/* * 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.flink.table.runtime.arrow.writers; import org.apache.flink.annotation.Internal; import org.apache.flink.table.data.ArrayData; import org.apache.flink.table.data.DecimalData; import org.apache.flink.table.data.RowData; import org.apache.arrow.vector.DecimalVector; import java.math.BigDecimal; import static org.apache.flink.table.runtime.typeutils.PythonTypeUtils.fromBigDecimal; /** * {@link ArrowFieldWriter} for Decimal. */ @Internal public abstract class DecimalWriter<T> extends ArrowFieldWriter<T> { public static DecimalWriter<RowData> forRow(DecimalVector decimalVector, int precision, int scale) { return new DecimalWriterForRow(decimalVector, precision, scale); } public static DecimalWriter<ArrayData> forArray(DecimalVector decimalVector, int precision, int scale) { return new DecimalWriterForArray(decimalVector, precision, scale); } // ------------------------------------------------------------------------------------------ protected final int precision; protected final int scale; private DecimalWriter(DecimalVector decimalVector, int precision, int scale) { super(decimalVector); this.precision = precision; this.scale = scale; } abstract boolean isNullAt(T in, int ordinal); abstract DecimalData readDecimal(T in, int ordinal); @Override public void doWrite(T in, int ordinal) { if (isNullAt(in, ordinal)) { ((DecimalVector) getValueVector()).setNull(getCount()); } else { BigDecimal bigDecimal = readDecimal(in, ordinal).toBigDecimal(); bigDecimal = fromBigDecimal(bigDecimal, precision, scale); if (bigDecimal == null) { ((DecimalVector) getValueVector()).setNull(getCount()); } else { ((DecimalVector) getValueVector()).setSafe(getCount(), bigDecimal); } } } // ------------------------------------------------------------------------------------------ /** * {@link DecimalWriter} for {@link RowData} input. */ public static final class DecimalWriterForRow extends DecimalWriter<RowData> { private DecimalWriterForRow(DecimalVector decimalVector, int precision, int scale) { super(decimalVector, precision, scale); } @Override boolean isNullAt(RowData in, int ordinal) { return in.isNullAt(ordinal); } @Override DecimalData readDecimal(RowData in, int ordinal) { return in.getDecimal(ordinal, precision, scale); } } /** * {@link DecimalWriter} for {@link ArrayData} input. */ public static final class DecimalWriterForArray extends DecimalWriter<ArrayData> { private DecimalWriterForArray(DecimalVector decimalVector, int precision, int scale) { super(decimalVector, precision, scale); } @Override boolean isNullAt(ArrayData in, int ordinal) { return in.isNullAt(ordinal); } @Override DecimalData readDecimal(ArrayData in, int ordinal) { return in.getDecimal(ordinal, precision, scale); } } }