| /* |
| * 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. |
| */ |
| package org.apache.vxquery.runtime.functions.base; |
| |
| import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| import org.apache.vxquery.datamodel.accessors.PointablePool; |
| import org.apache.vxquery.datamodel.accessors.PointablePoolFactory; |
| import org.apache.vxquery.datamodel.accessors.TaggedValuePointable; |
| |
| public abstract class AbstractTaggedValueArgumentAggregateEvaluator implements IAggregateEvaluator { |
| private final IScalarEvaluator[] args; |
| |
| private final TaggedValuePointable[] tvps; |
| |
| protected final PointablePool ppool = PointablePoolFactory.INSTANCE.createPointablePool(); |
| |
| public AbstractTaggedValueArgumentAggregateEvaluator(IScalarEvaluator[] args) { |
| this.args = args; |
| tvps = new TaggedValuePointable[args.length]; |
| for (int i = 0; i < tvps.length; ++i) { |
| tvps[i] = new TaggedValuePointable(); |
| } |
| } |
| |
| @Override |
| public void step(IFrameTupleReference tuple) throws HyracksDataException { |
| for (int i = 0; i < args.length; ++i) { |
| args[i].evaluate(tuple, tvps[i]); |
| } |
| step(tvps); |
| } |
| |
| protected abstract void step(TaggedValuePointable[] args) throws HyracksDataException; |
| } |