1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.batch;
import java.io.File;
import java.util.Hashtable;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.util.SuffixConstants;
public class ClasspathDirectory implements FileSystem.Classpath, SuffixConstants {
String path;
Hashtable directoryCache;
String[] missingPackageHolder = new String[1];
String encoding;
public int mode; // ability to only consider one kind of files (source vs. binaries), by default use both
public static final int SOURCE = 1;
public static final int BINARY = 2;
ClasspathDirectory(File directory, String encoding, int mode) {
this.mode = mode;
this.path = directory.getAbsolutePath();
if (!this.path.endsWith(File.separator))
this.path += File.separator;
this.directoryCache = new Hashtable(11);
this.encoding = encoding;
}
ClasspathDirectory(File directory, String encoding) {
this(directory, encoding, SOURCE | BINARY); // by default consider both sources and binaries
}
String[] directoryList(String qualifiedPackageName) {
String[] dirList = (String[]) this.directoryCache.get(qualifiedPackageName);
if (dirList == this.missingPackageHolder) return null; // package exists in another classpath directory or jar
if (dirList != null) return dirList;
File dir = new File(this.path + qualifiedPackageName);
notFound : if (dir != null && dir.isDirectory()) {
// must protect against a case insensitive File call
// walk the qualifiedPackageName backwards looking for an uppercase character before the '/'
int index = qualifiedPackageName.length();
int last = qualifiedPackageName.lastIndexOf(File.separatorChar);
while (--index > last && !Character.isUpperCase(qualifiedPackageName.charAt(index))){/*empty*/}
if (index > last) {
if (last == -1) {
if (!doesFileExist(qualifiedPackageName, "")) //$NON-NLS-1$
break notFound;
} else {
String packageName = qualifiedPackageName.substring(last + 1);
String parentPackage = qualifiedPackageName.substring(0, last);
if (!doesFileExist(packageName, parentPackage))
break notFound;
}
}
if ((dirList = dir.list()) == null)
dirList = new String[0];
this.directoryCache.put(qualifiedPackageName, dirList);
return dirList;
}
this.directoryCache.put(qualifiedPackageName, this.missingPackageHolder);
return null;
}
boolean doesFileExist(String fileName, String qualifiedPackageName) {
String[] dirList = directoryList(qualifiedPackageName);
if (dirList == null) return false; // most common case
for (int i = dirList.length; --i >= 0;)
if (fileName.equals(dirList[i]))
return true;
return false;
}
public NameEnvironmentAnswer findClass(char[] typeName, String qualifiedPackageName, String qualifiedBinaryFileName) {
if (!isPackage(qualifiedPackageName)) return null; // most common case
String fileName = new String(typeName);
boolean binaryExists = ((this.mode & BINARY) != 0) && doesFileExist(fileName + SUFFIX_STRING_class, qualifiedPackageName);
boolean sourceExists = ((this.mode & SOURCE) != 0) && doesFileExist(fileName + SUFFIX_STRING_java, qualifiedPackageName);
if (sourceExists) {
String fullSourcePath = this.path + qualifiedBinaryFileName.substring(0, qualifiedBinaryFileName.length() - 6) + SUFFIX_STRING_java;
if (!binaryExists)
return new NameEnvironmentAnswer(new CompilationUnit(null, fullSourcePath, this.encoding), null/* TODO no access restriction*/);
String fullBinaryPath = this.path + qualifiedBinaryFileName;
long binaryModified = new File(fullBinaryPath).lastModified();
long sourceModified = new File(fullSourcePath).lastModified();
if (sourceModified > binaryModified)
return new NameEnvironmentAnswer(new CompilationUnit(null, fullSourcePath, this.encoding), null/* TODO no access restriction*/);
}
if (binaryExists) {
try {
ClassFileReader reader = ClassFileReader.read(this.path + qualifiedBinaryFileName);
if (reader != null) return new NameEnvironmentAnswer(reader, null/* TODO no access restriction*/);
} catch (Exception e) {
// treat as if file is missing
}
}
return null;
}
public boolean isPackage(String qualifiedPackageName) {
return directoryList(qualifiedPackageName) != null;
}
public void reset() {
this.directoryCache = new Hashtable(11);
}
public String toString() {
return "ClasspathDirectory " + this.path; //$NON-NLS-1$
}
}
|
