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package org.apache.velocity.runtime.directive;
/*
* 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 org.apache.velocity.exception.ExtendedParseException;
import org.apache.velocity.runtime.parser.ParseException;
import org.apache.velocity.runtime.parser.Token;
import org.apache.velocity.util.StringUtils;
/**
* Exception to indicate problem happened while constructing #macro()
*
* For internal use in parser - not to be passed to app level
*
* @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
* @author <a href="hps@intermeta.de">Henning P. Schmiedehausen</a>
* @version $Id$
*/
public class MacroParseException
extends ParseException
implements ExtendedParseException
{
private final String templateName;
/**
* Version Id for serializable
*/
private static final long serialVersionUID = -4985224672336070689L;
/**
* @param msg
* @param templateName
* @param currentToken
*/
public MacroParseException(final String msg, final String templateName, final Token currentToken)
{
super(msg + " at ");
this.currentToken = currentToken;
this.templateName = templateName;
}
/**
* returns the Template name where this exception occured.
* @return The Template name where this exception occured.
* @since 1.5
*/
@Override
public String getTemplateName()
{
return templateName;
}
/**
* returns the line number where this exception occured.
* @return The line number where this exception occured.
* @since 1.5
*/
@Override
public int getLineNumber()
{
if ((currentToken != null) && (currentToken.next != null))
{
return currentToken.next.beginLine;
}
else if (currentToken != null)
{
return currentToken.beginLine;
}
else
{
return -1;
}
}
/**
* returns the column number where this exception occured.
* @return The column number where this exception occured.
* @since 1.5
*/
@Override
public int getColumnNumber()
{
if ((currentToken != null) && (currentToken.next != null))
{
return currentToken.next.beginColumn;
}
else if (currentToken != null)
{
return currentToken.beginColumn;
}
else
{
return -1;
}
}
/**
* This method has the standard behavior when this object has been
* created using the standard constructors. Otherwise, it uses
* "currentToken" and "expectedTokenSequences" to generate a parse
* error message and returns it. If this object has been created
* due to a parse error, and you do not catch it (it gets thrown
* from the parser), then this method is called during the printing
* of the final stack trace, and hence the correct error message
* gets displayed.
* @return the current message.
* @since 1.5
*/
@Override
public String getMessage()
{
if (!specialConstructor)
{
StringBuilder sb = new StringBuilder(super.getMessage());
appendTemplateInfo(sb);
return sb.toString();
}
int maxSize = 0;
StringBuilder expected = new StringBuilder();
for (int[] expectedTokenSequence : expectedTokenSequences)
{
if (maxSize < expectedTokenSequence.length)
{
maxSize = expectedTokenSequence.length;
}
for (int i : expectedTokenSequence)
{
expected.append(tokenImage[i]).append(" ");
}
if (expectedTokenSequence[expectedTokenSequence.length - 1] != 0)
{
expected.append("...");
}
expected.append(eol).append(" ");
}
StringBuilder retval = new StringBuilder("Encountered \"");
Token tok = currentToken.next;
for (int i = 0; i < maxSize; i++)
{
if (i != 0)
{
retval.append(" ");
}
if (tok.kind == 0)
{
retval.append(tokenImage[0]);
break;
}
retval.append(add_escapes(tok.image));
tok = tok.next;
}
retval.append("\"");
appendTemplateInfo(retval);
if (expectedTokenSequences.length == 1)
{
retval.append("Was expecting:").append(eol).append(" ");
}
else
{
retval.append("Was expecting one of:").append(eol).append(" ");
}
// avoid JDK 1.3 StringBuffer.append(Object o) vs 1.4 StringBuffer.append(StringBuffer sb) gotcha.
retval.append(expected.toString());
return retval.toString();
}
/**
* @param sb
* @since 1.5
*/
protected void appendTemplateInfo(final StringBuilder sb)
{
sb.append(StringUtils.formatFileString(getTemplateName(), getLineNumber(), getColumnNumber()));
sb.append(eol);
}
}
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