/*
 * Copyright (C) 2010 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.database.ContentObserver;
import android.os.Handler;
import android.util.DebugUtils;

import java.io.FileDescriptor;
import java.io.PrintWriter;

A class that performs asynchronous loading of data. While Loaders are active they should monitor the source of their data and deliver new results when the contents change. See LoaderManager for more detail. 
Note on threading: Clients of loaders should as a rule perform any calls on to a Loader from the main thread of their process (that is, the thread the Activity callbacks and other things occur on). Subclasses of Loader (such as AsyncTaskLoader) will often perform their work in a separate thread, but when delivering their results this too should be done on the main thread.
Subclasses generally must implement at least onStartLoading(), onStopLoading(), onForceLoad(), and onReset().
Most implementations should not derive directly from this class, but instead inherit from AsyncTaskLoader.

Developer Guides
For more information about using loaders, read the
Loaders developer guide.

Type parameters:
<D> – The result returned when the load is complete
Deprecated:
Use the Support Library Loader/**
 * A class that performs asynchronous loading of data. While Loaders are active
 * they should monitor the source of their data and deliver new results when the contents
 * change.  See {@link android.app.LoaderManager} for more detail.
 *
 * <p><b>Note on threading:</b> Clients of loaders should as a rule perform
 * any calls on to a Loader from the main thread of their process (that is,
 * the thread the Activity callbacks and other things occur on).  Subclasses
 * of Loader (such as {@link AsyncTaskLoader}) will often perform their work
 * in a separate thread, but when delivering their results this too should
 * be done on the main thread.</p>
 *
 * <p>Subclasses generally must implement at least {@link #onStartLoading()},
 * {@link #onStopLoading()}, {@link #onForceLoad()}, and {@link #onReset()}.</p>
 *
 * <p>Most implementations should not derive directly from this class, but
 * instead inherit from {@link AsyncTaskLoader}.</p>
 *
 * <div class="special reference">
 * <h3>Developer Guides</h3>
 * <p>For more information about using loaders, read the
 * <a href="{@docRoot}guide/components/loaders.html">Loaders</a> developer guide.</p>
 * </div>
 *
 * @param <D> The result returned when the load is complete
 *
 * @deprecated Use the <a href="{@docRoot}tools/extras/support-library.html">Support Library</a>
 *      {@link android.support.v4.content.Loader}
 */
@Deprecated
public class Loader<D> {
    int mId;
    OnLoadCompleteListener<D> mListener;
    OnLoadCanceledListener<D> mOnLoadCanceledListener;
    Context mContext;
    boolean mStarted = false;
    boolean mAbandoned = false;
    boolean mReset = true;
    boolean mContentChanged = false;
    boolean mProcessingChange = false;

    
An implementation of a ContentObserver that takes care of connecting it to the Loader to have the loader re-load its data when the observer is told it has changed. You do not normally need to use this yourself; it is used for you by CursorLoader to take care of executing an update when the cursor's backing data changes. 
Deprecated:
Use ForceLoadContentObserver/**
     * An implementation of a ContentObserver that takes care of connecting
     * it to the Loader to have the loader re-load its data when the observer
     * is told it has changed.  You do not normally need to use this yourself;
     * it is used for you by {@link CursorLoader} to take care of executing
     * an update when the cursor's backing data changes.
     *
     * @deprecated Use {@link android.support.v4.content.Loader.ForceLoadContentObserver}
     */
    @Deprecated
    public final class ForceLoadContentObserver extends ContentObserver {
        public ForceLoadContentObserver() {
            super(new Handler());
        }

        @Override
        public boolean deliverSelfNotifications() {
            return true;
        }

        @Override
        public void onChange(boolean selfChange) {
            onContentChanged();
        }
    }

    
Interface that is implemented to discover when a Loader has finished loading its data. You do not normally need to implement this yourself; it is used in the implementation of LoaderManager to find out when a Loader it is managing has completed so that this can be reported to its client. This interface should only be used if a Loader is not being used in conjunction with LoaderManager. 
Deprecated:
Use OnLoadCompleteListener/**
     * Interface that is implemented to discover when a Loader has finished
     * loading its data.  You do not normally need to implement this yourself;
     * it is used in the implementation of {@link android.app.LoaderManager}
     * to find out when a Loader it is managing has completed so that this can
     * be reported to its client.  This interface should only be used if a
     * Loader is not being used in conjunction with LoaderManager.
     *
     * @deprecated Use {@link android.support.v4.content.Loader.OnLoadCompleteListener}
     */
    @Deprecated
    public interface OnLoadCompleteListener<D> {
        
