checkpoint

darcs-hash:20060705014912-5007d-c0abbf76e5fb71735dbf18bcbf804a42598780ce.gz

diff --git a/src/edu/berkeley/sbp/misc/Demo.java b/src/edu/berkeley/sbp/misc/Demo.java
index 359f715..140af81 100644 (file)
--- a/src/edu/berkeley/sbp/misc/Demo.java
+++ b/src/edu/berkeley/sbp/misc/Demo.java
@@ -184,6 +184,10 @@ public class Demo {
         public abstract tag getTag();
         public abstract nonterminal getNonTerminal();
         public abstract int[] buildSequence(Production p);
+
+        private Reflection.Bindable _bindable;
+        public Target(Reflection.Bindable b) { this._bindable = b; }
+
         public boolean isCompatible(Production p) {
             tag t = getTag();
             if (t != null &&
@@ -262,7 +266,7 @@ public class Demo {
 
     public static class TargetClass extends Target {
         public final Class _class;
-        public TargetClass(Class _class) { this._class = _class; }
+        public TargetClass(Class _class) { super(Reflection.Bindable.create(_class)); this._class = _class; }
         public String getName() { return _class.getSimpleName(); }
         public tag getTag() { return (tag)_class.getAnnotation(tag.class); }
         public nonterminal getNonTerminal() { return (nonterminal)_class.getAnnotation(nonterminal.class); }
@@ -290,7 +294,7 @@ public class Demo {
 
     public static class TargetConstructor extends Target {
         public final Constructor _ctor;
-        public TargetConstructor(Constructor _ctor) { this._ctor = _ctor; }
+        public TargetConstructor(Constructor _ctor) { super(Reflection.Bindable.create(_ctor)); this._ctor = _ctor; }
         public String getName() { return _ctor.getName(); }
         public tag getTag() { return (tag)_ctor.getAnnotation(tag.class); }
         public nonterminal getNonTerminal() { return (nonterminal)_ctor.getAnnotation(nonterminal.class); }
@@ -315,27 +319,12 @@ public class Demo {
             return buildSequence(p, names, argtags);
         }
         public Object plant(Object[] fields) {
-            try {
-                Class[] argTypes = _ctor.getParameterTypes();
-                Object[] args = new Object[argTypes.length];
-                int j = 0;
-                for(int i=0; i<args.length; i++) {
-                    Object tgt = Reflection.lub(fields[i]);
-                    if (argTypes[i] == String.class) tgt = Reflection.stringify(tgt);
-                    // FUGLY
-                    tgt = Reflection.coerce(tgt, argTypes[i]);
-                    System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
-                    args[i] = tgt;
-                }
-                return _ctor.newInstance(args);
-            } catch (Exception e) {
-                throw new RuntimeException(e);
-            }
+            return Reflection.impose(_ctor, fields);
         }
     }
     public static class TargetMethod extends Target {
         public final Method _method;
-        public TargetMethod(Method _method) { this._method = _method; }
+        public TargetMethod(Method _method) { super(Reflection.Bindable.create(_method)); this._method = _method; }
         public String getName() { return _method.getName(); }
         public String toString() { return _method.getName(); }
         public tag getTag() { return (tag)_method.getAnnotation(tag.class); }
@@ -353,31 +342,12 @@ public class Demo {
         }
         public boolean isRaw() { return _method.isAnnotationPresent(raw.class); }
         public Object invokeRaw(Iterable<Tree<Object>> t) {
-            try {
-                return _method.invoke(null, new Object[] { t });
-            } catch (Exception e) {
-                throw new RuntimeException(e);
-            }
+            return Reflection.impose(_method, new Object[] { t });
         }
         public Object plant(Object[] fields) {
-            try {
-                Class[] argTypes = _method.getParameterTypes();
-                Object[] args = new Object[argTypes.length];
-                int j = 0;
-                for(int i=0; i<args.length; i++) {
-                    Object tgt = Reflection.lub(fields[i]);
-                    if (argTypes[i] == String.class) tgt = Reflection.stringify(tgt);
-                    // FUGLY
-                    tgt = Reflection.coerce(tgt, argTypes[i]);
-                    System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
-                    args[i] = tgt;
-                }
-                System.err.println("invoking " + _method + " with " + Reflection.show(args));
-                return _method.invoke(null, args);
-            } catch (Exception e) {
-                throw new RuntimeException(e);
-            }
+            return Reflection.impose(_method, fields);
         }
+        
     }
 
     public static Union cached = null;

diff --git a/src/edu/berkeley/sbp/util/Reflection.java b/src/edu/berkeley/sbp/util/Reflection.java
index 327a1dd..de52785 100644 (file)
--- a/src/edu/berkeley/sbp/util/Reflection.java
+++ b/src/edu/berkeley/sbp/util/Reflection.java
@@ -1,6 +1,7 @@
 package edu.berkeley.sbp.util;
 import java.io.*;
 import java.lang.reflect.*;
+import java.lang.annotation.*;
 
