/*
* 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.raptor.systemtables;
import com.facebook.presto.spi.Page;
import com.facebook.presto.spi.PageBuilder;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.type.Type;
import com.google.common.collect.ImmutableList;
import java.util.List;
class PageListBuilder
{
private final PageBuilder pageBuilder;
private final ImmutableList.Builder<Page> pages = ImmutableList.builder();
private int channel;
public PageListBuilder(List<Type> types)
{
this.pageBuilder = new PageBuilder(types);
}
public List<Page> build()
{
if (!pageBuilder.isEmpty()) {
pages.add(pageBuilder.build());
pageBuilder.reset();
}
return pages.build();
}
public void beginRow()
{
if (pageBuilder.isFull()) {
pages.add(pageBuilder.build());
pageBuilder.reset();
}
pageBuilder.declarePosition();
channel = 0;
}
public BlockBuilder nextBlockBuilder()
{
int currentChannel = channel;
channel++;
return pageBuilder.getBlockBuilder(currentChannel);
}
}