/*******************************************************************************
* Copyright (c) 2000, 2010 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.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.env.AccessRuleSet;
import org.eclipse.jdt.internal.compiler.env.INameEnvironment;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.util.SuffixConstants;
import org.eclipse.jdt.internal.compiler.util.Util;
public class FileSystem implements INameEnvironment, SuffixConstants {
public interface Classpath {
char[][][] findTypeNames(String qualifiedPackageName);
NameEnvironmentAnswer findClass(char[] typeName, String qualifiedPackageName, String qualifiedBinaryFileName);
NameEnvironmentAnswer findClass(char[] typeName, String qualifiedPackageName, String qualifiedBinaryFileName, boolean asBinaryOnly);
boolean isPackage(String qualifiedPackageName);
/**
* Return a list of the jar file names defined in the Class-Path section
* of the jar file manifest if any, null else. Only ClasspathJar (and
* extending classes) instances may return a non-null result.
* @param problemReporter problem reporter with which potential
* misconfiguration issues are raised
* @return a list of the jar file names defined in the Class-Path
* section of the jar file manifest if any
*/
List fetchLinkedJars(ClasspathSectionProblemReporter problemReporter);
/**
* This method resets the environment. The resulting state is equivalent to
* a new name environment without creating a new object.
*/
void reset();
/**
* Return a normalized path for file based classpath entries. This is an
* absolute path in which file separators are transformed to the
* platform-agnostic '/', ending with a '/' for directories. This is an
* absolute path in which file separators are transformed to the
* platform-agnostic '/', deprived from the '.jar' (resp. '.zip')
* extension for jar (resp. zip) files.
* @return a normalized path for file based classpath entries
*/
char[] normalizedPath();
/**
* Return the path for file based classpath entries. This is an absolute path
* ending with a file separator for directories, an absolute path including the '.jar'
* (resp. '.zip') extension for jar (resp. zip) files.
* @return the path for file based classpath entries
*/
String getPath();
/**
* Initialize the entry
*/
void initialize() throws IOException;
}
public interface ClasspathSectionProblemReporter {
void invalidClasspathSection(String jarFilePath);
void multipleClasspathSections(String jarFilePath);
}
/**
* This class is defined how to normalize the classpath entries.
* It removes duplicate entries.
*/
public static class ClasspathNormalizer {
/**
* Returns the normalized classpath entries (no duplicate).
* <p>The given classpath entries are FileSystem.Classpath. We check the getPath() in order to find
* duplicate entries.</p>
*
* @param classpaths the given classpath entries
* @return the normalized classpath entries
*/
public static ArrayList normalize(ArrayList classpaths) {
ArrayList normalizedClasspath = new ArrayList();
HashSet cache = new HashSet();
for (Iterator iterator = classpaths.iterator(); iterator.hasNext(); ) {
FileSystem.Classpath classpath = (FileSystem.Classpath) iterator.next();
if (!cache.contains(classpath)) {
normalizedClasspath.add(classpath);
cache.add(classpath);
}
}
return normalizedClasspath;
}
}
Classpath[] classpaths;
Set knownFileNames;
/*
classPathNames is a collection is Strings representing the full path of each class path
initialFileNames is a collection is Strings, the trailing '.java' will be removed if its not already.
*/
public FileSystem(String[] classpathNames, String[] initialFileNames, String encoding) {
final int classpathSize = classpathNames.length;
this.classpaths = new Classpath[classpathSize];
int counter = 0;
for (int i = 0; i < classpathSize; i++) {
Classpath classpath = getClasspath(classpathNames[i], encoding, null);
try {
classpath.initialize();
this.classpaths[counter++] = classpath;
} catch (IOException e) {
// ignore
}
}
if (counter != classpathSize) {
System.arraycopy(this.classpaths, 0, (this.classpaths = new Classpath[counter]), 0, counter);
}
initializeKnownFileNames(initialFileNames);
}
protected FileSystem(Classpath[] paths, String[] initialFileNames) {
final int length = paths.length;
int counter = 0;
this.classpaths = new FileSystem.Classpath[length];
for (int i = 0; i < length; i++) {
final Classpath classpath = paths[i];
try {
classpath.initialize();
this.classpaths[counter++] = classpath;
} catch(IOException exception) {
// ignore
}
}
if (counter != length) {
// should not happen
System.arraycopy(this.classpaths, 0, (this.classpaths = new FileSystem.Classpath[counter]), 0, counter);
}
initializeKnownFileNames(initialFileNames);
}
public static Classpath getClasspath(String classpathName, String encoding, AccessRuleSet accessRuleSet) {
return getClasspath(classpathName, encoding, false, accessRuleSet, null);
}
public static Classpath getClasspath(String classpathName, String encoding,
boolean isSourceOnly, AccessRuleSet accessRuleSet,
String destinationPath) {
Classpath result = null;
File file = new File(convertPathSeparators(classpathName));
if (file.isDirectory()) {
if (file.exists()) {
result = new ClasspathDirectory(file, encoding,
isSourceOnly ? ClasspathLocation.SOURCE :
ClasspathLocation.SOURCE | ClasspathLocation.BINARY,
accessRuleSet,
destinationPath == null || destinationPath == Main.NONE ?
