001package org.hl7.fhir.utilities;
002
003/*
004  Copyright (c) 2011+, HL7, Inc.
005  All rights reserved.
006  
007  Redistribution and use in source and binary forms, with or without modification, 
008  are permitted provided that the following conditions are met:
009    
010   * Redistributions of source code must retain the above copyright notice, this 
011     list of conditions and the following disclaimer.
012   * Redistributions in binary form must reproduce the above copyright notice, 
013     this list of conditions and the following disclaimer in the documentation 
014     and/or other materials provided with the distribution.
015   * Neither the name of HL7 nor the names of its contributors may be used to 
016     endorse or promote products derived from this software without specific 
017     prior written permission.
018  
019  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
020  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
021  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
022  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
023  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
024  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
025  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
026  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
027  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
028  POSSIBILITY OF SUCH DAMAGE.
029  
030 */
031
032
033
034/*
035Copyright (c) 2011+, HL7, Inc
036All rights reserved.
037
038Redistribution and use in source and binary forms, with or without modification, 
039are permitted provided that the following conditions are met:
040
041 * Redistributions of source code must retain the above copyright notice, this 
042   list of conditions and the following disclaimer.
043 * Redistributions in binary form must reproduce the above copyright notice, 
044   this list of conditions and the following disclaimer in the documentation 
045   and/or other materials provided with the distribution.
046 * Neither the name of HL7 nor the names of its contributors may be used to 
047   endorse or promote products derived from this software without specific 
048   prior written permission.
049
050THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
051ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
052WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
053IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
054INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
055NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
056PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
057WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
058ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
059POSSIBILITY OF SUCH DAMAGE.
060
061*/
062
063import java.io.File;
064import java.io.FileInputStream;
065import java.io.FileNotFoundException;
066import java.io.IOException;
067
068import javax.xml.transform.Source;
069import javax.xml.transform.TransformerException;
070import javax.xml.transform.TransformerFactory;
071import javax.xml.transform.URIResolver;
072import javax.xml.transform.stream.StreamSource;
073
074public class MyURIResolver implements URIResolver {
075
076  private String path;
077  private URIResolver alt;  
078  
079  public MyURIResolver(String path, URIResolver alt) {
080    super();
081    this.path = path;
082    this.alt = alt;
083  }
084
085
086  @Override
087  public Source resolve(String href, String base) throws TransformerException {
088    try {
089      if (href.startsWith("http://") || href.startsWith("https://")) {
090        if (alt != null) {
091          Source s = alt.resolve(href, base);
092          if (s != null)
093            return s;
094        }
095        return TransformerFactory.newInstance().getURIResolver().resolve(href, base);
096      } else
097        return new StreamSource(new FileInputStream(href.contains(File.separator) ? href : Utilities.path(path, href)));
098    } catch (FileNotFoundException e) {
099      throw new TransformerException(e);
100    } catch (IOException e) {
101      throw new TransformerException(e);
102    }
103  }
104
105}