1/*
2 * Copyright (C) 2016 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
17@file:Suppress("PLATFORM_CLASS_MAPPED_TO_KOTLIN")
18
19package android.arch.persistence.room.ext
20
21import com.google.auto.common.AnnotationMirrors
22import com.google.auto.common.MoreElements
23import com.google.auto.common.MoreTypes
24import javax.annotation.processing.ProcessingEnvironment
25import javax.lang.model.element.AnnotationValue
26import javax.lang.model.element.Element
27import javax.lang.model.element.ElementKind
28import javax.lang.model.element.Modifier
29import javax.lang.model.element.TypeElement
30import javax.lang.model.element.VariableElement
31import javax.lang.model.type.TypeKind
32import javax.lang.model.type.TypeMirror
33import javax.lang.model.util.SimpleAnnotationValueVisitor6
34import kotlin.reflect.KClass
35
36fun Element.hasAnyOf(vararg modifiers: Modifier): Boolean {
37    return this.modifiers.any { modifiers.contains(it) }
38}
39
40fun Element.hasAnnotation(klass: KClass<out Annotation>): Boolean {
41    return MoreElements.isAnnotationPresent(this, klass.java)
42}
43
44fun Element.isNonNull() =
45        asType().kind.isPrimitive
46                || hasAnnotation(android.support.annotation.NonNull::class)
47                || hasAnnotation(org.jetbrains.annotations.NotNull::class)
48
49/**
50 * gets all members including super privates. does not handle duplicate field names!!!
51 */
52// TODO handle conflicts with super: b/35568142
53fun TypeElement.getAllFieldsIncludingPrivateSupers(processingEnvironment: ProcessingEnvironment):
54        Set<VariableElement> {
55    val myMembers = processingEnvironment.elementUtils.getAllMembers(this)
56            .filter { it.kind == ElementKind.FIELD }
57            .filter { it is VariableElement }
58            .map { it as VariableElement }
59            .toSet()
60    if (superclass.kind != TypeKind.NONE) {
61        return myMembers + MoreTypes.asTypeElement(superclass)
62                .getAllFieldsIncludingPrivateSupers(processingEnvironment)
63    } else {
64        return myMembers
65    }
66}
67
68// code below taken from dagger2
69// compiler/src/main/java/dagger/internal/codegen/ConfigurationAnnotations.java
70private val TO_LIST_OF_TYPES = object
71    : SimpleAnnotationValueVisitor6<List<TypeMirror>, Void?>() {
72    override fun visitArray(values: MutableList<out AnnotationValue>?, p: Void?)
73            : List<TypeMirror> {
74        return values?.map {
75            val tmp = TO_TYPE.visit(it)
76            tmp
77        }?.filterNotNull() ?: emptyList()
78    }
79
80
81    override fun defaultAction(o: Any?, p: Void?): List<TypeMirror>? {
82        return emptyList()
83    }
84}
85
86private val TO_TYPE = object : SimpleAnnotationValueVisitor6<TypeMirror, Void>() {
87
88    override fun visitType(t: TypeMirror, p: Void?): TypeMirror {
89        return t
90    }
91
92    override fun defaultAction(o: Any?, p: Void?): TypeMirror {
93        throw TypeNotPresentException(o!!.toString(), null)
94    }
95}
96
97fun AnnotationValue.toListOfClassTypes(): List<TypeMirror> {
98    return TO_LIST_OF_TYPES.visit(this)
99}
100
101fun AnnotationValue.toType(): TypeMirror {
102    return TO_TYPE.visit(this)
103}
104
105fun AnnotationValue.toClassType(): TypeMirror? {
106    return TO_TYPE.visit(this)
107}
108
109fun TypeMirror.isCollection(): Boolean {
110    return MoreTypes.isType(this)
111            && (MoreTypes.isTypeOf(java.util.List::class.java, this)
112            || MoreTypes.isTypeOf(java.util.Set::class.java, this))
113}
114
115fun Element.getAnnotationValue(annotation: Class<out Annotation>, fieldName: String): Any? {
116    return MoreElements.getAnnotationMirror(this, annotation)
117            .orNull()?.let {
118        AnnotationMirrors.getAnnotationValue(it, fieldName)?.value
119    }
120}
121
122private val ANNOTATION_VALUE_TO_INT_VISITOR = object : SimpleAnnotationValueVisitor6<Int?, Void>() {
123    override fun visitInt(i: Int, p: Void?): Int? {
124        return i
125    }
126}
127
128private val ANNOTATION_VALUE_TO_BOOLEAN_VISITOR = object
129    : SimpleAnnotationValueVisitor6<Boolean?, Void>() {
130    override fun visitBoolean(b: Boolean, p: Void?): Boolean? {
131        return b
132    }
133}
134
135private val ANNOTATION_VALUE_TO_STRING_VISITOR = object
136    : SimpleAnnotationValueVisitor6<String?, Void>() {
137    override fun visitString(s: String?, p: Void?): String? {
138        return s
139    }
140}
141
142private val ANNOTATION_VALUE_STRING_ARR_VISITOR = object
143    : SimpleAnnotationValueVisitor6<List<String>, Void>() {
144    override fun visitArray(vals: MutableList<out AnnotationValue>?, p: Void?): List<String> {
145        return vals?.map {
146            ANNOTATION_VALUE_TO_STRING_VISITOR.visit(it)
147        }?.filterNotNull() ?: emptyList()
148    }
149}
150
151fun AnnotationValue.getAsInt(def: Int? = null): Int? {
152    return ANNOTATION_VALUE_TO_INT_VISITOR.visit(this) ?: def
153}
154
155fun AnnotationValue.getAsString(def: String? = null): String? {
156    return ANNOTATION_VALUE_TO_STRING_VISITOR.visit(this) ?: def
157}
158
159fun AnnotationValue.getAsBoolean(def: Boolean): Boolean {
160    return ANNOTATION_VALUE_TO_BOOLEAN_VISITOR.visit(this) ?: def
161}
162
163fun AnnotationValue.getAsStringList(): List<String> {
164    return ANNOTATION_VALUE_STRING_ARR_VISITOR.visit(this)
165}
166