Called on the thread that created the Loader when the load is complete.
Params:
loader – the loader that completed the load
data – the result of the load/**
         * Called on the thread that created the Loader when the load is complete.
         *
         * @param loader the loader that completed the load
         * @param data the result of the load
         */
        public void onLoadComplete(Loader<D> loader, D data);
    }

    
Interface that is implemented to discover when a Loader has been canceled before it finished loading its data. You do not normally need to implement this yourself; it is used in the implementation of LoaderManager to find out when a Loader it is managing has been canceled so that it can schedule the next Loader. This interface should only be used if a Loader is not being used in conjunction with LoaderManager. 
Deprecated:
Use OnLoadCanceledListener/**
     * Interface that is implemented to discover when a Loader has been canceled
     * before it finished loading its data.  You do not normally need to implement
     * this yourself; it is used in the implementation of {@link android.app.LoaderManager}
     * to find out when a Loader it is managing has been canceled so that it
     * can schedule the next Loader.  This interface should only be used if a
     * Loader is not being used in conjunction with LoaderManager.
     *
     * @deprecated Use {@link android.support.v4.content.Loader.OnLoadCanceledListener}
     */
    @Deprecated
    public interface OnLoadCanceledListener<D> {
        
Called on the thread that created the Loader when the load is canceled.
Params:
loader – the loader that canceled the load/**
         * Called on the thread that created the Loader when the load is canceled.
         *
         * @param loader the loader that canceled the load
         */
        public void onLoadCanceled(Loader<D> loader);
    }

    
Stores away the application context associated with context. Since Loaders can be used across multiple activities it's dangerous to store the context directly; always use getContext() to retrieve the Loader's Context, don't use the constructor argument directly. The Context returned by getContext is safe to use across Activity instances. 
Params:
context – used to retrieve the application context./**
     * Stores away the application context associated with context.
     * Since Loaders can be used across multiple activities it's dangerous to
     * store the context directly; always use {@link #getContext()} to retrieve
     * the Loader's Context, don't use the constructor argument directly.
     * The Context returned by {@link #getContext} is safe to use across
     * Activity instances.
     *
     * @param context used to retrieve the application context.
     */
    public Loader(Context context) {
        mContext = context.getApplicationContext();
    }

    
Sends the result of the load to the registered listener. Should only be called by subclasses.
Must be called from the process's main thread.
Params:
data – the result of the load/**
     * Sends the result of the load to the registered listener. Should only be called by subclasses.
     *
     * Must be called from the process's main thread.
     *
     * @param data the result of the load
     */
    public void deliverResult(D data) {
        if (mListener != null) {
            mListener.onLoadComplete(this, data);
        }
    }

    
Informs the registered OnLoadCanceledListener that the load has been canceled. Should only be called by subclasses. Must be called from the process's main thread. /**
     * Informs the registered {@link OnLoadCanceledListener} that the load has been canceled.
     * Should only be called by subclasses.
     *
     * Must be called from the process's main thread.
     */
    public void deliverCancellation() {
        if (mOnLoadCanceledListener != null) {
            mOnLoadCanceledListener.onLoadCanceled(this);
        }
    }

    
Returns:
an application context retrieved from the Context passed to the constructor./**
     * @return an application context retrieved from the Context passed to the constructor.
     */
    public Context getContext() {
        return mContext;
    }

    
Returns:
the ID of this loader/**
     * @return the ID of this loader
     */
    public int getId() {
        return mId;
    }

    
Registers a class that will receive callbacks when a load is complete.
The callback will be called on the process's main thread so it's safe to
pass the results to widgets.
Must be called from the process's main thread.
/**
     * Registers a class that will receive callbacks when a load is complete.
     * The callback will be called on the process's main thread so it's safe to
     * pass the results to widgets.
     *
     * <p>Must be called from the process's main thread.
     */
    public void registerListener(int id, OnLoadCompleteListener<D> listener) {
        if (mListener != null) {
            throw new IllegalStateException("There is already a listener registered");
        }
        mListener = listener;
        mId = id;
    }

