1 /*
2  * Copyright (C) 2017 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 package androidx.room.vo
17 
18 import androidx.room.migration.bundle.PrimaryKeyBundle
19 import javax.lang.model.element.Element
20 
21 /**
22  * Represents a PrimaryKey for an Entity.
23  */
24 data class PrimaryKey(val declaredIn: Element?, val fields: List<Field>,
25                       val autoGenerateId: Boolean) : HasSchemaIdentity {
26     companion object {
27         val MISSING = PrimaryKey(null, emptyList(), false)
28     }
29 
<lambda>null30     val columnNames by lazy { fields.map { it.columnName } }
31 
toHumanReadableStringnull32     fun toHumanReadableString(): String {
33         return "PrimaryKey[" +
34                 fields.joinToString(separator = ", ", transform = Field::getPath) + "]"
35     }
36 
toBundlenull37     fun toBundle(): PrimaryKeyBundle = PrimaryKeyBundle(
38             autoGenerateId, fields.map { it.columnName })
39 
getIdKeynull40     override fun getIdKey(): String {
41         return "$autoGenerateId-${fields.map { it.columnName }}"
42     }
43 }
44