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/*
* Copyright (C) 2022 The Android Open Source Project
*
* 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.android.systemui.log.table
/**
* A object used with [TableLogBuffer] to store changes in variables over time. Is recyclable.
*
* Each message represents a change to exactly 1 type, specified by [DataType].
*/
data class TableChange(
var timestamp: Long = 0,
var columnPrefix: String = "",
var columnName: String = "",
var type: DataType = DataType.EMPTY,
var bool: Boolean = false,
var int: Int? = null,
var str: String? = null,
) {
/** Resets to default values so that the object can be recycled. */
fun reset(timestamp: Long, columnPrefix: String, columnName: String) {
this.timestamp = timestamp
this.columnPrefix = columnPrefix
this.columnName = columnName
this.type = DataType.EMPTY
this.bool = false
this.int = 0
this.str = null
}
/** Sets this to store a string change. */
fun set(value: String?) {
type = DataType.STRING
str = value
}
/** Sets this to store a boolean change. */
fun set(value: Boolean) {
type = DataType.BOOLEAN
bool = value
}
/** Sets this to store an int change. */
fun set(value: Int?) {
type = DataType.INT
int = value
}
/** Updates this to store the same value as [change]. */
fun updateTo(change: TableChange) {
reset(change.timestamp, change.columnPrefix, change.columnName)
when (change.type) {
DataType.STRING -> set(change.str)
DataType.INT -> set(change.int)
DataType.BOOLEAN -> set(change.bool)
DataType.EMPTY -> {}
}
}
/** Returns true if this object has a change. */
fun hasData(): Boolean {
return columnName.isNotBlank() && type != DataType.EMPTY
}
fun getName(): String {
return if (columnPrefix.isNotBlank()) {
"$columnPrefix.$columnName"
} else {
columnName
}
}
fun getVal(): String {
return when (type) {
DataType.EMPTY -> null
DataType.STRING -> str
DataType.INT -> int
DataType.BOOLEAN -> bool
}.toString()
}
enum class DataType {
STRING,
BOOLEAN,
INT,
EMPTY,
}
}
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