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/*
* @test /nodynamiccopyright/
* @bug 4209652 4363318
* @summary Basic test for chained exceptions & Exception.getStackTrace().
* @author Josh Bloch
*/
public class ChainedExceptions {
public static void main(String args[]) {
try {
a();
} catch(HighLevelException e) {
StackTraceElement[] highTrace = e.getStackTrace();
int depthTrim = highTrace.length - 2;
check(e, highTrace[0], "a", 48);
check(e, highTrace[1], "main", 11);
Throwable mid = e.getCause();
StackTraceElement[] midTrace = mid.getStackTrace();
if (midTrace.length - depthTrim != 4)
throw new RuntimeException("Mid depth");
check(mid, midTrace[0], "c", 58);
check(mid, midTrace[1], "b", 52);
check(mid, midTrace[2], "a", 46);
check(mid, midTrace[3], "main", 11);
Throwable low = mid.getCause();
StackTraceElement[] lowTrace = low.getStackTrace();
if (lowTrace.length - depthTrim != 6)
throw new RuntimeException("Low depth");
check(low, lowTrace[0], "e", 65);
check(low, lowTrace[1], "d", 62);
check(low, lowTrace[2], "c", 56);
check(low, lowTrace[3], "b", 52);
check(low, lowTrace[4], "a", 46);
check(low, lowTrace[5], "main", 11);
if (low.getCause() != null)
throw new RuntimeException("Low cause != null");
}
}
static void a() throws HighLevelException {
try {
b();
} catch(MidLevelException e) {
throw new HighLevelException(e);
}
}
static void b() throws MidLevelException {
c();
}
static void c() throws MidLevelException {
try {
d();
} catch(LowLevelException e) {
throw new MidLevelException(e);
}
}
static void d() throws LowLevelException {
e();
}
static void e() throws LowLevelException {
throw new LowLevelException();
}
private static final String OUR_CLASS = ChainedExceptions.class.getName();
private static final String OUR_FILE_NAME = "ChainedExceptions.java";
private static void check(Throwable t, StackTraceElement e, String methodName, int n) {
if (!e.getClassName().equals(OUR_CLASS))
throw new RuntimeException("Class: " + e, t);
if (!e.getMethodName().equals(methodName))
throw new RuntimeException("Method name: " + e, t);
if (!e.getFileName().equals(OUR_FILE_NAME))
throw new RuntimeException("File name: " + e, t);
if (e.getLineNumber() != n)
throw new RuntimeException("Line number: " + e, t);
}
}
class HighLevelException extends Exception {
HighLevelException(Throwable cause) { super(cause); }
}
class MidLevelException extends Exception {
MidLevelException(Throwable cause) { super(cause); }
}
class LowLevelException extends Exception {
}
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