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

            for ( int i = 0; i < classpathEntries.length; i++ ) {
                if ( NewDroolsProjectWizard.DROOLS_CLASSPATH_CONTAINER_PATH.equals( classpathEntries[i].getPath().toString() ) ) {
                    String[] jars = DroolsRuntimeManager.getDroolsRuntimeJars( getProject() );
                    if ( jars == null || jars.length == 0 ) {
                        String runtime = DroolsRuntimeManager.getDroolsRuntime( getProject() );
                        IMarker marker = getProject().createMarker( IDroolsModelMarker.DROOLS_MODEL_PROBLEM_MARKER );
                        if ( runtime == null ) {
                            marker.setAttribute( IMarker.MESSAGE,
                                                 "Could not find default Drools runtime" );
                        } else {
                            marker.setAttribute( IMarker.MESSAGE,
                                                 "Could not find Drools runtime " + runtime );
                        }
                        marker.setAttribute( IMarker.SEVERITY,
                                             IMarker.SEVERITY_ERROR );
                        return;
                    }
                }
            }

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                                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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      sevMarker = IMarker.SEVERITY_INFO;


    // Create the marker
    // TODO: create markers according to the type of the analysis
    try {
      IMarker marker = resource.createMarker(Crystal.MARKER_DEFAULT);
      marker.setAttribute(IMarker.CHAR_START, node.getStartPosition());
      marker.setAttribute(IMarker.CHAR_END, node.getStartPosition() + node.getLength());
      marker.setAttribute(IMarker.MESSAGE, "[" + analysisName + "]: " + problemDescription);
      marker.setAttribute(IMarker.PRIORITY, IMarker.PRIORITY_NORMAL);
      marker.setAttribute(IMarker.SEVERITY, sevMarker);
      marker.setAttribute(Crystal.MARKER_ATTR_ANALYSIS, analysisName);
      CompilationUnit cu = (CompilationUnit) node.getRoot();
      int line = cu.getLineNumber(node.getStartPosition());
      if (line >= 0) // -1 and -2 indicate error conditions
        marker.setAttribute(IMarker.LINE_NUMBER, line);
    }
    catch (CoreException ce) {
      logger.log(Level.SEVERE, "CoreException when creating marker", ce);
    }
  }

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  private SAXParserFactory parserFactory;


  private void addMarker(IFile file, String message, int lineNumber,
      int severity) {
    try {
      IMarker marker = file.createMarker(MARKER_TYPE);
      marker.setAttribute(IMarker.MESSAGE, message);
      marker.setAttribute(IMarker.SEVERITY, severity);
      if (lineNumber == -1) {
        lineNumber = 1;
      }
      marker.setAttribute(IMarker.LINE_NUMBER, lineNumber);
    } catch (CoreException e) {
    }
  }

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                    HashMap map = new HashMap();
                    map.put(IMarker.LINE_NUMBER, new Integer(myFile));
                    map.put(IWorkbenchPage.EDITOR_ID_ATTR,
                            "org.eclipse.wst.xml.ui.internal.tabletree.XMLMultiPageEditorPart");
                    IMarker marker = file.createMarker(IMarker.TEXT);
                    marker.setAttributes(map);
                    //page.openEditor(marker); //2.1 API
                    IDE.openEditor(activePage, marker);


                }
                catch (PartInitException e)

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                    incrementalBuild( delta,
                                      monitor );
                }
            }
        } catch ( CoreException e ) {
            IMarker marker = currentProject.createMarker( IDroolsModelMarker.DROOLS_MODEL_PROBLEM_MARKER );
            marker.setAttribute( IMarker.MESSAGE,
                                 "Error when trying to build Drools project: " + e.getLocalizedMessage() );
            marker.setAttribute( IMarker.SEVERITY,
                                 IMarker.SEVERITY_ERROR );
        }


        return getRequiredProjects( currentProject );
    }

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        for ( int i = 0; i < classpathEntries.length; i++ ) {
            if ( NewDroolsProjectWizard.DROOLS_CLASSPATH_CONTAINER_PATH.equals( classpathEntries[i].getPath().toString() ) ) {
                String[] jars = DroolsRuntimeManager.getDroolsRuntimeJars( getProject() );
                if ( jars == null || jars.length == 0 ) {
                    String runtime = DroolsRuntimeManager.getDroolsRuntime( getProject() );
                    IMarker marker = getProject().createMarker( IDroolsModelMarker.DROOLS_MODEL_PROBLEM_MARKER );
                    if ( runtime == null ) {
                        marker.setAttribute( IMarker.MESSAGE,
                                             "Could not find default Drools runtime" );
                    } else {
                        marker.setAttribute( IMarker.MESSAGE,
                                             "Could not find Drools runtime " + runtime );
                    }
                    marker.setAttribute( IMarker.SEVERITY,
                                         IMarker.SEVERITY_ERROR );
                    return;
                }
            }
        }

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                                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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                    incrementalBuild( delta,
                                      monitor );
                }
            }
        } catch ( CoreException e ) {
            IMarker marker = currentProject.createMarker( IDroolsModelMarker.DROOLS_MODEL_PROBLEM_MARKER );
            marker.setAttribute( IMarker.MESSAGE,
                                 "Error when trying to build Drools project: " + e.getLocalizedMessage() );
            marker.setAttribute( IMarker.SEVERITY,
                                 IMarker.SEVERITY_ERROR );
        }
        return getRequiredProjects( currentProject );
    }

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        for ( int i = 0; i < classpathEntries.length; i++ ) {
            if ( NewDroolsProjectWizard.DROOLS_CLASSPATH_CONTAINER_PATH.equals( classpathEntries[i].getPath().toString() ) ) {
                String[] jars = DroolsRuntimeManager.getDroolsRuntimeJars( getProject() );
                if ( jars == null || jars.length == 0 ) {
                    String runtime = DroolsRuntimeManager.getDroolsRuntime( getProject() );
                    IMarker marker = getProject().createMarker( IDroolsModelMarker.DROOLS_MODEL_PROBLEM_MARKER );
                    if ( runtime == null ) {
                        marker.setAttribute( IMarker.MESSAGE,
                                             "Could not find default Drools runtime" );
                    } else {
                        marker.setAttribute( IMarker.MESSAGE,
                                             "Could not find Drools runtime " + runtime );
                    }
                    marker.setAttribute( IMarker.SEVERITY,
                                         IMarker.SEVERITY_ERROR );
                    return;
                }
            }
        }

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