Instead of a raw AIDL interface, give DropBox a Java

interface (android.os.DropBox); move the Binder interface
behind the scenes.  Make DropBoxEntry into DropBox.Entry.
Make it possible to get a dropbox from an (Application)Context
with the usual getSystemService(DROPBOX_SERVICE) type thing.
Update the tests accordingly.

7 files changed, 348 insertions, 259 deletions

diff --git a/core/java/android/app/ApplicationContext.java b/core/java/android/app/ApplicationContext.java
index f48f150..305ee6a 100644
--- a/core/java/android/app/ApplicationContext.java
+++ b/core/java/android/app/ApplicationContext.java
@@ -70,6 +70,7 @@ import android.net.wifi.IWifiManager;
 import android.net.wifi.WifiManager;
 import android.os.Binder;
 import android.os.Bundle;
+import android.os.DropBox;
 import android.os.FileUtils;
 import android.os.Handler;
 import android.os.IBinder;
@@ -93,6 +94,8 @@ import android.view.inputmethod.InputMethodManager;
 import android.accounts.AccountManager;
 import android.accounts.IAccountManager;
 
+import com.android.internal.os.IDropBoxService;
+
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
@@ -182,6 +185,7 @@ class ApplicationContext extends Context {
     private ClipboardManager mClipboardManager = null;
     private boolean mRestricted;
     private AccountManager mAccountManager; // protected by mSync
+    private DropBox mDropBox = null;
 
     private final Object mSync = new Object();
 
@@ -896,6 +900,8 @@ class ApplicationContext extends Context {
             return getClipboardManager();
         } else if (WALLPAPER_SERVICE.equals(name)) {
             return getWallpaperManager();
+        } else if (DROPBOX_SERVICE.equals(name)) {
+            return getDropBox();
         }
 
         return null;
@@ -1045,7 +1051,7 @@ class ApplicationContext extends Context {
         }
         return mVibrator;
     }
-  
+
     private AudioManager getAudioManager()
     {
         if (mAudioManager == null) {
@@ -1054,6 +1060,17 @@ class ApplicationContext extends Context {
         return mAudioManager;
     }
 
+    private DropBox getDropBox() {
+        synchronized (mSync) {
+            if (mDropBox == null) {
+                IBinder b = ServiceManager.getService(DROPBOX_SERVICE);
+                IDropBoxService service = IDropBoxService.Stub.asInterface(b);
+                mDropBox = new DropBox(service);
+            }
+        }
+        return mDropBox;
+    }
+
     @Override
     public int checkPermission(String permission, int pid, int uid) {
         if (permission == null) {
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index 8f1c671..b4ab408 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -1309,7 +1309,7 @@ public abstract class Context {
      * @see #getSystemService
      */
     public static final String APPWIDGET_SERVICE = "appwidget";
-    
+
     /**
      * Use with {@link #getSystemService} to retrieve an
      * {@blink android.backup.IBackupManager IBackupManager} for communicating
@@ -1319,7 +1319,16 @@ public abstract class Context {
      * @see #getSystemService
      */
     public static final String BACKUP_SERVICE = "backup";
-    
+
+    /**
+     * Use with {@link #getSystemService} to retrieve a
+     * {@blink android.os.DropBox DropBox} instance for recording
+     * diagnostic logs.
+     * @hide
+     * @see #getSystemService
+     */
+    public static final String DROPBOX_SERVICE = "dropbox";
+
     /**
      * Determine whether the given permission is allowed for a particular
      * process and user ID running in the system.
