/*
* Copyright 2021 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.solver.query.result
import androidx.room.compiler.processing.XType
import androidx.room.ext.L
import androidx.room.ext.T
import androidx.room.parser.ParsedQuery
import androidx.room.processor.Context
import androidx.room.solver.CodeGenScope
import com.squareup.javapoet.ClassName
import com.squareup.javapoet.ParameterizedTypeName
class GuavaImmutableMultimapQueryResultAdapter(
context: Context,
private val parsedQuery: ParsedQuery,
override val keyTypeArg: XType,
override val valueTypeArg: XType,
private val keyRowAdapter: QueryMappedRowAdapter,
private val valueRowAdapter: QueryMappedRowAdapter,
private val immutableClassName: ClassName,
) : MultimapQueryResultAdapter(context, parsedQuery, listOf(keyRowAdapter, valueRowAdapter)) {
private val mapType = ParameterizedTypeName.get(
immutableClassName,
keyTypeArg.typeName,
valueTypeArg.typeName
)
override fun convert(outVarName: String, cursorVarName: String, scope: CodeGenScope) {
val mapVarName = scope.getTmpVar("_mapBuilder")
scope.builder().apply {
val dupeColumnsIndexAdapter: AmbiguousColumnIndexAdapter?
if (duplicateColumns.isNotEmpty()) {
// There are duplicate columns in the result objects, generate code that provides
// us with the indices resolved and pass it to the adapters so it can retrieve
// the index of each column used by it.
dupeColumnsIndexAdapter = AmbiguousColumnIndexAdapter(mappings, parsedQuery)
dupeColumnsIndexAdapter.onCursorReady(cursorVarName, scope)
rowAdapters.forEach {
check(it is QueryMappedRowAdapter)
val indexVarNames = dupeColumnsIndexAdapter.getIndexVarsForMapping(it.mapping)
it.onCursorReady(
indices = indexVarNames,
cursorVarName = cursorVarName,
scope = scope
)
}
} else {
dupeColumnsIndexAdapter = null
rowAdapters.forEach {
it.onCursorReady(cursorVarName = cursorVarName, scope = scope)
}
}
addStatement(
"final $T.Builder<$T, $T> $L = $T.builder()",
immutableClassName,
keyTypeArg.typeName,
valueTypeArg.typeName,
mapVarName,
immutableClassName
)
val tmpKeyVarName = scope.getTmpVar("_key")
val tmpValueVarName = scope.getTmpVar("_value")
beginControlFlow("while ($L.moveToNext())", cursorVarName).apply {
addStatement("final $T $L", keyTypeArg.typeName, tmpKeyVarName)
keyRowAdapter.convert(tmpKeyVarName, cursorVarName, scope)
// Iterate over all matched fields to check if all are null. If so, we continue in
// the while loop to the next iteration.
val valueIndexVars =
dupeColumnsIndexAdapter?.getIndexVarsForMapping(valueRowAdapter.mapping)
?: valueRowAdapter.getDefaultIndexAdapter().getIndexVars()
val columnNullCheckCodeBlock = getColumnNullCheckCode(
cursorVarName = cursorVarName,
indexVars = valueIndexVars
)
// Perform column null check
beginControlFlow("if ($L)", columnNullCheckCodeBlock).apply {
addStatement("continue")
}.endControlFlow()
addStatement("final $T $L", valueTypeArg.typeName, tmpValueVarName)
valueRowAdapter.convert(tmpValueVarName, cursorVarName, scope)
addStatement("$L.put($L, $L)", mapVarName, tmpKeyVarName, tmpValueVarName)
}
endControlFlow()
addStatement("final $T $L = $L.build()", mapType, outVarName, mapVarName)
}
}
}