script.putBackChar();
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
// use element-context parsing
return eatElement();
}
/**
* Eat a token from the DOCTYPE's embedded DTD section.
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatDtd()
throws CompilerException
{
Script script = m_script;
int iLine = script.getLine();
int ofInLine = script.getOffset();
try
{
char ch = script.nextChar();
switch (ch)
{
case '<':
{
match('!');
if (peek('-'))
{
match('-');
m_nCtx = CTX_DTD_COMMENT;
return new XmlToken(XmlToken.TOK_COMMENT_START, iLine, ofInLine, script.getOffset() - ofInLine);
}
Token tokName = eatName();
String sName = tokName.getText();
scan('>');
match('>');
if (sName.equals("ELEMENT"))
{
return new XmlToken(XmlToken.TOK_DTD_ELEMENT,
iLine, ofInLine, script.getOffset() - ofInLine);
}
else if (sName.equals("ATTLIST"))
{
return new XmlToken(XmlToken.TOK_DTD_ATTLIST,
iLine, ofInLine, script.getOffset() - ofInLine);
}
else if (sName.equals("ENTITY"))
{
return new XmlToken(XmlToken.TOK_DTD_ENTITY,
iLine, ofInLine, script.getOffset() - ofInLine);
}
else if (sName.equals("NOTATION"))
{
return new XmlToken(XmlToken.TOK_DTD_NOTATION,
iLine, ofInLine, script.getOffset() - ofInLine);
}
else
{
logError(ERROR, ERR_XML_FORMAT, null, iLine, ofInLine, 0);
throw new CompilerException();
}
}
case '%':
{
// %name;
Token tokName = eatName();
String sName = tokName.getText();
match(';');
return new XmlToken(XmlToken.CAT_DTDSTUFF, XmlToken.NONE,
XmlToken.DTD_DECLSEP, sName, sName, iLine,
ofInLine, script.getOffset() - ofInLine);
}
default:
script.putBackChar();
match(']');
m_nCtx = CTX_DOCTYPE;
return new XmlToken(XmlToken.TOK_DTD_DECL_STOP,
iLine, ofInLine, script.getOffset() - ofInLine);
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Eat a token from a comment.
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatComment()
throws CompilerException
{
// read until "-->" found
Script script = m_script;
ParsePosition pos = script.savePosition();
int iLine = script.getLine();
int ofInLine = script.getOffset();
boolean fFirst = true;
try
{
while (true)
{
switch (script.nextChar())
{
case '-':
if (script.nextChar() == '-')
{
if (script.nextChar() == '>')
{
if (fFirst)
{
// return the end-of-commment
m_nCtx = (m_nCtx == CTX_DTD_COMMENT ? CTX_DTD : CTX_OUTSIDE);
return new XmlToken(XmlToken.TOK_COMMENT_STOP,
iLine, ofInLine, script.getOffset() - ofInLine);
}
else
{
// restore the end of comment
script.putBackChar();
script.putBackChar();
script.putBackChar();
String sComment = script.subScript(pos).toString();
return new XmlToken(XmlToken.CAT_LITERAL, XmlToken.LIT_COMMENT,
XmlToken.COMMENT, null, sComment, iLine,
ofInLine, script.getOffset() - ofInLine);
}
}
}
case '\r':
case '\n':
{
// restore newline character
script.putBackChar();
String sComment = script.subScript(pos).toString();
return new XmlToken(XmlToken.CAT_LITERAL, XmlToken.LIT_COMMENT,
XmlToken.COMMENT, null, sComment, iLine,
ofInLine, script.getOffset() - ofInLine);
}
}
fFirst = false;
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Eat a token from a processing instruction (PI).
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatPi()
throws CompilerException
{
Token tokName = eatName();
if (tokName.getText().equals("xml"))
{
// switch over to XML-specific PI
m_nCtx = CTX_XMLDECL;
}
else
{
eatFluff();
// eat body
Script script = m_script;
ParsePosition pos = script.savePosition();
int iLine = script.getLine();
int ofInLine = script.getOffset();
scan("?>");
String sBody = script.subScript(pos).toString();
if (sBody.length() > 0)
{
// queue body
m_dq.addElement(new XmlToken(XmlToken.CAT_LITERAL,
XmlToken.LIT_CHARDATA, XmlToken.CHARDATA_RAW,
null, sBody, iLine, ofInLine,
script.getOffset() - ofInLine));
}
// queue closing separator
iLine = script.getLine();
ofInLine = script.getOffset();
try
{
script.nextChar();
script.nextChar();
}
catch (IOException e)
{
throw internalError();
}
m_dq.addElement(new XmlToken(XmlToken.TOK_PI_STOP,
iLine, ofInLine, script.getOffset() - ofInLine));
m_nCtx = CTX_OUTSIDE;
}
return tokName;
}
/**
* Eat a token from an element.
