| /* |
| * 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. |
| */ |
| |
| /** |
| * This grammar is used to process parameters passed from |
| * command line or config file |
| */ |
| |
| options { |
| // Generate non-static functions |
| STATIC = false; |
| JAVA_UNICODE_ESCAPE = true; |
| } |
| PARSER_BEGIN(ParamLoader) |
| package org.apache.pig.tools.parameters; |
| |
| import java.io.IOException; |
| import java.util.Hashtable; |
| |
| //warnings in by code generated by javacc cannot be fixed here, |
| // so suppressing all warnings for this class. But this does not help in |
| //supressing Warnings in other classes generated by this .jj file |
| @SuppressWarnings("all") |
| |
| public class ParamLoader { |
| |
| private PreprocessorContext pc; |
| public void setContext(PreprocessorContext pc) { |
| this.pc = pc; |
| } |
| |
| private static String unquote(String s) |
| { |
| if (s.charAt(0) == '\'' && s.charAt(s.length()-1) == '\'') |
| return s.substring(1, s.length()-1); |
| else if (s.charAt(0) == '"' && s.charAt(s.length()-1) == '"') |
| return s.substring(1, s.length()-1); |
| else |
| return s; |
| } |
| } |
| |
| PARSER_END(ParamLoader) |
| |
| SKIP : |
| { |
| "\n" |
| | "\r" |
| | " " |
| | "\t" |
| } |
| |
| TOKEN: |
| { |
| <#LETTER : ["a"-"z", "A"-"Z"] > |
| | |
| <#DIGIT : ["0"-"9"] > |
| | |
| <#SPECIALCHAR : ["_"] > |
| } |
| |
| TOKEN : |
| { |
| // <IDENTIFIER: (<LETTER> | <SPECIALCHAR>) (<DIGIT> | <LETTER> | <SPECIALCHAR>)*> |
| <IDENTIFIER: (<SPECIALCHAR>)*<LETTER>(<DIGIT> | <LETTER> | <SPECIALCHAR>)*> |
| | |
| <OTHER: ~["\"" , "'" , "`" , "a"-"z" , "A"-"Z" , "_" , "#" , "=" , " " , "\n" , "\t" , "\r"] (~["\n","\r"])* > |
| | |
| <LITERAL: ("\"" ((~["\""])*("\\\"")?)* "\"")|("'" ((~["'"])*("\\\'")?)* "'") > |
| | |
| <SHELLCMD: "`" (~["`"])* "`" > |
| | |
| <EQUALS: "=" > |
| | |
| <COMMENT: "#" (~["\n"])* ("\n"|"\r") > |
| |
| } |
| |
| |
| |
| boolean Parse() throws IOException : |
| { |
| Token id, val; |
| boolean more=true; |
| String s; |
| } |
| { |
| ( |
| ( |
| id=<IDENTIFIER> |
| <EQUALS> |
| ( |
| val=<OTHER> { pc.processOrdLine(id.image , val.image);} |
| | |
| val=<IDENTIFIER> |
| {s = val.image;} |
| ( |
| val =<OTHER> |
| {s += val.image;} |
| )? |
| {pc.processOrdLine(id.image , s);} |
| | |
| val=<SHELLCMD> { pc.processShellCmd(id.image , val.image);} |
| | |
| val=<LITERAL> { s = unquote(val.image); pc.processOrdLine(id.image , s); } |
| ) |
| ) |
| | |
| <COMMENT> { } |
| | |
| <EOF> { more=false; } |
| ) { return more; } |
| |
| |
| } |
| |
| |