RubyInstanceProviderImpl.java

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package org.netbeans.modules.glassfish.jruby;

import java.util.List;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import org.netbeans.modules.ruby.railsprojects.server.spi.RubyInstance;
import org.netbeans.modules.ruby.railsprojects.server.spi.RubyInstanceProvider;
import org.netbeans.modules.glassfish.spi.ServerUtilities;
import org.netbeans.spi.server.ServerInstanceProvider;
import org.openide.util.ChangeSupport;


/**
 *
 * @author Peter Williams
 */
public final class RubyInstanceProviderImpl implements RubyInstanceProvider, ChangeListener {

    // XXX not real happy about the separation of providers for V3 vs V3 prelude
    // but that's what we have for now.
    private static final RubyInstanceProviderImpl v3FullSupport = createImpl(ServerUtilities.getEe6Utilities());
    private static final RubyInstanceProviderImpl v3PreludeSupport = createImpl(ServerUtilities.getPreludeUtilities());

    private static RubyInstanceProviderImpl createImpl(ServerUtilities serverUtilities) {
        return serverUtilities != null ? new RubyInstanceProviderImpl(serverUtilities) : null;
    }

    private final ChangeSupport support = new ChangeSupport(this);
    private ServerUtilities serverUtilities;
    
    private RubyInstanceProviderImpl(ServerUtilities serverUtilities) {
        this.serverUtilities = serverUtilities;
        ServerInstanceProvider provider = serverUtilities.getServerProvider();
        provider.addChangeListener(this);
    }

    public static RubyInstanceProvider getV3Provider() {
        return v3FullSupport;
    }

    public static RubyInstanceProvider getV3PreludeProvider() {
        return v3PreludeSupport;
    }

    // Additional interesting API's
    public boolean hasServer(String uri) {
        return getInstance(uri) != null;
    }
    
    // ------------------------------------------------------------------------
    // RubyInstanceProvider interface implementation
    // ------------------------------------------------------------------------
    public List<? extends RubyInstance> getInstances() {
        return serverUtilities.getInstancesByCapability(RubyInstance.class);
    }

    public RubyInstance getInstance(String uri) {
        return serverUtilities.getInstanceByCapability(uri, RubyInstance.class);
    }

    public void addChangeListener(ChangeListener listener) {
        support.addChangeListener(listener);
    }

    public void removeChangeListener(ChangeListener listener) {
        support.removeChangeListener(listener);
    }

    // ------------------------------------------------------------------------
    // ChangeListener implementation
    // ------------------------------------------------------------------------
    public void stateChanged(ChangeEvent e) {
        // Forward change event, regardless of whether ruby instance list has 
        // changed or not.  It's not worth the effort to determine that.
        support.fireChange();
    }

}