| /* |
| * 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.parser; |
| |
| import java.io.BufferedReader; |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.sysml.conf.ConfigurationManager; |
| import org.apache.sysml.parser.common.CommonSyntacticValidator; |
| import org.apache.sysml.parser.common.CustomErrorListener.ParseIssue; |
| import org.apache.sysml.parser.dml.DMLParserWrapper; |
| import org.apache.sysml.parser.pydml.PyDMLParserWrapper; |
| import org.apache.sysml.runtime.util.LocalFileUtils; |
| |
| /** |
| * Base class for all dml parsers in order to make the various compilation chains |
| * independent of the used parser. |
| */ |
| public abstract class AParserWrapper |
| { |
| protected boolean atLeastOneError = false; |
| protected boolean atLeastOneWarning = false; |
| protected List<ParseIssue> parseIssues; |
| |
| /** |
| * |
| * @param fileName |
| * @param dmlScript |
| * @param argVals |
| * @return |
| * @throws ParseException |
| */ |
| public abstract DMLProgram parse(String fileName, String dmlScript, Map<String, String> argVals) |
| throws ParseException; |
| |
| |
| /** |
| * Factory method for creating instances of AParserWrapper, for |
| * simplificy fused with the abstract class. |
| * |
| * @param pydml true if a PyDML parser is needed |
| * @return |
| */ |
| public static AParserWrapper createParser(boolean pydml) |
| { |
| AParserWrapper ret = null; |
| |
| //create the parser instance |
| if( pydml ) |
| ret = new PyDMLParserWrapper(); |
| else |
| ret = new DMLParserWrapper(); |
| |
| CommonSyntacticValidator.init(); |
| |
| return ret; |
| } |
| |
| /** |
| * Custom wrapper to convert statement into statement blocks. Called by doParse and in DmlSyntacticValidator for for, parfor, while, ... |
| * @param current a statement |
| * @return corresponding statement block |
| */ |
| public static StatementBlock getStatementBlock(Statement current) { |
| StatementBlock blk = null; |
| if(current instanceof ParForStatement) { |
| blk = new ParForStatementBlock(); |
| blk.addStatement(current); |
| } |
| else if(current instanceof ForStatement) { |
| blk = new ForStatementBlock(); |
| blk.addStatement(current); |
| } |
| else if(current instanceof IfStatement) { |
| blk = new IfStatementBlock(); |
| blk.addStatement(current); |
| } |
| else if(current instanceof WhileStatement) { |
| blk = new WhileStatementBlock(); |
| blk.addStatement(current); |
| } |
| else { |
| // This includes ImportStatement |
| blk = new StatementBlock(); |
| blk.addStatement(current); |
| } |
| return blk; |
| } |
| |
| |
| public static String readDMLScript( String script, Log LOG) |
| throws IOException, LanguageException |
| { |
| String dmlScriptStr = null; |
| |
| //read DML script from file |
| if(script == null) |
| throw new LanguageException("DML script path was not specified!"); |
| |
| StringBuilder sb = new StringBuilder(); |
| BufferedReader in = null; |
| try |
| { |
| //read from hdfs or gpfs file system |
| if( script.startsWith("hdfs:") |
| || script.startsWith("gpfs:") ) |
| { |
| if( !LocalFileUtils.validateExternalFilename(script, true) ) |
| throw new LanguageException("Invalid (non-trustworthy) hdfs filename."); |
| FileSystem fs = FileSystem.get(ConfigurationManager.getCachedJobConf()); |
| Path scriptPath = new Path(script); |
| in = new BufferedReader(new InputStreamReader(fs.open(scriptPath))); |
| } |
| // from local file system |
| else |
| { |
| if( !LocalFileUtils.validateExternalFilename(script, false) ) |
| throw new LanguageException("Invalid (non-trustworthy) local filename."); |
| in = new BufferedReader(new FileReader(script)); |
| } |
| |
| //core script reading |
| String tmp = null; |
| while ((tmp = in.readLine()) != null) |
| { |
| sb.append( tmp ); |
| sb.append( "\n" ); |
| } |
| } |
| catch (IOException ex) |
| { |
| LOG.error("Failed to read the script from the file system", ex); |
| throw ex; |
| } |
| finally |
| { |
| if( in != null ) |
| in.close(); |
| } |
| |
| dmlScriptStr = sb.toString(); |
| |
| return dmlScriptStr; |
| } |
| |
| public boolean isAtLeastOneError() { |
| return atLeastOneError; |
| } |
| |
| public boolean isAtLeastOneWarning() { |
| return atLeastOneWarning; |
| } |
| |
| public List<ParseIssue> getParseIssues() { |
| return parseIssues; |
| } |
| } |