Examples of org.eclipse.core.resources.IMarker

org.eclipse.core.resources.IMarker
Markers are a general mechanism for associating notes and meta-data with resources.
Markers themselves are handles in the same way as IResources are handles. Instances of IMarker do not hold the attributes themselves but rather uniquely refer to the attribute container. As such, their state may change underneath the handle with no warning to the holder of the handle.
The Resources plug-in provides a general framework for defining and manipulating markers and provides several standard marker types.

Each marker has:
- a type string, specifying its type (e.g. "org.eclipse.core.resources.taskmarker"),
- an identifier which is unique (relative to a particular resource)
Specific types of markers may carry additional information.

The resources plug-in defines five standard types:
- org.eclipse.core.resources.marker
- org.eclipse.core.resources.taskmarker
- org.eclipse.core.resources.problemmarker
- org.eclipse.core.resources.bookmark
- org.eclipse.core.resources.textmarker
The plug-in also provides an extension point ( org.eclipse.core.resources.markers) into which other plug-ins can install marker type declaration extensions.

Marker types are declared within a multiple inheritance type system. New markers are defined in the plugin.xml file of the declaring plug-in. A valid declaration contains elements as defined by the extension point DTD:
- type - the unique name of the marker type
- super - the list of marker types of which this marker is to be considered a sub-type
- attributes - the list of standard attributes which may be present on this type of marker
- persistent - whether markers of this type should be persisted by the platform

                                final String message,
                                final int lineNumber) {
        try {
            IWorkspaceRunnable r = new IWorkspaceRunnable() {
                public void run(IProgressMonitor monitor) throws CoreException {
                    IMarker marker = res
                            .createMarker( IDroolsModelMarker.DROOLS_MODEL_PROBLEM_MARKER );
                    marker.setAttribute( IMarker.MESSAGE,
                                         message );
                    marker.setAttribute( IMarker.SEVERITY,
                                         IMarker.SEVERITY_ERROR );
                    marker.setAttribute( IMarker.LINE_NUMBER,
                                         lineNumber );
                }
            };
            res.getWorkspace().run( r,
                                    null,

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    for (int i = 0; i < length; i++){
      JavaProject project = projects[i];
      if (project != null) {
        if (cycleParticipants.contains(project.getPath())){
          IMarker cycleMarker = project.getCycleMarker();
          String circularCPOption = project.getOption(JavaCore.CORE_CIRCULAR_CLASSPATH, true);
          int circularCPSeverity = JavaCore.ERROR.equals(circularCPOption) ? IMarker.SEVERITY_ERROR : IMarker.SEVERITY_WARNING;
          if (cycleMarker != null) {
            // update existing cycle marker if needed
            try {
              int existingSeverity = ((Integer)cycleMarker.getAttribute(IMarker.SEVERITY)).intValue();
              if (existingSeverity != circularCPSeverity) {
                cycleMarker.setAttribute(IMarker.SEVERITY, circularCPSeverity);
              }
            } catch (CoreException e) {
              throw new JavaModelException(e);
            }
          } else {

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  /**
   * Record a new marker denoting a classpath problem
   */
  public void createClasspathProblemMarker(IJavaModelStatus status) {


    IMarker marker = null;
    int severity;
    String[] arguments = CharOperation.NO_STRINGS;
    boolean isCycleProblem = false, isClasspathFileFormatProblem = false;
    switch (status.getCode()) {


      case  IJavaModelStatusConstants.CLASSPATH_CYCLE :
        isCycleProblem = true;
        if (JavaCore.ERROR.equals(getOption(JavaCore.CORE_CIRCULAR_CLASSPATH, true))) {
          severity = IMarker.SEVERITY_ERROR;
        } else {
          severity = IMarker.SEVERITY_WARNING;
        }
        break;


      case  IJavaModelStatusConstants.INVALID_CLASSPATH_FILE_FORMAT :
        isClasspathFileFormatProblem = true;
        severity = IMarker.SEVERITY_ERROR;
        break;


      case  IJavaModelStatusConstants.INCOMPATIBLE_JDK_LEVEL :
        String setting = getOption(JavaCore.CORE_INCOMPATIBLE_JDK_LEVEL, true);
        if (JavaCore.ERROR.equals(setting)) {
          severity = IMarker.SEVERITY_ERROR;
        } else if (JavaCore.WARNING.equals(setting)) {
          severity = IMarker.SEVERITY_WARNING;
        } else {
          return; // setting == IGNORE
        }
        break;


      default:
        IPath path = status.getPath();
        if (path != null) arguments = new String[] { path.toString() };
        if (JavaCore.ERROR.equals(getOption(JavaCore.CORE_INCOMPLETE_CLASSPATH, true)) &&
          status.getSeverity() != IStatus.WARNING) {
          severity = IMarker.SEVERITY_ERROR;
        } else {
          severity = IMarker.SEVERITY_WARNING;
        }
        break;
    }


    try {
      marker = this.project.createMarker(IJavaModelMarker.BUILDPATH_PROBLEM_MARKER);
      marker.setAttributes(
        new String[] {
          IMarker.MESSAGE,
          IMarker.SEVERITY,
          IMarker.LOCATION,
          IJavaModelMarker.CYCLE_DETECTED,

