Examples of org.eclipse.jface.viewers.IElementComparer

org.eclipse.jface.viewers.IElementComparer
This interface is used to compare elements in a viewer for equality, and to provide the hash code for an element. This allows the client of the viewer to specify different equality criteria and a different hash code implementation than the equals and hashCode implementations of the elements themselves. @see StructuredViewer#setComparer

            super(id, parent, style);
            this.pydevPackageExplorer = pydevPackageExplorer;


            //We need to be able to compare actual resources and IWrappedResources
            //as if they were the same thing.
            setComparer(new IElementComparer() {


                public int hashCode(Object element) {
                    if (element instanceof IWrappedResource) {
                        IWrappedResource wrappedResource = (IWrappedResource) element;
                        return wrappedResource.getActualObject().hashCode();

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    createCellEditors(table);


    tableViewer.setContentProvider(new ArrayContentProvider());
    tableViewer.setInput(specs);


    tableViewer.setComparer(new IElementComparer() {
      public boolean equals(Object a, Object b) {
        // need that as viewers are not designed to support 2 equals
        // object, while we have RefSpec#equals implemented
        return a == b;
      }

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        if (reader != null)
          reader.release();
      }
    });


    treeViewer.setComparer(new IElementComparer() {
      // we need this to keep refresh() working while having custom
      // equals() in PushOperationResult
      public boolean equals(Object a, Object b) {
        return a == b;
      }

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      }
    });
    btnExportProfile.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
    btnExportProfile.setText("Export Profile ...");


    checkboxTreeViewer.setComparer(new IElementComparer() {


      @Override
      public boolean equals(Object a, Object b) {
        return a == b;
      }

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   * return <code>TRUE</code> for a reference compared with an Entity that has
   * the same ID and is belonging to the same Entity. At any time, it _must_ be
   * avoided to call add, update or refresh with passing in a Reference!
   */
  private IElementComparer getComparer() {
    return new IElementComparer() {
      public boolean equals(Object a, Object b) {


        /* Quickyly check this common case */
        if (a == b)
          return true;

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   * return <code>TRUE</code> for a reference compared with an Entity that has
   * the same ID and is belonging to the same Entity. At any time, it _must_ be
   * avoided to call add, update or refresh with passing in a Reference!
   */
  private IElementComparer getComparer() {
    return new IElementComparer() {
      public boolean equals(Object a, Object b) {


        /* Quickyly check this common case */
        if (a == b && a != null)
          return true;

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