BuiltInVariableExpr.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.reflection.ModelAnalyzer;
20import android.databinding.tool.reflection.ModelClass;
21import android.databinding.tool.writer.KCode;
22
23import java.util.ArrayList;
24import java.util.List;
25
26public class BuiltInVariableExpr extends IdentifierExpr {
27    private final String mAccessCode;
28
29    BuiltInVariableExpr(String name, String type, String accessCode) {
30        super(name);
31        super.setUserDefinedType(type);
32        this.mAccessCode = accessCode;
33    }
34
35    @Override
36    public boolean isDynamic() {
37        return false;
38    }
39
40    @Override
41    protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) {
42        ModelClass modelClass = super.resolveType(modelAnalyzer);
43        return modelClass;
44    }
45
46    @Override
47    protected List<Dependency> constructDependencies() {
48        return new ArrayList<Dependency>();
49    }
50
51    @Override
52    protected KCode generateCode(boolean expand) {
53        if (mAccessCode == null) {
54            return new KCode().app(mName);
55        } else {
56            return new KCode().app(mAccessCode);
57        }
58    }
59
60    public boolean isDeclared() {
61        return false;
62    }
63
64    @Override
65    public String getInvertibleError() {
66        return "Built-in variables may not be the target of two-way binding";
67    }
68}
69