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatElement()
throws CompilerException
{
Script script = m_script;
int iLine = script.getLine();
int ofInLine = script.getOffset();
try
{
char ch = script.nextChar();
switch (ch)
{
// "?>" is supported here because PI and XMLDECL delegate
// to this method for parsing
case '?':
match('>');
m_nCtx = CTX_OUTSIDE;
return new XmlToken(XmlToken.TOK_PI_STOP,
iLine, ofInLine, script.getOffset() - ofInLine);
case '=':
return new XmlToken(XmlToken.TOK_EQUALS,
iLine, ofInLine, script.getOffset() - ofInLine);
case '\'':
case '\"':
{
// scan for closing quote (ch)
ParsePosition pos = script.savePosition();
scan(ch);
String sLit = script.subScript(pos).toString();
match(ch);
return new XmlToken(XmlToken.CAT_LITERAL,
XmlToken.LIT_QUOTED, XmlToken.LITERAL,
null, sLit, iLine, ofInLine,
script.getOffset() - ofInLine);
}
case '/':
match('>');
m_nCtx = CTX_OUTSIDE;
return new XmlToken(XmlToken.TOK_EMPTY_STOP,
iLine, ofInLine, script.getOffset() - ofInLine);
case '>':
m_nCtx = CTX_OUTSIDE;
return new XmlToken(XmlToken.TOK_ELEMENT_STOP,
iLine, ofInLine, script.getOffset() - ofInLine);
default:
script.putBackChar();
return eatName();
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Eat a name token.
*
* @return the next Token
*
* @exception CompilerException If a lexical error is encountered which
* should stop compilation, like an unexpected end-of-file
*/
protected Token eatName()
throws CompilerException
{
Script script = m_script;
int iLine = script.getLine();
int ofInLine = script.getOffset();
try
{
StringBuffer sb = new StringBuffer();
char ch = script.nextChar();
if (!isNameStartChar(ch))
{
int ofNext = script.getOffset();
script.putBackChar();
logError(ERROR, ERR_XML_FORMAT, null,
iLine, ofInLine, ofNext - ofInLine);
throw new CompilerException();
}
sb.append(ch);
while (isNameChar(ch = script.nextChar()))
{
sb.append(ch);
}
script.putBackChar();
String sName = sb.toString();
return new XmlToken(XmlToken.CAT_NAME, XmlToken.NONE,
XmlToken.NAME, null, sName, iLine,
ofInLine, script.getOffset() - ofInLine);
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Helper: Is the passed character a starting character for an XML name?
*/
protected static boolean isNameStartChar(char ch)
{
// close enough (checking for the most probable first)
return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
ch == '_' || ch == ':' || Character.isUnicodeIdentifierStart(ch);
}
/**
* Helper: Is the passed character a valid character in an XML name?
*/
protected static boolean isNameChar(char ch)
{
// close enough (checking for the most probable first)
return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
ch == '_' || ch == ':' || ch == '-' || ch == '.' || Character.isUnicodeIdentifierPart(ch);
}
// ----- helpers --------------------------------------------------------
/**
* Peek for the specified character in the data being streamed from the
* Script object. Advance past if found. Otherwise return false.
*
* @param ch the character to peek
*
* @return true if peek found it, otherwise false
*
* @exception CompilerException
*/
protected boolean peek(char ch)
throws CompilerException
{
Script script = m_script;
try
{
char chActual = script.nextChar();
if (ch == chActual)
{
return true;
}
else
{
script.putBackChar();
return false;
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Match the specified character in the data being streamed from the
* Script object.
*
* @param ch the character to match
*
* @exception CompilerException
*/
protected void match(char ch)
throws CompilerException
{
Script script = m_script;
try
{
char chActual = script.nextChar();
if (ch != chActual)
{
int ofNext = script.getOffset();
script.putBackChar();
logError(ERROR, ERR_CHAR_EXPECTED, new String[]
{toCharEscape(ch), toCharEscape(chActual)},
script.getLine(), script.getOffset(),
ofNext - script.getOffset());
script.nextChar();
throw new CompilerException();
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Match the specified String in the data being streamed from the
* Script object.
*
* @param s the String to match
*
* @exception CompilerException
*/
protected void match(String s)
throws CompilerException
{
char[] ach = s.toCharArray();
int cch = ach.length;
Script script = m_script;
try
{
for (int of = 0; of < cch; ++of)
{
char chActual = script.nextChar();
if (ach[of] != chActual)
{
int ofNext = script.getOffset();
script.putBackChar();
logError(ERROR, ERR_CHAR_EXPECTED, new String[]
{toCharEscape(ach[of]), toCharEscape(chActual)},
script.getLine(), script.getOffset(),
ofNext - script.getOffset());
script.nextChar();
throw new CompilerException();
}
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Match one whitespace character.
