checkpoint

[sbp.git] / src / edu / berkeley / sbp / util / Reflection.java

diff --git a/src/edu/berkeley/sbp/util/Reflection.java b/src/edu/berkeley/sbp/util/Reflection.java
index 327a1dd..2cc7b0a 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 {
@@ -53,7 +54,7 @@ public final class Reflection {
 
     public static String show(Object o) {
         if (o==null) return "null";
-        if (o instanceof Show) return ((Show)o).toString();
+        if (o instanceof Show) return show((Show)o);
         if (! (o instanceof Object[])) return o.toString() + " : " + o.getClass().getName();
         Object[] arr = (Object[])o;
         StringBuffer ret = new StringBuffer();
@@ -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();
@@ -212,7 +219,7 @@ public final class Reflection {
                 if (f[i].getType() == String.class) tgt = stringify(tgt);
                 // FUGLY
                 tgt = coerce(tgt, f[i].getType());
-                System.err.println("setting a " + f[i].getType().getName() + " to " + Reflection.show(tgt));
+                //System.err.println("setting a " + f[i].getType().getName() + " to " + Reflection.show(tgt));
                 f[i].set(ret, tgt);
             }
             return ret;
@@ -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();
@@ -238,6 +284,10 @@ public final class Reflection {
         if (c == char.class) {
             return o.toString().charAt(0);
         }
+        if (c==int.class || c==Integer.class) {
+            String s = (String)coerce(o, String.class);
+            return new Integer(Integer.parseInt(s));
+        }
 
         if (o.getClass().isArray() &&
             o.getClass().getComponentType().isArray() &&
@@ -265,12 +315,12 @@ public final class Reflection {
             for(int i=0; i<((Object[])o).length; i++) {
                 Object ob = (((Object[])o)[i]);
                 if (ob != null) {
-                    System.err.println("no hit with " + c.getComponentType().getName() + " on " + Reflection.show(((Object[])o)[i]));
+                    //System.err.println("no hit with " + c.getComponentType().getName() + " on " + Reflection.show(((Object[])o)[i]));
                     ok = false;
                 }
             }
             if (ok) {
-                System.err.println("hit with " + c.getComponentType().getName());
+                //System.err.println("hit with " + c.getComponentType().getName());
                 return Array.newInstance(c.getComponentType(), ((Object[])o).length);
             }
         }