ahmedabu98 commented on code in PR #38061: URL: https://github.com/apache/beam/pull/38061#discussion_r3170815468
########## sdks/java/io/iceberg/src/main/java/org/apache/beam/sdk/io/iceberg/BeamRowWrapper.java: ########## @@ -0,0 +1,149 @@ +/* + * 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.beam.sdk.io.iceberg; + +import static org.apache.beam.sdk.util.Preconditions.checkStateNotNull; + +import java.lang.reflect.Array; +import java.math.BigDecimal; +import java.nio.ByteBuffer; +import java.time.Instant; +import java.time.LocalDate; +import java.time.LocalDateTime; +import java.time.LocalTime; +import java.util.concurrent.TimeUnit; +import org.apache.beam.sdk.schemas.Schema; +import org.apache.beam.sdk.schemas.Schema.FieldType; +import org.apache.beam.sdk.schemas.logicaltypes.Date; +import org.apache.beam.sdk.schemas.logicaltypes.DateTime; +import org.apache.beam.sdk.schemas.logicaltypes.FixedPrecisionNumeric; +import org.apache.beam.sdk.schemas.logicaltypes.MicrosInstant; +import org.apache.beam.sdk.schemas.logicaltypes.Time; +import org.apache.beam.sdk.values.Row; +import org.apache.iceberg.StructLike; +import org.apache.iceberg.types.Type; +import org.apache.iceberg.types.Types; +import org.apache.iceberg.util.DateTimeUtil; +import org.apache.iceberg.util.UUIDUtil; +import org.checkerframework.checker.nullness.qual.Nullable; + +public class BeamRowWrapper implements StructLike { + + private final FieldType[] types; + private final @Nullable PositionalGetter<?>[] getters; + private @Nullable Row row = null; + + public BeamRowWrapper(Schema schema, Types.StructType struct) { + int size = schema.getFieldCount(); + + types = (FieldType[]) Array.newInstance(FieldType.class, size); + getters = (PositionalGetter[]) Array.newInstance(PositionalGetter.class, size); + + for (int i = 0; i < size; i++) { + types[i] = schema.getField(i).getType(); + getters[i] = buildGetter(types[i], struct.fields().get(i).type()); + } + } + + public BeamRowWrapper wrap(@Nullable Row row) { + this.row = row; + return this; + } + + @Override + public int size() { + return types.length; + } + + @Override + public <T> @Nullable T get(int pos, Class<T> javaClass) { + if (row == null || row.getValue(pos) == null) { + return null; + } else if (getters[pos] != null) { + return javaClass.cast(getters[pos].get(checkStateNotNull(row), pos)); + } + + return javaClass.cast(checkStateNotNull(row).getValue(pos)); + } + + @Override + public <T> void set(int pos, T value) { + throw new UnsupportedOperationException( + "Could not set a field in the BeamRowWrapper because rowData is read-only"); + } + + private interface PositionalGetter<T> { + T get(Row data, int pos); + } + + private static @Nullable PositionalGetter<?> buildGetter(FieldType beamType, Type icebergType) { Review Comment: Added some java doc -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
