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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.sdkuilib.internal.repository;
     18 
     19 import com.android.sdklib.ISdkLog;
     20 
     21 import org.eclipse.swt.widgets.Composite;
     22 
     23 import java.lang.reflect.Constructor;
     24 
     25 
     26 
     27 /**
     28  * Base class for pages shown in the updater.
     29  */
     30 public abstract class UpdaterPage extends Composite {
     31 
     32     public enum Purpose {
     33         /** A generic page with is neither of the other specific purposes. */
     34         GENERIC,
     35         /** A page that displays the about box for the SDK Manager. */
     36         ABOUT_BOX,
     37         /** A page that displays the settings for the SDK Manager. */
     38         SETTINGS
     39     }
     40 
     41     public UpdaterPage(Composite parent, int swtStyle) {
     42         super(parent, swtStyle);
     43     }
     44 
     45     /**
     46      * The title of the page. Default is null.
     47      * <p/>
     48      * Useful for SdkManager1 when it displays a list of pages using
     49      * a vertical page selector.
     50      * Default implement for SdkManager2 is to return null.
     51      */
     52     public String getPageTitle() {
     53         return null;
     54     }
     55 
     56     public static UpdaterPage newInstance(
     57             Class<? extends UpdaterPage> clazz,
     58             Composite parent,
     59             int swtStyle,
     60             ISdkLog log) {
     61 
     62         try {
     63             Constructor<? extends UpdaterPage> cons =
     64                 clazz.getConstructor(new Class<?>[] { Composite.class, int.class });
     65 
     66             return cons.newInstance(new Object[] { parent, swtStyle });
     67 
     68         } catch (NoSuchMethodException e) {
     69             // There is no such constructor.
     70             log.error(e,
     71                     "Failed to instanciate page %1$s. Constructor args must be (Composite,int).",
     72                     clazz.getSimpleName());
     73 
     74         } catch (Exception e) {
     75             // Log this instead of crashing the whole app.
     76             log.error(e,
     77                     "Failed to instanciate page %1$s.",
     78                     clazz.getSimpleName());
     79         }
     80 
     81         return null;
     82     }
     83 }
     84