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17 package org.apache.servicemix.jbi.util;
18
19 import java.io.File  ;
20 import java.io.IOException ;
21 import org.apache.commons.logging.Log;
22 import org.apache.commons.logging.LogFactory;
23
28 public class FileVersionUtil{
29 private static final Log log=LogFactory.getLog(FileVersionUtil.class);
30 private static final String VERSION_PREFIX="version_";
31 private static final String [] RESERVED= { VERSION_PREFIX };
32
33
39 public static int getLatestVersionNumber(File rootDirectory) {
40 int result=-1;
41 if(isVersioned(rootDirectory)){
42 File [] files=rootDirectory.listFiles();
43 for(int i=0;i<files.length;i++){
44 int version=getVersionNumber(files[i].getName());
45 if(version>result){
46 result=version;
47 }
48 }
49 }
50 return result;
51 }
52
53
60 public static File getLatestVersionDirectory(File rootDirectory) {
61 File result=null;
62 int highestVersion=-1;
63 if(rootDirectory != null && isVersioned(rootDirectory)){
64 File [] files=rootDirectory.listFiles();
65 for(int i=0;i<files.length;i++){
66 int version=getVersionNumber(files[i].getName());
67 if(version>highestVersion){
68 highestVersion=version;
69 result=files[i];
70 }
71 }
72 }
73 return result;
74 }
75
76
82 public static File createNewVersionDirectory(File rootDirectory) throws IOException {
83 File result= getNewVersionDirectory(rootDirectory);
84 if(!FileUtil.buildDirectory(result)){
85 throw new IOException ("Failed to build version directory: "+result);
86 }
87 return result;
88 }
89
90
97 public static File getNewVersionDirectory(File rootDirectory) throws IOException {
98 File result=null;
99 if(FileUtil.buildDirectory(rootDirectory)){
100 String versionDirectoryName=VERSION_PREFIX;
101 if(isVersioned(rootDirectory)){
102 int versionNumber=getLatestVersionNumber(rootDirectory);
103 versionNumber=versionNumber>0?versionNumber+1:1;
104 versionDirectoryName+=versionNumber;
105 }else{
106 versionDirectoryName+=1;
107 }
108 result=FileUtil.getDirectoryPath(rootDirectory,versionDirectoryName);
109 }else{
110 throw new IOException ("Cannot build parent directory: "+rootDirectory);
111 }
112 return result;
113 }
114
115
121 public static void initializeVersionDirectory(File rootDirectory) throws IOException {
122 if(!isVersioned(rootDirectory)){
123 File newRoot=createNewVersionDirectory(rootDirectory);
124 File [] files=rootDirectory.listFiles();
125 for(int i=0;i<files.length;i++){
126 if(!isReserved(files[i].getName())){
127 log.info(rootDirectory.getPath()+": moving non-versioned file "+files[i].getName()+" to "
128 +newRoot.getName());
129 File moveTo = FileUtil.getDirectoryPath(newRoot, files[i].getName());
130 FileUtil.moveFile(files[i],moveTo);
131 }
132 }
133 }
134 }
135
136 private static boolean isVersioned(File rootDirectory) {
137 boolean result=false;
138 if(rootDirectory.exists()&&rootDirectory.isDirectory()){
139 File [] files=rootDirectory.listFiles();
140 result=files==null||files.length==0;
141 if(!result){
142 for(int i=0;i<files.length;i++){
143 if(isReserved(files[i].getName())){
144 result=true;
145 break;
146 }
147 }
148 }
149 }
150 return result;
151 }
152
153 private static boolean isReserved(String name){
154 boolean result=false;
155 if(name!=null){
156 for(int i=0;i<RESERVED.length;i++){
157 if(name.startsWith(RESERVED[i])){
158 result=true;
159 break;
160 }
161 }
162 }
163 return result;
164 }
165
166 private static int getVersionNumber(String name){
167 int result=-1;
168 if(name!=null&&name.startsWith(VERSION_PREFIX)){
169 String number=name.substring(VERSION_PREFIX.length());
170 result=Integer.parseInt(number);
171 }
172 return result;
173 }
174 } |
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