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/*
* 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 sun.reflect;
/** Assists in iterating down a method's signature */
public 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());
}
}
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