    
Remove a listener that was previously added with registerListener. Must be called from the process's main thread. /**
     * Remove a listener that was previously added with {@link #registerListener}.
     *
     * Must be called from the process's main thread.
     */
    public void unregisterListener(OnLoadCompleteListener<D> listener) {
        if (mListener == null) {
            throw new IllegalStateException("No listener register");
        }
        if (mListener != listener) {
            throw new IllegalArgumentException("Attempting to unregister the wrong listener");
        }
        mListener = null;
    }

    
Registers a listener that will receive callbacks when a load is canceled.
The callback will be called on the process's main thread so it's safe to
pass the results to widgets.
Must be called from the process's main thread.
Params:
listener – The listener to register./**
     * Registers a listener that will receive callbacks when a load is canceled.
     * The callback will be called on the process's main thread so it's safe to
     * pass the results to widgets.
     *
     * Must be called from the process's main thread.
     *
     * @param listener The listener to register.
     */
    public void registerOnLoadCanceledListener(OnLoadCanceledListener<D> listener) {
        if (mOnLoadCanceledListener != null) {
            throw new IllegalStateException("There is already a listener registered");
        }
        mOnLoadCanceledListener = listener;
    }

    
Unregisters a listener that was previously added with registerOnLoadCanceledListener. Must be called from the process's main thread. 
Params:
listener – The listener to unregister./**
     * Unregisters a listener that was previously added with
     * {@link #registerOnLoadCanceledListener}.
     *
     * Must be called from the process's main thread.
     *
     * @param listener The listener to unregister.
     */
    public void unregisterOnLoadCanceledListener(OnLoadCanceledListener<D> listener) {
        if (mOnLoadCanceledListener == null) {
            throw new IllegalStateException("No listener register");
        }
        if (mOnLoadCanceledListener != listener) {
            throw new IllegalArgumentException("Attempting to unregister the wrong listener");
        }
        mOnLoadCanceledListener = null;
    }

    
Return whether this load has been started. That is, its startLoading() has been called and no calls to stopLoading() or reset() have yet been made. /**
     * Return whether this load has been started.  That is, its {@link #startLoading()}
     * has been called and no calls to {@link #stopLoading()} or
     * {@link #reset()} have yet been made.
     */
    public boolean isStarted() {
        return mStarted;
    }

    
Return whether this loader has been abandoned.  In this state, the
loader must not report any new data, and must keep
its last reported data valid until it is finally reset.
/**
     * Return whether this loader has been abandoned.  In this state, the
     * loader <em>must not</em> report any new data, and <em>must</em> keep
     * its last reported data valid until it is finally reset.
     */
    public boolean isAbandoned() {
        return mAbandoned;
    }

    
Return whether this load has been reset. That is, either the loader has not yet been started for the first time, or its reset() has been called. /**
     * Return whether this load has been reset.  That is, either the loader
     * has not yet been started for the first time, or its {@link #reset()}
     * has been called.
     */
    public boolean isReset() {
        return mReset;
    }

    
This function will normally be called for you automatically by LoaderManager when the associated fragment/activity is being started. When using a Loader with LoaderManager, you must not call this method yourself, or you will conflict with its management of the Loader. Starts an asynchronous load of the Loader's data. When the result is ready the callbacks will be called on the process's main thread. If a previous load has been completed and is still valid the result may be passed to the callbacks immediately. The loader will monitor the source of the data set and may deliver future callbacks if the source changes. Calling stopLoading will stop the delivery of callbacks. 
This updates the Loader's internal state so that isStarted() and isReset() will return the correct values, and then calls the implementation's onStartLoading(). 
Must be called from the process's main thread.
/**
     * This function will normally be called for you automatically by
     * {@link android.app.LoaderManager} when the associated fragment/activity
     * is being started.  When using a Loader with {@link android.app.LoaderManager},
     * you <em>must not</em> call this method yourself, or you will conflict
     * with its management of the Loader.
     *
     * Starts an asynchronous load of the Loader's data. When the result
     * is ready the callbacks will be called on the process's main thread.
     * If a previous load has been completed and is still valid
     * the result may be passed to the callbacks immediately.
     * The loader will monitor the source of
     * the data set and may deliver future callbacks if the source changes.
     * Calling {@link #stopLoading} will stop the delivery of callbacks.
     *
     * <p>This updates the Loader's internal state so that
     * {@link #isStarted()} and {@link #isReset()} will return the correct
     * values, and then calls the implementation's {@link #onStartLoading()}.
     *
     * <p>Must be called from the process's main thread.
     */
    public final void startLoading() {
        mStarted = true;
        mReset = false;
        mAbandoned = false;
        onStartLoading();
    }

