CompatUtils.java revision 24119dfd414f948b2da214c021cc76e06b3dd41c 
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
17package com.android.inputmethod.compat;
18
19import android.content.Intent;
20import android.text.TextUtils;
21import android.util.Log;
22
23import java.lang.reflect.Field;
24import java.lang.reflect.InvocationTargetException;
25import java.lang.reflect.Method;
26import java.util.ArrayList;
27import java.util.List;
28
29public class CompatUtils {
30    private static final String TAG = CompatUtils.class.getSimpleName();
31    private static final String EXTRA_INPUT_METHOD_ID = "input_method_id";
32    // TODO: Can these be constants instead of literal String constants?
33    private static final String INPUT_METHOD_SUBTYPE_SETTINGS =
34            "android.settings.INPUT_METHOD_SUBTYPE_SETTINGS";
35    private static final String INPUT_LANGUAGE_SELECTION =
36            "com.android.inputmethod.latin.INPUT_LANGUAGE_SELECTION";
37
38    public static Intent getInputLanguageSelectionIntent(String inputMethodId,
39            int flagsForSubtypeSettings) {
40        final String action;
41        Intent intent;
42        if (android.os.Build.VERSION.SDK_INT
43                >= /* android.os.Build.VERSION_CODES.HONEYCOMB */ 11) {
44            // Refer to android.provider.Settings.ACTION_INPUT_METHOD_SUBTYPE_SETTINGS
45            action = INPUT_METHOD_SUBTYPE_SETTINGS;
46            intent = new Intent(action);
47            if (!TextUtils.isEmpty(inputMethodId)) {
48                intent.putExtra(EXTRA_INPUT_METHOD_ID, inputMethodId);
49            }
50            if (flagsForSubtypeSettings > 0) {
51                intent.setFlags(flagsForSubtypeSettings);
52            }
53        } else {
54            action = INPUT_LANGUAGE_SELECTION;
55            intent = new Intent(action);
56        }
57        return intent;
58    }
59
60    public static Class<?> getClass(String className) {
61        try {
62            return Class.forName(className);
63        } catch (ClassNotFoundException e) {
64            return null;
65        }
66    }
67
68    public static Method getMethod(Class<?> targetClass, String name,
69            Class<?>... parameterTypes) {
70        try {
71            return targetClass.getMethod(name, parameterTypes);
72        } catch (SecurityException e) {
73            // ignore
74            return null;
75        } catch (NoSuchMethodException e) {
76            // ignore
77            return null;
78        }
79    }
80
81    public static Field getField(Class<?> targetClass, String name) {
82        try {
83            return targetClass.getField(name);
84        } catch (SecurityException e) {
85            // ignore
86            return null;
87        } catch (NoSuchFieldException e) {
88            // ignore
89            return null;
90        }
91    }
92
93    public static Object invoke(
94            Object receiver, Object defaultValue, Method method, Object... args) {
95        if (receiver == null || method == null) return defaultValue;
96        try {
97            return method.invoke(receiver, args);
98        } catch (IllegalArgumentException e) {
99            Log.e(TAG, "Exception in invoke: IllegalArgmentException");
100            return defaultValue;
101        } catch (IllegalAccessException e) {
102            Log.e(TAG, "Exception in invoke: IllegalAccessException");
103            return defaultValue;
104        } catch (InvocationTargetException e) {
105            Log.e(TAG, "Exception in invoke: IllegalTargetException");
106            return defaultValue;
107        }
108    }
109
110    public static Object getFieldValue(Object receiver, Object defaultValue, Field field) {
111        if (receiver == null || field == null) return defaultValue;
112        try {
113            return field.get(receiver);
114        } catch (IllegalArgumentException e) {
115            return defaultValue;
116        } catch (IllegalAccessException e) {
117            return defaultValue;
118        }
119    }
120
121    public static void setFieldValue(Object receiver, Field field, Object value) {
122        if (receiver == null || field == null) return;
123        try {
124            field.set(receiver, value);
125        } catch (IllegalArgumentException e) {
126            // ignore
127        } catch (IllegalAccessException e) {
128            // ignore
129        }
130    }
131
132    public static List<InputMethodSubtypeCompatWrapper> copyInputMethodSubtypeListToWrapper(
133            Object listObject) {
134        if (!(listObject instanceof List<?>)) return null;
135        final List<InputMethodSubtypeCompatWrapper> subtypes =
136                new ArrayList<InputMethodSubtypeCompatWrapper>();
137        for (Object o: (List<?>)listObject) {
138            subtypes.add(new InputMethodSubtypeCompatWrapper(o));
139        }
140        return subtypes;
141    }
142}
143