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  protected void flushClasspathProblemMarkers(boolean flushCycleMarkers, boolean flushClasspathFormatMarkers) {
    try {
      if (this.project.isAccessible()) {
        IMarker[] markers = this.project.findMarkers(IJavaModelMarker.BUILDPATH_PROBLEM_MARKER, false, IResource.DEPTH_ZERO);
        for (int i = 0, length = markers.length; i < length; i++) {
          IMarker marker = markers[i];
          if (flushCycleMarkers && flushClasspathFormatMarkers) {
            marker.delete();
          } else {
            String cycleAttr = (String)marker.getAttribute(IJavaModelMarker.CYCLE_DETECTED);
            String classpathFileFormatAttr =  (String)marker.getAttribute(IJavaModelMarker.CLASSPATH_FILE_FORMAT);
            if ((flushCycleMarkers == (cycleAttr != null && cycleAttr.equals("true"))) //$NON-NLS-1$
              && (flushClasspathFormatMarkers == (classpathFileFormatAttr != null && classpathFileFormatAttr.equals("true")))){ //$NON-NLS-1$
              marker.delete();
            }
          }
        }
      }
    } catch (CoreException e) {

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  public IMarker getCycleMarker(){
    try {
      if (this.project.isAccessible()) {
        IMarker[] markers = this.project.findMarkers(IJavaModelMarker.BUILDPATH_PROBLEM_MARKER, false, IResource.DEPTH_ZERO);
        for (int i = 0, length = markers.length; i < length; i++) {
          IMarker marker = markers[i];
          String cycleAttr = (String)marker.getAttribute(IJavaModelMarker.CYCLE_DETECTED);
          if (cycleAttr != null && cycleAttr.equals("true")){ //$NON-NLS-1$
            return marker;
          }
        }
      }

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     * based upon the properties of the underlying marker.
     */
    protected void initialize()
    {
        fImageType = NO_IMAGE;
        IMarker marker = getMarker();


        if (MarkerUtilities.isMarkerType(marker, IBreakpoint.BREAKPOINT_MARKER))
        {


            if (fPresentation == null)
                fPresentation = DebugUITools.newDebugModelPresentation();


            setImage(null); // see bug 32469
            setLayer(4);
            fImageType = BREAKPOINT_IMAGE;


            fType = AnnotationType.UNKNOWN;


        }
        else
        {
            fType = AnnotationType.UNKNOWN;
            if (marker.exists())
            {
                try
                {
                    if (marker.isSubtypeOf(IMarker.PROBLEM))
                    {
                        int severity = marker
                            .getAttribute(IMarker.SEVERITY, -1);
                        switch (severity)
                        {
                        case IMarker.SEVERITY_ERROR:
                            fType = AnnotationType.ERROR;
                            break;
                        case IMarker.SEVERITY_WARNING:
                            fType = AnnotationType.WARNING;
                            break;
                        }
                    }
                    else if (marker.isSubtypeOf(IMarker.TASK)) fType = AnnotationType.TASK;
                    else if (marker.isSubtypeOf(IMarker.BOOKMARK))
                        fType = AnnotationType.BOOKMARK;


                }
                catch (CoreException e)
                {

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        }
    }


    public String getMessage()
    {
        IMarker marker = getMarker();
        if (marker == null || !marker.exists()) return ""; //$NON-NLS-1$
        else return marker.getAttribute(IMarker.MESSAGE, ""); //$NON-NLS-1$
    }

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        if (fImageType == BREAKPOINT_IMAGE)
        {
            Image result = super.getImage(display);
            if (result == null)
            {
                IMarker marker = getMarker();
                if (marker != null && marker.exists())
                {
                    result = fPresentation.getImage(getMarker());
                    setImage(result);
                }
            }

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  public void explain(ArrayList markers) {
    explanationText.setText("");
    
    for(int i=0; i<markers.size(); i++) {
      IMarker marker = (IMarker) markers.get(i);
      try {
        int pos = explanationText.getCharCount();
        explanationText.append((String) marker.getAttribute(IMarker.MESSAGE) +"\n");
        
        int severity = ((Integer) marker.getAttribute(IMarker.SEVERITY)).intValue();
        
        StyleRange styleRange = new StyleRange();
            styleRange.start = pos;
            styleRange.length = ((String) marker.getAttribute(IMarker.MESSAGE)).length();
            styleRange.fontStyle = SWT.BOLD;
            styleRange.foreground = severity == IMarker.SEVERITY_WARNING ? yellow : red;
            explanationText.setStyleRange(styleRange);
            
            
            String expStr = (String) marker.getAttribute(Constants.MARKER_ATTR_PERL_ERROR_EXPLANATION);
            
            String levelStr = null;
            
            if(expStr.length() > 0) {
              levelStr = (String) levels.get(expStr.substring(0,expStr.indexOf(")")+1));

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    {
        List markers = MarkerUtil.getMarkersForLine(resource, lineNr);
        
        for (Iterator i = markers.iterator(); i.hasNext();)
        {
            IMarker marker = (IMarker) i.next();
            try
            {
                Integer severity = (Integer) marker.getAttribute(IMarker.SEVERITY);
                if (severity != null && severity.intValue() == IMarker.SEVERITY_ERROR)
                    return false;
            }
            catch (CoreException e)
            {

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