reluri.java

Jena推理机

            LogFactory.getLog(RelURI.class).warn("\nException in Java library: "+ex.getMessage()+"\nresolve("+rel.toString()+", "+base.toString()+")") ;
            throw ex ;
        }
    }
    
    /** Create resolve a URI against the global base.
     *  Returns null if the result is not absolute. 
     *  @param relURI
     */
    
    static public String resolve(String relURI)
    {
        if ( globalBase == null )
            globalBase = chooseBaseURI() ;
        return resolve(relURI, globalBase) ;  
    }

    static public void setBaseURI(String uriBase)
    {
        if ( uriBase != null && uriBase.startsWith("file:/") && ! uriBase.startsWith("file:///") )
            LogFactory.getLog(RelURI.class).warn("setBaseURI: File URIs should look like 'file:///path' (or at least file://host/path)") ;
        
        globalBase = uriBase ;
    }

    static public String getBaseURI()
    {
        return globalBase ;
    }
    
    
    /** Choose a base URI based on the current directory 
    * 
    * @return String      Absolute URI
    */ 
    
    static public String chooseBaseURI() { return chooseBaseURI(null) ; }
    
    /** Choose a baseURI based on a suggestion
     * 
    * @return String      Absolute URI
     */ 
    
    static public String chooseBaseURI(String baseURI)
    {
        if ( baseURI == null )
            baseURI = "file:." ;
        String scheme = FileUtils.getScheme(baseURI) ;
        if ( scheme == null )
        {
            scheme = "file" ;
            baseURI = "file:"+baseURI ;
        }
        
        // Not quite resolveFileURL (e.g. directory canonicalization).
        if ( scheme.equals("file") )
        {
//            if ( baseURI.startsWith("/") )
//                return "file://"+baseURI ;
            
            if ( ! baseURI.startsWith("file:///") )
            {
                try {
                    String tmp = baseURI.substring("file:".length()) ;
                    File f = new File(tmp) ;
                    String s = f.getCanonicalPath() ;
                    s = s.replace('\\', '/') ;
                    if ( s.indexOf(' ') >= 0 )
                        s = s.replaceAll(" ", "%20") ;
                    
                    if ( s.startsWith("/"))
                        // Already got one / - UNIX-like
                        baseURI = "file://"+s ;
                    else
                        // Absolute name does not start with / - Windows like
                        baseURI = "file:///"+s ;
                    
                    if ( f.isDirectory() && ! baseURI.endsWith("/") )
                        baseURI = baseURI+"/" ;

                } catch (IOException ex)
                {
                    LogFactory.getLog(RelURI.class).warn("IOException in chooseBase - ignored") ;
                    return null ;
                }
            }
        }
        return baseURI ;
    }
    
    
    /**
     * Turn a filename into a well-formed file: URL relative to the working directory.
     * @param filename
     * @return String The filename as an absolute URL
     */
    
    static public String resolveFileURL(String filename)
    {
        String s = filename ;
        try {
            // Pragmatic windows hack.
            if ( s.indexOf('\\') > -1 )
                s = s.replace('\\', '/') ;
            
            // Absolute path names
            if ( s.startsWith("file:///"))
                return s ;
            
            if ( s.startsWith("file://"))
                // Strictly legal but the next thing is the host
                // file://C:/ means host C, default port!
                return s ;
            
            if ( s.startsWith("file:/") )
            {
                // This converts Java's idea of file: URL
                // to one with ///
                s = filename.substring("file:/".length()) ;
                return "file:///"+s ;
            }

            // Relative path name.
            if ( s.startsWith("file:") )
                s = filename.substring("file:".length()) ;
            
            File f = new File(s) ;
            // If it ends in "/" keep it
            // (don't test for a directory - may not exist, and it costs more)
            if ( s.endsWith("/") )
                s = f.getAbsolutePath()+"/" ;
            else
                s = f.getCanonicalPath() ;
            // Windows file name to URI hierarchical paths
            s = s.replace('\\', '/') ;

            // java.net.URI messes up file:/// 
            if ( s.startsWith("/"))
                // Already got one / - UNIX-like
                s = "file://"+s ;
            else
                // Absolute name does not start with / - Windows like
                s = "file:///"+s ;
            return s ;
        } catch (IOException ex)
        {
            return null ;
        }

    }
}

class Cache1 implements Cache
{
    boolean isEnabled = true ;
    Object cacheKey = null ;
    Object cacheValue = null ;
    
    int numGet = 0 ;
    int numPut = 0 ;
    int numHits = 0 ;
    
    public Object get(Object key)
    {
        if ( ! isEnabled )
            return null ;
        
        numGet ++ ;
        
        if ( cacheKey == null )
            return null ;
        
        if ( cacheKey.equals(key) )
        {
            numHits ++ ;
            return cacheValue ;
        }
        
        return null ;
    }

    public void put(Object key, Object value)
    {
        if ( ! isEnabled )
            return ;
        numPut ++ ;
        cacheKey = key ; 
        cacheValue = value ;
    }

    public boolean getEnabled()
    {
        return isEnabled ;
    }

    public boolean setEnabled(boolean enabled)
    {
        boolean b = isEnabled ;
        isEnabled = enabled ;
        return b ;
    }

    public void clear()
    {
        cacheKey = null ;
        cacheValue = null ;
    }

    public long getGets() { return numGet ; }

    public long getPuts() { return numPut ; }

    public long getHits() { return numHits ; }
}


/*
 * (c) Copyright 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */