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SignatureUtils.java

/* *******************************************************************
 * Copyright (c) 2008 Contributors
 * 
 * All rights reserved. 
 * This program and the accompanying materials are made available 
 * under the terms of the Eclipse Public License v1.0 
 * which accompanies this distribution and is available at 
 * http://www.eclipse.org/legal/epl-v10.html 
 *  
 * Contributors: 
 *   Andy Clement - refactored out of MemberImpl
 * ******************************************************************/
package org.aspectj.weaver;

import java.lang.reflect.Modifier;

public class SignatureUtils {

      public static String getSignatureString(Member m, World world) {        
      MemberKind kind = m.getKind();
      if (kind == Member.METHOD) {
            return getMethodSignatureString(m,world);
      } else if (kind == Member.CONSTRUCTOR) {
            return getConstructorSignatureString(m,world);
      } else if (kind == Member.FIELD) {
            return getFieldSignatureString(m,world);
      } else if (kind == Member.HANDLER) {
            return getHandlerSignatureString(m,world);
      } else if (kind == Member.STATIC_INITIALIZATION) {
            return getStaticInitializationSignatureString(m,world);
      } else if (kind == Member.ADVICE) {
            return getAdviceSignatureString(m,world);
      } else if (kind == Member.MONITORENTER || kind == Member.MONITOREXIT) {
            return getMonitorSignatureString(m,world);
      } else {
            throw new BCException("Do not know the signature string for MemberKind "+kind);
      }
    }

    public static String getSignatureMakerName(Member m) {
      MemberKind kind = m.getKind();
      if (kind == Member.METHOD) {
            return "makeMethodSig";
      } else if (kind == Member.CONSTRUCTOR) {
            return "makeConstructorSig";
      } else if (kind == Member.FIELD) {
            return "makeFieldSig";
      } else if (kind == Member.HANDLER) {
            return "makeCatchClauseSig";
      } else if (kind == Member.STATIC_INITIALIZATION) {
            return "makeInitializerSig";
      } else if (kind == Member.ADVICE) {
            return "makeAdviceSig";
      } else if (kind == Member.MONITORENTER) {
            return "makeLockSig";
      } else if (kind == Member.MONITOREXIT) {
            return "makeUnlockSig";
      } else {
            throw new BCException("Do not know the signature maker name for MemberKind "+kind);
      }
    }

      public static String getSignatureType(Member m) {
      MemberKind kind = m.getKind();
      if (m.getName().equals("<clinit>") && kind!=Member.STATIC_INITIALIZATION) throw new BCException();
//          if (m.getName().equals("<clinit>")) return "org.aspectj.lang.reflect.InitializerSignature";
      
      if (kind == Member.METHOD) {
            return "org.aspectj.lang.reflect.MethodSignature";
      } else if (kind == Member.CONSTRUCTOR) {
            return "org.aspectj.lang.reflect.ConstructorSignature";
      } else if (kind == Member.FIELD) {
            return "org.aspectj.lang.reflect.FieldSignature";
      } else if (kind == Member.HANDLER) {
            return "org.aspectj.lang.reflect.CatchClauseSignature";
      } else if (kind == Member.STATIC_INITIALIZATION) {
            return "org.aspectj.lang.reflect.InitializerSignature";
      } else if (kind == Member.ADVICE) {
            return "org.aspectj.lang.reflect.AdviceSignature";
      } else if (kind == Member.MONITORENTER) {
            return "org.aspectj.lang.reflect.LockSignature";
      } else if (kind == Member.MONITOREXIT) {
            return "org.aspectj.lang.reflect.UnlockSignature";
      } else {
            throw new BCException("Do not know the signature type for MemberKind "+kind);
      }
    }

