/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* 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.linkedin.pinot.core.operator.filter;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.linkedin.pinot.core.common.Block;
import com.linkedin.pinot.core.common.BlockId;
import com.linkedin.pinot.core.common.Operator;
import com.linkedin.pinot.core.operator.blocks.AndBlock;
import com.linkedin.pinot.core.operator.blocks.BaseFilterBlock;
import com.linkedin.pinot.core.operator.docidsets.FilterBlockDocIdSet;
public class AndOperator extends BaseFilterOperator {
private static final Logger LOGGER = LoggerFactory.getLogger(AndOperator.class);
private static final String OPERATOR_NAME = "AndOperator";
private List<BaseFilterOperator> operators;
private AndBlock andBlock;
public AndOperator(List<BaseFilterOperator> operators) {
this.operators = operators;
}
@Override
public boolean open() {
for (Operator operator : operators) {
operator.open();
}
return true;
}
@Override
public BaseFilterBlock nextFilterBlock(BlockId BlockId) {
List<FilterBlockDocIdSet> blockDocIdSets = new ArrayList<FilterBlockDocIdSet>();
for (Operator operator : operators) {
Block block = operator.nextBlock();
FilterBlockDocIdSet blockDocIdSet = (FilterBlockDocIdSet) block.getBlockDocIdSet();
blockDocIdSets.add(blockDocIdSet);
}
andBlock = new AndBlock(blockDocIdSets);
return andBlock;
}
@Override
public boolean isResultEmpty() {
for (BaseFilterOperator operator : operators) {
if (operator.isResultEmpty()) {
return true;
}
}
return false;
}
@Override
public boolean close() {
for (Operator operator : operators) {
operator.close();
}
return true;
}
@Override
public String getOperatorName() {
return OPERATOR_NAME;
}
}