| 1 | package felix.io; |
| 2 | |
| 3 | import java.util.Arrays; |
| 4 | |
| 5 | import org.python.core.PyCode; |
| 6 | import org.python.core.PyInteger; |
| 7 | import org.python.core.PyObject; |
| 8 | import org.python.util.PythonInterpreter; |
| 9 | |
| 10 | /** |
| 11 | * Class for executing python code (using Jython). |
| 12 | * @author Ce Zhang |
| 13 | * |
| 14 | */ |
| 15 | public class PythonExecutor { |
| 16 | |
| 17 | /** |
| 18 | * pycode |
| 19 | */ |
| 20 | PyCode pycode; |
| 21 | |
| 22 | /** |
| 23 | * python interpreter |
| 24 | */ |
| 25 | PythonInterpreter interp; |
| 26 | |
| 27 | /** |
| 28 | * Prepares given script for execution. |
| 29 | * @param script |
| 30 | */ |
| 31 | public void prepare(String script){ |
| 32 | interp = new PythonInterpreter(); |
| 33 | pycode = interp.compile(script); |
| 34 | |
| 35 | interp.exec("def felixio_push(*columns):\n" + |
| 36 | "\tif(len(columns) == 0):\n"+ |
| 37 | "\t\t_felix_donotusemyname_outkey.append('')\n" + |
| 38 | "\telse:\n" + |
| 39 | "\t\t_felix_donotusemyname_outkey.append(columns[0].replace('\\\\','\\\\\\\\').replace('\\t','\\\\t').replace('\\n', '\\\\n').replace('\\r', '\\\\r'))\n" + |
| 40 | "\t_felix_donotusemyname_outvalue.append('\t'.join(i.__str__().replace('\\\\','\\\\\\\\').replace('\\t','\\\\t').replace('\\n', '\\\\n').replace('\\r', '\\\\r') for i in columns[1:]))\n"); |
| 41 | |
| 42 | interp.exec("def felixio_collect(k, v):\n" + |
| 43 | "\t_felix_donotusemyname_outkey.append(k)\n"+ |
| 44 | "\t_felix_donotusemyname_outvalue.append(v)"); |
| 45 | |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Returns given variable. |
| 50 | * @param variable |
| 51 | * @return |
| 52 | */ |
| 53 | public PyObject get(String variable){ |
| 54 | return interp.get(variable); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Sets given variable. |
| 59 | * @param name |
| 60 | * @param value |
| 61 | */ |
| 62 | public void set(String name, PyObject value){ |
| 63 | interp.set(name, value); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Execuates given script. |
| 68 | * @param script |
| 69 | */ |
| 70 | public void execSingle(String script){ |
| 71 | interp.exec(script); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * The constructor. |
| 76 | */ |
| 77 | public PythonExecutor(){ |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * The constructor with script. |
| 82 | * @param script |
| 83 | */ |
| 84 | public PythonExecutor(String script){ |
| 85 | this.prepare(script); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Excecutes python script. |
| 90 | */ |
| 91 | public void run(){ |
| 92 | |
| 93 | interp.exec(pycode); |
| 94 | |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Main test method. |
| 99 | * @param args |
| 100 | * @throws Exception |
| 101 | */ |
| 102 | /* |
| 103 | public static void main(String[] args) throws Exception{ |
| 104 | |
| 105 | PythonExecutor pe = new PythonExecutor(); |
| 106 | pe.prepare("print sys"); |
| 107 | |
| 108 | pe.execSingle("import sys"); |
| 109 | |
| 110 | for(int i=0;i<10000;i++){ |
| 111 | pe.run(); |
| 112 | } |
| 113 | } |
| 114 | */ |
| 115 | |
| 116 | } |