| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu) |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| * |
| * This program 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 for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| package proguard.classfile.util; |
| |
| import proguard.classfile.ClassConstants; |
| |
| |
| /** |
| * An <code>ExternalTypeEnumeration</code> provides an enumeration of all |
| * types listed in a given external descriptor string. The method name can |
| * be retrieved separately. |
| * <p> |
| * A <code>ExternalTypeEnumeration</code> object can be reused for processing |
| * different subsequent descriptors, by means of the <code>setDescriptor</code> |
| * method. |
| * |
| * @author Eric Lafortune |
| */ |
| public class ExternalTypeEnumeration |
| { |
| private String descriptor; |
| private int index; |
| |
| |
| public ExternalTypeEnumeration(String descriptor) |
| { |
| setDescriptor(descriptor); |
| } |
| |
| |
| ExternalTypeEnumeration() |
| { |
| } |
| |
| |
| void setDescriptor(String descriptor) |
| { |
| this.descriptor = descriptor; |
| |
| reset(); |
| } |
| |
| |
| public void reset() |
| { |
| index = descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_OPEN) + 1; |
| |
| if (index < 1) |
| { |
| throw new IllegalArgumentException("Missing opening parenthesis in descriptor ["+descriptor+"]"); |
| } |
| } |
| |
| |
| public boolean hasMoreTypes() |
| { |
| return index < descriptor.length() - 1; |
| } |
| |
| |
| public String nextType() |
| { |
| int startIndex = index; |
| |
| // Find the next separating comma. |
| index = descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_SEPARATOR, |
| startIndex); |
| |
| // Otherwise find the closing parenthesis. |
| if (index < 0) |
| { |
| index = descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_CLOSE, |
| startIndex); |
| if (index < 0) |
| { |
| throw new IllegalArgumentException("Missing closing parenthesis in descriptor ["+descriptor+"]"); |
| } |
| } |
| |
| return descriptor.substring(startIndex, index++).trim(); |
| } |
| |
| |
| public String methodName() |
| { |
| return descriptor.substring(0, descriptor.indexOf(ClassConstants.EXTERNAL_METHOD_ARGUMENTS_OPEN)).trim(); |
| } |
| } |