diff --git a/core/java/android/os/DropBoxEntry.aidl b/core/java/android/os/DropBox.aidl
index 225eee1..77abd22 100644
--- a/core/java/android/os/DropBoxEntry.aidl
+++ b/core/java/android/os/DropBox.aidl
@@ -16,4 +16,4 @@
 
 package android.os;
 
-parcelable DropBoxEntry;
+parcelable DropBox.Entry;
diff --git a/core/java/android/os/DropBox.java b/core/java/android/os/DropBox.java
new file mode 100644
index 0000000..0551dc1
--- /dev/null
+++ b/core/java/android/os/DropBox.java
@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.os;
+
+import android.util.Log;
+
+import com.android.internal.os.IDropBoxService;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.GZIPInputStream;
+
+/**
+ * Enqueues chunks of data (from various sources -- application crashes, kernel
+ * log records, etc.).  The queue is size bounded and will drop old data if the
+ * enqueued data exceeds the maximum size.  You can think of this as a
+ * persistent, system-wide, blob-oriented "logcat".
+ *
+ * <p>You can obtain an instance of this class by calling
+ * {@link android.content.Context#getSystemService}
+ * with {@link android.content.Context#DROPBOX_SERVICE}.
+ *
+ * <p>DropBox entries are not sent anywhere directly, but other system services
+ * and debugging tools may scan and upload entries for processing.
+ *
+ * {@pending}
+ */
+public class DropBox {
+    private static final String TAG = "DropBox";
+    private final IDropBoxService mService;
+
+    /** Flag value: Entry's content was deleted to save space. */
+    public static final int IS_EMPTY = 1;
+
+    /** Flag value: Content is human-readable UTF-8 text (can be combined with IS_GZIPPED). */
+    public static final int IS_TEXT = 2;
+
+    /** Flag value: Content can be decompressed with {@link GZIPOutputStream}. */
+    public static final int IS_GZIPPED = 4;
+
+    /**
+     * A single entry retrieved from the drop box.
+     * This may include a reference to a stream, so you must call
+     * {@link #close()} when you are done using it.
+     */
+    public static class Entry implements Parcelable {
+        private final String mTag;
+        private final long mTimeMillis;
+
+        private final byte[] mData;
+        private final ParcelFileDescriptor mFileDescriptor;
+        private final int mFlags;
+
+        /** Create a new empty Entry with no contents. */
+        public Entry(String tag, long millis) {
+            this(tag, millis, (Object) null, IS_EMPTY);
+        }
+
+        /** Create a new Entry with plain text contents. */
+        public Entry(String tag, long millis, String text) {
+            this(tag, millis, (Object) text.getBytes(), IS_TEXT);
+        }
+
+        /**
+         * Create a new Entry with byte array contents.
+         * The data array must not be modified after creating this entry.
+         */
+        public Entry(String tag, long millis, byte[] data, int flags) {
+            this(tag, millis, (Object) data, flags);
+        }
+
+        /**
+         * Create a new Entry with streaming data contents.
+         * Takes ownership of the ParcelFileDescriptor.
+         */
+        public Entry(String tag, long millis, ParcelFileDescriptor data, int flags) {
+            this(tag, millis, (Object) data, flags);
+        }
+
+        /**
+         * Create a new Entry with the contents read from a file.
+         * The file will be read when the entry's contents are requested.
+         */
+        public Entry(String tag, long millis, File data, int flags) throws IOException {
+            this(tag, millis, (Object) ParcelFileDescriptor.open(
+                    data, ParcelFileDescriptor.MODE_READ_ONLY), flags);
+        }
+
+        /** Internal constructor for CREATOR.createFromParcel(). */
+        private Entry(String tag, long millis, Object value, int flags) {
+            if (tag == null) throw new NullPointerException();
+            if (((flags & IS_EMPTY) != 0) != (value == null)) throw new IllegalArgumentException();
+
+            mTag = tag;
+            mTimeMillis = millis;
+            mFlags = flags;
+
+            if (value == null) {
+                mData = null;
+                mFileDescriptor = null;
+            } else if (value instanceof byte[]) {
+                mData = (byte[]) value;
+                mFileDescriptor = null;
+            } else if (value instanceof ParcelFileDescriptor) {
+                mData = null;
+                mFileDescriptor = (ParcelFileDescriptor) value;
+            } else {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        /** Close the input stream associated with this entry. */
+        public void close() {
+            try { if (mFileDescriptor != null) mFileDescriptor.close(); } catch (IOException e) { }
+        }
+
+        /** @return the tag originally attached to the entry. */
+        public String getTag() { return mTag; }
+
+        /** @return time when the entry was originally created. */
+        public long getTimeMillis() { return mTimeMillis; }
+
+        /** @return flags describing the content returned by @{link #getInputStream()}. */
+        public int getFlags() { return mFlags & ~IS_GZIPPED; }  // getInputStream() decompresses.
