MethodCallExpr.java revision fead9ca09b117136b35bc5bf137340a754f9eddd 
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 com.google.common.collect.Iterables;
20
21import android.databinding.tool.reflection.Callable;
22import android.databinding.tool.reflection.Callable.Type;
23import android.databinding.tool.reflection.ModelAnalyzer;
24import android.databinding.tool.reflection.ModelClass;
25import android.databinding.tool.reflection.ModelMethod;
26import android.databinding.tool.util.L;
27
28import java.util.ArrayList;
29import java.util.Arrays;
30import java.util.List;
31
32public class MethodCallExpr extends Expr {
33    final String mName;
34
35    Callable mGetter;
36
37    MethodCallExpr(Expr target, String name, List<Expr> args) {
38        super(Iterables.concat(Arrays.asList(target), args));
39        mName = name;
40    }
41
42    @Override
43    public void updateExpr(ModelAnalyzer modelAnalyzer) {
44        resolveType(modelAnalyzer);
45        super.updateExpr(modelAnalyzer);
46    }
47
48    @Override
49    protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) {
50        if (mGetter == null) {
51            List<ModelClass> args = new ArrayList<ModelClass>();
52            for (Expr expr : getArgs()) {
53                args.add(expr.getResolvedType());
54            }
55
56            Expr target = getTarget();
57            boolean isStatic = target instanceof StaticIdentifierExpr;
58            ModelMethod method = target.getResolvedType().getMethod(mName, args, isStatic);
59            if (method == null) {
60                String message = "cannot find method '" + mName + "' in class " +
61                        target.getResolvedType().toJavaCode();
62                IllegalArgumentException e = new IllegalArgumentException(message);
63                L.e(e, "cannot find method %s in class %s", mName,
64                        target.getResolvedType().toJavaCode());
65                throw e;
66            }
67            mGetter = new Callable(Type.METHOD, method.getName(), method.getReturnType(args), true,
68                    false);
69        }
70        return mGetter.resolvedType;
71    }
72
73    @Override
74    protected List<Dependency> constructDependencies() {
75        final List<Dependency> dependencies = constructDynamicChildrenDependencies();
76        for (Dependency dependency : dependencies) {
77            if (dependency.getOther() == getTarget()) {
78                dependency.setMandatory(true);
79            }
80        }
81        return dependencies;
82    }
83
84    @Override
85    protected String computeUniqueKey() {
86        return sUniqueKeyJoiner.join(getTarget().computeUniqueKey(), mName,
87                super.computeUniqueKey());
88    }
89
90    public Expr getTarget() {
91        return getChildren().get(0);
92    }
93
94    public String getName() {
95        return mName;
96    }
97
98    public List<Expr> getArgs() {
99        return getChildren().subList(1, getChildren().size());
100    }
101
102    public Callable getGetter() {
103        return mGetter;
104    }
105}
106