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src/java.base/share/classes/java/lang/reflect/UndeclaredThrowableException.java
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@@ -23,10 +23,17 @@
* questions.
*/
package java.lang.reflect;
+import jdk.internal.misc.SharedSecrets;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamField;
+
/**
* Thrown by a method invocation on a proxy instance if its invocation
* handler's {@link InvocationHandler#invoke invoke} method throws a
* checked exception (a {@code Throwable} that is not assignable
* to {@code RuntimeException} or {@code Error}) that
@@ -57,25 +64,18 @@
*/
public class UndeclaredThrowableException extends RuntimeException {
static final long serialVersionUID = 330127114055056639L;
/**
- * the undeclared checked exception that was thrown
- * @serial
- */
- private Throwable undeclaredThrowable;
-
- /**
* Constructs an {@code UndeclaredThrowableException} with the
* specified {@code Throwable}.
*
* @param undeclaredThrowable the undeclared checked exception
* that was thrown
*/
public UndeclaredThrowableException(Throwable undeclaredThrowable) {
- super((Throwable) null); // Disallow initCause
- this.undeclaredThrowable = undeclaredThrowable;
+ super(null, undeclaredThrowable); // Disallow initCause
}
/**
* Constructs an {@code UndeclaredThrowableException} with the
* specified {@code Throwable} and a detail message.
@@ -85,12 +85,11 @@
* @param s the detail message
*/
public UndeclaredThrowableException(Throwable undeclaredThrowable,
String s)
{
- super(s, null); // Disallow initCause
- this.undeclaredThrowable = undeclaredThrowable;
+ super(s, undeclaredThrowable); // Disallow initCause
}
/**
* Returns the {@code Throwable} instance wrapped in this
* {@code UndeclaredThrowableException}, which may be {@code null}.
@@ -100,20 +99,40 @@
* obtaining this information.
*
* @return the undeclared checked exception that was thrown
*/
public Throwable getUndeclaredThrowable() {
- return undeclaredThrowable;
+ return getCause();
}
/**
- * Returns the cause of this exception (the {@code Throwable}
- * instance wrapped in this {@code UndeclaredThrowableException},
- * which may be {@code null}).
+ * Serializable fields for UndeclaredThrowableException.
*
- * @return the cause of this exception.
- * @since 1.4
+ * @serialField undeclaredThrowable Throwable
*/
- public Throwable getCause() {
- return undeclaredThrowable;
+ private static final ObjectStreamField[] serialPersistentFields = {
+ new ObjectStreamField("undeclaredThrowable", Throwable.class)
+ };
+
+ /*
+ * Reconstitutes the UndeclaredThrowableException instance from a stream
+ * and initialize the cause properly when deserializing from an older
+ * version.
+ */
+ private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
+ ObjectInputStream.GetField fields = s.readFields();
+ Throwable exception = (Throwable) fields.get("undeclaredThrowable", null);
+ if (exception != null) {
+ SharedSecrets.getJavaLangAccess().setCause(this, exception);
+ }
+ }
+
+ /*
+ * To maintain compatibility with older implementation, write a serial
+ * "ex" field with the cause as the value.
+ */
+ private void writeObject(ObjectOutputStream out) throws IOException {
+ ObjectOutputStream.PutField fields = out.putFields();
+ fields.put("undeclaredThrowable", getCause());
+ out.writeFields();
}
}
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