tokoko commented on code in PR #605: URL: https://github.com/apache/arrow-adbc/pull/605#discussion_r1462586795
########## java/driver/flight-sql/src/main/java/org/apache/arrow/adbc/driver/flightsql/ObjectMetadataBuilder.java: ########## @@ -0,0 +1,239 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 org.apache.arrow.adbc.driver.flightsql; + +import java.io.ByteArrayInputStream; +import java.io.IOException; +import java.nio.channels.Channels; +import java.nio.charset.StandardCharsets; +import java.util.*; +import org.apache.arrow.adbc.core.AdbcConnection; +import org.apache.arrow.adbc.core.AdbcException; +import org.apache.arrow.adbc.core.StandardSchemas; +import org.apache.arrow.flight.FlightEndpoint; +import org.apache.arrow.flight.FlightInfo; +import org.apache.arrow.flight.FlightStream; +import org.apache.arrow.flight.sql.FlightSqlClient; +import org.apache.arrow.memory.ArrowBuf; +import org.apache.arrow.memory.BufferAllocator; +import org.apache.arrow.vector.VarBinaryVector; +import org.apache.arrow.vector.VarCharVector; +import org.apache.arrow.vector.VectorSchemaRoot; +import org.apache.arrow.vector.complex.ListVector; +import org.apache.arrow.vector.complex.impl.UnionListWriter; +import org.apache.arrow.vector.complex.writer.BaseWriter; +import org.apache.arrow.vector.complex.writer.VarCharWriter; +import org.apache.arrow.vector.ipc.ReadChannel; +import org.apache.arrow.vector.ipc.message.MessageSerializer; +import org.apache.arrow.vector.types.pojo.Field; +import org.apache.arrow.vector.types.pojo.Schema; + +final class ObjectMetadataBuilder { + + private final FlightSqlClient client; + private final VectorSchemaRoot root; + private final VarCharVector adbcCatalogNames; + private final UnionListWriter adbcCatalogDbSchemasWriter; + private final BaseWriter.StructWriter adbcCatalogDbSchemasStructWriter; + private final BaseWriter.ListWriter adbcCatalogDbSchemaTablesWriter; + private final VarCharWriter adbcCatalogDbSchemaNameWriter; + private final BaseWriter.StructWriter adbcTablesStructWriter; + private final VarCharWriter adbcTableNameWriter; + private final VarCharWriter adbcTableTypeWriter; + private final BaseWriter.ListWriter adbcTableColumnsWriter; + private final BufferAllocator allocator; + private final AdbcConnection.GetObjectsDepth depth; + private final String catalogPattern; + private final String dbSchemaPattern; + private final String tableNamePattern; + private final String[] tableTypes; + private final String columnNamePattern; + + ObjectMetadataBuilder( + BufferAllocator allocator, + FlightSqlClient client, + final AdbcConnection.GetObjectsDepth depth, + final String catalogPattern, + final String dbSchemaPattern, + final String tableNamePattern, + final String[] tableTypes, + final String columnNamePattern) { + this.allocator = allocator; + this.client = client; + this.depth = depth; + this.catalogPattern = catalogPattern; + this.dbSchemaPattern = dbSchemaPattern; + this.tableNamePattern = tableNamePattern; + this.tableTypes = tableTypes; + this.columnNamePattern = columnNamePattern; + this.root = VectorSchemaRoot.create(StandardSchemas.GET_OBJECTS_SCHEMA, allocator); + this.adbcCatalogNames = (VarCharVector) root.getVector(0); + this.adbcCatalogDbSchemasWriter = ((ListVector) root.getVector(1)).getWriter(); + this.adbcCatalogDbSchemasStructWriter = adbcCatalogDbSchemasWriter.struct(); + this.adbcCatalogDbSchemaTablesWriter = + adbcCatalogDbSchemasStructWriter.list("db_schema_tables"); + this.adbcCatalogDbSchemaNameWriter = adbcCatalogDbSchemasStructWriter.varChar("db_schema_name"); + this.adbcTablesStructWriter = adbcCatalogDbSchemaTablesWriter.struct(); + this.adbcTableNameWriter = adbcTablesStructWriter.varChar("table_name"); + this.adbcTableTypeWriter = adbcTablesStructWriter.varChar("table_type"); + this.adbcTableColumnsWriter = adbcTablesStructWriter.list("table_columns"); + } + + private void writeVarChar(VarCharWriter writer, String value) { + byte[] bytes = value.getBytes(StandardCharsets.UTF_8); + try (ArrowBuf tempBuf = allocator.buffer(bytes.length)) { + tempBuf.setBytes(0, bytes, 0, bytes.length); + writer.writeVarChar(0, bytes.length, tempBuf); + } + } + + private boolean patternMatched(String name, String pattern) { + if (pattern == null) { + return true; + } + + return name.matches(pattern.replace("_", ".").replace("%", ".*")); Review Comment: moved quote and precompile step to constructor -- This is an automated message from the Apache Git Service. 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