diff options
Diffstat (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport')
-rw-r--r-- | OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/FileImportCache.java | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/FileImportCache.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/FileImportCache.java new file mode 100644 index 000000000..ff391af1a --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/FileImportCache.java @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +package org.sufficientlysecure.keychain.keyimport; + +import android.content.Context; +import android.os.Bundle; +import android.os.Parcel; + +import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.KeychainApplication; +import org.sufficientlysecure.keychain.util.Log; + +import java.io.File; +import java.io.FileInputStream; +import java.io.FileNotFoundException; +import java.io.FileOutputStream; +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; + +/** + * When sending large data (over 1MB) through Androids Binder IPC you get + * JavaBinder E !!! FAILED BINDER TRANSACTION !!! + * <p/> + * To overcome this problem, we cache large Parcelables into a file in our private cache directory + * instead of sending them through IPC. + */ +public class FileImportCache { + + private Context mContext; + + private static final String FILENAME = "key_import.pcl"; + private static final String BUNDLE_DATA = "data"; + + public FileImportCache(Context context) { + this.mContext = context; + } + + public void writeCache(ArrayList<ParcelableKeyRing> selectedEntries) throws IOException { + Bundle in = new Bundle(); + in.putParcelableArrayList(BUNDLE_DATA, selectedEntries); + File cacheDir = mContext.getCacheDir(); + if (cacheDir == null) { + // https://groups.google.com/forum/#!topic/android-developers/-694j87eXVU + throw new IOException("cache dir is null!"); + } + File tempFile = new File(mContext.getCacheDir(), FILENAME); + + FileOutputStream fos = new FileOutputStream(tempFile); + Parcel p = Parcel.obtain(); // creating empty parcel object + in.writeToParcel(p, 0); // saving bundle as parcel + fos.write(p.marshall()); // writing parcel to file + fos.flush(); + fos.close(); + } + + public List<ParcelableKeyRing> readCache() throws IOException { + Parcel parcel = Parcel.obtain(); // creating empty parcel object + Bundle out; + File cacheDir = mContext.getCacheDir(); + if (cacheDir == null) { + // https://groups.google.com/forum/#!topic/android-developers/-694j87eXVU + throw new IOException("cache dir is null!"); + } + + File tempFile = new File(cacheDir, FILENAME); + try { + + FileInputStream fis = new FileInputStream(tempFile); + byte[] array = new byte[(int) fis.getChannel().size()]; + fis.read(array, 0, array.length); + fis.close(); + + parcel.unmarshall(array, 0, array.length); + parcel.setDataPosition(0); + out = parcel.readBundle(KeychainApplication.class.getClassLoader()); + out.putAll(out); + + return out.getParcelableArrayList(BUNDLE_DATA); + } finally { + parcel.recycle(); + // delete temp file + tempFile.delete(); + } + } +} |