/*
 * Copyright (C) 2006 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.content;

import android.app.ActivityManager;
import android.os.Bundle;
import android.os.RemoteException;
import android.os.Handler;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.UserHandle;
import android.util.AndroidException;


A description of an Intent and target action to perform with it.
The returned object can be
handed to other applications so that they can perform the action you
described on your behalf at a later time.
By giving a IntentSender to another application,
you are granting it the right to perform the operation you have specified
as if the other application was yourself (with the same permissions and
identity).  As such, you should be careful about how you build the IntentSender:
often, for example, the base Intent you supply will have the component
name explicitly set to one of your own components, to ensure it is ultimately
sent there and nowhere else.
A IntentSender itself is simply a reference to a token maintained by
the system describing the original data used to retrieve it.  This means
that, even if its owning application's process is killed, the
IntentSender itself will remain usable from other processes that
have been given it.  If the creating application later re-retrieves the
same kind of IntentSender (same operation, same Intent action, data,
categories, and components, and same flags), it will receive a IntentSender
representing the same token if that is still valid.
Instances of this class can not be made directly, but rather must be created from an existing PendingIntent with PendingIntent.getIntentSender(). /**
 * A description of an Intent and target action to perform with it.
 * The returned object can be
 * handed to other applications so that they can perform the action you
 * described on your behalf at a later time.
 *
 * <p>By giving a IntentSender to another application,
 * you are granting it the right to perform the operation you have specified
 * as if the other application was yourself (with the same permissions and
 * identity).  As such, you should be careful about how you build the IntentSender:
 * often, for example, the base Intent you supply will have the component
 * name explicitly set to one of your own components, to ensure it is ultimately
 * sent there and nowhere else.
 *
 * <p>A IntentSender itself is simply a reference to a token maintained by
 * the system describing the original data used to retrieve it.  This means
 * that, even if its owning application's process is killed, the
 * IntentSender itself will remain usable from other processes that
 * have been given it.  If the creating application later re-retrieves the
 * same kind of IntentSender (same operation, same Intent action, data,
 * categories, and components, and same flags), it will receive a IntentSender
 * representing the same token if that is still valid.
 *
 * <p>Instances of this class can not be made directly, but rather must be
 * created from an existing {@link android.app.PendingIntent} with
 * {@link android.app.PendingIntent#getIntentSender() PendingIntent.getIntentSender()}.
 */
public class IntentSender implements Parcelable {
    private final IIntentSender mTarget;
    IBinder mWhitelistToken;

    
Exception thrown when trying to send through a PendingIntent that
has been canceled or is otherwise no longer able to execute the request.
/**
     * Exception thrown when trying to send through a PendingIntent that
     * has been canceled or is otherwise no longer able to execute the request.
     */
    public static class SendIntentException extends AndroidException {
        public SendIntentException() {
        }

        public SendIntentException(String name) {
            super(name);
        }

        public SendIntentException(Exception cause) {
            super(cause);
        }
    }

    
Callback interface for discovering when a send operation has completed. Primarily for use with a IntentSender that is performing a broadcast, this provides the same information as calling 
Context.sendBroadcast() with a final BroadcastReceiver. /**
     * Callback interface for discovering when a send operation has
     * completed.  Primarily for use with a IntentSender that is
     * performing a broadcast, this provides the same information as
     * calling {@link Context#sendOrderedBroadcast(Intent, String,
     * android.content.BroadcastReceiver, Handler, int, String, Bundle)
     * Context.sendBroadcast()} with a final BroadcastReceiver.
     */
    public interface OnFinished {
        
