| /* |
| * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.reflect; |
| |
| /** Assists in iterating down a method's signature */ |
| |
| class SignatureIterator { |
| private final String sig; |
| private int idx; |
| |
| public SignatureIterator(String sig) { |
| this.sig = sig; |
| reset(); |
| } |
| |
| public void reset() { |
| idx = 1; |
| } |
| |
| public boolean atEnd() { |
| return sig.charAt(idx) == ')'; |
| } |
| |
| public String next() { |
| if (atEnd()) return null; |
| char c = sig.charAt(idx); |
| if (c != '[' && c != 'L') { |
| ++idx; |
| return new String(new char[] { c }); |
| } |
| // Walk forward to end of entry |
| int endIdx = idx; |
| if (c == '[') { |
| while ((c = sig.charAt(endIdx)) == '[') { |
| endIdx++; |
| } |
| } |
| |
| if (c == 'L') { |
| while (sig.charAt(endIdx) != ';') { |
| endIdx++; |
| } |
| } |
| |
| int beginIdx = idx; |
| idx = endIdx + 1; |
| return sig.substring(beginIdx, idx); |
| } |
| |
| /** Should only be called when atEnd() is true. Does not change |
| state of iterator. */ |
| public String returnType() { |
| if (!atEnd()) { |
| throw new InternalError("Illegal use of SignatureIterator"); |
| } |
| return sig.substring(idx + 1, sig.length()); |
| } |
| } |