+
+        /**
+         * @param maxBytes of string to return (will truncate at this length).
+         * @return the uncompressed text contents of the entry, null if the entry is not text.
+         */
+        public String getText(int maxBytes) {
+            if ((mFlags & IS_TEXT) == 0) return null;
+            if (mData != null) return new String(mData, 0, Math.min(maxBytes, mData.length));
+
+            InputStream is = null;
+            try {
+                is = getInputStream();
+                byte[] buf = new byte[maxBytes];
+                return new String(buf, 0, Math.max(0, is.read(buf)));
+            } catch (IOException e) {
+                return null;
+            } finally {
+                try { if (is != null) is.close(); } catch (IOException e) {}
+            }
+        }
+
+        /** @return the uncompressed contents of the entry, or null if the contents were lost */
+        public InputStream getInputStream() throws IOException {
+            InputStream is;
+            if (mData != null) {
+                is = new ByteArrayInputStream(mData);
+            } else if (mFileDescriptor != null) {
+                is = new ParcelFileDescriptor.AutoCloseInputStream(mFileDescriptor);
+            } else {
+                return null;
+            }
+            return (mFlags & IS_GZIPPED) != 0 ? new GZIPInputStream(is) : is;
+        }
+
+        public static final Parcelable.Creator<Entry> CREATOR = new Parcelable.Creator() {
+            public Entry[] newArray(int size) { return new Entry[size]; }
+            public Entry createFromParcel(Parcel in) {
+                return new Entry(
+                        in.readString(), in.readLong(), in.readValue(null), in.readInt());
+            }
+        };
+
+        public int describeContents() {
+            return mFileDescriptor != null ? Parcelable.CONTENTS_FILE_DESCRIPTOR : 0;
+        }
+
+        public void writeToParcel(Parcel out, int flags) {
+            out.writeString(mTag);
+            out.writeLong(mTimeMillis);
+            if (mFileDescriptor != null) {
+                out.writeValue(mFileDescriptor);
+            } else {
+                out.writeValue(mData);
+            }
+            out.writeInt(mFlags);
+        }
+    }
+
+    /** {@hide} */
+    public DropBox(IDropBoxService service) { mService = service; }
+
+    /**
+     * Create a dummy instance for testing.  All methods will fail unless
+     * overridden with an appropriate mock implementation.  To obtain a
+     * functional instance, use {@link android.content.Context#getSystemService}.
+     */
+    protected DropBox() { mService = null; }
+
+    /**
+     * Stores human-readable text.  The data may be discarded eventually (or even
+     * immediately) if space is limited, or ignored entirely if the tag has been
+     * blocked (see {@link #isTagEnabled}).
+     *
+     * @param tag describing the type of entry being stored
+     * @param data value to store
+     */
+    public void addText(String tag, String data) {
+        try { mService.add(new Entry(tag, 0, data)); } catch (RemoteException e) {}
+    }
+
+    /**
+     * Stores binary data, which may be ignored or discarded as with {@link #addText}.
+     *
+     * @param tag describing the type of entry being stored
+     * @param data value to store
+     * @param flags describing the data
+     */
+    public void addData(String tag, byte[] data, int flags) {
+        if (data == null) throw new NullPointerException();
+        try { mService.add(new Entry(tag, 0, data, flags)); } catch (RemoteException e) {}
+    }
+
+    /**
+     * Stores data read from a file descriptor.  The data may be ignored or
+     * discarded as with {@link #addText}.  You must close your
+     * ParcelFileDescriptor object after calling this method!
