SchemaEqualityUtil.kt
/*
* Copyright 2017 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 androidx.room.migration.bundle
import androidx.annotation.RestrictTo
/**
* utility class to run schema equality on collections.
*
* @hide
*/
@RestrictTo(RestrictTo.Scope.LIBRARY)
public object SchemaEqualityUtil {
public fun <T, K : SchemaEquality<K>> checkSchemaEquality(
map1: Map<T, K>?,
map2: Map<T, K>?
): Boolean {
return when {
map1 == null -> map2 == null
map2 == null -> false
map1.size != map2.size -> false
else -> map1.entries.all {
checkSchemaEquality(it.value, map2.get(it.key))
}
}
}
public fun <K : SchemaEquality<K>> checkSchemaEquality(
list1: List<K>?,
list2: List<K>?
): Boolean {
return when {
list1 == null -> list2 == null
list2 == null -> false
list1.size != list2.size -> false
else -> list1.all { item1 ->
list2.any { item2 ->
checkSchemaEquality(item1, item2)
}
}
}
}
@SuppressWarnings("SimplifiableIfStatement")
public fun <K : SchemaEquality<K>> checkSchemaEquality(
item1: K?,
item2: K?
): Boolean {
return when {
item1 == null -> item2 == null
item2 == null -> false
else -> item1.isSchemaEqual(item2)
}
}
}