Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2011 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package ext.org.eclipse.jdt.internal.ui.refactoring; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import com.ibm.icu.text.Collator; import ext.org.eclipse.jdt.internal.corext.refactoring.base.ReferencesInBinaryContext; import ext.org.eclipse.jdt.internal.ui.JavaPluginImages; import ext.org.eclipse.jdt.internal.ui.search.AbstractJavaSearchResult; import ext.org.eclipse.jdt.internal.ui.search.NewSearchResultCollector; import ext.org.eclipse.jdt.internal.ui.util.SWTUtil; import ext.org.eclipse.jdt.internal.ui.viewsupport.AppearanceAwareLabelProvider; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.CLabel; import org.eclipse.swt.custom.ViewForm; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.OperationCanceledException; import org.eclipse.core.runtime.Status; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.search.ui.ISearchQuery; import org.eclipse.search.ui.ISearchResult; import org.eclipse.search.ui.NewSearchUI; import org.eclipse.ltk.core.refactoring.RefactoringStatusContext; import org.eclipse.ltk.ui.refactoring.IStatusContextViewer; import org.eclipse.jdt.core.IJavaModel; import org.eclipse.jdt.core.search.SearchMatch; import org.eclipse.jdt.ui.StandardJavaElementContentProvider; public class ReferencesInBinaryStatusContextViewer implements IStatusContextViewer { private static class ContentProvider extends StandardJavaElementContentProvider { private Map<Object, Object> fChildren = new HashMap<Object, Object>(); private Set<Object> fRoots = new HashSet<Object>(); @Override public Object[] getChildren(Object parentElement) { Object children = fChildren.get(parentElement); if (children == null) { return new Object[0]; } else if (children instanceof Set) { return ((Set<?>) children).toArray(); } else { return new Object[] { children }; } } @Override public boolean hasChildren(Object element) { return getChildren(element).length > 0; } @Override public Object[] getElements(Object inputElement) { return fRoots.toArray(); } public void add(Object element) { Object parent = getParent(element); while (parent != null) { if (parent instanceof IJavaModel) { fRoots.add(element); } else if (parent instanceof IWorkspaceRoot) { fRoots.add(element); } else { Object oldChildren = fChildren.get(parent); if (element.equals(oldChildren)) { return; } else if (oldChildren instanceof Set) { @SuppressWarnings("unchecked") Set<Object> oldChildrenSet = (Set<Object>) oldChildren; oldChildrenSet.add(element); return; } else if (oldChildren != null) { Set<Object> newChildren = new HashSet<Object>(4); newChildren.add(oldChildren); newChildren.add(element); fChildren.put(parent, newChildren); return; } else { fChildren.put(parent, element); } } element = parent; parent = getParent(element); } } } private ViewForm fForm; private CLabel fLabel; private TreeViewer fTreeViewer; private ReferencesInBinaryContext fInput; private Button fButton; /* * @see org.eclipse.ltk.ui.refactoring.IStatusContextViewer#setInput(org.eclipse.ltk.core.refactoring.RefactoringStatusContext) */ public void setInput(RefactoringStatusContext input) { ContentProvider contentProvider = new ContentProvider(); ReferencesInBinaryContext binariesContext = (ReferencesInBinaryContext) input; List<SearchMatch> matches = binariesContext.getMatches(); for (Iterator<SearchMatch> iter = matches.iterator(); iter.hasNext();) { SearchMatch match = iter.next(); Object element = match.getElement(); if (element != null) contentProvider.add(element); } fTreeViewer.setContentProvider(contentProvider); fTreeViewer.setInput(contentProvider); fLabel.setText(binariesContext.getDescription()); fInput = binariesContext; fButton.setEnabled(!matches.isEmpty()); } /** * {@inheritDoc} */ public void createControl(Composite parent) { fForm = new ViewForm(parent, SWT.BORDER | SWT.FLAT); fForm.marginWidth = 0; fForm.marginHeight = 0; fLabel = new CLabel(fForm, SWT.NONE); fLabel.setText(RefactoringMessages.ReferencesInBinaryStatusContextViewer_title); fForm.setTopLeft(fLabel); Composite composite = new Composite(fForm, SWT.NONE); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); GridLayout layout = new GridLayout(1, false); layout.marginWidth = 0; layout.marginHeight = 0; composite.setLayout(layout); fTreeViewer = new TreeViewer(composite, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); final AppearanceAwareLabelProvider labelProvider = new AppearanceAwareLabelProvider(); fTreeViewer.setLabelProvider(new DelegatingStyledCellLabelProvider(labelProvider)); fTreeViewer.setComparator(new ViewerComparator() { private Collator fCollator = Collator.getInstance(); @Override public int compare(Viewer viewer, Object e1, Object e2) { String l1 = labelProvider.getText(e1); String l2 = labelProvider.getText(e2); return fCollator.compare(l1, l2); } }); fTreeViewer.getTree().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); fButton = new Button(composite, SWT.PUSH); fButton.setText(RefactoringMessages.ReferencesInBinaryStatusContextViewer_show_as_search_button); GridData layoutData = new GridData(SWT.BEGINNING, SWT.CENTER, false, false); layoutData.widthHint = SWTUtil.getButtonWidthHint(fButton); fButton.setLayoutData(layoutData); fButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { fillInSearchView(); } }); fButton.setEnabled(false); fForm.setContent(composite); Dialog.applyDialogFont(parent); } protected void fillInSearchView() { NewSearchUI.runQueryInBackground(new ReferencesInBinarySearchQuery(fInput), null); fButton.setEnabled(false); } /** * {@inheritDoc} */ public Control getControl() { return fForm; } static class ReferencesInBinarySearchQuery implements ISearchQuery { private final ReferencesInBinaryContext fContext; private ReferencesInBinarySearchResult fResult; public ReferencesInBinarySearchQuery(ReferencesInBinaryContext context) { fContext = context; fResult = new ReferencesInBinarySearchResult(this); } public boolean canRerun() { return false; } public boolean canRunInBackground() { return true; } public String getLabel() { return fContext.getDescription(); } public ISearchResult getSearchResult() { return fResult; } public IStatus run(IProgressMonitor monitor) throws OperationCanceledException { fResult.removeAll(); List<SearchMatch> matches = fContext.getMatches(); NewSearchResultCollector collector = new NewSearchResultCollector(fResult, false); collector.beginReporting(); for (Iterator<SearchMatch> iter = matches.iterator(); iter.hasNext();) { try { collector.acceptSearchMatch(iter.next()); } catch (CoreException e) { // ignore } } collector.endReporting(); return Status.OK_STATUS; } } public static class ReferencesInBinarySearchResult extends AbstractJavaSearchResult { private final ReferencesInBinarySearchQuery fQuery; public ReferencesInBinarySearchResult(ReferencesInBinarySearchQuery query) { fQuery = query; } public ImageDescriptor getImageDescriptor() { return JavaPluginImages.DESC_OBJS_SEARCH_REF; } public String getLabel() { return fQuery.getLabel(); } public String getTooltip() { return getLabel(); } public ISearchQuery getQuery() { return fQuery; } } }