ViewFieldExpr.java revision d3f2b9229472c9dae9bf4ae8b3e2d653b5653b01 
1/*
2 * Copyright (C) 2015 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 android.databinding.tool.expr;
18
19import android.databinding.tool.BindingTarget;
20import android.databinding.tool.reflection.ModelAnalyzer;
21import android.databinding.tool.reflection.ModelClass;
22import android.databinding.tool.writer.LayoutBinderWriterKt;
23
24public class ViewFieldExpr extends BuiltInVariableExpr {
25    private final BindingTarget mBindingTarget;
26
27    ViewFieldExpr(BindingTarget bindingTarget) {
28        super(LayoutBinderWriterKt.getFieldName(bindingTarget), initialType(bindingTarget),
29                LayoutBinderWriterKt.getFieldName(bindingTarget));
30        mBindingTarget = bindingTarget;
31    }
32
33    @Override
34    public String getInvertibleError() {
35        return "View fields may not be the target of two-way binding";
36    }
37
38    private static String initialType(BindingTarget bindingTarget) {
39        return bindingTarget.isBinder()
40                ? "android.databinding.ViewDataBinding"
41                : bindingTarget.getInterfaceType();
42    }
43
44    public BindingTarget getBindingTarget() {
45        return mBindingTarget;
46    }
47
48    @Override
49    protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) {
50        final ModelClass type = modelAnalyzer.findClass(mBindingTarget.getInterfaceType(), null);
51        if (type == null) {
52            return modelAnalyzer.findClass("android.databinding.ViewDataBinding", null);
53        }
54        return type;
55    }
56}
57