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Move Block.read and BlockBuilder.write to TypeUtils
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86 changes: 86 additions & 0 deletions
86
presto-spi/src/main/java/com/facebook/presto/spi/type/TypeUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * 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 com.facebook.presto.spi.type; | ||
|
|
||
| import com.facebook.presto.spi.block.Block; | ||
| import com.facebook.presto.spi.block.BlockBuilder; | ||
| import io.airlift.slice.Slice; | ||
| import io.airlift.slice.Slices; | ||
|
|
||
| public final class TypeUtils | ||
| { | ||
| private TypeUtils() | ||
| { | ||
| } | ||
|
|
||
| /** | ||
| * Get the native value as an object in the value at {@code position} of {@code block}. | ||
| */ | ||
| public static Object readNativeValue(Type type, Block block, int position) | ||
| { | ||
| Class<?> javaType = type.getJavaType(); | ||
|
|
||
| if (block.isNull(position)) { | ||
| return null; | ||
| } | ||
| if (javaType == long.class) { | ||
| return type.getLong(block, position); | ||
| } | ||
| if (javaType == double.class) { | ||
| return type.getDouble(block, position); | ||
| } | ||
| if (javaType == boolean.class) { | ||
| return type.getBoolean(block, position); | ||
| } | ||
| if (javaType == Slice.class) { | ||
| return type.getSlice(block, position); | ||
| } | ||
| return type.getObject(block, position); | ||
| } | ||
|
|
||
| /** | ||
| * Write a native value object to the current entry of {@code blockBuilder}. | ||
| */ | ||
| public static void writeNativeValue(Type type, BlockBuilder blockBuilder, Object value) | ||
| { | ||
| if (value == null) { | ||
| blockBuilder.appendNull(); | ||
| } | ||
| else if (type.getJavaType() == boolean.class) { | ||
| type.writeBoolean(blockBuilder, (Boolean) value); | ||
| } | ||
| else if (type.getJavaType() == double.class) { | ||
| type.writeDouble(blockBuilder, ((Number) value).doubleValue()); | ||
| } | ||
| else if (type.getJavaType() == long.class) { | ||
| type.writeLong(blockBuilder, ((Number) value).longValue()); | ||
| } | ||
| else if (type.getJavaType() == Slice.class) { | ||
| Slice slice; | ||
| if (value instanceof byte[]) { | ||
| slice = Slices.wrappedBuffer((byte[]) value); | ||
| } | ||
| else if (value instanceof String) { | ||
| slice = Slices.utf8Slice((String) value); | ||
| } | ||
| else { | ||
| slice = (Slice) value; | ||
| } | ||
| type.writeSlice(blockBuilder, slice, 0, slice.length()); | ||
| } | ||
| else { | ||
| type.writeObject(blockBuilder, value); | ||
| } | ||
| } | ||
| } |