destinationPath : // keep == comparison valid
convertPathSeparators(destinationPath));
}
} else {
if (Util.isPotentialZipArchive(classpathName)) {
if (isSourceOnly) {
// source only mode
result = new ClasspathSourceJar(file, true, accessRuleSet,
encoding,
destinationPath == null || destinationPath == Main.NONE ?
destinationPath : // keep == comparison valid
convertPathSeparators(destinationPath));
} else if (destinationPath == null) {
// class file only mode
result = new ClasspathJar(file, true, accessRuleSet, null);
}
}
}
return result;
}
private void initializeKnownFileNames(String[] initialFileNames) {
if (initialFileNames == null) {
this.knownFileNames = new HashSet(0);
return;
}
this.knownFileNames = new HashSet(initialFileNames.length * 2);
for (int i = initialFileNames.length; --i >= 0;) {
File compilationUnitFile = new File(initialFileNames[i]);
char[] fileName = null;
try {
fileName = compilationUnitFile.getCanonicalPath().toCharArray();
} catch (IOException e) {
// this should not happen as the file exists
continue;
}
char[] matchingPathName = null;
final int lastIndexOf = CharOperation.lastIndexOf('.', fileName);
if (lastIndexOf != -1) {
fileName = CharOperation.subarray(fileName, 0, lastIndexOf);
}
CharOperation.replace(fileName, '\\', '/');
boolean globalPathMatches = false;
// the most nested path should be the selected one
for (int j = 0, max = this.classpaths.length; j < max; j++) {
char[] matchCandidate = this.classpaths[j].normalizedPath();
boolean currentPathMatch = false;
if (this.classpaths[j] instanceof ClasspathDirectory
&& CharOperation.prefixEquals(matchCandidate, fileName)) {
currentPathMatch = true;
if (matchingPathName == null) {
matchingPathName = matchCandidate;
} else {
if (currentPathMatch) {
// we have a second source folder that matches the path of the source file
if (matchCandidate.length > matchingPathName.length) {
// we want to preserve the shortest possible path
matchingPathName = matchCandidate;
}
} else {
// we want to preserve the shortest possible path
if (!globalPathMatches && matchCandidate.length < matchingPathName.length) {
matchingPathName = matchCandidate;
}
}
}
if (currentPathMatch) {
globalPathMatches = true;
}
}
}
if (matchingPathName == null) {
this.knownFileNames.add(new String(fileName)); // leave as is...
