| /******************************************************************************* |
| * 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 |
| * 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); |
| } |
| } |