| /******************************************************************************* |
| * Copyright (c) 2003, 2006 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.osgi.framework.internal.core; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import org.eclipse.osgi.framework.util.KeyedElement; |
| |
| public abstract class PackageSource implements KeyedElement { |
| protected String id; |
| |
| public PackageSource(String id) { |
| this.id = id.intern(); |
| } |
| |
| public String getId() { |
| return id; |
| } |
| |
| public abstract SingleSourcePackage[] getSuppliers(); |
| |
| public boolean compare(KeyedElement other) { |
| return id.equals(((PackageSource) other).getId()); |
| } |
| |
| public int getKeyHashCode() { |
| return id.hashCode(); |
| } |
| |
| public Object getKey() { |
| return id; |
| } |
| |
| public boolean isNullSource() { |
| return false; |
| } |
| |
| public boolean isFriend(String symbolicName) { |
| return true; |
| } |
| |
| public abstract Class loadClass(String name) throws ClassNotFoundException; |
| public abstract URL getResource(String name); |
| public abstract Enumeration getResources(String name) throws IOException; |
| |
| //TODO See how this relates with FilteredSourcePackage. Overwriting or doing a double dispatch might be good. |
| // This is intentionally lenient; we don't force all suppliers to match (only one) |
| // it is better to get class cast exceptions in split package cases than miss an event |
| public boolean hasCommonSource(PackageSource other) { |
| if (other == null) |
| return false; |
| if (this == other) |
| return true; |
| SingleSourcePackage[] suppliers1 = getSuppliers(); |
| SingleSourcePackage[] suppliers2 = other.getSuppliers(); |
| if (suppliers1 == null || suppliers2 == null) |
| return false; |
| // This will return true if the specified source has at least one |
| // of the suppliers of this source. |
| for (int i = 0; i < suppliers1.length; i++) |
| for (int j = 0; j < suppliers2.length; j++) |
| if (suppliers2[j].equals(suppliers1[i])) |
| return true; |
| return false; |
| } |
| } |