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/*******************************************************************************
* Copyright (c) 2008, 2009 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
*******************************************************************************/
package org.eclipse.equinox.internal.p2.director;
import org.eclipse.equinox.internal.provisional.p2.metadata.IInstallableUnitPatch;
import org.eclipse.equinox.internal.provisional.p2.metadata.query.MatchQuery;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.p2.metadata.IRequirement;
/**
* A query that accepts any patch that applies to a given installable unit.
*/
public class ApplicablePatchQuery extends MatchQuery<IInstallableUnit> {
IInstallableUnit iu;
/**
* Creates a new patch query on the given installable unit. Patches that can
* be applied to this unit will be accepted as matches by the query.
* @param iu The unit to compare patches against
*/
public ApplicablePatchQuery(IInstallableUnit iu) {
this.iu = iu;
}
public boolean isMatch(IInstallableUnit candidate) {
if (!(candidate instanceof IInstallableUnitPatch))
return false;
IInstallableUnitPatch patchIU = (IInstallableUnitPatch) candidate;
IRequirement[][] scopeDescription = patchIU.getApplicabilityScope();
if (scopeDescription.length == 0)
return true;
for (int i = 0; i < scopeDescription.length; i++) {
int matchedScopeEntry = scopeDescription[i].length;
for (int j = 0; j < scopeDescription[i].length; j++) {
if (iu.satisfies(scopeDescription[i][j]))
matchedScopeEntry--;
}
if (matchedScopeEntry == 0)
return true;
}
return false;
}
}
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