| /* |
| * 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.sysds.parser; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| public class MultiAssignmentStatement extends Statement |
| { |
| private ArrayList<DataIdentifier> _targetList; |
| private Expression _source; |
| |
| // rewrites statement to support function inlining (creates deep copy) |
| @Override |
| public Statement rewriteStatement(String prefix) { |
| ArrayList<DataIdentifier> newTargetList = new ArrayList<>(); |
| |
| // rewrite targetList (deep copy) |
| for (DataIdentifier target : _targetList){ |
| DataIdentifier newTarget = (DataIdentifier) target.rewriteExpression(prefix); |
| newTargetList.add(newTarget); |
| } |
| |
| // rewrite source (deep copy) |
| Expression newSource = _source.rewriteExpression(prefix); |
| |
| // create rewritten assignment statement (deep copy) |
| MultiAssignmentStatement retVal = new MultiAssignmentStatement(newTargetList, newSource); |
| retVal.setParseInfo(this); |
| |
| return retVal; |
| } |
| |
| public MultiAssignmentStatement(ArrayList<DataIdentifier> tList, Expression s){ |
| _targetList = tList; |
| _source = s; |
| } |
| |
| public ArrayList<DataIdentifier> getTargetList(){ |
| return _targetList; |
| } |
| |
| public void setTargetList(List<DataIdentifier> diList) { |
| _targetList.clear(); |
| _targetList.addAll(diList); |
| } |
| |
| public Expression getSource(){ |
| return _source; |
| } |
| |
| @Override |
| // conservative assignment to separate statement block; will merge later if possible |
| public boolean controlStatement() { |
| return true; |
| } |
| |
| @Override |
| public void initializeforwardLV(VariableSet activeIn) { } |
| |
| @Override |
| public VariableSet initializebackwardLV(VariableSet lo) { return lo; } |
| |
| @Override |
| public VariableSet variablesRead() { |
| VariableSet result = new VariableSet(); |
| // add variables read by source expression |
| result.addVariables(_source.variablesRead()); |
| // for any IndexedIdentifier on LHS, add variables for indexing expressions |
| for (int i=0; i<_targetList.size(); i++){ |
| if (_targetList.get(i) instanceof IndexedIdentifier) { |
| IndexedIdentifier target = (IndexedIdentifier) _targetList.get(i); |
| result.addVariables(target.variablesRead()); |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| public VariableSet variablesUpdated() { |
| |
| VariableSet result = new VariableSet(); |
| |
| // add target to updated list |
| for (DataIdentifier target : _targetList){ |
| result.addVariable(target.getName(), target); |
| } |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(Arrays.toString(_targetList.toArray())); |
| sb.append(" = "); |
| sb.append(_source.toString()); |
| sb.append(";"); |
| return sb.toString(); |
| } |
| |
| public void setSource(FunctionCallIdentifier s) { |
| _source = s; |
| } |
| } |