+     *
+     * @param tag describing the type of entry being stored
+     * @param fd file descriptor to read from
+     * @param flags describing the data
+     */
+    public void addFile(String tag, ParcelFileDescriptor fd, int flags) {
+        if (fd == null) throw new NullPointerException();
+        try { mService.add(new Entry(tag, 0, fd, flags)); } catch (RemoteException e) {}
+    }
+
+    /**
+     * Checks any blacklists (set in system settings) to see whether a certain
+     * tag is allowed.  Entries with disabled tags will be dropped immediately,
+     * so you can save the work of actually constructing and sending the data.
+     *
+     * @param tag that would be used in {@link #addText} or {@link #addFile}
+     * @return whether events with that tag would be accepted
+     */
+    public boolean isTagEnabled(String tag) {
+        try { return mService.isTagEnabled(tag); } catch (RemoteException e) { return false; }
+    }
+
+    /**
+     * Gets the next entry from the drop box *after* the specified time.
+     * Requires android.permission.READ_LOGS.  You must always call
+     * {@link Entry#close()} on the return value!
+     *
+     * @param tag of entry to look for, null for all tags
+     * @param msec time of the last entry seen
+     * @return the next entry, or null if there are no more entries
+     */
+    public Entry getNextEntry(String tag, long msec) {
+        try { return mService.getNextEntry(tag, msec); } catch (RemoteException e) { return null; }
+    }
+
+    // TODO: It may be useful to have some sort of notification mechanism
+    // when data is added to the dropbox, for demand-driven readers --
+    // for now readers need to poll the dropbox to find new data.
+}
diff --git a/core/java/android/os/DropBoxEntry.java b/core/java/android/os/DropBoxEntry.java
deleted file mode 100644
index e3816a8..0000000
--- a/core/java/android/os/DropBoxEntry.java
+++ /dev/null
@@ -1,163 +0,0 @@
-/*
- * Copyright (C) 2009 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.os;
-
-import java.io.ByteArrayInputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.Reader;
-import java.io.StringReader;
-import java.util.zip.GZIPInputStream;
-
-/**
- * A single entry retrieved from an {@link IDropBox} implementation.
- * This may include a reference to a stream, so you must call
- * {@link #close()} when you are done using it.
- *
- * {@pending}
- */
-public class DropBoxEntry implements Parcelable {
-    private final String mTag;
-    private final long mTimeMillis;
-
-    private final String mText;
-    private final ParcelFileDescriptor mFileDescriptor;
-    private final int mFlags;
-
-    /** Flag value: Entry's content was deleted to save space. */
-    public static final int IS_EMPTY = 1;
-
-    /** Flag value: Content is human-readable UTF-8 text (possibly compressed). */
-    public static final int IS_TEXT = 2;
-
-    /** Flag value: Content can been decompressed with {@link GZIPOutputStream}. */
-    public static final int IS_GZIPPED = 4;
-
-    /** Create a new DropBoxEntry with the specified contents. */
-    public DropBoxEntry(String tag, long timeMillis, String text) {
-        if (tag == null || text == null) throw new NullPointerException();
-        mTag = tag;
-        mTimeMillis = timeMillis;
-        mText = text;
-        mFileDescriptor = null;
-        mFlags = IS_TEXT;
-    }
-
-    /** Create a new DropBoxEntry with the specified contents. */
-    public DropBoxEntry(String tag, long millis, File data, int flags) throws IOException {
-        if (tag == null) throw new NullPointerException();
-        if (((flags & IS_EMPTY) != 0) != (data == null)) throw new IllegalArgumentException();
-
-        mTag = tag;
-        mTimeMillis = millis;
-        mText = null;
-        mFlags = flags;
-        mFileDescriptor = data == null ? null :
-                ParcelFileDescriptor.open(data, ParcelFileDescriptor.MODE_READ_ONLY);
-    }
-
-    /** Internal constructor for CREATOR.createFromParcel(). */
-    private DropBoxEntry(String tag, long millis, Object value, int flags) {