    
Subclasses must implement this to take care of loading their data, as per startLoading(). This is not called by clients directly, but as a result of a call to startLoading(). /**
     * Subclasses must implement this to take care of loading their data,
     * as per {@link #startLoading()}.  This is not called by clients directly,
     * but as a result of a call to {@link #startLoading()}.
     */
    protected void onStartLoading() {
    }

    
Attempt to cancel the current load task.
Must be called on the main thread of the process.
Cancellation is not an immediate operation, since the load is performed
in a background thread.  If there is currently a load in progress, this
method requests that the load be canceled, and notes this is the case;
once the background thread has completed its work its remaining state
will be cleared.  If another load request comes in during this time,
it will be held until the canceled load is complete.
Returns:
Returns false if the task could not be canceled, typically because it has already completed normally, or because startLoading() hasn't been called; returns true otherwise.  When true is returned, the task is still running and the OnLoadCanceledListener will be called when the task completes./**
     * Attempt to cancel the current load task.
     * Must be called on the main thread of the process.
     *
     * <p>Cancellation is not an immediate operation, since the load is performed
     * in a background thread.  If there is currently a load in progress, this
     * method requests that the load be canceled, and notes this is the case;
     * once the background thread has completed its work its remaining state
     * will be cleared.  If another load request comes in during this time,
     * it will be held until the canceled load is complete.
     *
     * @return Returns <tt>false</tt> if the task could not be canceled,
     * typically because it has already completed normally, or
     * because {@link #startLoading()} hasn't been called; returns
     * <tt>true</tt> otherwise.  When <tt>true</tt> is returned, the task
     * is still running and the {@link OnLoadCanceledListener} will be called
     * when the task completes.
     */
    public boolean cancelLoad() {
        return onCancelLoad();
    }

    
Subclasses must implement this to take care of requests to cancelLoad(). This will always be called from the process's main thread. 
Returns:
Returns false if the task could not be canceled, typically because it has already completed normally, or because startLoading() hasn't been called; returns true otherwise.  When true is returned, the task is still running and the OnLoadCanceledListener will be called when the task completes./**
     * Subclasses must implement this to take care of requests to {@link #cancelLoad()}.
     * This will always be called from the process's main thread.
     *
     * @return Returns <tt>false</tt> if the task could not be canceled,
     * typically because it has already completed normally, or
     * because {@link #startLoading()} hasn't been called; returns
     * <tt>true</tt> otherwise.  When <tt>true</tt> is returned, the task
     * is still running and the {@link OnLoadCanceledListener} will be called
     * when the task completes.
     */
    protected boolean onCancelLoad() {
        return false;
    }

    
Force an asynchronous load. Unlike startLoading() this will ignore a previously loaded data set and load a new one. This simply calls through to the implementation's onForceLoad(). You generally should only call this when the loader is started -- that is, isStarted() returns true. 
Must be called from the process's main thread.
/**
     * Force an asynchronous load. Unlike {@link #startLoading()} this will ignore a previously
     * loaded data set and load a new one.  This simply calls through to the
     * implementation's {@link #onForceLoad()}.  You generally should only call this
     * when the loader is started -- that is, {@link #isStarted()} returns true.
     *
     * <p>Must be called from the process's main thread.
     */
    public void forceLoad() {
        onForceLoad();
    }

    
Subclasses must implement this to take care of requests to forceLoad(). This will always be called from the process's main thread. /**
     * Subclasses must implement this to take care of requests to {@link #forceLoad()}.
     * This will always be called from the process's main thread.
     */
    protected void onForceLoad() {
    }

