--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/go/trove/classfile/MethodDescriptor.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,203 @@
+/* ====================================================================
+ * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
+ * ====================================================================
+ * The Tea Software License, Version 1.1
+ *
+ * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Walt Disney Internet Group (http://opensource.go.com/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
+ *    not be used to endorse or promote products derived from this
+ *    software without prior written permission. For written
+ *    permission, please contact opensource@dig.com.
+ *
+ * 5. Products derived from this software may not be called "Tea",
+ *    "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
+ *    "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
+ *    written permission of the Walt Disney Internet Group.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * For more information about Tea, please see http://opensource.go.com/.
+ */
+
+package com.go.trove.classfile;
+
+import java.util.List;
+import java.util.ArrayList;
+
+/******************************************************************************
+ * This class is used to build method descriptor strings as 
+ * defined in <i>The Java Virtual Machine Specification</i>, section 4.3.3.
+ * 
+ * @author Brian S O'Neill
+ * @version
+ * <!--$$Revision: 1.1 $-->, <!--$$JustDate:-->  9/07/00 <!-- $-->
+ */
+public class MethodDescriptor extends Descriptor {
+    private static TypeDescriptor[] cEmptyParams = new TypeDescriptor[0];
+
+    private String mStr;
+    private TypeDescriptor mRetType;
+    private TypeDescriptor[] mParams;
+    
+    public MethodDescriptor() {
+        this(null, null);
+    }
+    
+    /** 
+     * Used to construct a method descriptor for a method with a return
+     * type and parameters.
+     */
+    public MethodDescriptor(TypeDescriptor ret, TypeDescriptor[] params) {
+        if (params == null) {
+            params = cEmptyParams;
+        }
+
+        mStr = generate(ret, params);
+        mRetType = ret;
+        mParams = params;
+    }
+
+    public TypeDescriptor getReturnType() {
+        return mRetType;
+    }
+    
+    public int getParameterCount() {
+        return mParams.length;
+    }
+
+    public TypeDescriptor[] getParameterTypes() {
+        return mParams;
+    }
+
+    public String toString() {
+        return mStr;
+    }
+    
+    public static String generate() {
+        return generate(null, null);
+    }
+    
+    /** 
+     * Used to generate a method descriptor for a method with a return
+     * type and parameters.
+     */
+    public static String generate(TypeDescriptor ret, 
+                                  TypeDescriptor[] params) {
+
+        StringBuffer desc = new StringBuffer(20);
+        
+        desc.append('(');
+        
+        if (params != null) {
+            for (int i=0; i<params.length; i++) {
+                desc.append(params[i]);
+            }
+        }
+        
+        desc.append(')');
+        
+        if (ret == null) ret = new TypeDescriptor(Void.TYPE);
+        desc.append(ret);
+        
+        return desc.toString();
+    }
+
+    public static MethodDescriptor parseMethodDesc(String desc) 
+        throws IllegalArgumentException {
+
+        MethodDescriptor md;
+        int cursor = 0;
+        try {
+            char c;
+
+            if ((c = desc.charAt(cursor++)) != '(') {
+                throw new IllegalArgumentException
+                    ("Invalid descriptor: " + desc);
+            }
+
+            StringBuffer buf = new StringBuffer();
+            List list = new ArrayList();
+
+            while ((c = desc.charAt(cursor++)) != ')') {
+                switch (c) {
+                case 'V':
+                case 'I':
+                case 'C':
+                case 'Z':
+                case 'D':
+                case 'F':
+                case 'J':
+                case 'B':
+                case 'S':
+                    buf.append(c);
+                    break;
+                case '[':
+                    buf.append(c);
+                    continue;
+                case 'L':
+                    while (true) {
+                        buf.append(c);
+                        if (c == ';') {
+                            break;
+                        }
+                        c = desc.charAt(cursor++);
+                    }
+                    break;
+                default:
+                    throw new IllegalArgumentException
+                        ("Invalid descriptor: " + desc);
+                }
+
+                list.add(TypeDescriptor.parseTypeDesc(buf.toString()));
+                buf.setLength(0);
+            }
+
+            TypeDescriptor ret = 
+                TypeDescriptor.parseTypeDesc(desc.substring(cursor));
+
+            TypeDescriptor[] tds = new TypeDescriptor[list.size()];
+            tds = (TypeDescriptor[])list.toArray(tds);
+
+            md = new MethodDescriptor(ret, tds);
+        }
+        catch (NullPointerException e) {
+            throw new IllegalArgumentException("Invalid descriptor: " + desc);
+        }
+        catch (IndexOutOfBoundsException e) {
+            throw new IllegalArgumentException("Invalid descriptor: " + desc);
+        }
+
+        return md;
+    }
+}