_arguments.remove(0); nArgs--;
if (firstArgType instanceof ObjectType) {
_className = ((ObjectType) firstArgType).getJavaClassName();
}
else
throw new TypeCheckError(ErrorMsg.NO_JAVA_FUNCT_THIS_REF, name);
}
}
else if (_className.length() == 0) {
/*
* Warn user if external function could not be resolved.
* Warning will _NOT_ be issued is the call is properly
* wrapped in an <xsl:if> or <xsl:when> element. For details
* see If.parserContents() and When.parserContents()
*/
final Parser parser = getParser();
if (parser != null) {
reportWarning(this, parser, ErrorMsg.FUNCTION_RESOLVE_ERR,
_fname.toString());
}
unresolvedExternal = true;
return _type = Type.Int; // use "Int" as "unknown"
}
}
final Vector methods = findMethods();
if (methods == null) {
// Method not found in this class
throw new TypeCheckError(ErrorMsg.METHOD_NOT_FOUND_ERR, _className + "." + name);
}
Class extType = null;
final int nMethods = methods.size();
final Vector argsType = typeCheckArgs(stable);
// Try all methods to identify the best fit
int bestMethodDistance = Integer.MAX_VALUE;
_type = null; // reset internal type
for (int j, i = 0; i < nMethods; i++) {
// Check if all paramteters to this method can be converted
final Method method = (Method)methods.elementAt(i);
final Class[] paramTypes = method.getParameterTypes();
int currMethodDistance = 0;
for (j = 0; j < nArgs; j++) {
// Convert from internal (translet) type to external (Java) type
extType = paramTypes[j];
final Type intType = (Type)argsType.elementAt(j);
Object match = _internal2Java.maps(intType, extType);
if (match != null) {
currMethodDistance += ((JavaType)match).distance;
}
else {
// no mapping available
//
// Allow a Reference type to match any external (Java) type at
// the moment. The real type checking is performed at runtime.
if (intType instanceof ReferenceType) {
currMethodDistance += 1;
}
else if (intType instanceof ObjectType) {
ObjectType object = (ObjectType)intType;
if (extType.getName().equals(object.getJavaClassName()))
currMethodDistance += 0;
else if (extType.isAssignableFrom(object.getJavaClass()))
currMethodDistance += 1;
else {
currMethodDistance = Integer.MAX_VALUE;
break;
}
}
else {
currMethodDistance = Integer.MAX_VALUE;
break;
}
}
}
if (j == nArgs) {
// Check if the return type can be converted
extType = method.getReturnType();
_type = (Type) _java2Internal.get(extType);
if (_type == null) {
_type = Type.newObjectType(extType);
}
// Use this method if all parameters & return type match
if (_type != null && currMethodDistance < bestMethodDistance) {
_chosenMethod = method;
bestMethodDistance = currMethodDistance;
}
}
}
// It is an error if the chosen method is an instance menthod but we don't
// have a this argument.
if (_chosenMethod != null && _thisArgument == null &&
!Modifier.isStatic(_chosenMethod.getModifiers())) {
throw new TypeCheckError(ErrorMsg.NO_JAVA_FUNCT_THIS_REF, getMethodSignature(argsType));
}
if (_type != null) {
if (_type == Type.NodeSet) {
getXSLTC().setMultiDocument(true);
}
return _type;
}
throw new TypeCheckError(ErrorMsg.ARGUMENT_CONVERSION_ERR, getMethodSignature(argsType));
}