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/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.batch;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.Hashtable;
import java.util.List;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.env.AccessRuleSet;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.parser.ScannerHelper;
import org.eclipse.jdt.internal.compiler.util.Util;
public class ClasspathDirectory extends ClasspathLocation {
private Hashtable directoryCache;
private String[] missingPackageHolder = new String[1];
private int mode; // ability to only consider one kind of files (source vs. binaries), by default use both
private String encoding; // only useful if referenced in the source path
ClasspathDirectory(File directory, String encoding, int mode,
AccessRuleSet accessRuleSet, String destinationPath) {
super(accessRuleSet, destinationPath);
this.mode = mode;
try {
this.path = directory.getCanonicalPath();
} catch (IOException e) {
// should not happen as we know that the file exists
this.path = directory.getAbsolutePath();
}
if (!this.path.endsWith(File.separator))
this.path += File.separator;
this.directoryCache = new Hashtable(11);
this.encoding = encoding;
}
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.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 && !ScannerHelper.isUpperCase(qualifiedPackageName.charAt(index))){/*empty*/}
if (index > last) {
if (last == -1) {
if (!doesFileExist(qualifiedPackageName, Util.EMPTY_STRING))
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 = CharOperation.NO_STRINGS;
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 List fetchLinkedJars(FileSystem.ClasspathSectionProblemReporter problemReporter) {
return null;
}
public NameEnvironmentAnswer findClass(char[] typeName, String qualifiedPackageName, String qualifiedBinaryFileName) {
return findClass(typeName, qualifiedPackageName, qualifiedBinaryFileName, false);
}
public NameEnvironmentAnswer findClass(char[] typeName, String qualifiedPackageName, String qualifiedBinaryFileName, boolean asBinaryOnly) {
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 && !asBinaryOnly) {
String fullSourcePath = this.path + qualifiedBinaryFileName.substring(0, qualifiedBinaryFileName.length() - 6) + SUFFIX_STRING_java;
if (!binaryExists)
return new NameEnvironmentAnswer(new CompilationUnit(null,
fullSourcePath, this.encoding, this.destinationPath),
fetchAccessRestriction(qualifiedBinaryFileName));
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, this.destinationPath),
fetchAccessRestriction(qualifiedBinaryFileName));
}
if (binaryExists) {
try {
ClassFileReader reader = ClassFileReader.read(this.path + qualifiedBinaryFileName);
if (reader != null)
return new NameEnvironmentAnswer(
reader,
fetchAccessRestriction(qualifiedBinaryFileName));
} catch (Exception e) {
// treat as if file is missing
}
}
return null;
}
public char[][][] findTypeNames(String qualifiedPackageName) {
if (!isPackage(qualifiedPackageName)) {
return null; // most common case
}
File dir = new File(this.path + qualifiedPackageName);
if (!dir.exists() || !dir.isDirectory()) {
return null;
}
String[] listFiles = dir.list(new FilenameFilter() {
public boolean accept(File directory, String name) {
String fileName = name.toLowerCase();
return fileName.endsWith(".class") || fileName.endsWith(".java"); //$NON-NLS-1$ //$NON-NLS-2$
}
});
int length;
if (listFiles == null || (length = listFiles.length) == 0) {
return null;
}
char[][][] result = new char[length][][];
char[][] packageName = CharOperation.splitOn(File.separatorChar, qualifiedPackageName.toCharArray());
for (int i = 0; i < length; i++) {
String fileName = listFiles[i];
int indexOfLastDot = fileName.indexOf('.');
result[i] = CharOperation.arrayConcat(packageName, fileName.substring(0, indexOfLastDot).toCharArray());
}
return result;
}
public void initialize() throws IOException {
// nothing to do
}
public boolean isPackage(String qualifiedPackageName) {
return directoryList(qualifiedPackageName) != null;
}
public void reset() {
this.directoryCache = new Hashtable(11);
}
public String toString() {
return "ClasspathDirectory " + this.path; //$NON-NLS-1$
}
public char[] normalizedPath() {
if (this.normalizedPath == null) {
this.normalizedPath = this.path.toCharArray();
if (File.separatorChar == '\\') {
CharOperation.replace(this.normalizedPath, '\\', '/');
}
}
return this.normalizedPath;
}
public String getPath() {
return this.path;
}
}
