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/*******************************************************************************
* Copyright (c) 2008, 2010 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
* Cloudsmith Inc. - converted into expression based query
*******************************************************************************/
package org.eclipse.equinox.internal.p2.metadata.query;
import org.eclipse.equinox.p2.query.ExpressionMatchQuery;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.p2.metadata.IInstallableUnitPatch;
import org.eclipse.equinox.p2.metadata.expression.*;
/**
* A query that finds all IUs that are considered an "Update" of the
* specified IU.
*/
public final class UpdateQuery extends ExpressionMatchQuery<IInstallableUnit> {
private static final IExpression expr1;
private static final IExpression expr2;
static {
IExpressionParser parser = ExpressionUtil.getParser();
// This expression is used in case the updateFrom is an IInstallableUnitPatch
//
expr1 = parser.parse("$0 ~= updateDescriptor && ($0.id != id || $0.version < version)"); //$NON-NLS-1$
// When updateFrom is not an IInstallableUnitPatch, we need to do one of two things depending
// on if the current item is an InstallableUnitPatch or not.
//
expr2 = parser.parse("this ~= class('org.eclipse.equinox.p2.metadata.IInstallableUnitPatch')" + // //$NON-NLS-1$
"? $0 ~= lifeCycle" + // //$NON-NLS-1$
": $0 ~= updateDescriptor && ($0.id != id || $0.version < version)"); //$NON-NLS-1$
}
public UpdateQuery(IInstallableUnit updateFrom) {
super(IInstallableUnit.class, updateFrom instanceof IInstallableUnitPatch ? expr1 : expr2, updateFrom, IInstallableUnitPatch.class);
}
}
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