com.nextep.designer.sqlgen.ui.impl.SQLSearchTreeNewContentProvider.java Source code

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Here is the source code for com.nextep.designer.sqlgen.ui.impl.SQLSearchTreeNewContentProvider.java

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/*******************************************************************************
 * 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.sqlgen.ui.impl;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.search.ui.text.Match;
import com.nextep.designer.vcs.model.IVersionContainer;
import com.nextep.designer.vcs.model.IVersionable;

public class SQLSearchTreeNewContentProvider implements ITreeContentProvider {
    private SQLSearchResult result;
    private Viewer viewer;
    private Map<IVersionContainer, List<Object>> elements;

    public SQLSearchTreeNewContentProvider(Viewer treeViewer) {
        this.viewer = treeViewer;
    }

    @Override
    public Object[] getChildren(Object parentElement) {
        if (parentElement instanceof IVersionContainer) {
            List<?> list = elements.get(parentElement);
            if (list != null) {
                return list.toArray();
            }
            return null;
        } else if (parentElement instanceof IVersionable<?>) {
            return result.getMatches(parentElement);
        }
        return null;
    }

    @Override
    public Object getParent(Object element) {
        if (element instanceof IVersionContainer) {
            return null;
        } else if (element instanceof IVersionable<?>) {
            return ((IVersionable<?>) element).getContainer();
        } else if (element instanceof Match) {
            return ((Match) element).getElement();
        }
        return null;
    }

    @Override
    public boolean hasChildren(Object element) {
        if (element instanceof IVersionContainer) {
            return elements.containsKey(element);
        } else if (element instanceof IVersionable<?>) {
            List<?> list = elements.get(((IVersionable<?>) element).getContainer());
            if (list != null) {
                return list.contains(element);
            }
        }
        return false;
    }

    @Override
    public Object[] getElements(Object inputElement) {
        return elements.keySet().toArray();
    }

    @Override
    public void dispose() {
    }

    @Override
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        if (newInput instanceof SQLSearchResult) {
            result = (SQLSearchResult) newInput;
            elements = new HashMap<IVersionContainer, List<Object>>();
            elementsChanged(result.getElements(), false);
        }
    }

    public synchronized void elementsChanged(Object[] updatedElements, boolean updateViewer) {
        for (Object o : updatedElements) {
            if (o instanceof IVersionable<?>) {
                final IVersionContainer parentContainer = ((IVersionable<?>) o).getContainer();
                List<Object> objs = elements.get(parentContainer);
                if (objs == null) {
                    objs = new ArrayList<Object>();
                    elements.put(parentContainer, objs);
                }
                objs.add(o);
                if (updateViewer) {
                    if (viewer instanceof TreeViewer) {
                        TreeViewer treeViewer = (TreeViewer) viewer;
                        treeViewer.add(parentContainer, o);
                        // For all matches found
                        for (Match match : result.getMatches(o)) {
                            treeViewer.add(o, match);
                        }
                    } else if (viewer instanceof TableViewer) {
                        TableViewer tabViewer = (TableViewer) viewer;
                        tabViewer.add(o);
                    }
                }
            }
        }
        viewer.refresh();
    }
}