Called when a send operation as completed.
Params:
IntentSender – The IntentSender this operation was sent through.
intent – The original Intent that was sent.
resultCode – The final result code determined by the send.
resultData – The final data collected by a broadcast.
resultExtras – The final extras collected by a broadcast./**
         * Called when a send operation as completed.
         *
         * @param IntentSender The IntentSender this operation was sent through.
         * @param intent The original Intent that was sent.
         * @param resultCode The final result code determined by the send.
         * @param resultData The final data collected by a broadcast.
         * @param resultExtras The final extras collected by a broadcast.
         */
        void onSendFinished(IntentSender IntentSender, Intent intent,
                int resultCode, String resultData, Bundle resultExtras);
    }

    private static class FinishedDispatcher extends IIntentReceiver.Stub
            implements Runnable {
        private final IntentSender mIntentSender;
        private final OnFinished mWho;
        private final Handler mHandler;
        private Intent mIntent;
        private int mResultCode;
        private String mResultData;
        private Bundle mResultExtras;
        FinishedDispatcher(IntentSender pi, OnFinished who, Handler handler) {
            mIntentSender = pi;
            mWho = who;
            mHandler = handler;
        }
        public void performReceive(Intent intent, int resultCode, String data,
                Bundle extras, boolean serialized, boolean sticky, int sendingUser) {
            mIntent = intent;
            mResultCode = resultCode;
            mResultData = data;
            mResultExtras = extras;
            if (mHandler == null) {
                run();
            } else {
                mHandler.post(this);
            }
        }
        public void run() {
            mWho.onSendFinished(mIntentSender, mIntent, mResultCode,
                    mResultData, mResultExtras);
        }
    }

    
Perform the operation associated with this IntentSender, allowing the
caller to specify information about the Intent to use and be notified
when the send has completed.
Params:
context – The Context of the caller.  This may be null if
intent is also null.
code – Result code to supply back to the IntentSender's target.
intent – Additional Intent data. See 
Intent.fillIn() for information on how this is applied to the original Intent. Use null to not modify the original Intent.
onFinished – The object to call back on when the send has
completed, or null for no callback.
handler – Handler identifying the thread on which the callback
should happen.  If null, the callback will happen from the thread
pool of the process.
Throws:
SendIntentException – Throws CanceledIntentException if the IntentSender
is no longer allowing more intents to be sent through it./**
     * Perform the operation associated with this IntentSender, allowing the
     * caller to specify information about the Intent to use and be notified
     * when the send has completed.
     *
     * @param context The Context of the caller.  This may be null if
     * <var>intent</var> is also null.
     * @param code Result code to supply back to the IntentSender's target.
     * @param intent Additional Intent data.  See {@link Intent#fillIn
     * Intent.fillIn()} for information on how this is applied to the
     * original Intent.  Use null to not modify the original Intent.
     * @param onFinished The object to call back on when the send has
     * completed, or null for no callback.
     * @param handler Handler identifying the thread on which the callback
     * should happen.  If null, the callback will happen from the thread
     * pool of the process.
     *
     *
     * @throws SendIntentException Throws CanceledIntentException if the IntentSender
     * is no longer allowing more intents to be sent through it.
     */
    public void sendIntent(Context context, int code, Intent intent,
            OnFinished onFinished, Handler handler) throws SendIntentException {
        sendIntent(context, code, intent, onFinished, handler, null);
    }