*
* @exception CompilerException
*/
protected void matchWhitespace()
throws CompilerException
{
try
{
char ch = m_script.nextChar();
switch (ch)
{
// XML 1.0 spec 2nd ed section 2.3:
// S ::= (#x20 | #x9 | #xD | #xA)+
case 0x20:
case 0x09:
case 0x0D:
case 0x0A:
return;
default:
// easy way to log an error for no whitespace
m_script.putBackChar();
match(' ');
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null,
m_script.getLine(), m_script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
m_script.getLine(), m_script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Scan until the specified String is encountered.
*
* @param ch the character to scan for
*
* @exception CompilerException
*/
protected void scan(char ch)
throws CompilerException
{
Script script = m_script;
try
{
while (true)
{
if (script.nextChar() == ch)
{
script.putBackChar();
return;
}
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
/**
* Scan until the specified String is encountered.
*
* @param s the String to scan for
*
* @exception CompilerException
*/
protected void scan(String s)
throws CompilerException
{
char[] ach = s.toCharArray();
int cch = ach.length;
int chSentry = ach[0];
Script script = m_script;
try
{
next: while (true)
{
if (script.nextChar() == chSentry)
{
// determine if the entire search string has been found
boolean fFound = true;
int cTested = 1;
for (int of = 1; of < cch; ++of)
{
fFound = script.nextChar() == ach[of];
++cTested;
if (!fFound)
{
break;
}
}
// restore the search string if it were found; otherwise
// restore everything but the sentry character (to avoid
// finding the same one again)
for (int i = 0, c = fFound ? cTested : cTested - 1; i < c; ++i)
{
script.putBackChar();
}
if (fFound)
{
break next;
}
}
}
}
catch (EOFException e)
{
logError(ERROR, ERR_UNEXPECTED_EOF, null, script.getLine(),
script.getOffset(), 0);
throw new CompilerException();
}
catch (IOException e)
{
logError(ERROR, ERR_UNEXPECTED_IO, new String[] {e.toString()},
script.getLine(), script.getOffset(), 0);
throw new CompilerException();
}
}
// ----- error handling -------------------------------------------------
/**
* Logs an internal error and throws a CompilerException.
*
* @exception CompilerException Thrown unconditionally
*/
protected CompilerException internalError()
throws CompilerException
{
logError(FATAL, ERR_INTERNAL, null, m_script.getLine(), m_script.getOffset(), 0);
throw new CompilerException();
}
/**
* Logs the passed error in the error list.
*
* @param nSeverity Severity of the error as defined by ErrorList.Constants
* @param sCode Error code, as defined by the class logging the error
* @param asParams Replaceable parameters for the error message
* @param iLine Line number where the error was detected
* @param ofInLine Offset of the error within the line
* @param cchText Length of the text which caused the error
*
* @exception CompilerException If the error list overflows.
*/
protected void logError(int nSeverity, String sCode, String[] asParams, int iLine, int ofInLine, int cchText)
throws CompilerException
{
try
{
m_errlist.add(new CompilerErrorInfo(nSeverity, sCode, RESOURCES,
asParams, iLine, ofInLine, cchText));
}
catch (ErrorList.OverflowException e)
{
throw new CompilerException();
}
}
// ----- inner classes --------------------------------------------------
/**
* Stores all information required to later restore the current position in
* the script.
*/
class Position
implements ParsePosition
{
Tokenizer toker;
Dequeue dq;
ParsePosition scriptpos;
}
// ----- error codes ----------------------------------------------------
public static final String ERR_INTERNAL = "XT-001";
public static final String ERR_UNEXPECTED_EOF = "XT-002";
public static final String ERR_UNEXPECTED_IO = "XT-003";
public static final String ERR_XML_FORMAT = "XT-004";
public static final String ERR_CHAR_EXPECTED = "XT-005";
/**
* The package resources.
*/
public static final Resources RESOURCES =
ClassHelper.getPackageResources("com.tangosol.run.xml.");
// ----- constants ------------------------------------------------------
private static final int CTX_OUTSIDE = 0;
private static final int CTX_XMLDECL = 1;
private static final int CTX_DOCTYPE = 2;
private static final int CTX_COMMENT = 3;
private static final int CTX_PI = 4;
private static final int CTX_ELEMENT = 5;
private static final int CTX_CHARDATA = 6;
private static final int CTX_DTD = 7;
private static final int CTX_DTD_COMMENT= 8;
// ----- data members ---------------------------------------------------
/**
* Context-sensitive parsing indicator.
*/
private int m_nCtx;
/**
* The script to parse.
*/
private Script m_script;
/**
* The "put back" queue.
*/
private Dequeue m_dq;
/**
* The error list to log to.
*/
private ErrorList m_errlist;
}
