net.tjado.passwdsafe.lib.view.PasswdCursorLoader.java Source code

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Here is the source code for net.tjado.passwdsafe.lib.view.PasswdCursorLoader.java

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/*
 * Copyright () 2013 Jeff Harris <jefftharris@gmail.com>
 * All rights reserved. Use of the code is allowed under the
 * Artistic License 2.0 terms, as specified in the LICENSE file
 * distributed with this code, or available from
 * http://www.opensource.org/licenses/artistic-license-2.0.php
 */
package net.tjado.passwdsafe.lib.view;

import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.os.OperationCanceledException;

import net.tjado.passwdsafe.lib.PasswdSafeUtil;

/**
 * A CursorLoader that handles background errors
 */
public class PasswdCursorLoader extends CursorLoader {
    private final Activity itsActivity;
    private Exception itsLoadException;

    /** Constructor */
    public PasswdCursorLoader(Activity activity, Uri uri, String[] projection, String selection,
            @SuppressWarnings("SameParameterValue") String[] selectionArgs, String sortOrder) {
        super(activity, uri, projection, selection, selectionArgs, sortOrder);
        itsActivity = activity;
    }

    /** Load the cursor in the background */
    @Override
    public Cursor loadInBackground() {
        if (getUri() == null) {
            return null;
        }
        try {
            return super.loadInBackground();
        } catch (Exception e) {
            // Rethrow canceled exceptions (API 16+)
            if ((e instanceof OperationCanceledException)
                    || "OperationCanceledException".equals(e.getClass().getSimpleName())) {
                throw e;
            }
            itsLoadException = e;
            return null;
        }
    }

    /** Check the result of the load and show an error if needed */
    public static boolean checkResult(Loader<Cursor> loader) {
        if (loader instanceof PasswdCursorLoader) {
            PasswdCursorLoader pwloader = (PasswdCursorLoader) loader;
            if (pwloader.itsLoadException != null) {
                Exception e = pwloader.itsLoadException;
                pwloader.itsLoadException = null;
                PasswdSafeUtil.showFatalMsg(e, pwloader.itsActivity);
                return false;
            }
        }
        return true;
    }
}