MultiDataSourceAction.java

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 * 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.uisupport.UISupport;
import java.awt.event.ActionEvent;
import java.util.Set;

/**
 * Abstract DataSourceAction which can be used as a basis for any action available (enabled) just for one or more selected DataSources in Applications window..
 *
 * @author Jiri Sedlacek
 */
public abstract class MultiDataSourceAction<X extends DataSource> extends DataSourceAction<X> {
        
    /**
     * Creates new instance of MultiDataSourceAction available for defined DataSource type.
     * 
     * @param scope DataSource type for the action.
     */
    public MultiDataSourceAction(Class<X> scope) {
       super(scope);
    }
        
        
    public final void actionPerformed(ActionEvent e) {
        if (isEnabled()) {
            actionPerformed(ActionUtils.getSelectedDataSources(getScope()), e);
        } else {
            notifyCannotPerform();
        }
    }
        
        
    /**
     * Performs the action for the DataSources.
     * 
     * @param dataSources Set of DataSources for which to perform the action.
     * @param actionEvent ActionEvent for the action.
     */
    protected abstract void actionPerformed(Set<X> dataSources, ActionEvent actionEvent);
        
    /**
     * Returns true if the action is available (enabled) for the DataSources, false otherwise.
     * 
     * @param dataSources Set of DataSources for the action.
     * @return true if the action is available (enabled) for the DataSources, false otherwise.
     */
    protected abstract boolean isEnabled(Set<X> dataSources);
        
    protected void updateState(Set<X> selectedDataSources) {
        final boolean isEnabled = selectedDataSources.isEmpty() ? false : isEnabled(selectedDataSources);

        UISupport.runInEventDispatchThreadAndWait(new Runnable() {
            public void run() { setEnabled(isEnabled); }
        });
    }
        
 }