-        if (tag == null) throw new NullPointerException();
-        if (((flags & IS_EMPTY) != 0) != (value == null)) throw new IllegalArgumentException();
-
-        mTag = tag;
-        mTimeMillis = millis;
-        mFlags = flags;
-
-        if (value == null) {
-            mText = null;
-            mFileDescriptor = null;
-        } else if (value instanceof String) {
-            if ((flags & IS_TEXT) == 0) throw new IllegalArgumentException();
-            mText = (String) value;
-            mFileDescriptor = null;
-        } else if (value instanceof ParcelFileDescriptor) {
-            mText = null;
-            mFileDescriptor = (ParcelFileDescriptor) value;
-        } else {
-            throw new IllegalArgumentException();
-        }
-    }
-
-    /** Close the input stream associated with this entry. */
-    public synchronized void close() {
-        try { if (mFileDescriptor != null) mFileDescriptor.close(); } catch (IOException e) { }
-    }
-
-    /** @return the tag originally attached to the entry. */
-    public String getTag() { return mTag; }
-
-    /** @return time when the entry was originally created. */
-    public long getTimeMillis() { return mTimeMillis; }
-
-    /** @return flags describing the content returned by @{link #getInputStream()}. */
-    public int getFlags() { return mFlags & ~IS_GZIPPED; }  // getInputStream() decompresses.
-
-    /**
-     * @param maxLength of string to return (will truncate at this length).
-     * @return the uncompressed text contents of the entry, null if the entry is not text.
-     */
-    public String getText(int maxLength) {
-        if (mText != null) return mText.substring(0, Math.min(maxLength, mText.length()));
-        if ((mFlags & IS_TEXT) == 0) return null;
-
-        try {
-            InputStream stream = getInputStream();
-            if (stream == null) return null;
-            char[] buf = new char[maxLength];
-            InputStreamReader reader = new InputStreamReader(stream);
-            return new String(buf, 0, Math.max(0, reader.read(buf)));
-        } catch (IOException e) {
-            return null;
-        }
-    }
-
-    /** @return the uncompressed contents of the entry, or null if the contents were lost */
-    public InputStream getInputStream() throws IOException {
-        if (mText != null) return new ByteArrayInputStream(mText.getBytes("UTF8"));
-        if (mFileDescriptor == null) return null;
-        InputStream is = new ParcelFileDescriptor.AutoCloseInputStream(mFileDescriptor);
-        return (mFlags & IS_GZIPPED) != 0 ? new GZIPInputStream(is) : is;
-    }
-
-    public static final Parcelable.Creator<DropBoxEntry> CREATOR = new Parcelable.Creator() {
-        public DropBoxEntry[] newArray(int size) { return new DropBoxEntry[size]; }
-        public DropBoxEntry createFromParcel(Parcel in) {
-            return new DropBoxEntry(
-                    in.readString(), in.readLong(), in.readValue(null), in.readInt());
-        }
-    };
-
-    public int describeContents() {
-        return mFileDescriptor != null ? Parcelable.CONTENTS_FILE_DESCRIPTOR : 0;
-    }
-
-    public void writeToParcel(Parcel out, int flags) {
-        out.writeString(mTag);
-        out.writeLong(mTimeMillis);
-        if (mFileDescriptor != null) {
-            out.writeValue(mFileDescriptor);
-        } else {
-            out.writeValue(mText);
-        }
-        out.writeInt(mFlags);
-    }
-}
diff --git a/core/java/android/os/IDropBox.aidl b/core/java/android/os/IDropBox.aidl
deleted file mode 100644
index 26294b6..0000000
--- a/core/java/android/os/IDropBox.aidl
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Copyright (C) 2009 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.os;
-
-import android.os.DropBoxEntry;
-import android.os.ParcelFileDescriptor;
-
-/**
- * Enqueues chunks of data (from various sources -- application crashes, kernel
- * log records, etc.).  The queue is size bounded and will drop old data if the
- * enqueued data exceeds the maximum size.
