com.github.stephenc.javaisotools.iso9660.impl.ISO9660Factory Maven / Gradle / Ivy
/*
* Copyright (c) 2010. Stephen Connolly.
* Copyright (C) 2007. Jens Hatlak
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.github.stephenc.javaisotools.iso9660.impl;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Vector;
import com.github.stephenc.javaisotools.iso9660.ISO9660Directory;
import com.github.stephenc.javaisotools.iso9660.ISO9660File;
import com.github.stephenc.javaisotools.iso9660.ISO9660RootDirectory;
import com.github.stephenc.javaisotools.iso9660.LayoutHelper;
import com.github.stephenc.javaisotools.iso9660.NamingConventions;
import com.github.stephenc.javaisotools.iso9660.StandardConfig;
import com.github.stephenc.javaisotools.iso9660.sabre.impl.BothWordDataReference;
import com.github.stephenc.javaisotools.sabre.DataReference;
import com.github.stephenc.javaisotools.sabre.Fixup;
import com.github.stephenc.javaisotools.sabre.HandlerException;
import com.github.stephenc.javaisotools.sabre.StreamHandler;
import com.github.stephenc.javaisotools.sabre.impl.WordDataReference;
import com.github.stephenc.javaisotools.iso9660.sabre.impl.EmptyByteArrayDataReference;
import com.github.stephenc.javaisotools.iso9660.sabre.impl.LSBFWordDataReference;
import com.github.stephenc.javaisotools.sabre.impl.ByteDataReference;
public class ISO9660Factory {
StreamHandler streamHandler;
StandardConfig config;
LayoutHelper helper;
ISO9660RootDirectory root;
HashMap volumeFixups, typeLPTFixups, typeMPTFixups, dirFixups, fileFixups, locationFixups;
Vector emptyFileFixups;
public ISO9660Factory(StreamHandler streamHandler, StandardConfig config, LayoutHelper helper,
ISO9660RootDirectory root, HashMap volumeFixups) {
this.streamHandler = streamHandler;
this.config = config;
this.helper = helper;
this.root = root;
this.volumeFixups = volumeFixups;
int dirCount = root.deepDirCount() + 1;
this.typeLPTFixups = new HashMap(dirCount);
this.typeMPTFixups = new HashMap(dirCount);
this.dirFixups = new HashMap(dirCount);
int fileCount = root.deepFileCount() + 1;
this.fileFixups = new HashMap(fileCount);
this.locationFixups = new HashMap(fileCount);
this.emptyFileFixups = new Vector();
}
public void applyNamingConventions() throws HandlerException {
NamingConventions namingConventions = helper.getNamingConventions();
namingConventions.processDirectory(root);
Iterator dit = root.unsortedIterator();
while (dit.hasNext()) {
ISO9660Directory dir = (ISO9660Directory) dit.next();
namingConventions.processDirectory(dir);
}
}
public void relocateDirectories() {
if (root.deepLevelCount() >= 8) {
root.setMovedDirectoryStore();
relocateDirectories(root);
}
}
private void relocateDirectories(ISO9660Directory dir) {
Iterator it = dir.sortedIterator();
while (it.hasNext()) {
ISO9660Directory subdir = (ISO9660Directory) it.next();
if (subdir.getLevel() == 9) {
relocate(subdir);
}
}
}
ISO9660Directory relocate(ISO9660Directory dir) {
return dir.relocate();
}
public void doPT(Object type) throws HandlerException {
streamHandler.startElement(new LogicalSectorElement("PT"));
// Write and close Path Table Location Fixup
HashMap ptFixups;
long position = streamHandler.mark();
int location = helper.getCurrentLocation();
if (type == ISO9660Constants.TYPE_L_PT) {
ptFixups = typeLPTFixups;
Fixup ptLocationFixup = (Fixup) volumeFixups.get("typeLPTLocationFixup");