 /** Random reflection-related utilities */
 public final class Reflection {
@@ -202,6 +203,12 @@ public final class Reflection {
     public static interface Show {
     }
 
+    public static Object impose(Object o, Object[] fields) {
+        if (o instanceof Class) return impose((Class)o, fields);
+        if (o instanceof Method) return impose((Method)o, fields);
+        if (o instanceof Constructor) return impose((Constructor)o, fields);
+        return null;
+    }
     public static Object impose(Class _class, Object[] fields) {
         try {
             Object ret = _class.newInstance();
@@ -222,6 +229,45 @@ public final class Reflection {
         }
     }
 
+    public static Object impose(Method _method, Object[] fields) {
+        try {
+            Class[] argTypes = _method.getParameterTypes();
+            Object[] args = new Object[argTypes.length];
+            int j = 0;
+            for(int i=0; i<args.length; i++) {
+                Object tgt = Reflection.lub(fields[i]);
+                if (argTypes[i] == String.class) tgt = Reflection.stringify(tgt);
+                // FUGLY
+                tgt = Reflection.coerce(tgt, argTypes[i]);
+                System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
+                args[i] = tgt;
+            }
+            System.err.println("invoking " + _method + " with " + Reflection.show(args));
+            return _method.invoke(null, args);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static Object impose(Constructor _ctor, Object[] fields) {
+        try {
+            Class[] argTypes = _ctor.getParameterTypes();
+            Object[] args = new Object[argTypes.length];
+            int j = 0;
+            for(int i=0; i<args.length; i++) {
+                Object tgt = Reflection.lub(fields[i]);
+                if (argTypes[i] == String.class) tgt = Reflection.stringify(tgt);
+                // FUGLY
+                tgt = Reflection.coerce(tgt, argTypes[i]);
+                System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
+                args[i] = tgt;
+            }
+            return _ctor.newInstance(args);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
     public static String stringify(Object o) {
         if (o==null) return "";
         if (!(o instanceof Object[])) return o.toString();
@@ -277,4 +323,39 @@ public final class Reflection {
         return o;
     }
 
+    public static abstract class Bindable {
+        public abstract String getSimpleName();
+        public abstract String toString();
+        public abstract <A extends Annotation> A getAnnotation(Class<A> c);
+        public boolean isAnnotationPresent(Class<? extends Annotation> c) { return getAnnotation(c) != null; }
+        public static Bindable create(Object o) {
+            if (o instanceof Class) return new BindableClass((Class)o);
+            if (o instanceof Method) return new BindableMethod((Method)o);
+            if (o instanceof Constructor) return new BindableConstructor((Constructor)o);
+            return null;
+        }
+    }
+
+    private static class BindableMethod extends Bindable {
+        private final Method _method;
+        public String toString() { return "BindableMethod["+_method+"]"; }
+        public BindableMethod(Method _method) { this._method = _method; }
+        public String getSimpleName() { return _method.getName(); }
+        public <A extends Annotation> A getAnnotation(Class<A> c) { return _method.getAnnotation(c); }
+    }
+    private static class BindableConstructor extends Bindable {
+        private final Constructor _constructor;
+        public String toString() { return "BindableConstructor["+_constructor+"]"; }
+        public BindableConstructor(Constructor _constructor) { this._constructor = _constructor; }
+        public String getSimpleName() { return _constructor.getName(); }
+        public <A extends Annotation> A getAnnotation(Class<A> c) { return _constructor.getAnnotation(c); }
+    }
+    private static class BindableClass extends Bindable {
+        private final Class _class;
+        public String toString() { return "BindableClass["+_class+"]"; }
+        public BindableClass(Class _class) { this._class = _class; }
+        public String getSimpleName() { return _class.getSimpleName(); }
+        public <A extends Annotation> A getAnnotation(Class<A> c) { return (A)_class.getAnnotation(c); }
+    }
+
 }