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| 1 | /* | ||
| 2 | * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.reflect; | ||
| 27 | |||
| 28 | /** Assists in iterating down a method's signature */ | ||
| 29 | |||
| 30 | public class SignatureIterator { | ||
| 31 | private String sig; | ||
| 32 | private int idx; | ||
| 33 | |||
| 34 | public SignatureIterator(String sig) { | ||
| 35 | this.sig = sig; | ||
| 36 | reset(); | ||
| 37 | } | ||
| 38 | |||
| 39 | public void reset() { | ||
| 40 | idx = 1; | ||
| 41 | } | ||
| 42 | |||
| 43 | public boolean atEnd() { | ||
| 44 | return sig.charAt(idx) == ')'; | ||
| 45 | } | ||
| 46 | |||
| 47 | public String next() { | ||
| 48 | if (atEnd()) return null; | ||
| 49 | char c = sig.charAt(idx); | ||
| 50 | if (c != '[' && c != 'L') { | ||
| 51 | ++idx; | ||
| 52 | return new String(new char[] { c }); | ||
| 53 | } | ||
| 54 | // Walk forward to end of entry | ||
| 55 | int endIdx = idx; | ||
| 56 | if (c == '[') { | ||
| 57 | while ((c = sig.charAt(endIdx)) == '[') { | ||
| 58 | endIdx++; | ||
| 59 | } | ||
| 60 | } | ||
| 61 | |||
| 62 | if (c == 'L') { | ||
| 63 | while (sig.charAt(endIdx) != ';') { | ||
| 64 | endIdx++; | ||
| 65 | } | ||
| 66 | } | ||
| 67 | |||
| 68 | int beginIdx = idx; | ||
| 69 | idx = endIdx + 1; | ||
| 70 | return sig.substring(beginIdx, idx); | ||
| 71 | } | ||
| 72 | |||
| 73 | /** Should only be called when atEnd() is true. Does not change | ||
| 74 | state of iterator. */ | ||
| 75 | public String returnType() { | ||
| 76 | if (!atEnd()) { | ||
| 77 | throw new InternalError("Illegal use of SignatureIterator"); | ||
| 78 | } | ||
| 79 | return sig.substring(idx + 1, sig.length()); | ||
| 80 | } | ||
| 81 | } | ||