X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Futil%2FReflection.java;h=327a1ddaf1906f791025a9b6b0471d12edc156d7;hb=7ebc0eeb8a2f49301620c5ba840aff819a672802;hp=5c13668cf5792497f9d91c4cf3e7903d6ec1497f;hpb=45d799349e635f1a99e3974e4504a43d5a7aaf33;p=sbp.git

diff --git a/src/edu/berkeley/sbp/util/Reflection.java b/src/edu/berkeley/sbp/util/Reflection.java
index 5c13668..327a1dd 100644
--- a/src/edu/berkeley/sbp/util/Reflection.java
+++ b/src/edu/berkeley/sbp/util/Reflection.java
@@ -40,6 +40,7 @@ public final class Reflection {
             Object[] ret = (Object[])Array.newInstance(c.getComponentType(), 1);
             ret[0] = o;
             return ret;
+        } else if (c==int.class && o instanceof Number) { return o;
         } else {
             throw new Error("unable to cast " + o + " from " + o.getClass().getName() + " to " + c.getName());
         }
@@ -50,6 +51,33 @@ public final class Reflection {
         return (Object[])Array.newInstance(c, i);
     }
 
+    public static String show(Object o) {
+        if (o==null) return "null";
+        if (o instanceof Show) return ((Show)o).toString();
+        if (! (o instanceof Object[])) return o.toString() + " : " + o.getClass().getName();
+        Object[] arr = (Object[])o;
+        StringBuffer ret = new StringBuffer();
+        ret.append(o.getClass().getComponentType().getName());
+        ret.append("["+arr.length+"]:");
+        for(int i=0; i<arr.length; i++)
+            ret.append(StringUtil.indent("\n"+show(arr[i]), 4));
+        return ret.toString();
+    }
+
+    public static String show(Show o) {
+        StringBuffer ret = new StringBuffer();
+        for(Field f : o.getClass().getFields()) {
+            ret.append("\n" + f.getName() + " = ");
+            try {
+                ret.append(show(f.get(o)));
+            } catch (Exception e) {
+                ret.append("**"+e+"**");
+                throw new RuntimeException(e);
+            }
+        }
+        return o.getClass().getName() + " {" + StringUtil.indent(ret.toString(), 4) + "\n}";
+    }
+
     public static Object lub(Object argo) {
         if (argo instanceof Object[]) return lub((Object[])argo);
         return argo;
@@ -145,6 +173,10 @@ public final class Reflection {
         if ((c.getModifiers() & Modifier.INTERFACE) != 0) return false;
         return true;
     }
+    public static boolean isStatic(Field f) {
+        if ((f.getModifiers() & Modifier.STATIC) != 0) return true;
+        return false;
+    }
 
     public static Field getField(Class c, String s) {
         try {
@@ -152,7 +184,97 @@ public final class Reflection {
                 if (f.getName().equals(s))
                     return f;
         } catch (Exception e) { }
+        if (c.getSuperclass()==null || c.getSuperclass()==c) return null;
+        return getField(c.getSuperclass(), s);
+    }
+    public static Field getField(Class c, int i) {
+        try {
+            for(Field f : c.getDeclaredFields()) {
+                if (isStatic(f)) continue;
+                return f;
+            }
+            if (c.getSuperclass()==null || c.getSuperclass()==c) return null;
+            return getField(c.getSuperclass(), i);
+        } catch (Exception e) { }
         return null;
     }
 
+    public static interface Show {
+    }
+
+    public static Object impose(Class _class, Object[] fields) {
+        try {
+            Object ret = _class.newInstance();
+            Field[] f = _class.getFields();
+            int j = 0;
+            for(int i=0; i<f.length; i++) {
+                Object tgt = Reflection.lub(fields[i]);
+                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));
+                f[i].set(ret, tgt);
+            }
+            return ret;
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static String stringify(Object o) {
+        if (o==null) return "";
+        if (!(o instanceof Object[])) return o.toString();
+        Object[] arr = (Object[])o;
+        StringBuffer ret = new StringBuffer();
+        for(int i=0; i<arr.length; i++)
+            ret.append(arr[i]);
+        return ret.toString();
+    }
+
+    public static Object coerce(Object o, Class c) {
+        if (o==null) return null;
+        if (c.isInstance(o)) return o;
+        if (c == char.class) {
+            return o.toString().charAt(0);
+        }
+
+        if (o.getClass().isArray() &&
+            o.getClass().getComponentType().isArray() &&
+            o.getClass().getComponentType().getComponentType() == String.class &&
+            c.isArray() &&
+            c.getComponentType() == String.class) {
+            String[] ret = new String[((Object[])o).length];
+            for(int i=0; i<ret.length; i++) {
+                StringBuffer sb = new StringBuffer();
+                for(Object ob : (Object[])(((Object[])o)[i]))
+                    sb.append(ob);
+                ret[i] = sb.toString();
+            }
+            return ret;
+        }
+
+        if (c.isArray() && (c.getComponentType().isInstance(o))) {
+            Object[] ret = (Object[])Array.newInstance(c.getComponentType(), 1);
+            ret[0] = o;
+            return ret;
+        }
+
+        if (o.getClass().isArray() && c.isArray()) {
+            boolean ok = true;
+            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]));
+                    ok = false;
+                }
+            }
+            if (ok) {
+                System.err.println("hit with " + c.getComponentType().getName());
+                return Array.newInstance(c.getComponentType(), ((Object[])o).length);
+            }
+        }
+        return o;
+    }
+
 }