| /* |
| * 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.codegen.XClassName |
| import androidx.room.compiler.codegen.XCodeBlock |
| import androidx.room.compiler.processing.XType |
| import androidx.room.ext.GuavaTypeNames |
| import androidx.room.parser.ParsedQuery |
| import androidx.room.processor.Context |
| import androidx.room.solver.CodeGenScope |
| |
| 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: XClassName, |
| ) : MultimapQueryResultAdapter(context, parsedQuery, listOf(keyRowAdapter, valueRowAdapter)) { |
| private val mapType = immutableClassName.parametrizedBy( |
| keyTypeArg.asTypeName(), |
| valueTypeArg.asTypeName() |
| ) |
| |
| 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) |
| } |
| } |
| |
| val builderClassName = when (immutableClassName) { |
| GuavaTypeNames.IMMUTABLE_LIST_MULTIMAP -> |
| GuavaTypeNames.IMMUTABLE_LIST_MULTIMAP_BUILDER |
| |
| GuavaTypeNames.IMMUTABLE_SET_MULTIMAP -> |
| GuavaTypeNames.IMMUTABLE_SET_MULTIMAP_BUILDER |
| |
| else -> |
| // Return type is base class ImmutableMultimap, need the case handled here, |
| // but won't actually get here in the code if this is the case as we will |
| // do an early return in TypeAdapterStore.kt. |
| GuavaTypeNames.IMMUTABLE_MULTIMAP_BUILDER |
| } |
| |
| addLocalVariable( |
| name = mapVarName, |
| typeName = builderClassName.parametrizedBy( |
| keyTypeArg.asTypeName(), |
| valueTypeArg.asTypeName() |
| ), |
| assignExpr = XCodeBlock.of( |
| language = language, |
| format = "%T.builder()", |
| immutableClassName |
| ) |
| ) |
| |
| val tmpKeyVarName = scope.getTmpVar("_key") |
| val tmpValueVarName = scope.getTmpVar("_value") |
| beginControlFlow("while (%L.moveToNext())", cursorVarName).apply { |
| addLocalVariable( |
| name = tmpKeyVarName, |
| typeName = keyTypeArg.asTypeName() |
| ) |
| 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( |
| language = language, |
| cursorVarName = cursorVarName, |
| indexVars = valueIndexVars |
| ) |
| // Perform column null check |
| beginControlFlow("if (%L)", columnNullCheckCodeBlock).apply { |
| addStatement("continue") |
| }.endControlFlow() |
| |
| addLocalVariable( |
| name = tmpValueVarName, |
| typeName = valueTypeArg.asTypeName() |
| ) |
| valueRowAdapter.convert(tmpValueVarName, cursorVarName, scope) |
| addStatement("%L.put(%L, %L)", mapVarName, tmpKeyVarName, tmpValueVarName) |
| } |
| endControlFlow() |
| addLocalVariable( |
| name = outVarName, |
| typeName = mapType, |
| assignExpr = XCodeBlock.of( |
| language = language, |
| format = "%L.build()", |
| mapVarName |
| ) |
| ) |
| } |
| } |
| } |