ptLocationFixup.data(new LSBFWordDataReference(location));
ptLocationFixup.close();
volumeFixups.remove("typeLPTLocationFixup");
} else if (type == ISO9660Constants.TYPE_M_PT) {
ptFixups = typeMPTFixups;
Fixup ptLocationFixup = (Fixup) volumeFixups.get("typeMPTLocationFixup");
ptLocationFixup.data(new WordDataReference(location));
ptLocationFixup.close();
volumeFixups.remove("typeMPTLocationFixup");
} else {
throw new HandlerException("Unknown Path Table Type: " + type);
}
HashMap parentMapper = new HashMap();
ISO9660Directory dir = root;
int dirNumber = 1;
// Root Directory
ISO9660PathTableRecord rptr = new ISO9660PathTableRecord(streamHandler, type, ISO9660Constants.FI_ROOT, 1);
ptFixups.put(root, rptr.doPTR());
parentMapper.put(dir, new Integer(dirNumber));
// Subdirectories
Iterator it = root.sortedIterator();
while (it.hasNext()) {
dirNumber++;
dir = (ISO9660Directory) it.next();
// Retrieve parent directory number and reset filename clash detection if appropriate
int parent = ((Integer) parentMapper.get(dir.getParentDirectory())).intValue();
DataReference ref = helper.getFilenameDataReference(dir);
ISO9660PathTableRecord ptr = new ISO9660PathTableRecord(streamHandler, type, ref, parent);
ptFixups.put(dir, ptr.doPTR());
parentMapper.put(dir, new Integer(dirNumber));
}
if (volumeFixups.containsKey("ptSizeFixup")) {
int ptSize = helper.getDifferenceTo(position);
Fixup ptSizeFixup = (Fixup) volumeFixups.get("ptSizeFixup");
ptSizeFixup.data(new BothWordDataReference(ptSize));
ptSizeFixup.close();
volumeFixups.remove("ptSizeFixup");
}
streamHandler.endElement();
}
public void doDRA() throws HandlerException {
HashMap parentMapper = new HashMap();
// Root Directory
doDir(root, parentMapper);
doRootDirFixups(parentMapper);
// Subdirectories
ISO9660Directory dir = root;
Iterator it = root.sortedIterator();
while (it.hasNext()) {
dir = (ISO9660Directory) it.next();
doDir(dir, parentMapper);
}
}
private void doRootDirFixups(HashMap parentMapper) throws HandlerException {
ParentInfo parentInfo = (ParentInfo) parentMapper.get(root);
// Write and close Root Directory Location Fixup
Fixup rootDirLocationFixup = (Fixup) volumeFixups.get("rootDirLocationFixup");
rootDirLocationFixup.data(new BothWordDataReference(parentInfo.location));
rootDirLocationFixup.close();
volumeFixups.remove("rootDirLocationFixup");
// Write and close Root Directory Length Fixup
Fixup rootDirLengthFixup = (Fixup) volumeFixups.get("rootDirLengthFixup");
rootDirLengthFixup.data(new BothWordDataReference(parentInfo.length));
rootDirLengthFixup.close();
volumeFixups.remove("rootDirLengthFixup");
}
void doDir(ISO9660Directory dir, HashMap parentMapper) throws HandlerException {
streamHandler.startElement(new LogicalSectorElement("DIR"));
long position = streamHandler.mark();
int location = helper.getCurrentLocation();
// "dot": Current Directory
HashMap dotMemory = doDRLengthFixup(doDotDR(dir));
Fixup dotLocationFixup = (Fixup) dotMemory.get("drLocationFixup");
Fixup dotLengthFixup = (Fixup) dotMemory.get("drDataLengthFixup");
// "dotdot": Parent Directory
HashMap dotdotMemory = doDRLengthFixup(doDotDotDR(dir));
Fixup dotdotLocationFixup = (Fixup) dotdotMemory.get("drLocationFixup");
Fixup dotdotLengthFixup = (Fixup) dotdotMemory.get("drDataLengthFixup");
// Prepare files and directories to be processed in sorted order
Vector contents = new Vector();
contents.addAll(dir.getDirectories());
