/*
* 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.operator.aggregation.state;
import com.facebook.presto.array.ObjectBigArray;
import com.facebook.presto.operator.aggregation.MultiKeyValuePairs;
import com.facebook.presto.spi.function.AccumulatorStateFactory;
import com.facebook.presto.spi.type.Type;
import static java.util.Objects.requireNonNull;
public class MultiKeyValuePairsStateFactory
implements AccumulatorStateFactory<MultiKeyValuePairsState>
{
private final Type keyType;
private final Type valueType;
public MultiKeyValuePairsStateFactory(Type keyType, Type valueType)
{
this.keyType = keyType;
this.valueType = valueType;
}
@Override
public MultiKeyValuePairsState createSingleState()
{
return new SingleState(keyType, valueType);
}
@Override
public Class<? extends MultiKeyValuePairsState> getSingleStateClass()
{
return SingleState.class;
}
@Override
public MultiKeyValuePairsState createGroupedState()
{
return new GroupedState(keyType, valueType);
}
@Override
public Class<? extends MultiKeyValuePairsState> getGroupedStateClass()
{
return GroupedState.class;
}
public static class GroupedState
extends AbstractGroupedAccumulatorState
implements MultiKeyValuePairsState
{
private final Type keyType;
private final Type valueType;
private final ObjectBigArray<MultiKeyValuePairs> pairs = new ObjectBigArray<>();
private long size;
public GroupedState(Type keyType, Type valueType)
{
this.keyType = keyType;
this.valueType = valueType;
}
@Override
public void ensureCapacity(long size)
{
pairs.ensureCapacity(size);
}
@Override
public MultiKeyValuePairs get()
{
return pairs.get(getGroupId());
}
@Override
public void set(MultiKeyValuePairs value)
{
requireNonNull(value, "value is null");
MultiKeyValuePairs previous = get();
if (previous != null) {
size -= previous.estimatedInMemorySize();
}
pairs.set(getGroupId(), value);
size += value.estimatedInMemorySize();
}
@Override
public void addMemoryUsage(long memory)
{
size += memory;
}
@Override
public Type getKeyType()
{
return keyType;
}
@Override
public Type getValueType()
{
return valueType;
}
@Override
public long getEstimatedSize()
{
return size + pairs.sizeOf();
}
}
public static class SingleState
implements MultiKeyValuePairsState
{
private final Type keyType;
private final Type valueType;
private MultiKeyValuePairs pair;
public SingleState(Type keyType, Type valueType)
{
this.keyType = keyType;
this.valueType = valueType;
}
@Override
public MultiKeyValuePairs get()
{
return pair;
}
@Override
public void set(MultiKeyValuePairs value)
{
pair = value;
}
@Override
public void addMemoryUsage(long memory)
{
}
@Override
public Type getKeyType()
{
return keyType;
}
@Override
public Type getValueType()
{
return valueType;
}
@Override
public long getEstimatedSize()
{
if (pair == null) {
return 0;
}
return pair.estimatedInMemorySize();
}
}
}