- *
- * <p>This interface is implemented by a system service you can access:
- *
- * <pre>IDropBox.Stub.asInterface(ServiceManager.getService("dropbox"));</pre>
- *
- * <p>Other system services and debugging tools may scan the drop box to upload
- * entries for processing.
- *
- * {@pending}
- */
-interface IDropBox {
-    /**
-     * Stores human-readable text.  The data may be discarded eventually (or even
-     * immediately) if space is limited, or ignored entirely if the tag has been
-     * blocked (see {@link #isTagEnabled}).
-     *
-     * @param tag describing the type of entry being stored
-     * @param data value to store
-     */
-    void addText(String tag, String data);
-
-    /**
-     * Stores binary data.  The data may be ignored or discarded as with
-     * {@link #addText}.
-     *
-     * @param tag describing the type of entry being stored
-     * @param data value to store
-     * @param flags describing the data, defined in {@link DropBoxEntry}
-     */
-    void addData(String tag, in byte[] data, int flags);
-
-    /**
-     * Stores data read from a file descriptor.  The data may be ignored or
-     * discarded as with {@link #addText}.  You must close your
-     * ParcelFileDescriptor object after calling this method!
-     *
-     * @param tag describing the type of entry being stored
-     * @param data file descriptor to read from
-     * @param flags describing the data, defined in {@link DropBoxEntry}
-     */
-    void addFile(String tag, in ParcelFileDescriptor data, int flags);
-
-    /**
-     * Checks any blacklists (set in system settings) to see whether a certain
-     * tag is allowed.  Entries with disabled tags will be dropped immediately,
-     * so you can save the work of actually constructing and sending the data.
-     *
-     * @param tag that would be used in {@link #addText} or {@link #addFile}
-     * @return whether events with that tag would be accepted
-     */
-    boolean isTagEnabled(String tag);
-
-    /**
-     * Gets the next entry from the drop box *after* the specified time.
-     * Requires android.permission.READ_LOGS.  You must always call
-     * {@link DropBoxEntry#close()} on the return value!
-     *
-     * @param tag of entry to look for, null for all tags
-     * @param millis time of the last entry seen
-     * @return the next entry, or null if there are no more entries
-     */
-    DropBoxEntry getNextEntry(String tag, long millis);
-
-    // TODO: It may be useful to have some sort of notification mechanism
-    // when data is added to the dropbox, for demand-driven readers --
-    // for now readers need to poll the dropbox to find new data.
-}
diff --git a/core/java/com/android/internal/os/IDropBoxService.aidl b/core/java/com/android/internal/os/IDropBoxService.aidl
new file mode 100644
index 0000000..f940041
--- /dev/null
+++ b/core/java/com/android/internal/os/IDropBoxService.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.os;
+
+import android.os.DropBox;
+import android.os.ParcelFileDescriptor;
+
+/**
+ * "Backend" interface used by {@link android.os.DropBox} to talk to the
+ * DropBoxService that actually implements the drop box functionality.
+ *
+ * @see DropBox
+ * @hide
+ */
+interface IDropBoxService {
+    /**
+     * @see DropBox#addText
+     * @see DropBox#addData
+     * @see DropBox#addFile
+     */
+    void add(in DropBox.Entry entry);
+
+    /** @see DropBox#getNextEntry */
+    boolean isTagEnabled(String tag);
+
+    /** @see DropBox#getNextEntry */
+    DropBox.Entry getNextEntry(String tag, long millis);
+}