More progress on the distributed object stuff.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@19 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/dobj/DEventUtil.java

@@ -0,0 +1,66 @@
+//
+// $Id: DEventUtil.java,v 1.1 2001/06/01 19:56:13 mdb Exp $
+
+package com.threerings.cocktail.cher.dobj;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+
+/**
+ * A repository for distributed object event related utility functions.
+ */
+public class DEventUtil
+{
+    /**
+     * Looks up and returns the method used to set an attribute of the
+     * specified name on an instance of the specified distributed object
+     * class.
+     */
+    public static Method getSetter (Class clazz, String name)
+        throws ObjectAccessException
+    {
+        // first see if it's cached
+        Method setter = (Method)_setterCache.get(name);
+        if (setter != null) {
+            return setter;
+        }
+
+        // convert the attribute name into a setter name
+        String sname = setterName(name);
+        try {
+            // look up that method (we don't have the parameter types, so
+            // we have to do our own name matching)
+            Method[] methods = clazz.getMethods();
+            for (int i = 0; i < methods.length; i++) {
+                if (methods[i].getName().equals(sname)) {
+                    setter = methods[i];
+                    break;
+                }
+            }
+
+        } catch (SecurityException se) {
+            throw new ObjectAccessException("Reflection error: " + se);
+        }
+
+        // make sure we found a matching method
+        if (setter == null) {
+            String errmsg = "No setter for attribute '" + name + "'.";
+            throw new ObjectAccessException(errmsg);
+        }
+
+        // and cache it
+        _setterCache.put(name, setter);
+        return setter;
+    }
+
+    protected static String setterName (String name)
+    {
+        StringBuffer sname = new StringBuffer();
+        sname.append("get");
+        sname.append(Character.toUpperCase(name.charAt(0)));
+        sname.append(name.substring(1));
+        return sname.toString();
+    }
+
+    protected static HashMap _setterCache = new HashMap();
+}