/* Signature.java -- utility class to compute class and method signatures   Copyright (C) 2005 Free Software FoundationThis file is part of GNU Classpath.GNU Classpath is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe 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, butWITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNUGeneral Public License for more details.You should have received a copy of the GNU General Public Licensealong with GNU Classpath; see the file COPYING.  If not, write to theFree Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA02110-1301 USA.Linking this library statically or dynamically with other modules ismaking a combined work based on this library.  Thus, the terms andconditions of the GNU General Public License cover the wholecombination.As a special exception, the copyright holders of this library give youpermission to link this library with independent modules to produce anexecutable, regardless of the license terms of these independentmodules, and to copy and distribute the resulting executable underterms of your choice, provided that you also meet, for each linkedterms of your choice, provided that you also meet, for each linkedindependent module, the terms and conditions of the license of thatmodule.  An independent module is a module which is not derived fromor based on this library.  If you modify this library, you may extendthis exception to your version of the library, but you are notobligated to do so.  If you do not wish to do so, delete thisexception 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(';');  }}