Clover coverage report - Code Coverage for hivemind release 1.0-beta-1
Coverage timestamp: Sat Jul 3 2004 09:41:37 EDT
file stats: LOC: 112   Methods: 2
NCLOC: 58   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
SDLResourceParser.java 100% 94.4% 100% 95.5%
coverage coverage
 1   
 //  Copyright 2004 The Apache Software Foundation
 2   
 //
 3   
 // Licensed under the Apache License, Version 2.0 (the "License");
 4   
 // you may not use this file except in compliance with the License.
 5   
 // You may obtain a copy of the License at
 6   
 //
 7   
 //     http://www.apache.org/licenses/LICENSE-2.0
 8   
 //
 9   
 // Unless required by applicable law or agreed to in writing, software
 10   
 // distributed under the License is distributed on an "AS IS" BASIS,
 11   
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12   
 // See the License for the specific language governing permissions and
 13   
 // limitations under the License.
 14   
 
 15   
 package org.apache.hivemind.sdl;
 16   
 
 17   
 import java.io.BufferedInputStream;
 18   
 import java.io.IOException;
 19   
 import java.io.InputStream;
 20   
 
 21   
 import org.apache.commons.logging.Log;
 22   
 import org.apache.commons.logging.LogFactory;
 23   
 import org.apache.hivemind.HiveMind;
 24   
 import org.apache.hivemind.Resource;
 25   
 import org.apache.hivemind.sdl.parser.SimpleDataLanguageParser;
 26   
 import org.apache.hivemind.sdl.parser.TokenMgrError;
 27   
 import org.xml.sax.ContentHandler;
 28   
 import org.xml.sax.Locator;
 29   
 import org.xml.sax.SAXParseException;
 30   
 
 31   
 /**
 32   
  * Wrapper around {@link org.apache.hivemind.sdl.parser.SimpleDataLanguageParser}
 33   
  * (which is generated code). Parses resources that contained Simple Data Language - a language
 34   
  * inspired by XML, but rationalized for storing hiearachical data (a frequent application of XML,
 35   
  * even though XML is better suited for rich document markup than storing of data).  SDL
 36   
  * is isomorphic to a subset of XML: It has equivalents for XML elements, XML attributes,
 37   
  * and parsable character data (text within an element), but does not support processing
 38   
  * instructions, namespaces, internal or external entities, doctype, etc.
 39   
  *
 40   
  * @author Howard Lewis Ship
 41   
  */
 42   
 public class SDLResourceParser
 43   
 {
 44   
     private static final Log LOG = LogFactory.getLog(SDLResourceParser.class);
 45   
 
 46   
     /**
 47   
      * Parses the resource, passing SAX parse events to the handler. SDL does
 48   
      * not (at this time) support namespaces or other constructs of XML, so only
 49   
      * the following methods of ContentHandler will be invoked:
 50   
      * <ul>
 51   
      * <li>{@link ContentHandler#setDocumentLocator(org.xml.sax.Locator)} - before any other calls
 52   
      * <ii>{@link ContentHandler#startDocument()}
 53   
      * <li>{@link ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
 54   
      *         - passing only the local name (namespace URL and qname will be null)
 55   
      * <li>{@link ContentHandler#characters(char[], int, int) for literal (and extended literal) strings
 56   
      * <li>{@link ContentHandler#endElement(java.lang.String, java.lang.String, java.lang.String) - again, with the namespace
 57   
      * parameters passed as null
 58   
      * <li>{@link ContentHandler#endDocument() - last
 59   
      * </ul>
 60   
      * 
 61   
      * <p>
 62   
      * At some future point, SDL may support more XML-like things, including names spaces.
 63   
      */
 64  110
     public void parseResource(Resource resource, ContentHandler handler)
 65   
         throws SAXParseException, IOException
 66   
     {
 67  110
         BufferedInputStream bis = null;
 68  110
         SimpleDataLanguageParser parser = null;
 69  110
         Locator locator = null;
 70   
 
 71  110
         try
 72   
         {
 73  110
             InputStream rawStream = resource.getResourceURL().openStream();
 74   
 
 75  110
             bis = new BufferedInputStream(rawStream);
 76   
 
 77  110
             parser = new SimpleDataLanguageParser(rawStream);
 78  110
             locator = parser.getLocator();
 79   
 
 80  110
             parser.parse(handler);
 81   
 
 82  108
             bis.close();
 83  108
             bis = null;
 84   
         }
 85   
         catch (TokenMgrError ex)
 86   
         {
 87  1
             throw new SAXParseException(SDLMessages.parseError(resource, ex), locator);
 88   
         }
 89   
         catch (Exception ex)
 90   
         {
 91  1
             throw new SAXParseException(SDLMessages.parseError(resource, ex), locator, ex);
 92   
         }
 93   
         finally
 94   
         {
 95  110
             close(resource, bis);
 96   
         }
 97   
     }
 98   
 
 99  110
     private void close(Resource resource, InputStream stream)
 100   
     {
 101  110
         try
 102   
         {
 103  110
             if (stream != null)
 104  2
                 stream.close();
 105   
         }
 106   
         catch (IOException ex)
 107   
         {
 108  0
             LOG.error(SDLMessages.unableToCloseStream(resource, ex), ex);
 109   
         }
 110   
     }
 111   
 }
 112