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.List;
24
25public class UnaryExpr extends Expr {
26    final String mOp;
27    UnaryExpr(String op, Expr expr) {
28        super(expr);
29        mOp = op;
30    }
31
32    @Override
33    public String getInvertibleError() {
34        return getExpr().getInvertibleError();
35    }
36
37    @Override
38    protected String computeUniqueKey() {
39        return join(getOpStr(), getExpr().getUniqueKey());
40    }
41
42    @Override
43    public Expr generateInverse(ExprModel model, Expr value, String bindingClassName) {
44        return model.unary(mOp, getExpr().generateInverse(model, value, bindingClassName));
45    }
46
47    @Override
48    public Expr cloneToModel(ExprModel model) {
49        return model.unary(mOp, getExpr().cloneToModel(model));
50    }
51
52    @Override
53    protected KCode generateCode() {
54        return new KCode().app(getOp(), getExpr().toCode());
55    }
56
57    @Override
58    protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) {
59        return getExpr().getResolvedType();
60    }
61
62    @Override
63    protected List<Dependency> constructDependencies() {
64        return constructDynamicChildrenDependencies();
65    }
66
67    private String getOpStr() {
68        switch (mOp.charAt(0)) {
69            case '~' : return "bitNot";
70            case '!' : return "logicalNot";
71            case '-' : return "unaryMinus";
72            case '+' : return "unaryPlus";
73        }
74        return mOp;
75    }
76
77    public String getOp() {
78        return mOp;
79    }
80
81    public Expr getExpr() {
82        return getChildren().get(0);
83    }
84
85    @Override
86    public String toString() {
87        return mOp + getExpr();
88    }
89}
90