de.robv.android.xposed.services.DirectAccessService Maven / Gradle / Ivy
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package de.robv.android.xposed.services;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
/** @hide */
public final class DirectAccessService extends BaseService {
@Override
public boolean hasDirectFileAccess() {
return true;
}
@SuppressWarnings("RedundantIfStatement")
@Override
public boolean checkFileAccess(String filename, int mode) {
File file = new File(filename);
if (mode == F_OK && !file.exists()) return false;
if ((mode & R_OK) != 0 && !file.canRead()) return false;
if ((mode & W_OK) != 0 && !file.canWrite()) return false;
if ((mode & X_OK) != 0 && !file.canExecute()) return false;
return true;
}
@Override
public boolean checkFileExists(String filename) {
return new File(filename).exists();
}
@Override
public FileResult statFile(String filename) throws IOException {
File file = new File(filename);
return new FileResult(file.length(), file.lastModified());
}
@Override
public byte[] readFile(String filename) throws IOException {
File file = new File(filename);
byte content[] = new byte[(int)file.length()];
FileInputStream fis = new FileInputStream(file);
fis.read(content);
fis.close();
return content;
}
@Override
public FileResult readFile(String filename, long previousSize, long previousTime) throws IOException {
File file = new File(filename);
long size = file.length();
long time = file.lastModified();
if (previousSize == size && previousTime == time)
return new FileResult(size, time);
return new FileResult(readFile(filename), size, time);
}
@Override
public FileResult readFile(String filename, int offset, int length, long previousSize, long previousTime) throws IOException {
File file = new File(filename);
long size = file.length();
long time = file.lastModified();
if (previousSize == size && previousTime == time)
return new FileResult(size, time);
// Shortcut for the simple case
if (offset <= 0 && length <= 0)
return new FileResult(readFile(filename), size, time);
// Check range
if (offset > 0 && offset >= size) {
throw new IllegalArgumentException("Offset " + offset + " is out of range for " + filename);
} else if (offset < 0) {
offset = 0;
}
if (length > 0 && (offset + length) > size) {
throw new IllegalArgumentException("Length " + length + " is out of range for " + filename);
} else if (length <= 0) {
length = (int) (size - offset);
}
byte content[] = new byte[length];
FileInputStream fis = new FileInputStream(file);
fis.skip(offset);
fis.read(content);
fis.close();
return new FileResult(content, size, time);
}
/**
* {@inheritDoc}
* This implementation returns a BufferedInputStream instead of loading the file into memory.
*/
@Override
public InputStream getFileInputStream(String filename) throws IOException {
return new BufferedInputStream(new FileInputStream(filename), 16*1024);
}
/**
* {@inheritDoc}
*
This implementation returns a BufferedInputStream instead of loading the file into memory.
*/
@Override
public FileResult getFileInputStream(String filename, long previousSize, long previousTime) throws IOException {
File file = new File(filename);
long size = file.length();
long time = file.lastModified();
if (previousSize == size && previousTime == time)
return new FileResult(size, time);
return new FileResult(new BufferedInputStream(new FileInputStream(filename), 16*1024), size, time);
}
}