com.mercatis.lighthouse3.status.ui.LighthouseStatusDecorator.java Source code

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Here is the source code for com.mercatis.lighthouse3.status.ui.LighthouseStatusDecorator.java

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/*
 * Copyright 2011 mercatis Technologies AG
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.mercatis.lighthouse3.status.ui;

import java.util.HashMap;
import java.util.Map;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ILightweightLabelDecorator;
import org.eclipse.ui.PlatformUI;
import org.osgi.service.event.Event;
import org.osgi.service.event.EventHandler;
import com.mercatis.lighthouse3.domainmodel.environment.StatusCarrier;
import com.mercatis.lighthouse3.domainmodel.status.Status;
import com.mercatis.lighthouse3.domainmodel.status.StatusHistogram;
import com.mercatis.lighthouse3.services.Services;
import com.mercatis.lighthouse3.ui.common.base.CommonBaseActivator;
import com.mercatis.lighthouse3.ui.environment.base.model.LighthouseDomain;

public class LighthouseStatusDecorator implements ILightweightLabelDecorator, EventHandler {

    public static final String id = "com.mercatis.lighthouse3.status.ui.decorator.statuslights";

    public static enum Phase {
        GREEN, ORANGE, RED, WHITE
    }

    public static enum Size {
        x8, x16
    }

    private static Map<Phase, Map<Size, ImageDescriptor>> descriptors;
    static {
        descriptors = new HashMap<Phase, Map<Size, ImageDescriptor>>();
        for (Phase phase : Phase.values()) {
            Map<Size, ImageDescriptor> s = new HashMap<Size, ImageDescriptor>();
            descriptors.put(phase, s);
            switch (phase) {
            case GREEN:
                s.put(Size.x8, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/green_x8.png")));
                s.put(Size.x16, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/green_x16.png")));
                break;
            case ORANGE:
                s.put(Size.x8, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/orange_x8.png")));
                s.put(Size.x16, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/orange_x16.png")));
                break;
            case RED:
                s.put(Size.x8, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/red_x8.png")));
                s.put(Size.x16, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/red_x16.png")));
                break;
            case WHITE:
                s.put(Size.x8, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/white_x8.png")));
                s.put(Size.x16, ImageDescriptor
                        .createFromURL(LighthouseStatusDecorator.class.getResource("/icons/white_x16.png")));
                break;
            }
        }
    }

    public LighthouseStatusDecorator() {
        String filter = "(type=statusAggregationChanged)";
        Services.registerEventHandler(this, "com/mercatis/lighthouse3/event/*", filter);
    }

    public void decorate(Object element, IDecoration decoration) {
        LighthouseDomain lighthouseDomain = CommonBaseActivator.getPlugin().getDomainService()
                .getLighthouseDomainByEntity(element);
        if (element instanceof StatusCarrier) {
            StatusHistogram sh = CommonBaseActivator.getPlugin().getStatusService()
                    .getStatusHistogramForObject(lighthouseDomain, element);
            if (sh.getError() > 0) {
                decoration.addOverlay(getImageDescriptorForStatus(Status.ERROR, Size.x8), IDecoration.BOTTOM_LEFT);
                decoration.addSuffix(" " + sh.getError() + " status erroneous");
            } else if (sh.getStale() > 0) {
                decoration.addOverlay(getImageDescriptorForStatus(Status.STALE, Size.x8), IDecoration.BOTTOM_LEFT);
                decoration.addSuffix(" " + sh.getStale() + " status stale");
            } else if (sh.getOk() > 0) {
                decoration.addOverlay(getImageDescriptorForStatus(Status.OK, Size.x8), IDecoration.BOTTOM_LEFT);
                decoration.addSuffix(" " + sh.getOk() + " status ok");
            } else if (sh.getNone() > 0) {
                decoration.addOverlay(getImageDescriptorForStatus(Status.NONE, Size.x8), IDecoration.BOTTOM_LEFT);
            }
        }
    }

    public void addListener(ILabelProviderListener listener) {
    }

    public void dispose() {
        Services.unregisterEventHandler(this);
    }

    public boolean isLabelProperty(Object element, String property) {
        return false;
    }

    public void removeListener(ILabelProviderListener listener) {
    }

    public static ImageDescriptor getImageDescriptorForStatus(int status, Size size) {
        switch (status) {
        case Status.STALE:
            return getImageDescriptor(Phase.ORANGE, size);
        case Status.OK:
            return getImageDescriptor(Phase.GREEN, size);
        case Status.ERROR:
            return getImageDescriptor(Phase.RED, size);
        case Status.NONE:
        default:
            return getImageDescriptor(Phase.WHITE, size);
        }
    }

    public static ImageDescriptor getImageDescriptor(Phase phase, Size size) {
        return descriptors.get(phase).get(size);
    }

    /* (non-Javadoc)
     * @see org.osgi.service.event.EventHandler#handleEvent(org.osgi.service.event.Event)
     */
    public void handleEvent(Event event) {
        PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
            public void run() {
                PlatformUI.getWorkbench().getDecoratorManager().update(LighthouseStatusDecorator.id);
            }
        });
    }
}