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//$Id$
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package eu.etaxonomy.taxeditor.ui.dialog.selection;
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import java.lang.reflect.Field;
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import java.text.Collator;
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import java.util.Comparator;
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import java.util.List;
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import org.eclipse.core.runtime.CoreException;
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import org.eclipse.core.runtime.IProgressMonitor;
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import org.eclipse.core.runtime.IStatus;
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import org.eclipse.core.runtime.OperationCanceledException;
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import org.eclipse.core.runtime.Status;
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import org.eclipse.jface.dialogs.IDialogSettings;
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import org.eclipse.jface.viewers.ILabelProvider;
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import org.eclipse.jface.viewers.LabelProvider;
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import org.eclipse.jface.window.Window;
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import org.eclipse.jface.wizard.WizardDialog;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.events.SelectionAdapter;
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import org.eclipse.swt.events.SelectionEvent;
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import org.eclipse.swt.events.SelectionListener;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Control;
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import org.eclipse.swt.widgets.Link;
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import org.eclipse.swt.widgets.Shell;
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import org.eclipse.swt.widgets.Text;
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import org.eclipse.ui.IMemento;
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import org.eclipse.ui.dialogs.FilteredItemsSelectionDialog;
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import eu.etaxonomy.cdm.api.conversation.ConversationHolder;
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import eu.etaxonomy.cdm.api.conversation.IConversationEnabled;
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import eu.etaxonomy.cdm.model.common.IEnumTerm;
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import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.newWizard.AbstractNewEntityWizard;
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import eu.etaxonomy.taxeditor.store.internal.TaxeditorStorePlugin;
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/**
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* <p>Abstract AbstractFilteredCdmEnumSelectionDialog class.</p>
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*
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* @author c.mathew
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* @created 18.07.2013
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* @version 1.0
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*/
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public abstract class AbstractFilteredCdmEnumSelectionDialog<T extends IEnumTerm> extends
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FilteredItemsSelectionDialog implements IConversationEnabled {
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private ConversationHolder conversation;
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protected List<T> model;
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private String settings;
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/**
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* <p>Constructor for AbstractFilteredCdmResourceSelectionDialog.</p>
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*
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* @param shell a {@link org.eclipse.swt.widgets.Shell} object.
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* @param conversation
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* @param title a {@link java.lang.String} object.
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* @param multi a boolean.
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* @param settings a {@link java.lang.String} object.
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* @param cdmEnum a T object.
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* @param <T> a T object.
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*/
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protected AbstractFilteredCdmEnumSelectionDialog(Shell shell,
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ConversationHolder conversation,
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String title,
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boolean multi,
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String settings,
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T cdmEnum) {
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super(shell, multi);
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setTitle(title);
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setMessage("Use * for wildcard, or ? to see all entries");
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this.settings = settings;
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this.conversation = conversation;
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init();
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initModel();
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String objectTitle = getTitle(cdmEnum);
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if (objectTitle != null) {
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setInitialPattern(objectTitle);
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}
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setListLabelProvider(createListLabelProvider());
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setDetailsLabelProvider(createDetailsLabelProvider());
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setSelectionHistory(new ResourceSelectionHistory());
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}
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/**
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* By default, we are returning the standard list label provider
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*
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* Override in subclasses if you want different behavior
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*
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* @return
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*/
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protected ILabelProvider createDetailsLabelProvider() {
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return createListLabelProvider();
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}
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/**
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*
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* @return
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*/
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protected ILabelProvider createListLabelProvider() {
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return new FilteredCdmResourceLabelProvider();
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}
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/**
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* Override in subclasses.
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* Will run before initModel()
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*/
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protected void init() {
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}
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/**
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* <p>getSelectionFromDialog</p>
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*
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* @param dialog a {@link eu.etaxonomy.taxeditor.ui.dialog.selection.AbstractFilteredCdmResourceSelectionDialog} object.
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* @param <TYPE> a TYPE object.
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* @return a TYPE object.
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*/
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protected static <TYPE extends IEnumTerm> TYPE getSelectionFromDialog(AbstractFilteredCdmEnumSelectionDialog<TYPE> dialog) {
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int result = dialog.open();
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if (result == Window.CANCEL) {
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return null;
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}
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return dialog.getSelectedEnumTerm();
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}
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/**
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* <p>getTitle</p>
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*
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* @param cdmObject a T object.
