/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.config.types;
import com.caucho.config.ConfigException;
import com.caucho.util.CharBuffer;
import com.caucho.util.L10N;
import javax.annotation.PostConstruct;
import java.util.logging.Logger;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/**
* Abstract type building a path pattern. The pattern follows ant.
*/
public class PathPatternType {
static final L10N L = new L10N(PathPatternType.class);
static final Logger log = Logger.getLogger(PathPatternType.class.getName());
private Pattern _pattern;
public PathPatternType()
{
}
public PathPatternType(String pattern)
throws ConfigException, PatternSyntaxException
{
setName(pattern);
}
/**
* Sets the pattern name.
*/
public void setName(String pattern)
throws ConfigException, PatternSyntaxException
{
CharBuffer cb = new CharBuffer();
cb.append("^");
int i = 0;
int length = pattern.length();
while (i < length && pattern.charAt(i) == '/')
i++;
for (; i < length; i++) {
char ch = pattern.charAt(i);
if (ch == '/')
cb.append('/');
else if (ch != '*')
cb.append(ch);
else if (length <= i + 1 || pattern.charAt(i + 1) != '*')
cb.append("[^/]*");
else if (i > 0 && pattern.charAt(i - 1) != '/')
throw new ConfigException(L.l("'{0}' is an invalid pattern at '**'",
pattern));
else if (i + 2 < length && pattern.charAt(i + 2) == '/') {
cb.append("([^/]*/)*");
i += 2;
}
else if (i + 2 < length)
throw new ConfigException(L.l("'{0}' is an invalid pattern at '**'",
pattern));
else {
cb.append(".*");
i++;
}
}
cb.append("$");
_pattern = Pattern.compile(cb.toString());
}
/**
* Sets the pattern name.
*/
public void addText(String text)
throws ConfigException, PatternSyntaxException
{
text = text.trim();
if (! text.equals(""))
setName(text);
}
/**
* initialize the pattern.
*/
@PostConstruct
public void init()
throws ConfigException
{
if (_pattern == null)
throw new ConfigException(L.l("pattern requires 'name' attribute."));
}
/**
* Check for a match.
*/
public boolean isMatch(String path)
{
return _pattern.matcher(path).matches();
}
public String toString()
{
return "PathPatternType[" + _pattern.pattern() + "]";
}
}