Is it right way for handling exceptions using Apache ExceptionUtils.getRootCause?
Is it possible, that below condition in "My code" will be fulfilled(true)? I belive that no, beacuse getRootCause returns object casted to Throwable. So it should check, if Throwable is a subtype of MyOwnException, which is not true. So, in general, it is wrong way to use getRootCause to handle exceptions, is not it?
MyOwnException part
public class MyOwnException extends Exception {
// ....
}
Apache's ExceptionUtils.getRootCause
public static Throwable getRootCause(Throwable throwable) {
List list = getThrowableList(throwable);
return (list.size() < 2 ? null : (Throwable)list.get(list.size() - 1));
}
My code
try {
// do something
} catch (Exception e) {
try {
Throwable exc = ExceptionUtils.getRootCause(e);
if (exc instanceof MyOwnException) {
// do something
}
}
}
java exception-handling
asked Nov 21 '18 at 15:23
Czarek
7318
add a comment |
Is it possible, that below condition in "My code" will be fulfilled(true)? I belive that no, beacuse getRootCause returns object casted to Throwable. So it should check, if Throwable is a subtype of MyOwnException, which is not true. So, in general, it is wrong way to use getRootCause to handle exceptions, is not it?
MyOwnException part
public class MyOwnException extends Exception {
// ....
}
Apache's ExceptionUtils.getRootCause
public static Throwable getRootCause(Throwable throwable) {
List list = getThrowableList(throwable);
return (list.size() < 2 ? null : (Throwable)list.get(list.size() - 1));
}
My code
try {
// do something
} catch (Exception e) {
try {
Throwable exc = ExceptionUtils.getRootCause(e);
if (exc instanceof MyOwnException) {
// do something
}
}
}
java exception-handling
asked Nov 21 '18 at 15:23
Czarek
7318
add a comment |
Is it possible, that below condition in "My code" will be fulfilled(true)? I belive that no, beacuse getRootCause returns object casted to Throwable. So it should check, if Throwable is a subtype of MyOwnException, which is not true. So, in general, it is wrong way to use getRootCause to handle exceptions, is not it?
MyOwnException part
public class MyOwnException extends Exception {
// ....
}
Apache's ExceptionUtils.getRootCause
public static Throwable getRootCause(Throwable throwable) {
List list = getThrowableList(throwable);
return (list.size() < 2 ? null : (Throwable)list.get(list.size() - 1));
}
My code
try {
// do something
} catch (Exception e) {
try {
Throwable exc = ExceptionUtils.getRootCause(e);
if (exc instanceof MyOwnException) {
// do something
}
}
}
java exception-handling
asked Nov 21 '18 at 15:23
Czarek
7318
Is it possible, that below condition in "My code" will be fulfilled(true)? I belive that no, beacuse getRootCause returns object casted to Throwable. So it should check, if Throwable is a subtype of MyOwnException, which is not true. So, in general, it is wrong way to use getRootCause to handle exceptions, is not it?
MyOwnException part
public class MyOwnException extends Exception {
// ....
}
Apache's ExceptionUtils.getRootCause
public static Throwable getRootCause(Throwable throwable) {
List list = getThrowableList(throwable);
return (list.size() < 2 ? null : (Throwable)list.get(list.size() - 1));
}
My code
try {
// do something
} catch (Exception e) {
try {
Throwable exc = ExceptionUtils.getRootCause(e);
if (exc instanceof MyOwnException) {
// do something
}
}
}
java exception-handling
java exception-handling
asked Nov 21 '18 at 15:23
Czarek
7318
asked Nov 21 '18 at 15:23
Czarek
7318
asked Nov 21 '18 at 15:23
Czarek
7318
asked Nov 21 '18 at 15:23
Czarek
7318
asked Nov 21 '18 at 15:23
Czarek
7318
7318
add a comment |
add a comment |
1 Answer
1
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oldest
votes
instanceof will check against the actual run-time type of an object instance. It does not matter what the declared compile-time type of the variable that holds the object is.
So your condition works: If the root cause is a MyOwnException then your if block's body will execute.
answered Nov 21 '18 at 15:30
Thilo
193k77413572
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
instanceof will check against the actual run-time type of an object instance. It does not matter what the declared compile-time type of the variable that holds the object is.
So your condition works: If the root cause is a MyOwnException then your if block's body will execute.
answered Nov 21 '18 at 15:30
Thilo
193k77413572
add a comment |
instanceof will check against the actual run-time type of an object instance. It does not matter what the declared compile-time type of the variable that holds the object is.
So your condition works: If the root cause is a MyOwnException then your if block's body will execute.
answered Nov 21 '18 at 15:30
Thilo
193k77413572
add a comment |
instanceof will check against the actual run-time type of an object instance. It does not matter what the declared compile-time type of the variable that holds the object is.
So your condition works: If the root cause is a MyOwnException then your if block's body will execute.
answered Nov 21 '18 at 15:30
Thilo
193k77413572
instanceof will check against the actual run-time type of an object instance. It does not matter what the declared compile-time type of the variable that holds the object is.
So your condition works: If the root cause is a MyOwnException then your if block's body will execute.
answered Nov 21 '18 at 15:30
Thilo
193k77413572
answered Nov 21 '18 at 15:30
Thilo
193k77413572
answered Nov 21 '18 at 15:30
Thilo
193k77413572
answered Nov 21 '18 at 15:30
Thilo
193k77413572
193k77413572
add a comment |
add a comment |
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