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*
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* in the documentation and/or other materials provided with the
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* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package org.jf.dexlib2.dexbacked;
import com.google.common.collect.Lists;
import com.google.common.io.ByteStreams;
import org.jf.dexlib2.Opcodes;
import org.jf.dexlib2.dexbacked.DexBackedDexFile.NotADexFile;
import org.jf.dexlib2.dexbacked.ZipDexContainer.ZipDexFile;
import org.jf.dexlib2.iface.MultiDexContainer;
import org.jf.dexlib2.util.DexUtil;
import org.jf.dexlib2.util.DexUtil.InvalidFile;
import org.jf.dexlib2.util.DexUtil.UnsupportedFile;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/**
* Represents a zip file that contains dex files (i.e. an apk or jar file)
*/
public class ZipDexContainer implements MultiDexContainer<ZipDexFile> {
private final File zipFilePath;
private final Opcodes opcodes;
/**
* Constructs a new ZipDexContainer for the given zip file
*
* @param zipFilePath The path to the zip file
* @param opcodes The Opcodes instance to use when loading dex files from this container
*/
public ZipDexContainer(@Nonnull File zipFilePath, @Nonnull Opcodes opcodes) {
this.zipFilePath = zipFilePath;
this.opcodes = opcodes;
}
@Nonnull @Override public Opcodes getOpcodes() {
return opcodes;
}
/**
* Gets a list of the names of dex files in this zip file.
*
* @return A list of the names of dex files in this zip file
*/
@Nonnull @Override public List<String> getDexEntryNames() throws IOException {
List<String> entryNames = Lists.newArrayList();
ZipFile zipFile = getZipFile();
try {
Enumeration<? extends ZipEntry> entriesEnumeration = zipFile.entries();
while (entriesEnumeration.hasMoreElements()) {
ZipEntry entry = entriesEnumeration.nextElement();
if (!isDex(zipFile, entry)) {
continue;
}
entryNames.add(entry.getName());
}
return entryNames;
} finally {
zipFile.close();
}
}
/**
* Loads a dex file from a specific named entry.
*
* @param entryName The name of the entry
* @return A ZipDexFile, or null if there is no entry with the given name
* @throws NotADexFile If the entry isn't a dex file
*/
@Nullable @Override public ZipDexFile getEntry(@Nonnull String entryName) throws IOException {
ZipFile zipFile = getZipFile();
try {
ZipEntry entry = zipFile.getEntry(entryName);
if (entry == null) {
return null;
}
return loadEntry(zipFile, entry);
} finally {
zipFile.close();
}
}
public boolean isZipFile() {
ZipFile zipFile = null;
try {
zipFile = getZipFile();
return true;
} catch (IOException ex) {
return false;
} catch (NotAZipFileException ex) {
return false;
} finally {
if(zipFile != null) {
try {
zipFile.close();
} catch (IOException ex) {
// just eat it
}
}
}
}
public class ZipDexFile extends DexBackedDexFile implements MultiDexContainer.MultiDexFile {
private final String entryName;
protected ZipDexFile(@Nonnull Opcodes opcodes, @Nonnull byte[] buf, @Nonnull String entryName) {
super(opcodes, buf, 0);
this.entryName = entryName;
}
@Nonnull @Override public String getEntryName() {
return entryName;
}
@Nonnull @Override public MultiDexContainer getContainer() {
return ZipDexContainer.this;
}
}
protected boolean isDex(@Nonnull ZipFile zipFile, @Nonnull ZipEntry zipEntry) throws IOException {
InputStream inputStream = new BufferedInputStream(zipFile.getInputStream(zipEntry));
try {
DexUtil.verifyDexHeader(inputStream);
} catch (NotADexFile ex) {
return false;
} catch (InvalidFile ex) {
return false;
} catch (UnsupportedFile ex) {
return false;
} finally {
inputStream.close();
}
return true;
}
protected ZipFile getZipFile() throws IOException {
try {
return new ZipFile(zipFilePath);
} catch (IOException ex) {
throw new NotAZipFileException();
}
}
@Nonnull
protected ZipDexFile loadEntry(@Nonnull ZipFile zipFile, @Nonnull ZipEntry zipEntry) throws IOException {
InputStream inputStream = zipFile.getInputStream(zipEntry);
try {
byte[] buf = ByteStreams.toByteArray(inputStream);
return new ZipDexFile(opcodes, buf, zipEntry.getName());
} finally {
inputStream.close();
}
}
public static class NotAZipFileException extends RuntimeException {
}
}