    
    // ---
      

      private static String getHandlerSignatureString(Member m, World world) {
        StringBuffer buf = new StringBuffer();
        buf.append(makeString(0));
        buf.append('-');
        //buf.append(getName());
        buf.append('-');
        buf.append(makeString(m.getDeclaringType()));
        buf.append('-');
        buf.append(makeString(m.getParameterTypes()[0]));
        buf.append('-');
        String pName = "<missing>";
        String[] names = m.getParameterNames(world);
        if (names != null) pName = names[0];
        buf.append(pName);
        buf.append('-');
        return buf.toString();
      }
      
      private static String getStaticInitializationSignatureString(Member m, World world) {
        StringBuffer buf = new StringBuffer();
        buf.append(makeString(m.getModifiers(world)));
        buf.append('-');
        //buf.append(getName());
        buf.append('-');
        buf.append(makeString(m.getDeclaringType()));
        buf.append('-');
        return buf.toString();
      }

      protected static String getAdviceSignatureString(Member m, World world) {
        StringBuffer buf = new StringBuffer();
        buf.append(makeString(m.getModifiers(world)));
        buf.append('-');
        buf.append(m.getName());
        buf.append('-');
        buf.append(makeString(m.getDeclaringType()));
        buf.append('-');
        buf.append(makeString(m.getParameterTypes()));
        buf.append('-');
        buf.append(makeString(m.getParameterNames(world)));
        buf.append('-');
        buf.append(makeString(m.getExceptions(world)));
        buf.append('-');
        buf.append(makeString(m.getReturnType()));
        buf.append('-');
        return buf.toString();
      }


      protected static String getMethodSignatureString(Member m, World world) {
        StringBuffer buf = new StringBuffer();
        buf.append(makeString(m.getModifiers(world)));
        buf.append('-');
        buf.append(m.getName());
        buf.append('-');
        buf.append(makeString(m.getDeclaringType()));
        buf.append('-');
        buf.append(makeString(m.getParameterTypes()));
        buf.append('-');
        buf.append(makeString(m.getParameterNames(world)));
        buf.append('-');
        buf.append(makeString(m.getExceptions(world)));
        buf.append('-');
        buf.append(makeString(m.getReturnType()));
        buf.append('-');
        return buf.toString();
      }
      
      protected static String getMonitorSignatureString(Member m, World world) {
        StringBuffer buf = new StringBuffer();
        buf.append(makeString(Modifier.STATIC));    // modifiers
        buf.append('-');
        buf.append(m.getName());                      // name
        buf.append('-');
        buf.append(makeString(m.getDeclaringType())); // Declaring Type
        buf.append('-');
        buf.append(makeString(m.getParameterTypes()[0])); // Parameter Types
        buf.append('-');
        buf.append("");                                 // Parameter names
        buf.append('-');
        return buf.toString();
      }

      protected static String getConstructorSignatureString(Member m, World world) {
        StringBuffer buf = new StringBuffer();
        buf.append(makeString(m.getModifiers(world)));
        buf.append('-');
        buf.append('-');
        buf.append(makeString(m.getDeclaringType()));
        buf.append('-');
        buf.append(makeString(m.getParameterTypes()));
        buf.append('-');
        buf.append(makeString(m.getParameterNames(world)));
        buf.append('-');
        buf.append(makeString(m.getExceptions(world)));
        buf.append('-');
        return buf.toString();
    }
      
      


      protected static String getFieldSignatureString(Member m, World world) {
        StringBuffer buf = new StringBuffer();
        buf.append(makeString(m.getModifiers(world)));
        buf.append('-');
        buf.append(m.getName());
        buf.append('-');
        buf.append(makeString(m.getDeclaringType()));
        buf.append('-');
        buf.append(makeString(m.getReturnType()));
        buf.append('-');
        return buf.toString();
    }

      protected static String makeString(int i) {
            return Integer.toString(i, 16);
      }

      protected static String makeString(UnresolvedType t) {
      // this is the inverse of the odd behavior for Class.forName w/ arrays
      if (t.isArray()) {
            // this behavior matches the string used by the eclipse compiler for Foo.class literals
            return t.getSignature().replace('/', '.');
      } else {
            return t.getName();
      }
    }
    


      protected static String makeString(UnresolvedType[] types) {
      if (types == null) return "";
        StringBuffer buf = new StringBuffer();
        for (int i = 0, len=types.length; i < len; i++) {
            buf.append(makeString(types[i]));
            buf.append(':');
        }
        return buf.toString();
    }
    


      protected static String makeString(String[] names) {
      if (names == null) return "";
        StringBuffer buf = new StringBuffer();
        for (int i = 0, len=names.length; i < len; i++) {
            buf.append(names[i]);
            buf.append(':');
        }
        return buf.toString();
    }

}

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