Examples of org.eclipse.jdt.core.IJavaElement

org.eclipse.jdt.core.IJavaElement
Common protocol for all elements provided by the Java model. Java model elements are exposed to clients as handles to the actual underlying element. The Java model may hand out any number of handles for each element. Handles that refer to the same element are guaranteed to be equal, but not necessarily identical.
Methods annotated as "handle-only" do not require underlying elements to exist. Methods that require underlying elements to exist throw a JavaModelException when an underlying element is missing. JavaModelException.isDoesNotExist can be used to recognize this common special case.
@noimplement This interface is not intended to be implemented by clients.

  }


  private boolean createRootCode(IType type, ImportRewrite imports, IProgressMonitor monitor) {
    String init_name = INIT_METHOD_NAME;
    IMethod method = type.getMethod(INIT_METHOD_NAME, new String[0]);
    IJavaElement sibling = null;
    if (method != null && method.exists()) {
      try {
        sibling = getSibling(type, method);
        method.delete(false, monitor);
      } catch (JavaModelException e) {

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    // Identify the closest resource to the ASTNode,
    // otherwise fall back to using the high-level workspace root.
    if (root != null && root.getNodeType() == ASTNode.COMPILATION_UNIT) {
      CompilationUnit cu = (CompilationUnit) root;
      IJavaElement je = cu.getJavaElement();
      resource = je.getResource();
      // print type root name into message if no resource
      prefix = resource == null ? 
          "[" + analysisName + " in " + je.getElementName() + "]" : 
          "[" + analysisName + "]"; 
    }
    if (resource == null)
      // Fall back to the high-level Workspace
      resource = ResourcesPlugin.getWorkspace().getRoot();

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            JavaCompletionProposal jcp = (JavaCompletionProposal) o;
            //TODO: FIXME: this is very fragile as it uses reflection to access the private completion field.
            //Yet this is needed to do mvel filtering based on the method signtures, IF we use the richer JDT completion
            //                    Object field = ReflectionUtils.getField( o,
            //                                                             "fProposal" );
            IJavaElement javaElement = jcp.getJavaElement();
            if ( javaElement.getElementType() == IJavaElement.FIELD ) {
                set.add( o );


            }
        } else {
            set.add( o );

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            Object o = iter.next();
            if ( o instanceof AbstractJavaCompletionProposal ) {
                AbstractJavaCompletionProposal prop = (AbstractJavaCompletionProposal) o;
                String content = prop.getReplacementString();
                if ( completion.equals( content ) ) {
                    IJavaElement javaElement = prop.getJavaElement();
                    if ( javaElement instanceof ILocalVariable || javaElement instanceof IField ) {
                        return false;
                    }
                }
            }

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     * @return
     */
    protected String[] getPackageNames(ICompilationUnit unit) {


        List<String> packageNames = new ArrayList<String>();
        IJavaElement parent = unit.getParent();
        while (parent != null && parent.getElementType() == IJavaElement.PACKAGE_FRAGMENT) {
            String elementName = parent.getElementName();
            for (String packageName : elementName.split("\\.")) {
                packageNames.add(packageName);
            }
            parent = parent.getParent();
        }
        return packageNames.toArray(new String[packageNames.size()]);
    }

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    // Identify the closest resource to the ASTNode,
    // otherwise fall back to using the high-level workspace root.
    if (root.getNodeType() == ASTNode.COMPILATION_UNIT) {
      CompilationUnit cu = (CompilationUnit) root;
      IJavaElement je = cu.getJavaElement();
      resource = je.getResource();
    }
    else {
      // Use the high-level Workspace
      resource = ResourcesPlugin.getWorkspace().getRoot();
    }

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  public void init(IWorkbench workbench, IStructuredSelection selection) {
    m_sourceFolder = null;
    try {
      Object selectedObject = selection.getFirstElement();
      if (selectedObject instanceof IJavaElement) {
        IJavaElement element = (IJavaElement) selectedObject;
        m_sourceFolder = CodeUtils.getPackageFragmentRoot(element);
      }
    } catch (Throwable e) {
      DesignerPlugin.log(e);
    }

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  /**
   * Tests property, can throw {@link Exception}.
   */
  private static boolean testEx(Object receiver, String property) throws Exception {
    // prepare IJavaElement
    final IJavaElement element;
    if (receiver instanceof IAdaptable) {
      element = (IJavaElement) ((IAdaptable) receiver).getAdapter(IJavaElement.class);
    } else {
      element = null;
    }
    // Java tests
    {
      // prepare java element
      if (element == null || !element.exists()) {
        return false;
      }
      // do tests
      if (PROPERTY_IS_CONFIGURED.equals(property)) {
        IJavaProject javaProject = element.getJavaProject();
        boolean hasJar = javaProject.findType("com.extjs.gxt.ui.client.widget.Component") != null;
        if (hasJar) {
          IJavaElement pkg = element.getAncestor(IJavaElement.PACKAGE_FRAGMENT);
          if (pkg != null) {
            IResource resource = pkg.getUnderlyingResource();
            ModuleDescription module = Utils.getSingleModule(resource);
            return module != null && Utils.inheritsModule(module, "com.extjs.gxt.ui.GXT");
          }
        }
        return false;

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   */
  public void test_isRemoteService_IJavaElement() throws Exception {
    IJavaProject javaProject = m_testProject.getJavaProject();
    // EntryPoint is NOT RemoteService
    {
      IJavaElement element = javaProject.findType("test.client.Module");
      assertFalse(Utils.isRemoteService(element));
    }
    // new RemoteService
    {
      IJavaElement element = GTestUtils.createTestService(this)[0];
      assertTrue(Utils.isRemoteService(element));
    }
  }

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   */
  public void test_isRemoteServiceImpl() throws Exception {
    IJavaProject javaProject = m_testProject.getJavaProject();
    // IJavaProject is NOT RemoteService impl
    {
      IJavaElement element = javaProject;
      assertFalse(Utils.isRemoteServiceImpl(element));
    }
    // EntryPoint is NOT RemoteService impl
    {
      IJavaElement element = javaProject.findType("test.client.Module");
      assertFalse(Utils.isRemoteServiceImpl(element));
    }
    // new RemoteService impl
    {
      IType element = GTestUtils.createTestService(this)[1];
      // type itself is RemoteService impl
      assertTrue(Utils.isRemoteServiceImpl(element));
      // ...and enclosing IType too
      assertTrue(Utils.isRemoteServiceImpl(element.getCompilationUnit()));
    }
  }

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