Merge "Bug 1029: Remove dead code: p2site"
[controller.git] / opendaylight / adsal / northbound / bundlescanner / implementation / src / main / java / org / opendaylight / controller / northbound / bundlescanner / internal / BundleInfo.java
1 /**
2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6  * and is available at http://www.eclipse.org/legal/epl-v10.html
7  */
8
9 package org.opendaylight.controller.northbound.bundlescanner.internal;
10
11 import java.util.ArrayList;
12 import java.util.Collection;
13 import java.util.Collections;
14 import java.util.Dictionary;
15 import java.util.HashSet;
16 import java.util.List;
17 import java.util.Map;
18 import java.util.Set;
19 import java.util.regex.Pattern;
20
21 import org.osgi.framework.Bundle;
22 import org.osgi.framework.Constants;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
25
26 /**
27  * BundleInfo holds information related to the bundle obtained during the
28  * bundle scan process.
29  */
30 /*package*/ class BundleInfo {
31     private static final Logger LOGGER = LoggerFactory.getLogger(BundleInfo.class);
32
33     private final Bundle bundle;
34     private final Map<String, Set<String>> annotatedClasses;
35     private final Set<String> exportPkgs;
36     private final Set<String> importPkgs;
37
38     public BundleInfo(Bundle bundle, Map<String, Set<String>> classes) {
39         this.bundle = bundle;
40         this.annotatedClasses = classes;
41         Dictionary<String, String> dict = bundle.getHeaders();
42         this.importPkgs = parsePackages(dict.get(Constants.IMPORT_PACKAGE));
43         this.exportPkgs = parsePackages(dict.get(Constants.EXPORT_PACKAGE));
44     }
45
46     @Override
47     public String toString() {
48         StringBuilder sb = new StringBuilder(super.toString());
49         sb.append("{name:").append(bundle.getSymbolicName())
50           .append(" id:").append(getId())
51           .append(" annotated-classes:").append(annotatedClasses)
52           .append(" imports:").append(importPkgs)
53           .append(" exports:").append(exportPkgs).append("}");
54         return sb.toString();
55     }
56
57     public Bundle getBundle() {
58         return bundle;
59     }
60
61     public long getId() {
62         return bundle.getBundleId();
63     }
64
65     public List<Class<?>> getAnnotatedClasses(Pattern pattern, Set<String> excludes) {
66         List<String> result = new ArrayList<String>();
67         for (Map.Entry<String, Set<String>> entry : annotatedClasses.entrySet()) {
68             if (matches(pattern, entry.getValue())) {
69                 result.add(entry.getKey());
70             }
71         }
72         return BundleScanner.loadClasses(result, bundle, excludes);
73     }
74
75     private boolean matches(Pattern pattern, Set<String> values) {
76         if (pattern == null) return true;
77         //LOGGER.debug("Matching: {} {}", pattern.toString(), values);
78         for (String s : values) {
79             if (pattern.matcher(s).find()) return true;
80         }
81         return false;
82     }
83
84     /**
85      * Get classes with annotations matching a pattern
86      *
87      * @param allbundles - all bundles
88      * @param pattern - annotation pattern to match
89      * @param initBundle - the bundle which initiated this call
90      * @param excludes - set of class names to be excluded
91      *
92      * @return list of annotated classes matching the pattern
93      */
94     public List<Class<?>> getAnnotatedClasses(
95             Collection<BundleInfo> allbundles,
96             Pattern pattern, Bundle initBundle,
97             Set<String> excludes)
98     {
99         List<Class<?>> classes = getAnnotatedClasses(pattern, excludes);
100         processAnnotatedClassesInternal(this, allbundles, pattern,
101                 new HashSet<BundleInfo>(), classes, initBundle, excludes);
102         return classes;
103     }
104
105     private List<String> getExportedAnnotatedClasses(Pattern pattern) {
106         List<String> classes = new ArrayList<String>();
107         for (Map.Entry<String, Set<String>> entry : annotatedClasses.entrySet()) {
108             String cls = entry.getKey();
109             int idx = cls.lastIndexOf(".");
110             String pkg = (idx == -1 ? "" : cls.substring(0, idx));
111             // for a class to match, the package has to be exported and
112             // annotations should match the given pattern
113             if (exportPkgs.contains(pkg) && matches(pattern, entry.getValue())) {
114                 classes.add(cls);
115             }
116         }
117         if (LOGGER.isDebugEnabled()) {
118             LOGGER.debug("Found in bundle:{} exported classes:[{}]",
119                     getBundle().getSymbolicName(), classes);
120         }
121         return classes;
122     }
123
124     private static void processAnnotatedClassesInternal(
125             BundleInfo target,
126             Collection<BundleInfo> bundlesToScan,
127             Pattern pattern,
128             Collection<BundleInfo> visited,
129             List<Class<?>> classes,
130             Bundle initBundle, Set<String> excludes)
131     {
132         for (BundleInfo other : bundlesToScan) {
133             if (other.getId() == target.getId()) continue;
134             if (target.isDependantOn(other)) {
135                 if (!visited.contains(other)) {
136                     classes.addAll(BundleScanner.loadClasses(
137                             other.getExportedAnnotatedClasses(pattern),
138                             initBundle, excludes));
139                     visited.add(other);
140                     processAnnotatedClassesInternal(other, bundlesToScan,
141                             pattern, visited, classes, initBundle, excludes);
142                 }
143             }
144         }
145     }
146
147     private boolean isDependantOn(BundleInfo other) {
148         for (String pkg : importPkgs) {
149             if (other.exportPkgs.contains(pkg)) return true;
150         }
151         return false;
152     }
153
154     public List<BundleInfo> getDependencies(Collection<BundleInfo> bundles) {
155         List<BundleInfo> result = new ArrayList<BundleInfo>();
156         for(BundleInfo bundle : bundles) {
157             if (isDependantOn(bundle)) result.add(bundle);
158         }
159         return result;
160     }
161
162
163     private static Set<String> parsePackages(String packageString) {
164         if (packageString == null) return Collections.emptySet();
165         String[] packages = packageString.split(",");
166         Set<String> result = new HashSet<String>();
167         for (int i=0; i<packages.length; i++) {
168             String[] nameAndAttrs = packages[i].split(";");
169             String packageName = nameAndAttrs[0].trim();
170             result.add(packageName);
171         }
172         return result;
173     }
174
175 }