| /* Signature.java -- utility class to compute class and method signatures |
| Copyright (C) 2005 Free Software Foundation |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.classpath.jdwp.util; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| |
| /** |
| * A class to compute class and method signatures. |
| * |
| * @author Tom Tromey (tromey@redhat.com) |
| * @author Keith Seitz (keiths@redhat.com) |
| */ |
| public class Signature |
| { |
| /** |
| * Computes the class signature, i.e., java.lang.String.class |
| * returns "Ljava/lang/String;". |
| * |
| * @param theClass the class for which to compute the signature |
| * @return the class's type signature |
| */ |
| public static String computeClassSignature (Class theClass) |
| { |
| StringBuffer sb = new StringBuffer (); |
| _addToSignature (sb, theClass); |
| return sb.toString (); |
| } |
| |
| /** |
| * Computes the field signature which is just the class signature of the |
| * field's type, ie a Field of type java.lang.String this will return |
| * "Ljava/lang/String;". |
| * |
| * @param field the field for which to compute the signature |
| * @return the field's type signature |
| */ |
| public static String computeFieldSignature (Field field) |
| { |
| return computeClassSignature (field.getType()); |
| } |
| |
| /** |
| * Computes the method signature, i.e., java.lang.String.split (String, int) |
| * returns "(Ljava/lang/String;I)[Ljava/lang/String;" |
| * |
| * @param method the method for which to compute the signature |
| * @return the method's type signature |
| */ |
| public static String computeMethodSignature (Method method) |
| { |
| return _computeSignature (method.getReturnType (), |
| method.getParameterTypes ()); |
| } |
| |
| private static String _computeSignature (Class returnType, |
| Class[] paramTypes) |
| { |
| StringBuffer sb = new StringBuffer ("("); |
| if (paramTypes != null) |
| { |
| for (int i = 0; i < paramTypes.length; ++i) |
| _addToSignature (sb, paramTypes[i]); |
| } |
| sb.append (")"); |
| _addToSignature (sb, returnType); |
| return sb.toString(); |
| } |
| |
| private static void _addToSignature (StringBuffer sb, Class k) |
| { |
| // For some reason there's no easy way to get the signature of a |
| // class. |
| if (k.isPrimitive ()) |
| { |
| if (k == void.class) |
| sb.append('V'); |
| else if (k == boolean.class) |
| sb.append('Z'); |
| else if (k == byte.class) |
| sb.append('B'); |
| else if (k == char.class) |
| sb.append('C'); |
| else if (k == short.class) |
| sb.append('S'); |
| else if (k == int.class) |
| sb.append('I'); |
| else if (k == float.class) |
| sb.append('F'); |
| else if (k == double.class) |
| sb.append('D'); |
| else if (k == long.class) |
| sb.append('J'); |
| return; |
| } |
| |
| String name = k.getName (); |
| int len = name.length (); |
| sb.ensureCapacity (len); |
| if (! k.isArray ()) |
| sb.append('L'); |
| for (int i = 0; i < len; ++i) |
| { |
| char c = name.charAt (i); |
| if (c == '.') |
| c = '/'; |
| sb.append (c); |
| } |
| if (! k.isArray ()) |
| sb.append(';'); |
| } |
| } |