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/*******************************************************************************
* Copyright (c) 2007, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* EclipseSource - ongoing development
* Rapicorp, Inc (Pascal Rapicault) - Bug 394156 - Add support for updates from one namespace to another
*******************************************************************************/
package org.eclipse.equinox.internal.p2.ui.query;
import java.util.Iterator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.equinox.internal.p2.ui.ProvUI;
import org.eclipse.equinox.internal.p2.ui.ProvUIMessages;
import org.eclipse.equinox.internal.p2.ui.model.*;
import org.eclipse.equinox.p2.engine.IProfile;
import org.eclipse.equinox.p2.engine.query.UserVisibleRootQuery;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.p2.query.IQueryable;
import org.eclipse.equinox.p2.query.QueryUtil;
/**
* A wrapper that examines available IU's and wraps them in an
* element representing either a category or a regular IU.
*
* @since 3.4
*/
public class AvailableIUWrapper extends QueriedElementWrapper {
private boolean makeCategories;
private IProfile profile;
private boolean hideInstalledIUs = false;
private boolean drillDownChild = false;
public AvailableIUWrapper(IQueryable<?> queryable, Object parent, boolean makeCategories, boolean makeDrillDownChild) {
super(queryable, parent);
this.makeCategories = makeCategories;
this.drillDownChild = makeDrillDownChild;
}
public void markInstalledIUs(IProfile targetProfile, boolean hideInstalled) {
this.profile = targetProfile;
hideInstalledIUs = hideInstalled;
}
class InformationCache {
Object item = null;
boolean isUpdate = false;
boolean isInstalled = false;
boolean isPatch = false;
public InformationCache(Object item, boolean isUpdate, boolean isInstalled, boolean isPatch) {
this.item = item;
this.isUpdate = isUpdate;
this.isInstalled = isInstalled;
this.isPatch = isPatch;
}
}
InformationCache cache = null;
@Override
protected boolean shouldWrap(Object match) {
IInstallableUnit iu = ProvUI.getAdapter(match, IInstallableUnit.class);
cache = computeIUInformation(iu); // Cache the result
// if we are hiding, hide anything that is the same iu or older
if (hideInstalledIUs && cache.isInstalled && !cache.isUpdate) {
emptyExplanationString = ProvUIMessages.AvailableIUWrapper_AllAreInstalled;
emptyExplanationSeverity = IStatus.INFO;
emptyExplanationDescription = ProvUIMessages.IUViewQueryContext_AllAreInstalledDescription;
return false;
}
return true;
}
/**
* Compute information about this IU. This computes whether or
* not this IU is installed and / or updated.
*/
private InformationCache computeIUInformation(IInstallableUnit iu) {
boolean isUpdate = false;
boolean isInstalled = false;
boolean isPatch = iu == null ? false : QueryUtil.isPatch(iu);
if (profile != null && iu != null) {
isInstalled = !profile.query(QueryUtil.createIUQuery(iu), null).isEmpty();
Iterator<IInstallableUnit> iter = profile.query(new UserVisibleRootQuery(), null).iterator();
while (iter.hasNext()) {
IInstallableUnit installed = iter.next();
if (iu.getUpdateDescriptor() != null && iu.getUpdateDescriptor().isUpdateOf(installed) && (!iu.getId().equals(installed.getId()) || installed.getVersion().compareTo(iu.getVersion()) < 0)) {
isUpdate = true;
break;
}
}
}
return new InformationCache(iu, isUpdate, isInstalled, isPatch);
}
@Override
protected Object wrap(Object item) {
IInstallableUnit iu = ProvUI.getAdapter(item, IInstallableUnit.class);
boolean isUpdate = false;
boolean isInstalled = false;
boolean isPatch = false;
if (cache != null && cache.item == item) {
// This cache should always be valide, since accept is called before transformItem
isUpdate = cache.isUpdate;
isInstalled = cache.isInstalled;
isPatch = cache.isPatch;
} else {
InformationCache iuInformation = computeIUInformation(iu);
isUpdate = iuInformation.isUpdate;
isInstalled = iuInformation.isInstalled;
isPatch = iuInformation.isPatch;
}
// subclass already made this an element, just set the install flag
if (item instanceof AvailableIUElement) {
AvailableIUElement element = (AvailableIUElement) item;
element.setIsInstalled(isInstalled);
element.setIsUpdate(isUpdate);
element.setIsPatch(isPatch);
return super.wrap(item);
}
// If it's not an IU or element, we have nothing to do here
if (!(item instanceof IInstallableUnit))
return super.wrap(item);
// We need to make an element
if (makeCategories && isCategory(iu))
return super.wrap(new CategoryElement(parent, iu));
IIUElement element = makeDefaultElement(iu);
if (element instanceof AvailableIUElement) {
AvailableIUElement availableElement = (AvailableIUElement) element;
availableElement.setIsInstalled(isInstalled);
availableElement.setIsUpdate(isUpdate);
availableElement.setIsPatch(isPatch);
}
return super.wrap(element);
}
protected IIUElement makeDefaultElement(IInstallableUnit iu) {
if (parent instanceof AvailableIUElement)
drillDownChild = ((AvailableIUElement) parent).shouldShowChildren();
return new AvailableIUElement(parent, iu, null, drillDownChild);
}
protected boolean isCategory(IInstallableUnit iu) {
return QueryUtil.isCategory(iu);
}
protected boolean makeCategory() {
return makeCategories;
}
}
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