contents.addAll(dir.getFiles());
Collections.sort(contents);
Iterator it = contents.iterator();
while (it.hasNext()) {
doBlockCheck(position);
Object object = it.next();
if (object instanceof ISO9660Directory) {
ISO9660Directory subdir = (ISO9660Directory) object;
if (subdir.isMoved() && dir != root.getMovedDirectoriesStore()) {
doDRLengthFixup(doFakeDR(subdir));
} else {
doDRLengthFixup(doDR(subdir));
}
} else if (object instanceof ISO9660File) {
ISO9660File file = (ISO9660File) object;
doDRLengthFixup(doDR(file));
} else {
throw new HandlerException("Neither file nor directory: " + object);
}
}
streamHandler.endElement();
// Compute sector-padded length for Directory Data Length Fixups
int length = helper.getCurrentLocation() - location;
length *= ISO9660Constants.LOGICAL_BLOCK_SIZE;
// Save Location and Length to parentMapper
ParentInfo dotInfo = new ParentInfo();
dotInfo.location = location;
dotInfo.length = length;
parentMapper.put(dir, dotInfo);
// Write and close "dot" Fixups
dotLocationFixup.data(new BothWordDataReference(location));
dotLocationFixup.close();
dotLengthFixup.data(new BothWordDataReference(length));
dotLengthFixup.close();
// Retrieve Parent Location and Length from parentMapper
ParentInfo dotdotInfo = (ParentInfo) parentMapper.get(dir.getParentDirectory());
// Write and close "dotdot" Fixups
dotdotLocationFixup.data(new BothWordDataReference(dotdotInfo.location));
dotdotLocationFixup.close();
dotdotLengthFixup.data(new BothWordDataReference(dotdotInfo.length));
dotdotLengthFixup.close();
// Write and close Fixups of linking Directory Records
DirFixupPair fixups = (DirFixupPair) dirFixups.get(dir);
if (fixups != null) {
// Write and close Location Fixup
fixups.location.data(new BothWordDataReference(location));
fixups.location.close();
// Write and close Length Fixup
fixups.length.data(new BothWordDataReference(length));
fixups.length.close();
}
// Write and close Type L Path Table Fixup
Fixup typeLPTDirLocation = (Fixup) typeLPTFixups.get(dir);
typeLPTDirLocation.data(new LSBFWordDataReference(location));
typeLPTDirLocation.close();
// Write and close Type M Path Table Fixup
Fixup typeMPTDirLocation = (Fixup) typeMPTFixups.get(dir);
typeMPTDirLocation.data(new WordDataReference(location));
typeMPTDirLocation.close();
}
private HashMap doDRLengthFixup(HashMap memory) throws HandlerException {
int drLength = ((Integer) memory.get("drLength")).intValue();
memory.remove("drLength");
if (drLength % 2 == 1) {
// DR length must be an even number, see ISO 9660 section 9.1.13
streamHandler.data(new ByteDataReference(0));
drLength++;
}
if (drLength > 0xFF) {
throw new HandlerException("Invalid Directory Record Length: " + drLength);
}
// Write and close Directory Record Length Fixup
Fixup drLengthFixup = (Fixup) memory.get("drLengthFixup");
drLengthFixup.data(new ByteDataReference(drLength));
drLengthFixup.close();
memory.remove("drLengthFixup");
return memory;
}
HashMap doFakeDR(ISO9660Directory dir) throws HandlerException {
ISO9660File file = new ISO9660File(dir.getName());
file.setIsMovedDirectory();
ISO9660DirectoryRecord dr = new ISO9660DirectoryRecord(streamHandler, file, helper);
HashMap memory = dr.doDR();
// Remember Location Fixup
Fixup locationFixup = (Fixup) memory.get("drLocationFixup");
emptyFileFixups.add(locationFixup);
// Write and close Length Fixup
Fixup dataLengthFixup = (Fixup) memory.get("drDataLengthFixup");
