plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/nature/MograsimBuilder.java

   1 package net.mograsim.plugin.nature;
   2
   3 import java.util.Map;
   4
   5 import javax.xml.parsers.ParserConfigurationException;
   6 import javax.xml.parsers.SAXParser;
   7 import javax.xml.parsers.SAXParserFactory;
   8
   9 import org.eclipse.core.resources.IFile;
  10 import org.eclipse.core.resources.IMarker;
  11 import org.eclipse.core.resources.IProject;
  12 import org.eclipse.core.resources.IResource;
  13 import org.eclipse.core.resources.IResourceDelta;
  14 import org.eclipse.core.resources.IResourceDeltaVisitor;
  15 import org.eclipse.core.resources.IResourceVisitor;
  16 import org.eclipse.core.resources.IncrementalProjectBuilder;
  17 import org.eclipse.core.runtime.CoreException;
  18 import org.eclipse.core.runtime.IProgressMonitor;
  19 import org.xml.sax.SAXException;
  20 import org.xml.sax.SAXParseException;
  21 import org.xml.sax.helpers.DefaultHandler;
  22
  23 public class MograsimBuilder extends IncrementalProjectBuilder
  24 {
  25
  26         class SampleDeltaVisitor implements IResourceDeltaVisitor
  27         {
  28                 @Override
  29                 public boolean visit(IResourceDelta delta) throws CoreException
  30                 {
  31                         IResource resource = delta.getResource();
  32                         switch (delta.getKind())
  33                         {
  34                         case IResourceDelta.ADDED:
  35                                 // handle added resource
  36                                 checkXML(resource);
  37                                 break;
  38                         case IResourceDelta.REMOVED:
  39                                 // handle removed resource
  40                                 break;
  41                         case IResourceDelta.CHANGED:
  42                                 // handle changed resource
  43                                 checkXML(resource);
  44                                 break;
  45                         }
  46                         // return true to continue visiting children.
  47                         return true;
  48                 }
  49         }
  50
  51         class SampleResourceVisitor implements IResourceVisitor
  52         {
  53                 @Override
  54                 public boolean visit(IResource resource)
  55                 {
  56                         checkXML(resource);
  57                         // return true to continue visiting children.
  58                         return true;
  59                 }
  60         }
  61
  62         class XMLErrorHandler extends DefaultHandler
  63         {
  64
  65                 private IFile file;
  66
  67                 public XMLErrorHandler(IFile file)
  68                 {
  69                         this.file = file;
  70                 }
  71
  72                 private void addMarker(SAXParseException e, int severity)
  73                 {
  74                         MograsimBuilder.this.addMarker(file, e.getMessage(), e.getLineNumber(), severity);
  75                 }
  76
  77                 @Override
  78                 public void error(SAXParseException exception) throws SAXException
  79                 {
  80                         addMarker(exception, IMarker.SEVERITY_ERROR);
  81                 }
  82
  83                 @Override
  84                 public void fatalError(SAXParseException exception) throws SAXException
  85                 {
  86                         addMarker(exception, IMarker.SEVERITY_ERROR);
  87                 }
  88
  89                 @Override
  90                 public void warning(SAXParseException exception) throws SAXException
  91                 {
  92                         addMarker(exception, IMarker.SEVERITY_WARNING);
  93                 }
  94         }
  95
  96         public static final String BUILDER_ID = "PluginTest.mograsimBuilder";
  97
  98         private static final String MARKER_TYPE = "PluginTest.xmlProblem";
  99
 100         private SAXParserFactory parserFactory;
 101
 102         private void addMarker(IFile file, String message, int lineNumber, int severity)
 103         {
 104                 try
 105                 {
 106                         IMarker marker = file.createMarker(MARKER_TYPE);
 107                         marker.setAttribute(IMarker.MESSAGE, message);
 108                         marker.setAttribute(IMarker.SEVERITY, severity);
 109                         if (lineNumber == -1)
 110                         {
 111                                 lineNumber = 1;
 112                         }
 113                         marker.setAttribute(IMarker.LINE_NUMBER, lineNumber);
 114                 }
 115                 catch (CoreException e)
 116                 {
 117                 }
 118         }
 119
 120         @Override
 121         protected IProject[] build(int kind, Map<String, String> args, IProgressMonitor monitor) throws CoreException
 122         {
 123                 if (kind == FULL_BUILD)
 124                 {
 125                         fullBuild(monitor);
 126                 } else
 127                 {
 128                         IResourceDelta delta = getDelta(getProject());
 129                         if (delta == null)
 130                         {
 131                                 fullBuild(monitor);
 132                         } else
 133                         {
 134                                 incrementalBuild(delta, monitor);
 135                         }
 136                 }
 137                 return null;
 138         }
 139
 140         @Override
 141         protected void clean(IProgressMonitor monitor) throws CoreException
 142         {
 143                 // delete markers set and files created
 144                 getProject().deleteMarkers(MARKER_TYPE, true, IResource.DEPTH_INFINITE);
 145         }
 146
 147         void checkXML(IResource resource)
 148         {
 149                 if (resource instanceof IFile && resource.getName().endsWith(".xml"))
 150                 {
 151                         IFile file = (IFile) resource;
 152                         deleteMarkers(file);
 153                         XMLErrorHandler reporter = new XMLErrorHandler(file);
 154                         try
 155                         {
 156                                 getParser().parse(file.getContents(), reporter);
 157                         }
 158                         catch (Exception e1)
 159                         {
 160                         }
 161                 }
 162         }
 163
 164         private void deleteMarkers(IFile file)
 165         {
 166                 try
 167                 {
 168                         file.deleteMarkers(MARKER_TYPE, false, IResource.DEPTH_ZERO);
 169                 }
 170                 catch (CoreException ce)
 171                 {
 172                 }
 173         }
 174
 175         protected void fullBuild(final IProgressMonitor monitor) throws CoreException
 176         {
 177                 try
 178                 {
 179                         getProject().accept(new SampleResourceVisitor());
 180                 }
 181                 catch (CoreException e)
 182                 {
 183                 }
 184         }
 185
 186         private SAXParser getParser() throws ParserConfigurationException, SAXException
 187         {
 188                 if (parserFactory == null)
 189                 {
 190                         parserFactory = SAXParserFactory.newInstance();
 191                 }
 192                 return parserFactory.newSAXParser();
 193         }
 194
 195         protected void incrementalBuild(IResourceDelta delta, IProgressMonitor monitor) throws CoreException
 196         {
 197                 // the visitor does the work.
 198                 delta.accept(new SampleDeltaVisitor());
 199         }
 200 }