| /* |
| * 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.hyracks.algebricks.core.algebra.operators.logical; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.commons.lang3.mutable.Mutable; |
| import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import org.apache.hyracks.algebricks.common.utils.Pair; |
| import org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator; |
| import org.apache.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| import org.apache.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment; |
| import org.apache.hyracks.algebricks.core.algebra.properties.VariablePropagationPolicy; |
| import org.apache.hyracks.algebricks.core.algebra.typing.ITypingContext; |
| import org.apache.hyracks.algebricks.core.algebra.visitors.ILogicalExpressionReferenceTransform; |
| |
| /** |
| * Abstract class for two replication related operator - replicate and split |
| * Replicate operator propagates all frames to all output branches. |
| * That is, each tuple will be propagated to all output branches. |
| * Split operator propagates each tuple in a frame to one output branch only. |
| */ |
| public abstract class AbstractReplicateOperator extends AbstractLogicalOperator { |
| |
| private int outputArity; |
| private boolean[] outputMaterializationFlags; |
| private List<Mutable<ILogicalOperator>> outputs; |
| |
| public AbstractReplicateOperator(int outputArity) { |
| this.outputArity = outputArity; |
| this.outputMaterializationFlags = new boolean[outputArity]; |
| this.outputs = new ArrayList<>(); |
| } |
| |
| public AbstractReplicateOperator(int outputArity, boolean[] outputMaterializationFlags) { |
| this.outputArity = outputArity; |
| this.outputMaterializationFlags = outputMaterializationFlags; |
| this.outputs = new ArrayList<>(); |
| } |
| |
| @Override |
| public boolean acceptExpressionTransform(ILogicalExpressionReferenceTransform transform) |
| throws AlgebricksException { |
| return false; |
| } |
| |
| @Override |
| public VariablePropagationPolicy getVariablePropagationPolicy() { |
| return VariablePropagationPolicy.ALL; |
| } |
| |
| @Override |
| public boolean isMap() { |
| return true; |
| } |
| |
| @Override |
| public void recomputeSchema() { |
| schema = new ArrayList<LogicalVariable>(inputs.get(0).getValue().getSchema()); |
| } |
| |
| public int getOutputArity() { |
| return outputArity; |
| } |
| |
| public void setOutputMaterializationFlags(boolean[] outputMaterializationFlags) { |
| this.outputMaterializationFlags = outputMaterializationFlags; |
| } |
| |
| public boolean[] getOutputMaterializationFlags() { |
| return outputMaterializationFlags; |
| } |
| |
| public List<Mutable<ILogicalOperator>> getOutputs() { |
| return outputs; |
| } |
| |
| public void setOutputs(List<Pair<Mutable<ILogicalOperator>, Boolean>> newOutputs) { |
| // shrinking or expanding num of outputs |
| if (outputMaterializationFlags.length != newOutputs.size()) { |
| outputMaterializationFlags = new boolean[newOutputs.size()]; |
| } |
| outputs.clear(); |
| for (int i = 0; i < newOutputs.size(); i++) { |
| outputs.add(newOutputs.get(i).first); |
| outputMaterializationFlags[i] = newOutputs.get(i).second; |
| } |
| outputArity = newOutputs.size(); |
| } |
| |
| @Override |
| public IVariableTypeEnvironment computeOutputTypeEnvironment(ITypingContext ctx) throws AlgebricksException { |
| return createPropagatingAllInputsTypeEnvironment(ctx); |
| } |
| |
| public boolean isBlocker() { |
| for (boolean requiresMaterialization : outputMaterializationFlags) { |
| if (requiresMaterialization) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public boolean isMaterialized(ILogicalOperator op) { |
| for (int i = 0; i < outputs.size(); i++) { |
| if (outputs.get(i).getValue() == op) { |
| return outputMaterializationFlags[i]; |
| } |
| } |
| return false; |
| } |
| } |