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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package com.sun.tools.visualvm.core.ui.actions;
import com.sun.tools.visualvm.core.datasource.DataSource;
import com.sun.tools.visualvm.core.datasupport.Utils;
import com.sun.tools.visualvm.core.explorer.ExplorerSupport;
import java.util.Collections;
import java.util.Set;
/**
* Utils class providing useful methods mostly for Actions implementation.
*
* @author Jiri Sedlacek
*/
public final class ActionUtils {
/**
* Returns selected DataSource is exactly one DataSource is selected in Applications window, null otherwise.
* @return selected DataSource is exactly one DataSource is selected in Applications window, null otherwise.
*/
public static DataSource getSelectedDataSource() {
Set<DataSource> selectedDataSources = getSelectedDataSources();
return (selectedDataSources.size() == 1 ? selectedDataSources.iterator().next() : null);
}
/**
* Returns selected DataSource is exactly one DataSource of a certain type is selected in Applications window, null otherwise.
*
* @param <X> any DataSource.
* @param scope DataSource type.
* @return selected DataSource is exactly one DataSource of a certain type is selected in Applications window, null otherwise.
*/
public static <X extends DataSource> X getSelectedDataSource(Class<X> scope) {
Set<X> selectedDataSources = getSelectedDataSources(scope);
return (selectedDataSources.size() == 1 ? selectedDataSources.iterator().next() : null);
}
/**
* Returns Set of selected DataSources in Applications window or empty Set for no selection.
*
* @return Set of selected DataSources in Applications window or empty Set for no selection.
*/
public static Set<DataSource> getSelectedDataSources() {
Set<DataSource> selectedDataSources = ExplorerSupport.sharedInstance().getSelectedDataSources();
return selectedDataSources;
}
/**
* Returns Set of selected DataSources of a certain type in Applications window or empty Set if no DataSource of this type is selected.
*
* @param <X> any DataSource.
* @param scope DataSource type.
* @return Set of selected DataSources of a certain type in Applications window or empty Set if no DataSource of this type is selected.
*/
public static <X extends DataSource> Set<X> getSelectedDataSources(Class<X> scope) {
Set<DataSource> selectedDataSources = getSelectedDataSources();
Set<X> filteredSelectedDataSources = Utils.getFilteredSet(selectedDataSources, scope);
return selectedDataSources.size() == filteredSelectedDataSources.size() ?
filteredSelectedDataSources : Collections.EMPTY_SET;
}
}