    
Perform the operation associated with this IntentSender, allowing the
caller to specify information about the Intent to use and be notified
when the send has completed.
Params:
context – The Context of the caller.  This may be null if
intent is also null.
code – Result code to supply back to the IntentSender's target.
intent – Additional Intent data. See 
Intent.fillIn() for information on how this is applied to the original Intent. Use null to not modify the original Intent.
onFinished – The object to call back on when the send has
completed, or null for no callback.
handler – Handler identifying the thread on which the callback
should happen.  If null, the callback will happen from the thread
pool of the process.
requiredPermission – Name of permission that a recipient of the PendingIntent is required to hold. This is only valid for broadcast intents, and corresponds to the permission argument in Context.sendOrderedBroadcast(Intent, String). If null, no permission is required.
Throws:
SendIntentException – Throws CanceledIntentException if the IntentSender
is no longer allowing more intents to be sent through it./**
     * Perform the operation associated with this IntentSender, allowing the
     * caller to specify information about the Intent to use and be notified
     * when the send has completed.
     *
     * @param context The Context of the caller.  This may be null if
     * <var>intent</var> is also null.
     * @param code Result code to supply back to the IntentSender's target.
     * @param intent Additional Intent data.  See {@link Intent#fillIn
     * Intent.fillIn()} for information on how this is applied to the
     * original Intent.  Use null to not modify the original Intent.
     * @param onFinished The object to call back on when the send has
     * completed, or null for no callback.
     * @param handler Handler identifying the thread on which the callback
     * should happen.  If null, the callback will happen from the thread
     * pool of the process.
     * @param requiredPermission Name of permission that a recipient of the PendingIntent
     * is required to hold.  This is only valid for broadcast intents, and
     * corresponds to the permission argument in
     * {@link Context#sendBroadcast(Intent, String) Context.sendOrderedBroadcast(Intent, String)}.
     * If null, no permission is required.
     *
     *
     * @throws SendIntentException Throws CanceledIntentException if the IntentSender
     * is no longer allowing more intents to be sent through it.
     */
    public void sendIntent(Context context, int code, Intent intent,
            OnFinished onFinished, Handler handler, String requiredPermission)
            throws SendIntentException {
        try {
            String resolvedType = intent != null ?
                    intent.resolveTypeIfNeeded(context.getContentResolver())
                    : null;
            int res = ActivityManager.getService().sendIntentSender(mTarget, mWhitelistToken,
                    code, intent, resolvedType,
                    onFinished != null
                            ? new FinishedDispatcher(this, onFinished, handler)
                            : null,
                    requiredPermission, null);
            if (res < 0) {
                throw new SendIntentException();
            }
        } catch (RemoteException e) {
            throw new SendIntentException();
        }
    }

    
Deprecated:
Renamed to getCreatorPackage()./**
     * @deprecated Renamed to {@link #getCreatorPackage()}.
     */
    @Deprecated
    public String getTargetPackage() {
        try {
            return ActivityManager.getService()
                .getPackageForIntentSender(mTarget);
        } catch (RemoteException e) {
            // Should never happen.
            return null;
        }
    }

    
Return the package name of the application that created this
IntentSender, that is the identity under which you will actually be
sending the Intent.  The returned string is supplied by the system, so
that an application can not spoof its package.
Returns:
The package name of the PendingIntent, or null if there is
none associated with it./**
     * Return the package name of the application that created this
     * IntentSender, that is the identity under which you will actually be
     * sending the Intent.  The returned string is supplied by the system, so
     * that an application can not spoof its package.
     *
     * @return The package name of the PendingIntent, or null if there is
     * none associated with it.
     */
    public String getCreatorPackage() {
        try {
            return ActivityManager.getService()
                .getPackageForIntentSender(mTarget);
        } catch (RemoteException e) {
            // Should never happen.
            return null;
        }
    }

    
Return the uid of the application that created this
PendingIntent, that is the identity under which you will actually be
sending the Intent.  The returned integer is supplied by the system, so
that an application can not spoof its uid.
Returns:
The uid of the PendingIntent, or -1 if there is
none associated with it./**
     * Return the uid of the application that created this
     * PendingIntent, that is the identity under which you will actually be
     * sending the Intent.  The returned integer is supplied by the system, so
     * that an application can not spoof its uid.
     *
     * @return The uid of the PendingIntent, or -1 if there is
     * none associated with it.
     */
    public int getCreatorUid() {
        try {
            return ActivityManager.getService()
                .getUidForIntentSender(mTarget);
        } catch (RemoteException e) {
            // Should never happen.
            return -1;
        }
    }

    
Return the user handle of the application that created this PendingIntent, that is the user under which you will actually be sending the Intent. The returned UserHandle is supplied by the system, so that an application can not spoof its user. See Process.myUserHandle() for more explanation of user handles. 
Returns:
The user handle of the PendingIntent, or null if there is
none associated with it./**
     * Return the user handle of the application that created this
     * PendingIntent, that is the user under which you will actually be
     * sending the Intent.  The returned UserHandle is supplied by the system, so
     * that an application can not spoof its user.  See
     * {@link android.os.Process#myUserHandle() Process.myUserHandle()} for
     * more explanation of user handles.
     *
     * @return The user handle of the PendingIntent, or null if there is
     * none associated with it.
     */
    public UserHandle getCreatorUserHandle() {
        try {
            int uid = ActivityManager.getService()
                .getUidForIntentSender(mTarget);
            return uid > 0 ? new UserHandle(UserHandle.getUserId(uid)) : null;
        } catch (RemoteException e) {
            // Should never happen.
            return null;
        }
    }

