org.kalypso.zml.ui.table.commands.toolbar.ZmlCommandHideColumns.java Source code

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Here is the source code for org.kalypso.zml.ui.table.commands.toolbar.ZmlCommandHideColumns.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 *
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 *
 *  and
 *
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact:
 *
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *
 *  ---------------------------------------------------------------------------*/
package org.kalypso.zml.ui.table.commands.toolbar;

import java.util.Map;

import jregex.RETokenizer;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.runtime.Status;
import org.eclipse.ui.commands.IElementUpdater;
import org.eclipse.ui.menus.UIElement;
import org.kalypso.commons.java.lang.Objects;
import org.kalypso.contribs.eclipse.core.commands.HandlerUtils;
import org.kalypso.zml.core.table.binding.DataColumn;
import org.kalypso.zml.core.table.model.IZmlModelColumn;
import org.kalypso.zml.core.table.model.utils.IClonedColumn;
import org.kalypso.zml.core.table.model.view.ZmlModelViewport;
import org.kalypso.zml.core.table.schema.DataColumnType;
import org.kalypso.zml.ui.table.IZmlTable;
import org.kalypso.zml.ui.table.commands.ZmlHandlerUtil;

import com.google.common.base.Splitter;
import com.google.common.collect.Iterables;

/**
 * @author Dirk Kuch
 */
public class ZmlCommandHideColumns extends AbstractHandler implements IElementUpdater {

    @Override
    public Object execute(final ExecutionEvent event) {
        final IZmlTable table = ZmlHandlerUtil.getTable(event);
        if (Objects.isNull(table))
            return Status.CANCEL_STATUS;

        final Map parameters = event.getParameters();
        final String[] columnTypes = getColumnTypes(parameters);
        final boolean hide = HandlerUtils.isSelected(event);

        final ZmlModelViewport model = table.getModelViewport();
        for (final String type : columnTypes) {
            model.setVisible(type, hide);
        }

        return Status.OK_STATUS;
    }

    private String[] getColumnTypes(final Map parameters) {
        final String types = (String) parameters.get("column.type"); //$NON-NLS-1$
        if (StringUtils.isEmpty(types))
            return new String[] {};

        final Iterable<String> columns = Splitter.on(";").trimResults().omitEmptyStrings().split(types); //$NON-NLS-1$

        return Iterables.toArray(columns, String.class);
    }

    @Override
    public void updateElement(final UIElement element, final Map parameters) {
        final IZmlTable table = ZmlHandlerUtil.getTable(element);
        if (table == null) {
            // element.setChecked( true );
            return;
        }

        // FIXME resolving zmlmodelviewport at this point is impossible
        final String[] types = getColumnTypes(parameters);

        element.setChecked(!isVisible(table.getModelViewport(), types));
    }

    private boolean isVisible(final ZmlModelViewport viewport, final String[] types) {
        final IZmlModelColumn[] columns = viewport.getColumns();
        for (final IZmlModelColumn column : columns) {
            final DataColumn dataColumn = column.getDataColumn();
            final DataColumnType type = dataColumn.getType();

            final RETokenizer tokenizer = new RETokenizer(IClonedColumn.PATTERN_CLONED_COLUMN_TOKENIZER,
                    type.getId());
            final String parameterType = tokenizer.nextToken();

            if (ArrayUtils.contains(types, parameterType)) {
                return true;
            }
        }

        return false;
    }
}