org.eclipse.emf.cdo.internal.ui.ItemsProcessor.java Source code

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Here is the source code for org.eclipse.emf.cdo.internal.ui.ItemsProcessor.java

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/***************************************************************************
 * Copyright (c) 2004 - 2008 Eike Stepper, Germany.
 * 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:
 *    Eike Stepper - initial API and implementation
 **************************************************************************/
package org.eclipse.emf.cdo.internal.ui;

import org.eclipse.emf.cdo.CDOView;
import org.eclipse.emf.cdo.common.id.CDOID;

import org.eclipse.emf.internal.cdo.InternalCDOObject;
import org.eclipse.emf.internal.cdo.util.FSMUtil;

import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.TreeItem;

import java.util.Set;

/**
 * @author Eike Stepper
 */
public abstract class ItemsProcessor {
    private CDOView view;

    public ItemsProcessor(CDOView view) {
        this.view = view;
    }

    public CDOView getView() {
        return view;
    }

    public void processCDOObjects(TreeViewer viewer) {
        processCDOObjects(viewer, null);
    }

    public void processCDOObjects(final TreeViewer viewer, final Set<CDOID> ids) {
        try {
            viewer.getControl().getDisplay().syncExec(new Runnable() {
                public void run() {
                    try {
                        processObject(viewer, ids, viewer.getInput());
                        processItems(viewer, ids, viewer.getTree().getItems());
                    } catch (Exception ignore) {
                    }
                }
            });
        } catch (Exception ignore) {
        }
    }

    protected InternalCDOObject getCDOObject(Object object) {
        if (object instanceof InternalCDOObject) {
            return (InternalCDOObject) object;
        }

        if (object != null && view != null) {
            return FSMUtil.adapt(object, view);
        }

        return null;
    }

    protected abstract void processCDOObject(TreeViewer viewer, InternalCDOObject cdoObject);

    private void processItems(TreeViewer viewer, Set<CDOID> ids, TreeItem[] items) {
        for (TreeItem item : items) {
            Object object = item.getData();
            processObject(viewer, ids, object);
            if (item.getItemCount() != 0) {
                processItems(viewer, ids, item.getItems());
            }
        }
    }

    private void processObject(TreeViewer viewer, Set<CDOID> ids, Object object) {
        InternalCDOObject cdoObject = getCDOObject(object);
        if (cdoObject != null) {
            if (ids == null || ids.contains(cdoObject.cdoID())) {
                processCDOObject(viewer, cdoObject);
            }
        }
    }
}