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[common] Introduce MAP type for ARROW, COMPACTED and INDEXED formats #2190
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166 changes: 166 additions & 0 deletions
166
fluss-common/src/main/java/org/apache/fluss/row/BinaryMap.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.fluss.row; | ||
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| import org.apache.fluss.annotation.PublicEvolving; | ||
| import org.apache.fluss.memory.MemorySegment; | ||
| import org.apache.fluss.row.array.PrimitiveBinaryArray; | ||
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| import java.io.Serializable; | ||
| import java.util.function.Supplier; | ||
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| import static org.apache.fluss.utils.Preconditions.checkArgument; | ||
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| /** | ||
| * Binary implementation of {@link InternalMap} backed by {@link MemorySegment}s. | ||
| * | ||
| * <p>The binary layout of {@link BinaryMap}: | ||
| * | ||
| * <pre> | ||
| * [4 byte(keyArray size in bytes)] + [Key BinaryArray] + [Value BinaryArray]. | ||
| * </pre> | ||
| * | ||
| * <p>Influenced by Apache Spark UnsafeMapData. | ||
| * | ||
| * @since 0.9 | ||
| */ | ||
| @PublicEvolving | ||
| public class BinaryMap extends BinarySection implements InternalMap { | ||
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| private static final long serialVersionUID = 1L; | ||
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| private transient BinaryArray keys; | ||
| private transient BinaryArray values; | ||
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| private final transient Supplier<BinaryArray> keyArraySupplier; | ||
| private final transient Supplier<BinaryArray> valueArraySupplier; | ||
| private final transient Supplier<BinaryMap> nestedMapSupplier; | ||
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| public BinaryMap() { | ||
| this( | ||
| (Supplier<BinaryArray> & Serializable) PrimitiveBinaryArray::new, | ||
| (Supplier<BinaryArray> & Serializable) PrimitiveBinaryArray::new, | ||
| (Supplier<BinaryMap> & Serializable) BinaryMap::new); | ||
| } | ||
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| public BinaryMap( | ||
| Supplier<BinaryArray> keyArraySupplier, | ||
| Supplier<BinaryArray> valueArraySupplier, | ||
| Supplier<BinaryMap> nestedMapSupplier) { | ||
| this.keyArraySupplier = keyArraySupplier; | ||
| this.valueArraySupplier = valueArraySupplier; | ||
| this.nestedMapSupplier = nestedMapSupplier; | ||
| } | ||
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| @Override | ||
| public int size() { | ||
| return keys.size(); | ||
| } | ||
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| @Override | ||
| public void pointTo(MemorySegment[] segments, int offset, int sizeInBytes) { | ||
| // Read the numBytes of key array from the first 4 bytes. | ||
| final int keyArrayBytes = BinarySegmentUtils.getInt(segments, offset); | ||
| assert keyArrayBytes >= 0 : "keyArraySize (" + keyArrayBytes + ") should >= 0"; | ||
| final int valueArrayBytes = sizeInBytes - keyArrayBytes - 4; | ||
| assert valueArrayBytes >= 0 : "valueArraySize (" + valueArrayBytes + ") should >= 0"; | ||
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| // see BinarySection.readObject, on this call stack, keys and values are not initialized | ||
| if (keys == null) { | ||
| keys = createKeyArrayInstance(); | ||
| } | ||
| keys.pointTo(segments, offset + 4, keyArrayBytes); | ||
| if (values == null) { | ||
| values = createValueArrayInstance(); | ||
| } | ||
| values.pointTo(segments, offset + 4 + keyArrayBytes, valueArrayBytes); | ||
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| assert keys.size() == values.size(); | ||
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| this.segments = segments; | ||
| this.offset = offset; | ||
| this.sizeInBytes = sizeInBytes; | ||
| } | ||
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| /** Creates a {@link BinaryArray} instance for keys with the nested data type information. */ | ||
| protected BinaryArray createKeyArrayInstance() { | ||
| return keyArraySupplier.get(); | ||
| } | ||
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| /** Creates a {@link BinaryArray} instance for values with the nested data type information. */ | ||
| protected BinaryArray createValueArrayInstance() { | ||
| return valueArraySupplier.get(); | ||
| } | ||
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| /** Creates a nested {@link BinaryMap} with the nested data type information. */ | ||
| protected BinaryMap createNestedMapInstance() { | ||
| return nestedMapSupplier.get(); | ||
| } | ||
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| @Override | ||
| public BinaryArray keyArray() { | ||
| return keys; | ||
| } | ||
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| @Override | ||
| public BinaryArray valueArray() { | ||
| return values; | ||
| } | ||
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| public BinaryMap copy() { | ||
| return copy(createNestedMapInstance()); | ||
| } | ||
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| public BinaryMap copy(BinaryMap reuse) { | ||
| byte[] bytes = BinarySegmentUtils.copyToBytes(segments, offset, sizeInBytes); | ||
| reuse.pointTo(MemorySegment.wrap(bytes), 0, sizeInBytes); | ||
| return reuse; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (!(o instanceof BinaryMap)) { | ||
| return false; | ||
| } | ||
| final BinarySection that = (BinarySection) o; | ||
| return sizeInBytes == that.sizeInBytes | ||
| && BinarySegmentUtils.equals( | ||
| segments, offset, that.segments, that.offset, sizeInBytes); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return BinarySegmentUtils.hash(segments, offset, sizeInBytes); | ||
| } | ||
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| public static BinaryMap valueOf(BinaryArray key, BinaryArray value, BinaryMap reuse) { | ||
| checkArgument(key.segments.length == 1 && value.getSegments().length == 1); | ||
| byte[] bytes = new byte[4 + key.sizeInBytes + value.sizeInBytes]; | ||
| MemorySegment segment = MemorySegment.wrap(bytes); | ||
| segment.putInt(0, key.sizeInBytes); | ||
| key.getSegments()[0].copyTo(key.getOffset(), segment, 4, key.sizeInBytes); | ||
| value.getSegments()[0].copyTo( | ||
| value.getOffset(), segment, 4 + key.sizeInBytes, value.sizeInBytes); | ||
| reuse.pointTo(segment, 0, bytes.length); | ||
| return reuse; | ||
| } | ||
| } | ||
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Class BinaryMap overrides hashCode but not equals.