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package org.openide.windows;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Map;

/** Opens a top component.
 *
 * @author Jaroslav Tulach
 */
final class OpenComponentAction implements ActionListener {
    private TopComponent component;
    private final Map<?,?> map;

    OpenComponentAction(TopComponent component) {
        assert component != null; //to diagnose #185355
        this.component = component;
        map = null;
    }
    
    OpenComponentAction(Map<?,?> map) {
        this.map = map;
    }
    
    private TopComponent getTopComponent() {
        assert EventQueue.isDispatchThread();
        if (component != null) {
            return component;
        }
        TopComponent c = null;
        Object id = map.get("preferredID"); // NOI18N
        if (id instanceof String) {
            c = WindowManager.getDefault().findTopComponent((String)id);
        }
        if (c == null) {
            c = (TopComponent)map.get("component");
        }
        if (id != null) {
            component = c;
        }
        return c;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        TopComponent win = getTopComponent();
        if( null == win ) {
            throw new IllegalStateException( "Cannot find TopComponent with preferredID " 
                    + map.get("preferredID") + ", see IDE log for more details." ); //NOI18N
        }
        win.open();
        win.requestActive();
    }
}