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1 package org.sapia.soto.state.code;
2
3 import instantj.compile.CompilationFailedException;
4 import instantj.compile.Compiler;
5 import instantj.compile.Source;
6
7 import org.apache.commons.lang.ClassUtils;
8 import org.apache.commons.lang.math.JVMRandom;
9
10 import org.sapia.soto.state.Result;
11 import org.sapia.soto.state.Step;
12
13 import java.io.ByteArrayOutputStream  ;
14 import java.io.PrintStream ;
15
16
17
25 public class JavaStep implements Step {
26 static {
27 System.setProperty("instantj.compile.compiler",
28 "instantj.compile.pizza.PizzaSourceCompiler");
29 }
30
31 private String _name;
32 private Step _inner;
33
34
37 public JavaStep() {
38 }
39
40 public void setName(String name) {
41 _name = name;
42 }
43
44
47 public String getName() {
48 if (_name == null) {
49 return ClassUtils.getShortClassName(getClass());
50 }
51
52 return _name;
53 }
54
55 public void setText(String src) throws Exception {
56 try {
57 Class clazz = generate(src);
58 _inner = (Step) clazz.newInstance();
59 } catch (CompilationFailedException e) {
60 ByteArrayOutputStream bos = new ByteArrayOutputStream ();
61 PrintStream ps = new PrintStream (bos);
62 e.printErrors(ps);
63 ps.flush();
64 ps.close();
65 throw new CompilationFailedException(bos.toString());
66 }
67 }
68
69
72 public void execute(Result st) {
73 if (_inner == null) {
74 throw new IllegalStateException ("Source code not defined");
75 }
76
77 _inner.execute(st);
78 }
79
80 private Class generate(String src) throws Exception {
81 src = "public class Soto_State_Java_" + new JVMRandom().nextLong() +
82 " implements org.sapia.soto.state.Step{" +
83 " public String getName(){ return \"" + getName() + "\"; }" +
84 " public void execute(org.sapia.soto.state.Result result){" + src +
85 " }" + "}";
86
87 return Compiler.compile(new Source(src), true).getType();
88 }
89
90 }
100 |
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