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                 public boolean visit(IResource resource)
  54                 {
  55                         checkXML(resource);
  56                         // return true to continue visiting children.
  57                         return true;
  58                 }
  59         }
  60
  61         class XMLErrorHandler extends DefaultHandler
  62         {
  63
  64                 private IFile file;
  65
  66                 public XMLErrorHandler(IFile file)
  67                 {
  68                         this.file = file;
  69                 }
  70
  71                 private void addMarker(SAXParseException e, int severity)
  72                 {
  73                         MograsimBuilder.this.addMarker(file, e.getMessage(), e.getLineNumber(), severity);
  74                 }
  75
  76                 public void error(SAXParseException exception) throws SAXException
  77                 {
  78                         addMarker(exception, IMarker.SEVERITY_ERROR);
  79                 }
  80
  81                 public void fatalError(SAXParseException exception) throws SAXException
  82                 {
  83                         addMarker(exception, IMarker.SEVERITY_ERROR);
  84                 }
  85
  86                 public void warning(SAXParseException exception) throws SAXException
  87                 {
  88                         addMarker(exception, IMarker.SEVERITY_WARNING);
  89                 }
  90         }
  91
  92         public static final String BUILDER_ID = "PluginTest.mograsimBuilder";
  93
  94         private static final String MARKER_TYPE = "PluginTest.xmlProblem";
  95
  96         private SAXParserFactory parserFactory;
  97
  98         private void addMarker(IFile file, String message, int lineNumber, int severity)
  99         {
 100                 try
 101                 {
 102                         IMarker marker = file.createMarker(MARKER_TYPE);
 103                         marker.setAttribute(IMarker.MESSAGE, message);
 104                         marker.setAttribute(IMarker.SEVERITY, severity);
 105                         if (lineNumber == -1)
 106                         {
 107                                 lineNumber = 1;
 108                         }
 109                         marker.setAttribute(IMarker.LINE_NUMBER, lineNumber);
 110                 }
 111                 catch (CoreException e)
 112                 {
 113                 }
 114         }
 115
 116         @Override
 117         protected IProject[] build(int kind, Map<String, String> args, IProgressMonitor monitor) throws CoreException
 118         {
 119                 if (kind == FULL_BUILD)
 120                 {
 121                         fullBuild(monitor);
 122                 } else
 123                 {
 124                         IResourceDelta delta = getDelta(getProject());
 125                         if (delta == null)
 126                         {
 127                                 fullBuild(monitor);
 128                         } else
 129                         {
 130                                 incrementalBuild(delta, monitor);
 131                         }
 132                 }
 133                 return null;
 134         }
 135
 136         protected void clean(IProgressMonitor monitor) throws CoreException
 137         {
 138                 // delete markers set and files created
 139                 getProject().deleteMarkers(MARKER_TYPE, true, IResource.DEPTH_INFINITE);
 140         }
 141
 142         void checkXML(IResource resource)
 143         {
 144                 if (resource instanceof IFile && resource.getName().endsWith(".xml"))
 145                 {
 146                         IFile file = (IFile) resource;
 147                         deleteMarkers(file);
 148                         XMLErrorHandler reporter = new XMLErrorHandler(file);
 149                         try
 150                         {
 151                                 getParser().parse(file.getContents(), reporter);
 152                         }
 153                         catch (Exception e1)
 154                         {
 155                         }
 156                 }
 157         }
 158
 159         private void deleteMarkers(IFile file)
 160         {
 161                 try
 162                 {
 163                         file.deleteMarkers(MARKER_TYPE, false, IResource.DEPTH_ZERO);
 164                 }
 165                 catch (CoreException ce)
 166                 {
 167                 }
 168         }
 169
 170         protected void fullBuild(final IProgressMonitor monitor) throws CoreException
 171         {
 172                 try
 173                 {
 174                         getProject().accept(new SampleResourceVisitor());
 175                 }
 176                 catch (CoreException e)
 177                 {
 178                 }
 179         }
 180
 181         private SAXParser getParser() throws ParserConfigurationException, SAXException
 182         {
 183                 if (parserFactory == null)
 184                 {
 185                         parserFactory = SAXParserFactory.newInstance();
 186                 }
 187                 return parserFactory.newSAXParser();
 188         }
 189
 190         protected void incrementalBuild(IResourceDelta delta, IProgressMonitor monitor) throws CoreException
 191         {
 192                 // the visitor does the work.
 193                 delta.accept(new SampleDeltaVisitor());
 194         }
 195 }