com.nextep.designer.dbgm.oracle.ui.navigators.OracleClusterContentProvider.java Source code

Introduction

Here is the source code for com.nextep.designer.dbgm.oracle.ui.navigators.OracleClusterContentProvider.java

Source

/*******************************************************************************
 * Copyright (c) 2011 neXtep Software and contributors.
 * All rights reserved.
 *
 * This file is part of neXtep designer.
 *
 * NeXtep designer is free software: you can redistribute it 
 * and/or modify it under the terms of the GNU General Public 
 * License as published by the Free Software Foundation, either 
 * version 3 of the License, or any later version.
 *
 * NeXtep designer is distributed in the hope that it will be 
 * useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contributors:
 *     neXtep Softwares - initial API and implementation
 *******************************************************************************/
package com.nextep.designer.dbgm.oracle.ui.navigators;

import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Collection;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import com.nextep.datadesigner.Designer;
import com.nextep.datadesigner.dbgm.model.IBasicTable;
import com.nextep.datadesigner.model.ChangeEvent;
import com.nextep.datadesigner.model.IEventListener;
import com.nextep.datadesigner.model.IObservable;
import com.nextep.datadesigner.model.ITypedObject;
import com.nextep.datadesigner.vcs.services.VersionHelper;
import com.nextep.designer.core.CorePlugin;
import com.nextep.designer.dbgm.oracle.model.IOracleCluster;
import com.nextep.designer.dbgm.oracle.model.IOracleClusteredTable;
import com.nextep.designer.dbgm.oracle.ui.DBOMUIMessages;
import com.nextep.designer.vcs.ui.impl.TypedNode;
import com.nextep.designer.vcs.ui.model.ITypedNode;
import com.nextep.designer.vcs.ui.services.IWorkspaceUIService;

public class OracleClusterContentProvider implements ITreeContentProvider, IEventListener {

    private final static Log LOGGER = LogFactory.getLog(OracleClusterContentProvider.class);

    @SuppressWarnings("unchecked")
    @Override
    public Object[] getChildren(Object parentElement) {
        if (parentElement instanceof IOracleCluster) {
            final IOracleCluster cluster = (IOracleCluster) parentElement;
            final Collection<Object> elts = new ArrayList<Object>();
            final Collection<IOracleClusteredTable> clusteredTabs = cluster.getClusteredTables();
            if (clusteredTabs != null) {
                for (IOracleClusteredTable t : clusteredTabs) {
                    try {
                        IBasicTable table = (IBasicTable) VersionHelper.getReferencedItem(t.getTableReference());
                        elts.add(table);
                    } catch (RuntimeException e) {
                        LOGGER.warn(MessageFormat.format(DBOMUIMessages.getString("navigator.cluster.tabError"), //$NON-NLS-1$
                                e.getMessage()), e);
                    }
                }
                return TypedNode.buildNodesFromCollection(cluster, (Collection<? extends ITypedObject>) elts, this)
                        .toArray();
            }
        } else if (parentElement instanceof ITypedNode) {
            return ((ITypedNode) parentElement).getChildren().toArray();
        }
        return null;
    }

    @Override
    public Object getParent(Object element) {
        return null;
    }

    @Override
    public boolean hasChildren(Object element) {
        if (element instanceof IOracleCluster) {
            return true;
        } else if (element instanceof ITypedNode) {
            return !((ITypedNode) element).getChildren().isEmpty();
        }
        return false;
    }

    @Override
    public Object[] getElements(Object inputElement) {
        return getChildren(inputElement);
    }

    @Override
    public void dispose() {
        Designer.getListenerService().unregisterListeners(this);
    }

    @Override
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

    }

    @Override
    public void handleEvent(ChangeEvent event, IObservable source, Object data) {
        CorePlugin.getService(IWorkspaceUIService.class).refreshNavigatorFor(source);
    }

}