Passing additional information into a Cursor

gistfile1.java

package com.cyrilmottier.android.avelov.database;

import android.database.Cursor;
import android.database.CursorWrapper;
import android.os.Bundle;

/**
 * A Cursor that completely re-writes the actual Cursor capabilities related to extras. It allows clients to use the setExtras(Bundle) (this
 * method is actually hidden in the Android framework).
 *
 * @author Cyril Mottier
 */
public class MetaCursor extends CursorWrapper {

    private Bundle mExtras = Bundle.EMPTY;

    public MetaCursor(Cursor cursor) {
        super(cursor);
    }

    /**
     * Sets a {@link android.os.Bundle} that will be returned by {@link #getExtras()}. <code>null</code> will be converted into {@link
     * android.os.Bundle#EMPTY}.
     *
     * @param extras {@link android.os.Bundle} to set.
     */
    public void setExtras(Bundle extras) {
        mExtras = extras == null ? Bundle.EMPTY : extras;
    }

    @Override
    public Bundle getExtras() {
        return mExtras;
    }

}