repositoryid_1_3.java

java1.6众多例子参考

    /**
     * Creates a repository ID for a normal Java Type.
     * @param clz The Java class to create a repository ID for
     * @exception com.sun.corba.se.impl.io.TypeMismatchException if ser implements the
     * org.omg.CORBA.portable.IDLEntity interface which indicates it is an IDL Value type.
     **/
    public static String createForJavaType(Class clz)
        throws com.sun.corba.se.impl.io.TypeMismatchException
    {
	synchronized (classToRepStr){
	String repid = createForSpecialCase(clz);
	if (repid != null)
	    return repid;

	repid = (String)classToRepStr.get(clz);
	if (repid != null)
	    return repid;

        repid = kValuePrefix + convertToISOLatin1(clz.getName()) +
	    createHashString(clz);

	classToRepStr.put(clz, repid);
	    repStrToClass.put(repid, clz);
        return repid;
    }
    }

    /**
     * Creates a repository ID for an IDL Java Type.
     * @param ser The IDL Value object to create a repository ID for
     * @param major The major version number
     * @param minor The minor version number
     * @exception com.sun.corba.se.impl.io.TypeMismatchException if ser does not implement the
     * org.omg.CORBA.portable.IDLEntity interface which indicates it is an IDL Value type.
     **/
    public static String createForIDLType(Class ser, int major, int minor)
        throws com.sun.corba.se.impl.io.TypeMismatchException
    {
	synchronized (classIDLToRepStr){
	String repid = (String)classIDLToRepStr.get(ser);
	if (repid != null)
	    return repid;

        repid = kIDLPrefix + convertToISOLatin1(ser.getName()).replace('.','/') +
	    ":" + major + "." + minor;
	classIDLToRepStr.put(ser, repid);
	return repid;
    }
    }

    private static String getIdFromHelper(Class clazz){
    	try {
	    Class helperClazz = Utility.loadClassForClass(clazz.getName()+"Helper", null,
                                    clazz.getClassLoader(), clazz, clazz.getClassLoader());
	    Method idMethod = helperClazz.getDeclaredMethod("id", kNoParamTypes);
	    return (String)idMethod.invoke(null, kNoArgs);
    	}
        catch(java.lang.ClassNotFoundException cnfe)
	    {
        	throw new org.omg.CORBA.MARSHAL(cnfe.toString());
	    }
        catch(java.lang.NoSuchMethodException nsme)
	    {
        	throw new org.omg.CORBA.MARSHAL(nsme.toString());
	    }
        catch(java.lang.reflect.InvocationTargetException ite)
	    {
        	throw new org.omg.CORBA.MARSHAL(ite.toString());
	    }
        catch(java.lang.IllegalAccessException iae)
	    {
        	throw new org.omg.CORBA.MARSHAL(iae.toString());
    }
    }

    /**
     * Createa a repository ID for the type if it is either a java type
     * or an IDL type.
     * @param type The type to create rep. id for
     * @return The rep. id.
     **/
    public static String createForAnyType(Class type) {
	try{
	    if (type.isArray())
		return createSequenceRepID(type);
	    else if (IDLEntity.class.isAssignableFrom(type))
		{
		    try{
			return getIdFromHelper(type);
		    }
		    catch(Throwable t) {
			return createForIDLType(type, 1, 0);
		    }
		}
	    else return createForJavaType(type);
	}
	catch(com.sun.corba.se.impl.io.TypeMismatchException e){ 
	    return null; 
	}

    }

    public static boolean isAbstractBase(Class clazz) {
        return (clazz.isInterface() &&
                IDLEntity.class.isAssignableFrom(clazz) &&
                (!ValueBase.class.isAssignableFrom(clazz)) &&
                (!org.omg.CORBA.Object.class.isAssignableFrom(clazz)));

    }

    /**
     * Convert strings with illegal IDL identifier characters.
     * <p>
     * Section 5.5.7 of OBV spec.
     */
    private static String convertToISOLatin1 (String name) {

        int length = name.length();
        if (length == 0) {
            return name;
        }
        StringBuffer buffer = null;

        for (int i = 0; i < length; i++) {

            char c = name.charAt(i);

            if (c > 255 || IDL_IDENTIFIER_CHARS[c] == 0) {
            
                // We gotta convert. Have we already started?

                if (buffer == null) {

                    // No, so get set up...

                    buffer = new StringBuffer(name.substring(0,i));
                }

                // Convert the character into the IDL escape syntax...
                buffer.append(
			      "\\U" +
			      (char)ASCII_HEX[(c & 0xF000) >>> 12] +
			      (char)ASCII_HEX[(c & 0x0F00) >>> 8] +
			      (char)ASCII_HEX[(c & 0x00F0) >>> 4] +
			      (char)ASCII_HEX[(c & 0x000F)]);
        		
            } else {
                if (buffer != null) {
                    buffer.append(c);
                }
            }
    	}
    	
    	if (buffer != null) {
    	    name = buffer.toString();
    	}
 
    	return name;
    }
    
    /**
     * Convert strings with ISO Latin 1 escape sequences back to original strings.
     * <p>
     * Section 5.5.7 of OBV spec.
     */
    private static String convertFromISOLatin1 (String name) {

        int index = -1;
        StringBuffer buf = new StringBuffer(name);

        while ((index = buf.toString().indexOf("\\U")) != -1){
            String str = "0000" + buf.toString().substring(index+2, index+6);

