1 /*
2  * Copyright (C) 2014 Google, Inc.
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 package dagger.internal.codegen.writer;
17 
18 import com.google.common.base.Function;
19 import com.google.common.base.Joiner;
20 import com.google.common.collect.FluentIterable;
21 import com.google.common.collect.ImmutableList;
22 import com.google.common.collect.Lists;
23 import java.io.IOException;
24 import java.util.Iterator;
25 import java.util.List;
26 import java.util.Set;
27 
28 public final class InterfaceWriter extends TypeWriter {
29   private final List<TypeVariableName> typeVariables;
InterfaceWriter(ClassName name)30   InterfaceWriter(ClassName name) {
31     super(name);
32     this.typeVariables = Lists.newArrayList();
33   }
34 
addTypeVariable(TypeVariableName typeVariable)35   public void addTypeVariable(TypeVariableName typeVariable) {
36     this.typeVariables.add(typeVariable);
37   }
38 
39   @Override
write(Appendable appendable, Context context)40   public Appendable write(Appendable appendable, Context context) throws IOException {
41     context = context.createSubcontext(FluentIterable.from(nestedTypeWriters)
42         .transform(new Function<TypeWriter, ClassName>() {
43           @Override public ClassName apply(TypeWriter input) {
44             return input.name;
45           }
46         })
47         .toSet());
48     writeAnnotations(appendable, context);
49     writeModifiers(appendable).append("interface ").append(name.simpleName());
50     if (!typeVariables.isEmpty()) {
51       appendable.append('<');
52       Joiner.on(", ").appendTo(appendable, typeVariables);
53       appendable.append('>');
54     }
55     Iterator<TypeName> implementedTypesIterator = implementedTypes.iterator();
56     if (implementedTypesIterator.hasNext()) {
57       appendable.append(" extends ");
58       implementedTypesIterator.next().write(appendable, context);
59       while (implementedTypesIterator.hasNext()) {
60         appendable.append(", ");
61         implementedTypesIterator.next().write(appendable, context);
62       }
63     }
64     appendable.append(" {");
65     for (MethodWriter methodWriter : methodWriters) {
66       appendable.append('\n');
67       methodWriter.write(new IndentingAppendable(appendable), context);
68     }
69     for (TypeWriter nestedTypeWriter : nestedTypeWriters) {
70       appendable.append('\n');
71       nestedTypeWriter.write(new IndentingAppendable(appendable), context);
72     }
73     appendable.append("}\n");
74     return appendable;
75   }
76 
77   @Override
referencedClasses()78   public Set<ClassName> referencedClasses() {
79     return FluentIterable.from(ImmutableList.<HasClassReferences>of())
80         .append(nestedTypeWriters)
81         .append(methodWriters)
82         .append(implementedTypes)
83         .append(annotations)
84         .transformAndConcat(HasClassReferences.COMBINER)
85         .toSet();
86   }
87 }
88