package org.apache.velocity.exception;
/*
* 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.
*/
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.velocity.runtime.log.Log;
import org.apache.velocity.runtime.parser.ParseException;
import org.apache.velocity.util.introspection.Info;
/**
* Application-level exception thrown when a resource of any type
* has a syntax or other error which prevents it from being parsed.
* <br>
* When this resource is thrown, a best effort will be made to have
* useful information in the exception's message. For complete
* information, consult the runtime log.
*
* @author <a href="mailto:[email protected]">Geir Magnusson Jr.</a>
* @author <a href="[email protected]">Henning P. Schmiedehausen</a>
* @version $Id: ParseErrorException.java 736638 2009-01-22 13:42:52Z byron $
*/
public class ParseErrorException extends VelocityException
{
/**
* Version Id for serializable
*/
private static final long serialVersionUID = -6665197935086306472L;
/**
* The column number of the parsing error, or -1 if not defined.
*/
private int columnNumber = -1;
/**
* The line number of the parsing error, or -1 if not defined.
*/
private int lineNumber = -1;
/**
* The name of the template containing the error, or null if not defined.
*/
private String templateName = "*unset*";
/**
* If applicable, contains the invalid syntax or reference that triggered this exception
*/
private String invalidSyntax;
/**
* If we modify the message, then we set this
*/
private String msg = null;
/**
* Create a ParseErrorException with the given message.
*
* @param exceptionMessage the error exception message
*/
public ParseErrorException(String exceptionMessage)
{
super(exceptionMessage);
}
private static final Pattern lexError = Pattern.compile("Lexical error.*TokenMgrError.*line (\\d+),.*column (\\d+)\\.(.*)");
/**
* Create a ParseErrorException with the given ParseException.
*
* @param pex the parsing exception
* @since 1.5
*/
public ParseErrorException(ParseException pex, String templName)
{
super(pex.getMessage());
if (templName != null) templateName = templName;
// Don't use a second C'tor, TemplateParseException is a subclass of
// ParseException...
if (pex instanceof ExtendedParseException)
{
ExtendedParseException xpex = (ExtendedParseException) pex;
columnNumber = xpex.getColumnNumber();
lineNumber = xpex.getLineNumber();
templateName = xpex.getTemplateName();
}
else
{
// We get here if the the Parser has thrown an exception. Unfortunately,
// the error message created is hard coded by javacc, so here we alter
// the error message, so that it is in our standard format.
Matcher match = lexError.matcher(pex.getMessage());
if (match.matches())
{
lineNumber = Integer.parseInt(match.group(1));
columnNumber = Integer.parseInt(match.group(2));
String restOfMsg = match.group(3);
msg = "Lexical error, " + restOfMsg + " at "
+ Log.formatFileString(templateName, lineNumber, columnNumber);
}
// ugly, ugly, ugly...
if (pex.currentToken != null && pex.currentToken.next != null)
{
columnNumber = pex.currentToken.next.beginColumn;
lineNumber = pex.currentToken.next.beginLine;
}
}
}
/**
* Create a ParseErrorException with the given ParseException.
*
* @param pex the parsing exception
* @since 1.5
*/
public ParseErrorException(VelocityException pex, String templName)
{
super(pex.getMessage());
if (templName != null) templateName = templName;
// Don't use a second C'tor, TemplateParseException is a subclass of
// ParseException...
if (pex instanceof ExtendedParseException)
{
ExtendedParseException xpex = (ExtendedParseException) pex;
columnNumber = xpex.getColumnNumber();
lineNumber = xpex.getLineNumber();
templateName = xpex.getTemplateName();
}
else if (pex.getWrappedThrowable() instanceof ParseException)
{
ParseException pex2 = (ParseException) pex.getWrappedThrowable();
if (pex2.currentToken != null && pex2.currentToken.next != null)
{
columnNumber = pex2.currentToken.next.beginColumn;
lineNumber = pex2.currentToken.next.beginLine;
}
}
}
/**
* Create a ParseErrorRuntimeException with the given message and info
*
* @param exceptionMessage the error exception message
* @param info an Info object with the current template info
* @since 1.5
*/
public ParseErrorException(String exceptionMessage, Info info)
{
super(exceptionMessage);
columnNumber = info.getColumn();
lineNumber = info.getLine();
templateName = info.getTemplateName();
}
/**
* Create a ParseErrorRuntimeException with the given message and info
*
* @param exceptionMessage the error exception message
* @param info an Info object with the current template info
* @param invalidSyntax the invalid syntax or reference triggering this exception
* @since 1.5
*/
public ParseErrorException(String exceptionMessage,
Info info, String invalidSyntax)
{
super(exceptionMessage);
columnNumber = info.getColumn();
lineNumber = info.getLine();
templateName = info.getTemplateName();
this.invalidSyntax = invalidSyntax;
}
/**
* Return the column number of the parsing error, or -1 if not defined.
*
* @return column number of the parsing error, or -1 if not defined
* @since 1.5
*/
public int getColumnNumber()
{
return columnNumber;
}
/**
* Return the line number of the parsing error, or -1 if not defined.
*
* @return line number of the parsing error, or -1 if not defined
* @since 1.5
*/
public int getLineNumber()
{
return lineNumber;
}
/**
* Return the name of the template containing the error, or null if not
* defined.
*
* @return the name of the template containing the parsing error, or null
* if not defined
* @since 1.5
*/
public String getTemplateName()
{
return templateName;
}
/**
* Return the invalid syntax or reference that triggered this error, or null
* if not defined.
*
* @return Return the invalid syntax or reference that triggered this error, or null
* if not defined
* @since 1.5
*/
public String getInvalidSyntax()
{
return invalidSyntax;
}
/**
* Return our custum message if we have one, else return the default message
*/
public String getMessage()
{
if (msg != null) return msg;
return super.getMessage();
}
}
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