1.1 --- a/boot/src/main/java/org/apidesign/html/boot/impl/FnUtils.java	Wed Jun 19 22:29:41 2013 +0200
     1.2 +++ b/boot/src/main/java/org/apidesign/html/boot/impl/FnUtils.java	Tue Jun 25 15:34:37 2013 +0200
     1.3 @@ -20,11 +20,15 @@
     1.4   */
     1.5  package org.apidesign.html.boot.impl;
     1.6  
     1.7 +import java.lang.reflect.Method;
     1.8  import java.net.URL;
     1.9  import java.util.ArrayList;
    1.10  import java.util.Collections;
    1.11  import java.util.Enumeration;
    1.12  import java.util.List;
    1.13 +import java.util.logging.Level;
    1.14 +import java.util.logging.Logger;
    1.15 +import java.util.regex.Pattern;
    1.16  import org.apidesign.html.boot.spi.Fn;
    1.17  
    1.18  /**
    1.19 @@ -66,5 +70,56 @@
    1.20              }
    1.21          };
    1.22      }
    1.23 +
    1.24 +    static String callback(String body, ClassLoader loader) {
    1.25 +        try {
    1.26 +            return callbackImpl(body, loader);
    1.27 +        } catch (ClassNotFoundException ex) {
    1.28 +            throw new IllegalStateException("Can't parse " + body, ex);
    1.29 +        } catch (NoSuchMethodException ex) {
    1.30 +            throw new IllegalStateException("Can't parse " + body, ex);
    1.31 +        }
    1.32 +    }
    1.33 +    
    1.34 +    private static String callbackImpl(String body, ClassLoader loader)
    1.35 +    throws ClassNotFoundException, NoSuchMethodException {
    1.36 +        StringBuilder sb = new StringBuilder();
    1.37 +        int pos = 0;
    1.38 +        for (;;) {
    1.39 +            int next = body.indexOf(".@", pos);
    1.40 +            if (next == -1) {
    1.41 +                sb.append(body.substring(pos));
    1.42 +                return sb.toString();
    1.43 +            }
    1.44 +            sb.append(body.substring(pos, next));
    1.45 +            
    1.46 +            int sigBeg = body.indexOf('(', next);
    1.47 +            int sigEnd = body.indexOf(')', sigBeg);
    1.48 +            
    1.49 +            int colon4 = body.indexOf("::", next);
    1.50 +            
    1.51 +            if (sigBeg == -1 || sigEnd == -1 || colon4 == -1) {
    1.52 +                throw new IllegalStateException("Malformed body " + body);
    1.53 +            }
    1.54 +            
    1.55 +            String fqn = body.substring(next + 2, colon4);
    1.56 +            String method = body.substring(colon4 + 2, sigBeg);
    1.57 +            String params = body.substring(sigBeg + 1, sigEnd);
    1.58 +            
    1.59 +            Class<?> clazz = Class.forName(fqn, false, loader);
    1.60 +            Method m = clazz.getMethod(method);
    1.61 +            
    1.62 +            sb.append("['").append(m.getName()).append("(");
    1.63 +            String sep = "";
    1.64 +            for (Class<?> pt : m.getParameterTypes()) {
    1.65 +                sb.append(sep).append(pt.getName());
    1.66 +                sep = ",";
    1.67 +            }
    1.68 +            sb.append(")']");
    1.69 +            
    1.70 +            pos = sigEnd + 1;
    1.71 +        }
    1.72 +    }
    1.73 +
    1.74      
    1.75  }