    
Comparison operator on two IntentSender objects, such that true
is returned then they both represent the same operation from the
same package.
/**
     * Comparison operator on two IntentSender objects, such that true
     * is returned then they both represent the same operation from the
     * same package.
     */
    @Override
    public boolean equals(Object otherObj) {
        if (otherObj instanceof IntentSender) {
            return mTarget.asBinder().equals(((IntentSender)otherObj)
                    .mTarget.asBinder());
        }
        return false;
    }

    @Override
    public int hashCode() {
        return mTarget.asBinder().hashCode();
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder(128);
        sb.append("IntentSender{");
        sb.append(Integer.toHexString(System.identityHashCode(this)));
        sb.append(": ");
        sb.append(mTarget != null ? mTarget.asBinder() : null);
        sb.append('}');
        return sb.toString();
    }

    public int describeContents() {
        return 0;
    }

    public void writeToParcel(Parcel out, int flags) {
        out.writeStrongBinder(mTarget.asBinder());
    }

    public static final Parcelable.Creator<IntentSender> CREATOR
            = new Parcelable.Creator<IntentSender>() {
        public IntentSender createFromParcel(Parcel in) {
            IBinder target = in.readStrongBinder();
            return target != null ? new IntentSender(target) : null;
        }

        public IntentSender[] newArray(int size) {
            return new IntentSender[size];
        }
    };

    
Convenience function for writing either a IntentSender or null pointer to a Parcel. You must use this with readIntentSenderOrNullFromParcel for later reading it. 
Params:
sender – The IntentSender to write, or null.
out – Where to write the IntentSender./**
     * Convenience function for writing either a IntentSender or null pointer to
     * a Parcel.  You must use this with {@link #readIntentSenderOrNullFromParcel}
     * for later reading it.
     *
     * @param sender The IntentSender to write, or null.
     * @param out Where to write the IntentSender.
     */
    public static void writeIntentSenderOrNullToParcel(IntentSender sender,
            Parcel out) {
        out.writeStrongBinder(sender != null ? sender.mTarget.asBinder()
                : null);
    }

    
Convenience function for reading either a Messenger or null pointer from a Parcel. You must have previously written the Messenger with writeIntentSenderOrNullToParcel. 
Params:
in – The Parcel containing the written Messenger.
Returns:
Returns the Messenger read from the Parcel, or null if null had
been written./**
     * Convenience function for reading either a Messenger or null pointer from
     * a Parcel.  You must have previously written the Messenger with
     * {@link #writeIntentSenderOrNullToParcel}.
     *
     * @param in The Parcel containing the written Messenger.
     *
     * @return Returns the Messenger read from the Parcel, or null if null had
     * been written.
     */
    public static IntentSender readIntentSenderOrNullFromParcel(Parcel in) {
        IBinder b = in.readStrongBinder();
        return b != null ? new IntentSender(b) : null;
    }

    
@hide
/** @hide */
    public IIntentSender getTarget() {
        return mTarget;
    }

    
@hide
/** @hide */
    public IBinder getWhitelistToken() {
        return mWhitelistToken;
    }

    
@hide
/** @hide */
    public IntentSender(IIntentSender target) {
        mTarget = target;
    }

    
@hide
/** @hide */
    public IntentSender(IIntentSender target, IBinder whitelistToken) {
        mTarget = target;
        mWhitelistToken = whitelistToken;
    }

    
@hide
/** @hide */
    public IntentSender(IBinder target) {
        mTarget = IIntentSender.Stub.asInterface(target);
    }
}