1 /*******************************************************************************
2 * Copyright (c) 2010 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
9 * IBM Corporation - initial API and implementation
10 * Cloudsmith Inc. - converted into expression based query
11 *******************************************************************************/
12 package org.eclipse.equinox.internal.p2.ui.query;
14 import org.eclipse.equinox.p2.query.ExpressionMatchQuery;
16 import org.eclipse.equinox.p2.metadata.IInstallableUnit;
17 import org.eclipse.equinox.p2.metadata.expression.ExpressionUtil;
18 import org.eclipse.equinox.p2.metadata.expression.IExpression;
22 * A query matching every {@link IInstallableUnit} that is meets
23 * any requirement of the specified IU. This query is used when
24 * drilling down to show the children of an available IU. For example,
25 * when installing an IU, we want to show all the IU's that are in the provisioning
26 * plan that are required by this IU. This is usually used in combination with
27 * other queries (such as show all Required IUs which also are visible to
28 * the user as available).
32 public class RequiredIUsQuery extends ExpressionMatchQuery<IInstallableUnit> {
34 private static final IExpression expression = ExpressionUtil.parse("$0.exists(rc | this ~= rc)"); //$NON-NLS-1$
37 * Creates a new query that will return any IU that meets any
38 * one of the requirements of the specified IU.
40 * @param iu The IU whose requirements are to be checked
42 public RequiredIUsQuery(IInstallableUnit iu) {
43 super(IInstallableUnit.class, expression, iu.getRequirements());