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* @return a {@link java.lang.String} object.
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*/
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protected String getTitle(T cdmEnum) {
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return cdmEnum.getMessage();
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}
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/** {@inheritDoc} */
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@Override
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public void refresh() {
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initModel();
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super.refresh();
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}
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/**
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* <p>initModel</p>
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*/
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abstract protected void initModel();
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/* (non-Javadoc)
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog#createFilter()
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*/
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/** {@inheritDoc} */
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@Override
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protected ItemsFilter createFilter() {
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return new ItemsFilter() {
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/**
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* Always returns false to enforce refiltering even if the pattern is equal
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*/
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@Override
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public boolean equalsFilter(ItemsFilter filter) {
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return false;
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}
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@Override
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public boolean isConsistentItem(Object item) {
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return false;
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}
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@Override
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public boolean matchItem(Object item) {
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String text = null;
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if(item instanceof IEnumTerm){
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text = ((IEnumTerm) item).getMessage();
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}else if(item instanceof String){
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text = (String) item;
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}
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return text != null ? matches(text) : false;
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}
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};
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}
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/**
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* Set the filter input to the Agent's title cache
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*
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* @param cdmObject a T object.
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*/
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protected void setPattern(T cdmObject) {
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// FilteredSelection does some very tricky caching to make sure it
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// runs with high performance.
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// This works for most use cases, but we want to change the model while the dialog is open
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// and all the clever caching prevents the content provider from knowing that the model has changed
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// I am aware, that this is a hack, but the FilteredSelectionDialog API does not offer a convenient
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// way to solve the problem.
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try {
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Field lastCompletedFilter = this.getClass().getSuperclass().getSuperclass().getDeclaredField("lastCompletedFilter");
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lastCompletedFilter.setAccessible(true);
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lastCompletedFilter.set(this, null);
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} catch (SecurityException e) {
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MessagingUtils.error(getClass(), e);
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} catch (NoSuchFieldException e) {
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MessagingUtils.error(getClass(), e);
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} catch (IllegalArgumentException e) {
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MessagingUtils.error(getClass(), e);
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} catch (IllegalAccessException e) {
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MessagingUtils.error(getClass(), e);
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}
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// this also is not the nicest way to do it.
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// I am still amazed, that FilteredSelectionDialog does not offer any methods to change its data
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// once it was opened. Am I doing it wrong?
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String pattern = getTitle(cdmObject);
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((Text) getPatternControl()).setText(pattern);
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}
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/* (non-Javadoc)
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog#fillContentProvider(org.eclipse.ui.dialogs.FilteredItemsSelectionDialog.AbstractContentProvider, org.eclipse.ui.dialogs.FilteredItemsSelectionDialog.ItemsFilter, org.eclipse.core.runtime.IProgressMonitor)
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*/
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/** {@inheritDoc} */
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@Override
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protected void fillContentProvider(AbstractContentProvider contentProvider,
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ItemsFilter itemsFilter, IProgressMonitor progressMonitor)
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throws CoreException {
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try {
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if(model != null){
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progressMonitor.beginTask("Looking for entities", model.size());
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for(T element : model){
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contentProvider.add(element, itemsFilter);
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if (progressMonitor.isCanceled()) {
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throw new OperationCanceledException();
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}
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progressMonitor.worked(1);
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}
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}else{
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MessagingUtils.warn(getClass(), "Model for Filtered Selection is null:" + this.getClass().getSimpleName());
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}
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}
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finally {
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progressMonitor.done();
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}
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}
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/* (non-Javadoc)
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog#getDialogSettings()
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*/
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/** {@inheritDoc} */
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@Override
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protected IDialogSettings getDialogSettings() {
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IDialogSettings settings = TaxeditorStorePlugin.getDefault().getDialogSettings().getSection(getSettings());
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if (settings == null) {
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settings = TaxeditorStorePlugin.getDefault().getDialogSettings().addNewSection(getSettings());
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}
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return settings;
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}
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/* (non-Javadoc)
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog#getElementName(java.lang.Object)
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*/
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/** {@inheritDoc} */
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@Override
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public String getElementName(Object item) {
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return ((IEnumTerm) item).getMessage();
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}
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/* (non-Javadoc)
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog#getItemsComparator()
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*/
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/** {@inheritDoc} */
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@Override
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protected Comparator getItemsComparator() {
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return new Comparator<IEnumTerm>() {
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@Override
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public int compare(IEnumTerm entity1,
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IEnumTerm entity2) {
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if (entity1.equals(entity2)){
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return 0;
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}
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Collator collator = Collator.getInstance();
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int result = collator.compare(entity1.getMessage(), entity2.getMessage());
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if (result == 0){
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return entity1.getUuid().compareTo(entity2.getUuid());
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}
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return result;
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}
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};
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}
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/* (non-Javadoc)
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog#validateItem(java.lang.Object)
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*/
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/** {@inheritDoc} */
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@Override
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protected IStatus validateItem(Object item) {
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return Status.OK_STATUS;
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}
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/**
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* <p>getSelectedUuidAndTitleCache</p>
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*
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* @return a {@link eu.etaxonomy.cdm.model.common.UuidAndTitleCache} object.
