pathmap.java

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        // prefix search
        int i=l-1;
        while((i=path.lastIndexOf('/',i-1))>=0)
        {
            entry=_prefixMap.getEntry(path,0,i);
            if (entry!=null)
                entries=LazyList.add(entries,entry.getValue());
        }
        
        // Prefix Default
        if (_prefixDefault!=null)
            entries=LazyList.add(entries,_prefixDefault);
        
        // Extension search
        i=0;
        while ((i=path.indexOf('.',i+1))>0)
        {
            entry=_suffixMap.getEntry(path,i+1,l-i-1);
            if (entry!=null)
                entries=LazyList.add(entries,entry.getValue());
        }

        // Default
        if (_default!=null)
        {
            // Optimization for just the default
            if (entries==null)
                return _defaultSingletonList;
            
            entries=LazyList.add(entries,_default);
        }
        
        return entries;
    }
    
    /* --------------------------------------------------------------- */
    /** Get all entries matched by the path.
     * Best match first.
     * @param path Path to match
     * @return List of Map.Entry instances key=pathSpec
     */
    public List getMatches(String path)
    {       
        return LazyList.getList(getLazyMatches(path));
    }

    /* --------------------------------------------------------------- */
    /** Return whether the path matches any entries in the PathMap, 
     * excluding the default entry 
     * @param path Path to match
     * @return Whether the PathMap contains any entries that match this
     */
    public boolean containsMatch(String path)
    {       
        Entry match = getMatch(path);
        return match!=null && !match.equals(_default);
    }

    
    
    /* --------------------------------------------------------------- */  
    public synchronized Object remove(Object pathSpec)
    {
        if (pathSpec!=null)
        {
            String spec=(String) pathSpec;
            if (spec.equals("/*"))
                _prefixDefault=null;
            else if (spec.endsWith("/*"))
            {
                _prefixMap.remove(spec.substring(0,spec.length()-2));
                _exactMap.remove(spec.substring(0,spec.length()-1));
                _exactMap.remove(spec.substring(0,spec.length()-2));
            }
            else if (spec.startsWith("*."))
                _suffixMap.remove(spec.substring(2));
            else if (spec.equals(URIUtil.SLASH))
            {
                _default=null;
                _defaultSingletonList=null;
            }
            else
                _exactMap.remove(spec);
        }
        return super.remove(pathSpec);
    }
    
    /* --------------------------------------------------------------- */
    public void clear()
    {
        _exactMap=new StringMap();
        _prefixMap=new StringMap();
        _suffixMap=new StringMap();
        _default=null;
        _defaultSingletonList=null;
        super.clear();
    }
    
    /* --------------------------------------------------------------- */
    /**
     * @return true if match.
     */
    public static boolean match(String pathSpec, String path)
        throws IllegalArgumentException
    {
        return match(pathSpec, path, false);
    }

    /* --------------------------------------------------------------- */
    /**
     * @return true if match.
     */
    public static boolean match(String pathSpec, String path, boolean noDefault)
    throws IllegalArgumentException
    {
        char c = pathSpec.charAt(0);
        if (c=='/')
        {
            if (!noDefault && pathSpec.length()==1 || pathSpec.equals(path))
                return true;
            
            if(isPathWildcardMatch(pathSpec, path))
                return true;
        }
        else if (c=='*')
            return path.regionMatches(path.length()-pathSpec.length()+1,
                                      pathSpec,1,pathSpec.length()-1);
        return false;
    }

    /* --------------------------------------------------------------- */
    private static boolean isPathWildcardMatch(String pathSpec, String path)
    {
        // For a spec of "/foo/*" match "/foo" , "/foo/..." but not "/foobar"
        int cpl=pathSpec.length()-2;
        if (pathSpec.endsWith("/*") && path.regionMatches(0,pathSpec,0,cpl))
        {
            if (path.length()==cpl || '/'==path.charAt(cpl))
                return true;
        }
        return false;
    }
    
    
    /* --------------------------------------------------------------- */
    /** Return the portion of a path that matches a path spec.
     * @return null if no match at all.
     */
    public static String pathMatch(String pathSpec, String path)
    {  
        char c = pathSpec.charAt(0);
        
        if (c=='/')
        {
            if (pathSpec.length()==1)
                return path;
        
            if (pathSpec.equals(path))
                return path;
            
            if (isPathWildcardMatch(pathSpec, path))
                return path.substring(0,pathSpec.length()-2);
        }
        else if (c=='*')
        {
            if (path.regionMatches(path.length()-(pathSpec.length()-1),
                                   pathSpec,1,pathSpec.length()-1))
                return path;
        }
        return null;
    }
    
    /* --------------------------------------------------------------- */
    /** Return the portion of a path that is after a path spec.
     * @return The path info string
     */
    public static String pathInfo(String pathSpec, String path)
    {
        char c = pathSpec.charAt(0);
        
        if (c=='/')
        {
            if (pathSpec.length()==1)
                return null;
            
            if (pathSpec.equals(path))
                return null;

            if (isPathWildcardMatch(pathSpec, path))
            {
                if (path.length()==pathSpec.length()-2)
                    return null;
                return path.substring(pathSpec.length()-2);
            }
        } 
        return null;
    }


    /* ------------------------------------------------------------ */
    /** Relative path.
     * @param base The base the path is relative to.
     * @param pathSpec The spec of the path segment to ignore.
     * @param path the additional path
     * @return base plus path with pathspec removed 
     */
    public static String relativePath(String base,
                                      String pathSpec,
                                      String path )
    {
        String info=pathInfo(pathSpec,path);
        if (info==null)
            info=path;

        if( info.startsWith( "./"))
            info = info.substring( 2);
        if( base.endsWith( URIUtil.SLASH))
            if( info.startsWith( URIUtil.SLASH))
                path = base + info.substring(1);
            else
                path = base + info;
        else
            if( info.startsWith( URIUtil.SLASH))
                path = base + info;
            else
                path = base + URIUtil.SLASH + info;
        return path;
    }
 
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    public static class Entry implements Map.Entry
    {
        private Object key;
        private Object value;
        private String mapped; 
        private transient String string;

        Entry(Object key, Object value)
        {
            this.key=key;
            this.value=value;
        }

        public Object getKey()
        {
            return key;
        }
        
        public Object getValue()
        {
            return value;
        }

        public Object setValue(Object o)
        {
            throw new UnsupportedOperationException();
        }

        public String toString()
        {
            if (string==null)
                string=key+"="+value;
            return string;
        }

        public String getMapped()
        {
            return mapped;
        }

        void setMapped(String mapped)
        {
            this.mapped = mapped;
        }
    }
}