    
This function will normally be called for you automatically by LoaderManager when the associated fragment/activity is being stopped. When using a Loader with LoaderManager, you must not call this method yourself, or you will conflict
with its management of the Loader.
Stops delivery of updates until the next time startLoading() is called. Implementations should not invalidate their data at this point -- clients are still free to use the last data the loader reported. They will, however, typically stop reporting new data if the data changes; they can still monitor for changes, but must not report them to the client until and if startLoading() is later called. 
This updates the Loader's internal state so that isStarted() will return the correct value, and then calls the implementation's onStopLoading(). 
Must be called from the process's main thread.
/**
     * This function will normally be called for you automatically by
     * {@link android.app.LoaderManager} when the associated fragment/activity
     * is being stopped.  When using a Loader with {@link android.app.LoaderManager},
     * you <em>must not</em> call this method yourself, or you will conflict
     * with its management of the Loader.
     *
     * <p>Stops delivery of updates until the next time {@link #startLoading()} is called.
     * Implementations should <em>not</em> invalidate their data at this point --
     * clients are still free to use the last data the loader reported.  They will,
     * however, typically stop reporting new data if the data changes; they can
     * still monitor for changes, but must not report them to the client until and
     * if {@link #startLoading()} is later called.
     *
     * <p>This updates the Loader's internal state so that
     * {@link #isStarted()} will return the correct
     * value, and then calls the implementation's {@link #onStopLoading()}.
     *
     * <p>Must be called from the process's main thread.
     */
    public void stopLoading() {
        mStarted = false;
        onStopLoading();
    }

    
Subclasses must implement this to take care of stopping their loader, as per stopLoading(). This is not called by clients directly, but as a result of a call to stopLoading(). This will always be called from the process's main thread. /**
     * Subclasses must implement this to take care of stopping their loader,
     * as per {@link #stopLoading()}.  This is not called by clients directly,
     * but as a result of a call to {@link #stopLoading()}.
     * This will always be called from the process's main thread.
     */
    protected void onStopLoading() {
    }

    
This function will normally be called for you automatically by LoaderManager when restarting a Loader. When using a Loader with LoaderManager, you must not call this method yourself, or you will conflict with its management of the Loader. Tell the Loader that it is being abandoned. This is called prior to reset to have it retain its current data but not report any new data. /**
     * This function will normally be called for you automatically by
     * {@link android.app.LoaderManager} when restarting a Loader.  When using
     * a Loader with {@link android.app.LoaderManager},
     * you <em>must not</em> call this method yourself, or you will conflict
     * with its management of the Loader.
     *
     * Tell the Loader that it is being abandoned.  This is called prior
     * to {@link #reset} to have it retain its current data but not report
     * any new data.
     */
    public void abandon() {
        mAbandoned = true;
        onAbandon();
    }
    
    
Subclasses implement this to take care of being abandoned. This is an optional intermediate state prior to onReset() -- it means that the client is no longer interested in any new data from the loader, so the loader must not report any further updates. However, the loader must keep its last reported data valid until the final onReset() happens. You can retrieve the current abandoned state with isAbandoned. /**
     * Subclasses implement this to take care of being abandoned.  This is
     * an optional intermediate state prior to {@link #onReset()} -- it means that
     * the client is no longer interested in any new data from the loader,
     * so the loader must not report any further updates.  However, the
     * loader <em>must</em> keep its last reported data valid until the final
     * {@link #onReset()} happens.  You can retrieve the current abandoned
     * state with {@link #isAbandoned}.
     */
    protected void onAbandon() {
    }
    
    
This function will normally be called for you automatically by LoaderManager when destroying a Loader. When using a Loader with LoaderManager, you must not call this method yourself, or you will conflict with its management of the Loader. Resets the state of the Loader. The Loader should at this point free all of its resources, since it may never be called again; however, its startLoading() may later be called at which point it must be able to start running again. 
This updates the Loader's internal state so that isStarted() and isReset() will return the correct values, and then calls the implementation's onReset(). 
Must be called from the process's main thread.
/**
     * This function will normally be called for you automatically by
     * {@link android.app.LoaderManager} when destroying a Loader.  When using
     * a Loader with {@link android.app.LoaderManager},
     * you <em>must not</em> call this method yourself, or you will conflict
     * with its management of the Loader.
     *
     * Resets the state of the Loader.  The Loader should at this point free
     * all of its resources, since it may never be called again; however, its
     * {@link #startLoading()} may later be called at which point it must be
     * able to start running again.
     *
     * <p>This updates the Loader's internal state so that
     * {@link #isStarted()} and {@link #isReset()} will return the correct
     * values, and then calls the implementation's {@link #onReset()}.
     *
     * <p>Must be called from the process's main thread.
     */
    public void reset() {
        onReset();
        mReset = true;
        mStarted = false;
        mAbandoned = false;
        mContentChanged = false;
        mProcessingChange = false;
    }

