| /* |
| * 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.sysml.hops.rewrite; |
| |
| import java.util.ArrayList; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.sysml.hops.DataOp; |
| import org.apache.sysml.hops.Hop; |
| import org.apache.sysml.hops.HopsException; |
| import org.apache.sysml.hops.LiteralOp; |
| import org.apache.sysml.runtime.DMLRuntimeException; |
| import org.apache.sysml.utils.Explain; |
| |
| /** |
| * This class allows to check hop dags for validity, e.g., parent-child linking. |
| * It purpose is soley for debugging purposes (enabled in ProgramRewriter). |
| * |
| */ |
| public class HopDagValidator |
| { |
| private static final Log LOG = LogFactory.getLog(HopDagValidator.class.getName()); |
| |
| /** |
| * |
| * @param roots |
| * @throws HopsException |
| * @throws DMLRuntimeException |
| */ |
| public static void validateHopDag(ArrayList<Hop> roots) |
| throws HopsException |
| { |
| if( roots == null ) |
| return; |
| try |
| { |
| Hop.resetVisitStatus(roots); |
| for( Hop hop : roots ) |
| rValidateHop(hop); |
| } |
| catch(HopsException ex) |
| { |
| try { |
| LOG.error( "\n"+Explain.explainHops(roots) ); |
| }catch(DMLRuntimeException e){} |
| |
| throw ex; |
| } |
| } |
| |
| /** |
| * |
| * @param root |
| * @throws HopsException |
| */ |
| public static void validateHopDag(Hop root) |
| throws HopsException |
| { |
| if( root == null ) |
| return; |
| |
| try |
| { |
| root.resetVisitStatus(); |
| rValidateHop(root); |
| } |
| catch(HopsException ex) |
| { |
| try { |
| LOG.error( "\n"+Explain.explain(root) ); |
| }catch(DMLRuntimeException e){} |
| |
| throw ex; |
| } |
| } |
| |
| /** |
| * |
| * @param hop |
| * @throws HopsException |
| */ |
| private static void rValidateHop( Hop hop ) |
| throws HopsException |
| { |
| if(hop.getVisited() == Hop.VisitStatus.DONE) |
| return; |
| |
| //check parent linking |
| for( Hop parent : hop.getParent() ) |
| if( !parent.getInput().contains(hop) ) |
| throw new HopsException("Hop id="+hop.getHopID()+" not properly linked to its parent pid="+parent.getHopID()+" "+parent.getClass().getName()); |
| |
| //check child linking |
| for( Hop child : hop.getInput() ) |
| if( !child.getParent().contains(hop) ) |
| throw new HopsException("Hop id="+hop.getHopID()+" not properly linked to its child cid="+child.getHopID()+" "+child.getClass().getName()); |
| |
| //check empty childs |
| if( hop.getInput().isEmpty() ) |
| if( !(hop instanceof DataOp || hop instanceof LiteralOp) ) |
| throw new HopsException("Hop id="+hop.getHopID()+" is not a dataop/literal but has no childs."); |
| |
| //recursively process childs |
| for( Hop child : hop.getInput() ) |
| rValidateHop(child); |
| |
| hop.setVisited(Hop.VisitStatus.DONE); |
| } |
| } |