1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
// Copyright 2017 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.lib.skyframe.serialization.autocodec;
import com.google.common.base.Preconditions;
import com.squareup.javapoet.MethodSpec;
import com.squareup.javapoet.TypeName;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.PrimitiveType;
import javax.lang.model.type.TypeMirror;
/**
* Generates serialize and deserialize code fragments.
*
* <p>All methods are logically static and take the {@link ProcessingEnvironment} as a parameter.
*/
interface SerializationCodeGenerator {
class Context {
/** Builder for the method. */
public final MethodSpec.Builder builder;
/** Type of {@code name}. */
public final TypeMirror type;
/** Name of variable. */
public final String name;
/**
* Recursion depth.
*
* <p>Recursion is used to traverse generic types.
*/
public final int depth;
Context(MethodSpec.Builder builder, TypeMirror type, String name) {
this(builder, type, name, 0);
}
private Context(MethodSpec.Builder builder, TypeMirror type, String name, int depth) {
this.builder = builder;
this.type = type;
this.name = name;
this.depth = depth;
}
/** Returns a new context with a new type and name at the next recursion depth. */
Context with(TypeMirror newType, String newName) {
return new Context(builder, newType, newName, depth + 1);
}
TypeName getTypeName() {
return TypeName.get(type);
}
DeclaredType getDeclaredType() {
Preconditions.checkState(type instanceof DeclaredType, "Expected DeclaredType, was " + type);
return (DeclaredType) type;
}
boolean isDeclaredType() {
return type instanceof DeclaredType;
}
TypeMirror getTypeMirror() {
return type;
}
/** Returns true if this Context represents a type that can be null */
boolean canBeNull() {
return !(type instanceof PrimitiveType);
}
/**
* Returns a depth-qualified name.
*
* <p>This helps to avoid name collisions when recursion reuses symbol names.
*/
String makeName(String name) {
return name + depth;
}
};
/** Appends code statements to serialize a pre-declared variable. */
void addSerializationCode(Context context);
/** Appends code statements to initialize the pre-declared variable with deserialization. */
void addDeserializationCode(Context context);
/** A {@link SerializationCodeGenerator} for a particular declared type. */
interface Marshaller extends SerializationCodeGenerator {
/** Returns true if {@code type} is handled by this. */
boolean matches(DeclaredType type);
}
/** A {@link SerializationCodeGenerator} for primitive values. */
interface PrimitiveValueSerializationCodeGenerator extends SerializationCodeGenerator {
/** Returns true if {@code type} is handled by this. */
boolean matches(PrimitiveType type);
}
}
|
