| 1 | package felix.parser; |
| 2 | |
| 3 | import java.io.FileInputStream; |
| 4 | import java.io.InputStream; |
| 5 | import java.util.zip.GZIPInputStream; |
| 6 | |
| 7 | import org.antlr.runtime.ANTLRInputStream; |
| 8 | import org.antlr.runtime.ANTLRStringStream; |
| 9 | import org.antlr.runtime.CharStream; |
| 10 | import org.antlr.runtime.CommonTokenStream; |
| 11 | |
| 12 | import felix.dstruct.FelixQuery; |
| 13 | |
| 14 | import tuffy.util.ExceptionMan; |
| 15 | |
| 16 | /** |
| 17 | * Class that parses program/evidence files. |
| 18 | * @author Ce Zhang |
| 19 | * |
| 20 | */ |
| 21 | public class FelixInputParser { |
| 22 | |
| 23 | FelixQuery mln; |
| 24 | |
| 25 | /** |
| 26 | * The constructor. |
| 27 | * @param amln |
| 28 | */ |
| 29 | public FelixInputParser(FelixQuery amln){ |
| 30 | mln = amln; |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * Parses given program file. |
| 35 | * @param fprog |
| 36 | */ |
| 37 | public void parseProgramFile(String fprog){ |
| 38 | FELIXParser parser = new FELIXParser(getTokens(fprog)); |
| 39 | parser.ml = this.mln; |
| 40 | try { |
| 41 | parser.definitions(); |
| 42 | } catch (Exception e) { |
| 43 | mln.closeFiles(); |
| 44 | ExceptionMan.handle(e); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Parses given evidence file. |
| 50 | * @param fevid |
| 51 | */ |
| 52 | public void parseEvidenceFile(String fevid){ |
| 53 | FELIXParser parser = new FELIXParser(getTokens(fevid)); |
| 54 | parser.ml = this.mln; |
| 55 | try { |
| 56 | parser.evidenceList(); |
| 57 | } catch (Exception e) { |
| 58 | mln.closeFiles(); |
| 59 | ExceptionMan.handle(e); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Parses given evidence string. |
| 65 | * @param chunk |
| 66 | * @param lineOffset |
| 67 | */ |
| 68 | public void parseEvidenceString(String chunk, long lineOffset){ |
| 69 | ANTLRStringStream input = new ANTLRStringStream(chunk); |
| 70 | FELIXLexer lexer = new FELIXLexer(input); |
| 71 | CommonTokenStream tokens = new CommonTokenStream(lexer); |
| 72 | FELIXParser parser = new FELIXParser(tokens); |
| 73 | parser.lineOffset = lineOffset; |
| 74 | parser.ml = this.mln; |
| 75 | try { |
| 76 | parser.evidenceList(); |
| 77 | parser.reset(); |
| 78 | tokens.reset(); |
| 79 | lexer.reset(); |
| 80 | input.reset(); |
| 81 | parser.ml = null; |
| 82 | parser = null; |
| 83 | } catch (Exception e) { |
| 84 | mln.closeFiles(); |
| 85 | ExceptionMan.handle(e); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Parses query file. |
| 91 | * @param fquery |
| 92 | */ |
| 93 | public void parseQueryFile(String fquery){ |
| 94 | FELIXParser parser = new FELIXParser(getTokens(fquery)); |
| 95 | parser.ml = this.mln; |
| 96 | try { |
| 97 | parser.queryList(); |
| 98 | } catch (Exception e) { |
| 99 | mln.closeFiles(); |
| 100 | ExceptionMan.handle(e); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Parses query atom list. |
| 106 | * @param queryAtoms |
| 107 | */ |
| 108 | public void parseQueryCommaList(String queryAtoms){ |
| 109 | CharStream input = new ANTLRStringStream(queryAtoms); |
| 110 | FELIXLexer lexer = new FELIXLexer(input); |
| 111 | CommonTokenStream tokens = new CommonTokenStream(lexer); |
| 112 | FELIXParser parser = new FELIXParser(tokens); |
| 113 | parser.ml = this.mln; |
| 114 | try { |
| 115 | parser.queryCommaList(); |
| 116 | } catch (Exception e) { |
| 117 | mln.closeFiles(); |
| 118 | ExceptionMan.handle(e); |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Parses program file(s) from given string. |
| 124 | * @param strProgs |
| 125 | */ |
| 126 | public void parseProgramFileFromString(String strProgs){ |
| 127 | CharStream input = new ANTLRStringStream(strProgs); |
| 128 | FELIXLexer lexer = new FELIXLexer(input); |
| 129 | CommonTokenStream tokens = new CommonTokenStream(lexer); |
| 130 | FELIXParser parser = new FELIXParser(tokens); |
| 131 | parser.ml = this.mln; |
| 132 | try { |
| 133 | parser.definitions(); |
| 134 | } catch (Exception e) { |
| 135 | mln.closeFiles(); |
| 136 | ExceptionMan.handle(e); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Returns token stream for given file. |
| 142 | * @param fname |
| 143 | * @return |
| 144 | */ |
| 145 | private CommonTokenStream getTokens(String fname){ |
| 146 | try { |
| 147 | InputStream is; |
| 148 | FileInputStream fis = new FileInputStream(fname); |
| 149 | if(fname.toLowerCase().endsWith(".gz")){ |
| 150 | is = new GZIPInputStream(fis); |
| 151 | }else{ |
| 152 | is = fis; |
| 153 | } |
| 154 | ANTLRInputStream input = new ANTLRInputStream(is); |
| 155 | FELIXLexer lexer = new FELIXLexer(input); |
| 156 | CommonTokenStream tokens = new CommonTokenStream(lexer); |
| 157 | is.close(); |
| 158 | return tokens; |
| 159 | } catch (Exception e) { |
| 160 | ExceptionMan.handle(e); |
| 161 | } |
| 162 | return null; |
| 163 | } |
| 164 | |
| 165 | } |