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*/
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protected T getSelectedEnumTerm() {
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Object[] result = getResult();
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return result[0] == null ? null : (T) result[0];
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}
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/**
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* <p>Getter for the field <code>settings</code>.</p>
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*
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* @return a {@link java.lang.String} object.
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*/
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public String getSettings() {
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if(settings == null){
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throw new IllegalStateException("No SETTINGS set.");
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}
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return settings;
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}
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/**
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*
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* @author n.hoffmann
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* @created Oct 19, 2009
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* @version 1.0
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*/
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private class ResourceSelectionHistory extends SelectionHistory {
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/*
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog.SelectionHistory#restoreItemFromMemento(org.eclipse.ui.IMemento)
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*/
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@Override
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protected Object restoreItemFromMemento(IMemento element) {
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return element.getString("resource"); //$NON-NLS-1$
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}
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/*
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog.SelectionHistory#storeItemToMemento(java.lang.Object,
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* org.eclipse.ui.IMemento)
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*/
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@Override
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protected void storeItemToMemento(Object item, IMemento element) {
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element.putString("resource", item.toString()); //$NON-NLS-1$
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}
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}
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/**
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* <p>getNewWizardLinkText</p>
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*
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* @return a {@link java.lang.String} object.
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*/
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protected abstract String getNewWizardLinkText();
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/**
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* <p>getNewEntityWizard</p>
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* @param parameter
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* @return a {@link eu.etaxonomy.taxeditor.newWizard.AbstractNewEntityWizard} object.
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*/
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protected abstract AbstractNewEntityWizard getNewEntityWizard(String parameter);
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public class FilteredCdmResourceLabelProvider extends LabelProvider {
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@Override
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public String getText(Object element) {
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if (element == null) {
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return null;
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}
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return ((IEnumTerm) element).getMessage();
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}
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};
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/* (non-Javadoc)
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* @see org.eclipse.ui.dialogs.FilteredItemsSelectionDialog#createExtendedContentArea(org.eclipse.swt.widgets.Composite)
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*/
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/** {@inheritDoc} */
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@Override
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protected Control createExtendedContentArea(Composite parent) {
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if(getNewWizardLinkText() != null){
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Link link = new Link(parent, SWT.NONE);
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link.setText(getNewWizardLinkText());
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link.addSelectionListener(getNewWizardLinkSelectionListener());
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return link;
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}
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return null;
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}
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protected SelectionListener getNewWizardLinkSelectionListener(){
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return new SelectionAdapter() {
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/* (non-Javadoc)
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* @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
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*/
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@Override
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public void widgetSelected(SelectionEvent e) {
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AbstractNewEntityWizard wizard = getNewEntityWizard(e.text);
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wizard.init(null, null);
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WizardDialog dialog = new WizardDialog(getShell(), wizard);
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int status = dialog.open();
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if (status == IStatus.OK) {
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T entity = (T) wizard.getEntity();
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refresh();
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setPattern(entity);
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getConversationHolder().bind();
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}
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}
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};
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}
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/**
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* <p>getConversationHolder</p>
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*
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* @return a {@link eu.etaxonomy.cdm.api.conversation.ConversationHolder} object.
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*/
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@Override
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public ConversationHolder getConversationHolder() {
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return conversation;
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}
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/** {@inheritDoc} */
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@Override
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public void update(CdmDataChangeMap changeEvents) {}
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}
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