dataLengthFixup.data(new BothWordDataReference(0));
dataLengthFixup.close();
return memory;
}
HashMap doDR(ISO9660File file) throws HandlerException {
ISO9660DirectoryRecord dr = new ISO9660DirectoryRecord(streamHandler, file, helper);
HashMap memory = dr.doDR();
// Remember Location Fixup
Fixup locationFixup = (Fixup) memory.get("drLocationFixup");
if (fileFixups.containsKey(file.getID())) {
throw new RuntimeException("Duplicate file encountered: " + file.getISOPath());
}
fileFixups.put(file.getID(), locationFixup);
// Write and close Length Fixup
Fixup dataLengthFixup = (Fixup) memory.get("drDataLengthFixup");
dataLengthFixup.data(new BothWordDataReference(file.length()));
dataLengthFixup.close();
return memory;
}
HashMap doDR(ISO9660Directory dir) throws HandlerException {
ISO9660DirectoryRecord dr = new ISO9660DirectoryRecord(streamHandler, dir, helper);
HashMap memory = dr.doDR();
// Remember Location and Length Fixups
DirFixupPair dirFixupPair = new DirFixupPair();
dirFixupPair.location = (Fixup) memory.get("drLocationFixup");
dirFixupPair.length = (Fixup) memory.get("drDataLengthFixup");
dirFixups.put(dir, dirFixupPair);
return memory;
}
HashMap doDotDR(ISO9660Directory dir) throws HandlerException {
Object dot;
if (dir == root) {
dot = ISO9660Constants.FI_ROOT;
} else {
dot = ISO9660Constants.FI_DOT;
}
ISO9660DirectoryRecord dr = new ISO9660DirectoryRecord(streamHandler, dot, dir, helper);
return dr.doDR();
}
HashMap doDotDotDR(ISO9660Directory dir) throws HandlerException {
ISO9660Directory parentDir = dir.getParentDirectory();
Object dotdot = ISO9660Constants.FI_DOTDOT;
ISO9660DirectoryRecord dr = new ISO9660DirectoryRecord(streamHandler, dotdot, parentDir, helper);
return dr.doDR();
}
private void doBlockCheck(long position) throws HandlerException {
int length = (int) ((streamHandler.mark() - position) % ISO9660Constants.LOGICAL_BLOCK_SIZE);
int rest = ISO9660Constants.LOGICAL_BLOCK_SIZE - length;
if (rest < 0xFF) {
// Maybe not enough space to store another DR in this block
// -> pad to end of block (see ISO9660:7.8.1.1)
streamHandler.data(new EmptyByteArrayDataReference(rest));
}
}
public void doFileFixup(ISO9660File file) throws HandlerException {
if (!fileFixups.containsKey(file.getID())) {
throw new RuntimeException("File " + file.getID() + " missing: " + file.getISOPath());
}
Fixup locationFixup = (Fixup) fileFixups.get(file.getID());
int location = helper.getCurrentLocation();
// Hardlink support for ISO9660Files that have the same underlying File
if (locationFixups.containsKey(file.getContentID())) {
location = ((Integer) locationFixups.get(file.getContentID())).intValue();
} else {
locationFixups.put(file.getContentID(), new Integer(location));
}
// Write and close File Fixup
locationFixup.data(new BothWordDataReference(location));
locationFixup.close();
}
public void doEmptyFileFixups() throws HandlerException {
Iterator it = emptyFileFixups.iterator();
while (it.hasNext()) {
streamHandler.startElement(new LogicalSectorElement("DUMMY"));
// Write and close Empty File Fixup
int location = helper.getCurrentLocation();
Fixup locationFixup = (Fixup) it.next();
locationFixup.data(new BothWordDataReference(location));
locationFixup.close();
streamHandler.endElement();
}
}
class DirFixupPair {
Fixup location, length;
}
class ParentInfo {
int location, length;
}
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