    
Subclasses must implement this to take care of resetting their loader, as per reset(). This is not called by clients directly, but as a result of a call to reset(). This will always be called from the process's main thread. /**
     * Subclasses must implement this to take care of resetting their loader,
     * as per {@link #reset()}.  This is not called by clients directly,
     * but as a result of a call to {@link #reset()}.
     * This will always be called from the process's main thread.
     */
    protected void onReset() {
    }

    
Take the current flag indicating whether the loader's content had
changed while it was stopped.  If it had, true is returned and the
flag is cleared.
/**
     * Take the current flag indicating whether the loader's content had
     * changed while it was stopped.  If it had, true is returned and the
     * flag is cleared.
     */
    public boolean takeContentChanged() {
        boolean res = mContentChanged;
        mContentChanged = false;
        mProcessingChange |= res;
        return res;
    }

    
Commit that you have actually fully processed a content change that was returned by takeContentChanged. This is for use with rollbackContentChanged() to handle situations where a load is cancelled. Call this when you have completely processed a load without it being cancelled. /**
     * Commit that you have actually fully processed a content change that
     * was returned by {@link #takeContentChanged}.  This is for use with
     * {@link #rollbackContentChanged()} to handle situations where a load
     * is cancelled.  Call this when you have completely processed a load
     * without it being cancelled.
     */
    public void commitContentChanged() {
        mProcessingChange = false;
    }

    
Report that you have abandoned the processing of a content change that was returned by takeContentChanged() and would like to rollback to the state where there is again a pending content change. This is to handle the case where a data load due to a content change has been canceled before its data was delivered back to the loader. /**
     * Report that you have abandoned the processing of a content change that
     * was returned by {@link #takeContentChanged()} and would like to rollback
     * to the state where there is again a pending content change.  This is
     * to handle the case where a data load due to a content change has been
     * canceled before its data was delivered back to the loader.
     */
    public void rollbackContentChanged() {
        if (mProcessingChange) {
            onContentChanged();
        }
    }

    
Called when ForceLoadContentObserver detects a change. The default implementation checks to see if the loader is currently started; if so, it simply calls forceLoad(); otherwise, it sets a flag so that takeContentChanged() returns true. 
Must be called from the process's main thread.
/**
     * Called when {@link ForceLoadContentObserver} detects a change.  The
     * default implementation checks to see if the loader is currently started;
     * if so, it simply calls {@link #forceLoad()}; otherwise, it sets a flag
     * so that {@link #takeContentChanged()} returns true.
     *
     * <p>Must be called from the process's main thread.
     */
    public void onContentChanged() {
        if (mStarted) {
            forceLoad();
        } else {
            // This loader has been stopped, so we don't want to load
            // new data right now...  but keep track of it changing to
            // refresh later if we start again.
            mContentChanged = true;
        }
    }

    
For debugging, converts an instance of the Loader's data class to
a string that can be printed.  Must handle a null data.
/**
     * For debugging, converts an instance of the Loader's data class to
     * a string that can be printed.  Must handle a null data.
     */
    public String dataToString(D data) {
        StringBuilder sb = new StringBuilder(64);
        DebugUtils.buildShortClassTag(data, sb);
        sb.append("}");
        return sb.toString();
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder(64);
        DebugUtils.buildShortClassTag(this, sb);
        sb.append(" id=");
        sb.append(mId);
        sb.append("}");
        return sb.toString();
    }

    
Print the Loader's state into the given stream.
Params:
prefix – Text to print at the front of each line.
fd – The raw file descriptor that the dump is being sent to.
writer – A PrintWriter to which the dump is to be set.
args – Additional arguments to the dump request./**
     * Print the Loader's state into the given stream.
     *
     * @param prefix Text to print at the front of each line.
     * @param fd The raw file descriptor that the dump is being sent to.
     * @param writer A PrintWriter to which the dump is to be set.
     * @param args Additional arguments to the dump request.
     */
    public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
        writer.print(prefix); writer.print("mId="); writer.print(mId);
                writer.print(" mListener="); writer.println(mListener);
        if (mStarted || mContentChanged || mProcessingChange) {
            writer.print(prefix); writer.print("mStarted="); writer.print(mStarted);
                    writer.print(" mContentChanged="); writer.print(mContentChanged);
                    writer.print(" mProcessingChange="); writer.println(mProcessingChange);
        }
        if (mAbandoned || mReset) {
            writer.print(prefix); writer.print("mAbandoned="); writer.print(mAbandoned);
                    writer.print(" mReset="); writer.println(mReset);
        }
    }
}