} else {
this.knownFileNames.add(new String(CharOperation.subarray(fileName, matchingPathName.length, fileName.length)));
}
matchingPathName = null;
}
}
public void cleanup() {
for (int i = 0, max = this.classpaths.length; i < max; i++)
this.classpaths[i].reset();
}
private static String convertPathSeparators(String path) {
return File.separatorChar == '/'
? path.replace('\\', '/')
: path.replace('/', '\\');
}
private NameEnvironmentAnswer findClass(String qualifiedTypeName, char[] typeName, boolean asBinaryOnly){
if (this.knownFileNames.contains(qualifiedTypeName)) return null; // looking for a file which we know was provided at the beginning of the compilation
String qualifiedBinaryFileName = qualifiedTypeName + SUFFIX_STRING_class;
String qualifiedPackageName =
qualifiedTypeName.length() == typeName.length
? Util.EMPTY_STRING
: qualifiedBinaryFileName.substring(0, qualifiedTypeName.length() - typeName.length - 1);
String qp2 = File.separatorChar == '/' ? qualifiedPackageName : qualifiedPackageName.replace('/', File.separatorChar);
NameEnvironmentAnswer suggestedAnswer = null;
if (qualifiedPackageName == qp2) {
for (int i = 0, length = this.classpaths.length; i < length; i++) {
NameEnvironmentAnswer answer = this.classpaths[i].findClass(typeName, qualifiedPackageName, qualifiedBinaryFileName, asBinaryOnly);
if (answer != null) {
if (!answer.ignoreIfBetter()) {
if (answer.isBetter(suggestedAnswer))
return answer;
} else if (answer.isBetter(suggestedAnswer))
// remember suggestion and keep looking
suggestedAnswer = answer;
}
}
} else {
String qb2 = qualifiedBinaryFileName.replace('/', File.separatorChar);
for (int i = 0, length = this.classpaths.length; i < length; i++) {
Classpath p = this.classpaths[i];
NameEnvironmentAnswer answer = (p instanceof ClasspathJar)
? p.findClass(typeName, qualifiedPackageName, qualifiedBinaryFileName, asBinaryOnly)
: p.findClass(typeName, qp2, qb2, asBinaryOnly);
if (answer != null) {
if (!answer.ignoreIfBetter()) {
if (answer.isBetter(suggestedAnswer))
return answer;
} else if (answer.isBetter(suggestedAnswer))
// remember suggestion and keep looking
suggestedAnswer = answer;
}
}
}
if (suggestedAnswer != null)
// no better answer was found
return suggestedAnswer;
return null;
}
public NameEnvironmentAnswer findType(char[][] compoundName) {
if (compoundName != null)
return findClass(
new String(CharOperation.concatWith(compoundName, '/')),
compoundName[compoundName.length - 1],
false);
return null;
}
public char[][][] findTypeNames(char[][] packageName) {
char[][][] result = null;
if (packageName != null) {
String qualifiedPackageName = new String(CharOperation.concatWith(packageName, '/'));
String qualifiedPackageName2 = File.separatorChar == '/' ? qualifiedPackageName : qualifiedPackageName.replace('/', File.separatorChar);
if (qualifiedPackageName == qualifiedPackageName2) {
for (int i = 0, length = this.classpaths.length; i < length; i++) {
char[][][] answers = this.classpaths[i].findTypeNames(qualifiedPackageName);
if (answers != null) {
// concat with previous answers
if (result == null) {
result = answers;
} else {
int resultLength = result.length;
int answersLength = answers.length;
System.arraycopy(result, 0, (result = new char[answersLength + resultLength][][]), 0, resultLength);
System.arraycopy(answers, 0, result, resultLength, answersLength);
}
}
}
} else {
for (int i = 0, length = this.classpaths.length; i < length; i++) {
Classpath p = this.classpaths[i];
char[][][] answers = (p instanceof ClasspathJar)
? p.findTypeNames(qualifiedPackageName)
: p.findTypeNames(qualifiedPackageName2);
if (answers != null) {
// concat with previous answers
if (result == null) {
result = answers;
} else {
int resultLength = result.length;
int answersLength = answers.length;
System.arraycopy(result, 0, (result = new char[answersLength + resultLength][][]), 0, resultLength);
System.arraycopy(answers, 0, result, resultLength, answersLength);
}
}
}
}
}
return result;
}
public NameEnvironmentAnswer findType(char[][] compoundName, boolean asBinaryOnly) {
if (compoundName != null)
return findClass(
new String(CharOperation.concatWith(compoundName, '/')),
compoundName[compoundName.length - 1],
asBinaryOnly);
return null;
}
public NameEnvironmentAnswer findType(char[] typeName, char[][] packageName) {
if (typeName != null)
return findClass(
new String(CharOperation.concatWith(packageName, typeName, '/')),
typeName,
false);
return null;
}
public boolean isPackage(char[][] compoundName, char[] packageName) {
String qualifiedPackageName = new String(CharOperation.concatWith(compoundName, packageName, '/'));
String qp2 = File.separatorChar == '/' ? qualifiedPackageName : qualifiedPackageName.replace('/', File.separatorChar);
if (qualifiedPackageName == qp2) {
for (int i = 0, length = this.classpaths.length; i < length; i++)
if (this.classpaths[i].isPackage(qualifiedPackageName))
return true;
} else {
for (int i = 0, length = this.classpaths.length; i < length; i++) {
Classpath p = this.classpaths[i];
if ((p instanceof ClasspathJar) ? p.isPackage(qualifiedPackageName) : p.isPackage(qp2))
return true;
}
}
return false;
}
}