| /******************************************************************************* |
| * Copyright (c) 2007, 2008 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.provisional.p2.metadata.query; |
| |
| import org.eclipse.equinox.internal.provisional.p2.metadata.IInstallableUnit; |
| import org.eclipse.equinox.internal.provisional.p2.query.Query; |
| |
| /** |
| * A query that searches for {@link IInstallableUnit} instances that have |
| * a property whose value matches the provided value. |
| */ |
| public class IUPropertyQuery extends Query { |
| private String propertyName; |
| private String propertyValue; |
| |
| /** |
| * Creates a new query on the given property name and value. |
| */ |
| public IUPropertyQuery(String propertyName, String propertyValue) { |
| this.propertyName = propertyName; |
| this.propertyValue = propertyValue; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.p2.query2.Query#isMatch(java.lang.Object) |
| */ |
| public boolean isMatch(Object object) { |
| if (!(object instanceof IInstallableUnit)) |
| return false; |
| IInstallableUnit candidate = (IInstallableUnit) object; |
| String value = getProperty(candidate, propertyName); |
| if (value != null && (value.equals(propertyValue) || propertyValue == null)) |
| return true; |
| return false; |
| } |
| |
| protected String getProperty(IInstallableUnit iu, String name) { |
| return iu.getProperty(name); |
| } |
| } |