### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/BinaryMethod.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/BinaryMethod.java,v
retrieving revision 1.66
diff -u -r1.66 BinaryMethod.java
--- model/org/eclipse/jdt/internal/core/BinaryMethod.java	10 Nov 2005 15:25:25 -0000	1.66
+++ model/org/eclipse/jdt/internal/core/BinaryMethod.java	10 Nov 2005 15:33:20 -0000
@@ -11,6 +11,8 @@
 package org.eclipse.jdt.internal.core;
 
 import java.net.URL;
+import java.util.ArrayList;
+import java.util.StringTokenizer;
 
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.OperationCanceledException;
@@ -192,10 +194,44 @@
 				}
 			}
 		}
+		IBinaryMethod info = (IBinaryMethod) getElementInfo();
+		final int paramCount = Signature.getParameterCount(new String(info.getMethodDescriptor()));
+		if (this.parameterNames == null) {
+			// try to see if we can retrieve the names from the attached javadoc
+			if (paramCount != 0) {
+				String javadoc = this.getAttachedJavadoc(null, "UTF-8"); //$NON-NLS-1$
+				if (javadoc != null) {
+					final int indexOfOpenParen = javadoc.indexOf('(');
+					if (indexOfOpenParen != -1) {
+						final int indexOfClosingParen = javadoc.indexOf(')', indexOfOpenParen);
+						if (indexOfClosingParen != -1) {
+							final char[] paramsSource =
+								CharOperation.replace(
+									javadoc.substring(indexOfOpenParen + 1, indexOfClosingParen).toCharArray(),
+									" ".toCharArray(), //$NON-NLS-1$
+									new char[] {' '});
+							final StringTokenizer tokenizer = new StringTokenizer(String.valueOf(paramsSource), ", \n\r"); //$NON-NLS-1$
+							int index = 0;
+							final ArrayList paramNames = new ArrayList(paramCount);
+							while (tokenizer.hasMoreTokens()) {
+								final String token = tokenizer.nextToken();
+								if ((index & 1) != 0) {
+									// if odd then this is a parameter name
+									paramNames.add(token);
+								}
+								index++;
+							}
+							if (!paramNames.isEmpty()) {
+								this.parameterNames = new String[paramNames.size()];
+								paramNames.toArray(this.parameterNames);
+							}
+	 					}
+					}
+				}
+			}
+		}
 		// if still no parameter names, produce fake ones
 		if (this.parameterNames == null) {
-			IBinaryMethod info = (IBinaryMethod) getElementInfo();
-			int paramCount = Signature.getParameterCount(new String(info.getMethodDescriptor()));
 			this.parameterNames = new String[paramCount];
 			for (int i = 0; i < paramCount; i++) {
 				this.parameterNames[i] = "arg" + i; //$NON-NLS-1$
Index: model/org/eclipse/jdt/core/IMethod.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/core/IMethod.java,v
retrieving revision 1.22
diff -u -r1.22 IMethod.java
--- model/org/eclipse/jdt/core/IMethod.java	25 May 2005 16:39:44 -0000	1.22
+++ model/org/eclipse/jdt/core/IMethod.java	10 Nov 2005 15:33:20 -0000
@@ -99,8 +99,8 @@
 String getKey();
 /**
  * Returns the names of parameters in this method.
- * For binary types, these names are invented as "arg"+i, where i starts at 1 
- * (even if source is associated with the binary).
+ * For binary types, associated source or attached javadoc are used to retrieve the names.
+ * If none can be retrieve, then these names are invented as "arg"+i, where i starts at 1.
  * Returns an empty array if this method has no parameters.
  *
  * <p>For example, a method declared as <code>public void foo(String text, int length)</code>