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//
// ========================================================================
// Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.server.pathmap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexPathSpec extends PathSpec
{
protected Pattern pattern;
protected RegexPathSpec()
{
super();
}
public RegexPathSpec(String regex)
{
super.pathSpec = regex;
boolean inGrouping = false;
this.pathDepth = 0;
this.specLength = pathSpec.length();
// build up a simple signature we can use to identify the grouping
StringBuilder signature = new StringBuilder();
for (char c : pathSpec.toCharArray())
{
switch (c)
{
case '[':
inGrouping = true;
break;
case ']':
inGrouping = false;
signature.append('g'); // glob
break;
case '*':
signature.append('g'); // glob
break;
case '/':
if (!inGrouping)
{
this.pathDepth++;
}
break;
default:
if (!inGrouping)
{
if (Character.isLetterOrDigit(c))
{
signature.append('l'); // literal (exact)
}
}
break;
}
}
this.pattern = Pattern.compile(pathSpec);
// Figure out the grouping based on the signature
String sig = signature.toString();
if (Pattern.matches("^l*$",sig))
{
this.group = PathSpecGroup.EXACT;
}
else if (Pattern.matches("^l*g+",sig))
{
this.group = PathSpecGroup.PREFIX_GLOB;
}
else if (Pattern.matches("^g+l+$",sig))
{
this.group = PathSpecGroup.SUFFIX_GLOB;
}
else
{
this.group = PathSpecGroup.MIDDLE_GLOB;
}
}
public Matcher getMatcher(String path)
{
return this.pattern.matcher(path);
}
@Override
public String getPathInfo(String path)
{
// Path Info only valid for PREFIX_GLOB types
if (group == PathSpecGroup.PREFIX_GLOB)
{
Matcher matcher = getMatcher(path);
if (matcher.matches())
{
if (matcher.groupCount() >= 1)
{
String pathInfo = matcher.group(1);
if ("".equals(pathInfo))
{
return "/";
}
else
{
return pathInfo;
}
}
}
}
return null;
}
@Override
public String getPathMatch(String path)
{
Matcher matcher = getMatcher(path);
if (matcher.matches())
{
if (matcher.groupCount() >= 1)
{
int idx = matcher.start(1);
if (idx > 0)
{
if (path.charAt(idx - 1) == '/')
{
idx--;
}
return path.substring(0,idx);
}
}
return path;
}
return null;
}
public Pattern getPattern()
{
return this.pattern;
}
@Override
public String getRelativePath(String base, String path)
{
// TODO Auto-generated method stub
return null;
}
@Override
public boolean matches(final String path)
{
int idx = path.indexOf('?');
if (idx >= 0)
{
// match only non-query part
return getMatcher(path.substring(0,idx)).matches();
}
else
{
// match entire path
return getMatcher(path).matches();
}
}
}
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