            // Convert Hexadecimal
            byte[] buffer = new byte[(str.length() - 4) / 2];
            for (int i=4, j=0; i < str.length(); i +=2, j++) {
                buffer[j] = (byte)((ORBUtility.hexOf(str.charAt(i)) << 4) & 0xF0);
                buffer[j] |= (byte)((ORBUtility.hexOf(str.charAt(i+1)) << 0) & 0x0F);
            }            
            buf = new StringBuffer(delete(buf.toString(), index, index+6));
            buf.insert(index, (char)buffer[1]);
        }
        
        return buf.toString();


    }

    private static String delete(String str, int from, int to)
    {
        return str.substring(0, from) + str.substring(to, str.length());    
    }

    private static String replace(String target, String arg, String source)
    {
        int i = 0;
        i = target.indexOf(arg);

        while(i != -1)
	    {
		String left = target.substring(0, i);
		String right = target.substring(i+arg.length());
		target = new String(left+source+right);
		i = target.indexOf(arg);
	    }
        return target;
    }

    /*
     * Load a class and check that it is assignable to a given type.
     * @param className the class name.
     * @param remoteCodebase the codebase to use. May be null.
     * @param loader the class loader of last resort. May be null.
     * @param expectedType the expected type. May be null.
     * @return the loaded class.
     */
    private Class loadClassOfType (String className,
                                  String remoteCodebase,
                                  ClassLoader loader,
                                  Class expectedType,
                                  ClassLoader expectedTypeClassLoader)
	throws ClassNotFoundException {
	
	Class loadedClass = null;

	try {
            //Sequence finding of the stubs according to spec
            try{
                //If-else is put here for speed up of J2EE.
                //According to the OMG spec, the if clause is not dead code.
                //It can occur if some compiler has allowed generation
                //into org.omg.stub hierarchy for non-offending
                //classes. This will encourage people to
                //produce non-offending class stubs in their own hierarchy.
                if(!PackagePrefixChecker
                   .hasOffendingPrefix(PackagePrefixChecker
                                       .withoutPackagePrefix(className))){
                    loadedClass = Util.loadClass
                        (PackagePrefixChecker.withoutPackagePrefix(className), 
                         remoteCodebase, 
                         loader);
                } else {
                    loadedClass = Util.loadClass
                        (className, 
                         remoteCodebase, 
                         loader);
                }
            } catch (ClassNotFoundException cnfe) {
                loadedClass = Util.loadClass
                    (className, 
                     remoteCodebase, 
                     loader);
            }
            if (expectedType == null)
	        return loadedClass;
	} catch (ClassNotFoundException cnfe) {
	    if (expectedType == null)
	        throw cnfe;
	}
	
        // If no class was not loaded, or if the loaded class is not of the 
	// correct type, make a further attempt to load the correct class
	// using the classloader of the expected type.
	// _REVISIT_ Is this step necessary, or should the Util,loadClass
	// algorithm always produce a valid class if the setup is correct?
	// Does the OMG standard algorithm need to be changed to include
	// this step?
        if (loadedClass == null || !expectedType.isAssignableFrom(loadedClass)) {
            if (expectedType.getClassLoader() != expectedTypeClassLoader)
                throw new IllegalArgumentException("expectedTypeClassLoader not class loader of expectedType.");

            if (expectedTypeClassLoader != null)
		loadedClass = expectedTypeClassLoader.loadClass(className);
            else
                loadedClass = ORBClassLoader.loadClass(className);
        }

	return loadedClass;
    }

    /**
     * Checks to see if the FullValueDescription should be retrieved.
     * @exception Throws IOException if suids do not match or if the repositoryID
     * is not an RMIValueType
     */
    public static boolean useFullValueDescription(Class clazz, String repositoryID)
        throws IOException{

        String clazzRepIDStr = createForAnyType(clazz);

        if (clazzRepIDStr.equals(repositoryID))
            return false;

        RepositoryId_1_3 targetRepid;
        RepositoryId_1_3 clazzRepid;

        synchronized(cache) {
        // to avoid race condition where multiple threads could be
        // accessing this method, and their access to the cache may
        // be interleaved giving unexpected results

            targetRepid = cache.getId(repositoryID);
            clazzRepid = cache.getId(clazzRepIDStr);
        }

        if ((targetRepid.isRMIValueType()) && (clazzRepid.isRMIValueType())){
            if (!targetRepid.getSerialVersionUID().equals(clazzRepid.getSerialVersionUID())) {

                String mssg = "Mismatched serialization UIDs : Source (Rep. ID" +
                    clazzRepid + ") = " +
                    clazzRepid.getSerialVersionUID() + " whereas Target (Rep. ID " + repositoryID +
                    ") = " + targetRepid.getSerialVersionUID();
                throw new IOException(mssg);
            } else {
                return true;
            }
        } else {

            throw new IOException("The repository ID is not of an RMI value type (Expected ID = " + clazzRepIDStr + "; Received ID = " + repositoryID +")");
        }
    }
}