gvsig-tools / org.gvsig.tools / library / trunk / org.gvsig.tools / org.gvsig.tools.lib / src / main / java / org / gvsig / tools / persistence / impl / FileTools.java @ 1249
History | View | Annotate | Download (5.07 KB)
1 |
package org.gvsig.tools.persistence.impl; |
---|---|
2 |
|
3 |
import java.io.File; |
4 |
import org.apache.commons.io.FilenameUtils; |
5 |
import org.slf4j.Logger; |
6 |
import org.slf4j.LoggerFactory; |
7 |
|
8 |
public class FileTools { |
9 |
private static Logger logger = LoggerFactory.getLogger(FileTools.class); |
10 |
|
11 |
static File relativizeFile(File rootFolder, File file) { |
12 |
if (rootFolder == null) { |
13 |
return file;
|
14 |
} |
15 |
if (file == null) { |
16 |
return null; |
17 |
} |
18 |
|
19 |
boolean isDir = false; |
20 |
// isDir = file.isDirectory();
|
21 |
isDir = rootFolder.isDirectory(); |
22 |
String basePath = rootFolder.getAbsolutePath();
|
23 |
if( basePath == null ) { |
24 |
logger.warn("Can't get absolute path, no relativize file '"+rootFolder.toString()+"'."); |
25 |
return file;
|
26 |
} |
27 |
|
28 |
String targetPath = FilenameUtils.normalize(file.getPath());
|
29 |
if( targetPath == null ) { |
30 |
logger.warn("Can't normalize path, no relativize file '"+file.getAbsolutePath()+"'."); |
31 |
return file;
|
32 |
} |
33 |
|
34 |
String pathSeparator = File.separator; |
35 |
// We need the -1 argument to split to make sure we get a trailing
|
36 |
// "" token if the base ends in the path separator and is therefore
|
37 |
// a directory. We require directory paths to end in the path
|
38 |
// separator -- otherwise they are indistinguishable from files.
|
39 |
String pathSeparatorQuoted = Pattern_quote(pathSeparator);
|
40 |
|
41 |
String[] base = basePath.split(pathSeparatorQuoted, -1); |
42 |
String[] target = targetPath.split(pathSeparatorQuoted, 0); |
43 |
|
44 |
// First get all the common elements. Store them as a string,
|
45 |
// and also count how many of them there are.
|
46 |
String common = ""; |
47 |
int commonIndex = 0; |
48 |
for (int i = 0; i < target.length && i < base.length; i++) { |
49 |
if (target[i].equals(base[i])) {
|
50 |
common += target[i] + pathSeparator; |
51 |
commonIndex++; |
52 |
} else
|
53 |
break;
|
54 |
} |
55 |
|
56 |
if (commonIndex == 0) { |
57 |
// Whoops -- not even a single common path element. This most
|
58 |
// likely indicates differing drive letters, like C: and D:.
|
59 |
// These paths cannot be relativized. Return the target path.
|
60 |
return file;
|
61 |
// This should never happen when all absolute paths
|
62 |
// begin with / as in *nix.
|
63 |
} |
64 |
|
65 |
String relative = ""; |
66 |
if (base.length == commonIndex) {
|
67 |
// Comment this out if you prefer that a relative path not start
|
68 |
// with ./
|
69 |
relative = "." + pathSeparator;
|
70 |
} else {
|
71 |
int numDirsUp = base.length - commonIndex - (isDir ? 0 : 1); |
72 |
// only subtract 1 if it is a file.
|
73 |
// The number of directories we have to backtrack is the length of
|
74 |
// the base path MINUS the number of common path elements, minus
|
75 |
// one because the last element in the path isn't a directory.
|
76 |
for (int i = 1; i <= (numDirsUp); i++) { |
77 |
relative += ".." + pathSeparator;
|
78 |
} |
79 |
} |
80 |
// if we are comparing directories then we
|
81 |
if (targetPath.length() > common.length()) {
|
82 |
// it's OK, it isn't a directory
|
83 |
relative += targetPath.substring(common.length()); |
84 |
} |
85 |
|
86 |
return new File(relative); |
87 |
} |
88 |
|
89 |
static File derelativizeFile(File rootFolder, File file ) { |
90 |
if(rootFolder == null || file == null){ |
91 |
return file;
|
92 |
} |
93 |
if (file.isAbsolute()) {
|
94 |
return file;
|
95 |
} |
96 |
File f = new File(rootFolder, file.getPath()).getAbsoluteFile(); |
97 |
String targetPath = FilenameUtils.normalize(f.getPath());
|
98 |
return new File(targetPath); |
99 |
} |
100 |
|
101 |
static boolean isInDifferentDrive(File rootFolder, File file) { |
102 |
|
103 |
if (rootFolder == null) { |
104 |
return false; |
105 |
} |
106 |
|
107 |
if (file == null) { |
108 |
return false; |
109 |
} |
110 |
String basePath = rootFolder.getAbsolutePath();
|
111 |
String targetPath = file.getPath();
|
112 |
String pathSeparator = File.separator; |
113 |
// We need the -1 argument to split to make sure we get a trailing
|
114 |
// "" token if the base ends in the path separator and is therefore
|
115 |
// a directory. We require directory paths to end in the path
|
116 |
// separator -- otherwise they are indistinguishable from files.
|
117 |
String[] base = basePath.split(Pattern_quote(pathSeparator), -1); |
118 |
String[] target = targetPath.split(Pattern_quote(pathSeparator), 0); |
119 |
/*
|
120 |
* If first component is different then they are different
|
121 |
* drives. In Unix-type file systems, the first for both
|
122 |
* should be "" so this will not happen
|
123 |
*/
|
124 |
return !target[0].equals(base[0]); |
125 |
} |
126 |
|
127 |
|
128 |
private static String Pattern_quote(String str) { |
129 |
int eInd = str.indexOf("\\E"); |
130 |
if (eInd < 0) { |
131 |
// No need to handle backslashes.
|
132 |
return "\\Q" + str + "\\E"; |
133 |
} |
134 |
|
135 |
StringBuffer sb = new StringBuffer(str.length() + 16); |
136 |
sb.append("\\Q"); // start quote |
137 |
|
138 |
int pos = 0; |
139 |
do {
|
140 |
// A backslash is quoted by another backslash;
|
141 |
// 'E' is not needed to be quoted.
|
142 |
sb.append(str.substring(pos, eInd)) |
143 |
.append("\\E" + "\\\\" + "E" + "\\Q"); |
144 |
pos = eInd + 2;
|
145 |
} while ((eInd = str.indexOf("\\E", pos)) >= 0); |
146 |
|
147 |
sb.append(str.substring(pos, str.length())) |
148 |
.append("\\E"); // end quote |
149 |
return sb.toString();
|
150 |
} |
151 |
|
152 |
} |