| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.felix.resolver.test.util; |
| |
| import java.util.Comparator; |
| |
| import org.apache.felix.resolver.Util; |
| import org.osgi.framework.Version; |
| import org.osgi.framework.namespace.BundleNamespace; |
| import org.osgi.framework.namespace.IdentityNamespace; |
| import org.osgi.framework.namespace.PackageNamespace; |
| import org.osgi.framework.wiring.BundleCapability; |
| import org.osgi.resource.Capability; |
| |
| public class CandidateComparator implements Comparator<Capability> |
| { |
| public int compare(Capability cap1, Capability cap2) |
| { |
| int c = 0; |
| // Always prefer system bundle |
| if (cap1 instanceof BundleCapability && !(cap2 instanceof BundleCapability)) { |
| c = -1; |
| } else if (!(cap1 instanceof BundleCapability) && cap2 instanceof BundleCapability) { |
| c = 1; |
| } |
| // Compare revision capabilities. |
| if ((c == 0) && cap1.getNamespace().equals(BundleNamespace.BUNDLE_NAMESPACE)) |
| { |
| c = ((Comparable) cap1.getAttributes().get(BundleNamespace.BUNDLE_NAMESPACE)) |
| .compareTo(cap2.getAttributes().get(BundleNamespace.BUNDLE_NAMESPACE)); |
| if (c == 0) |
| { |
| Version v1 = (!cap1.getAttributes().containsKey(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap1.getAttributes().get(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE); |
| Version v2 = (!cap2.getAttributes().containsKey(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap2.getAttributes().get(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE); |
| // Compare these in reverse order, since we want |
| // highest version to have priority. |
| c = compareVersions(v2, v1); |
| } |
| } |
| // Compare package capabilities. |
| else if ((c == 0) && cap1.getNamespace().equals(PackageNamespace.PACKAGE_NAMESPACE)) |
| { |
| c = ((Comparable) cap1.getAttributes().get(PackageNamespace.PACKAGE_NAMESPACE)) |
| .compareTo(cap2.getAttributes().get(PackageNamespace.PACKAGE_NAMESPACE)); |
| if (c == 0) |
| { |
| Version v1 = (!cap1.getAttributes().containsKey(PackageNamespace.CAPABILITY_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap1.getAttributes().get(PackageNamespace.CAPABILITY_VERSION_ATTRIBUTE); |
| Version v2 = (!cap2.getAttributes().containsKey(PackageNamespace.CAPABILITY_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap2.getAttributes().get(PackageNamespace.CAPABILITY_VERSION_ATTRIBUTE); |
| // Compare these in reverse order, since we want |
| // highest version to have priority. |
| c = compareVersions(v2, v1); |
| // if same version, rather compare on the bundle version |
| if (c == 0) |
| { |
| v1 = (!cap1.getAttributes().containsKey(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap1.getAttributes().get(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE); |
| v2 = (!cap2.getAttributes().containsKey(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap2.getAttributes().get(BundleNamespace.CAPABILITY_BUNDLE_VERSION_ATTRIBUTE); |
| // Compare these in reverse order, since we want |
| // highest version to have priority. |
| c = compareVersions(v2, v1); |
| } |
| } |
| } |
| // Compare feature capabilities |
| else if ((c == 0) && cap1.getNamespace().equals(IdentityNamespace.IDENTITY_NAMESPACE)) |
| { |
| c = ((Comparable) cap1.getAttributes().get(IdentityNamespace.IDENTITY_NAMESPACE)) |
| .compareTo(cap2.getAttributes().get(IdentityNamespace.IDENTITY_NAMESPACE)); |
| if (c == 0) |
| { |
| Version v1 = (!cap1.getAttributes().containsKey(IdentityNamespace.CAPABILITY_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap1.getAttributes().get(IdentityNamespace.CAPABILITY_VERSION_ATTRIBUTE); |
| Version v2 = (!cap2.getAttributes().containsKey(IdentityNamespace.CAPABILITY_VERSION_ATTRIBUTE)) |
| ? Version.emptyVersion |
| : (Version) cap2.getAttributes().get(IdentityNamespace.CAPABILITY_VERSION_ATTRIBUTE); |
| // Compare these in reverse order, since we want |
| // highest version to have priority. |
| c = compareVersions(v2, v1); |
| } |
| } |
| if (c == 0) { |
| // We just want to have a deterministic heuristic |
| String n1 = cap1.toString(); |
| String n2 = cap2.toString(); |
| c = n1.compareTo(n2); |
| if (c == 0) { |
| n1 = cap1.getResource().toString(); |
| n2 = cap2.getResource().toString(); |
| c = n1.compareTo(n2); |
| } |
| } |
| return c; |
| } |
| |
| private int compareVersions(Version v1, Version v2) { |
| int c = v1.getMajor() - v2.getMajor(); |
| if (c != 0) { |
| return c; |
| } |
| c = v1.getMinor() - v2.getMinor(); |
| if (c != 0) { |
| return c; |
| } |
| c = v1.getMicro() - v2.getMicro(); |
| if (c != 0) { |
| return c; |
| } |
| String q1 = cleanQualifierForComparison(v1.getQualifier()); |
| String q2 = cleanQualifierForComparison(v2.getQualifier()); |
| return q1.compareTo(q2); |
| } |
| |
| private String cleanQualifierForComparison(String qualifier) { |
| return qualifier.replaceAll("(redhat-[0-9]{3})([0-9]{3})", "$1-$2"); |
| } |
| } |