/**
* Initializes me with my domain, context, variables, and expression.
*
* @param delegateDomain my domain
* @param context my context
* @param parameters name and types of variables used in my expression
* @param expression the expression that I handle
* @throws ParserException if the expression is invalid
*/
public OCLQueryDelegate(
@NonNull OCLDelegateDomain delegateDomain,
@NonNull EClassifier context,
@Nullable Map<String, EClassifier> parameters,
@NonNull String expression) {
this.delegateDomain = delegateDomain;
this.parserContext =
new EInvocationContext(
delegateDomain.getOCL().getEnvironmentFactory(), null, context, parameters);
this.expression = expression;
}
/**
* Executes the query for the specified <tt>target</tt> object. The result is the OCL evaluation
* result which may be a Number, String, Collection or other object for normal returns or a
* NullLiteralExp for null, or an InvalidLiteralExp for invalid.
*
* @param target the object on which to execute the query; this must be an instance of the context
* with which the delegate was created
* @param arguments a map of variable names to values; these must correspond to the variables with
* which the delegate was created
* @return the query's result
* @throws InvocationTargetException in case of failure to prepare or execute the query, usually
* because of an exception
*/
@Override
public Object execute(@Nullable Object target, Map<String, ?> arguments)
throws InvocationTargetException {
@SuppressWarnings("null")
@NonNull
Map<String, ?> nonNullArguments =
(arguments != null ? arguments : (Map<String, ?>) Collections.<String, Object>emptyMap());
try {
if (specification == null) {
prepare();
}
@SuppressWarnings("null")
@NonNull
ExpressionInOCL nonNullSpecification = specification;
OCL ocl = delegateDomain.getOCL();
IdResolver idResolver = ocl.getIdResolver();
Object targetValue = idResolver.boxedValueOf(target);
org.eclipse.ocl.pivot.Class targetType = idResolver.getStaticTypeOf(targetValue);
Type requiredType = nonNullSpecification.getOwnedContext().getType();
if ((requiredType == null)
|| !targetType.conformsTo(ocl.getStandardLibrary(), requiredType)) {
String message =
StringUtil.bind(
PivotMessagesInternal.WrongContextClassifier_ERROR_, targetType, requiredType);
throw new OCLDelegateException(new SemanticException(message));
}
List<Variable> parameterVariables = nonNullSpecification.getOwnedParameters();
int argCount = arguments != null ? arguments.size() : 0;
if (parameterVariables.size() != argCount) {
String message =
StringUtil.bind(
PivotMessagesInternal.MismatchedArgumentCount_ERROR_,
argCount,
parameterVariables.size());
throw new OCLDelegateException(new SemanticException(message));
}
Query query = ocl.createQuery(nonNullSpecification);
EvaluationEnvironment env = query.getEvaluationEnvironment(target);
for (Variable parameterVariable : parameterVariables) {
// bind arguments to parameter names
String name = parameterVariable.getName();
Object object = nonNullArguments.get(name);
if ((object == null) && !nonNullArguments.containsKey(name)) {
String message =
StringUtil.bind(
PivotMessagesInternal.EvaluationResultIsInvalid_ERROR_,
nonNullSpecification.getBody());
throw new OCLDelegateException(new SemanticException(message));
}
Object value = idResolver.boxedValueOf(object);
targetType = idResolver.getStaticTypeOf(value);
requiredType = ClassUtil.nonNullModel(parameterVariable.getType());
if (!targetType.conformsTo(ocl.getStandardLibrary(), requiredType)) {
String message =
StringUtil.bind(
PivotMessagesInternal.MismatchedArgumentType_ERROR_,
name,
targetType,
requiredType);
throw new OCLDelegateException(new SemanticException(message));
}
env.add(parameterVariable, value);
}
Object result = evaluate(query, target);
// if (result.isInvalid()) {
// String message = ClassUtil.bind(OCLMessages.EvaluationResultIsInvalid_ERROR_,
// getOperationName());
// throw new OCLDelegateException(message);
// }
// if ((result == null) / * || ocl.isInvalid(result) * /) {
// String message = ClassUtil.bind(OCLMessages.EvaluationResultIsNull_ERROR_,
// getOperationName());
// throw new OCLDelegateException(message);
// }
// return converter.convert(ocl, result);
// if (result == null) {
// String message = NLS.bind(OCLMessages.EvaluationResultIsInvalid_ERROR_,
// PivotUtil.getBody(specification));
// throw new InvocationTargetException(new OCLDelegateException(message));
// }
return idResolver.ecoreValueOf(null, result);
} catch (InvocationTargetException e) {
throw e;
} catch (EvaluationException e) {
String message =
StringUtil.bind(
PivotMessagesInternal.EvaluationResultIsInvalid_ERROR_, specification.getBody());
throw new InvocationTargetException(new EvaluationException(message));
} catch (WrappedException e) {
throw new InvocationTargetException(e.getCause());
} catch (Exception e) {
throw new InvocationTargetException(e);
}
}