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8210721: Replace legacy serial exception field with Throwable::cause

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Reviewed-by: dfuchs, lancea
This commit is contained in:
Mandy Chung 2018-09-17 15:22:46 -07:00
parent b27f471bdd
commit b72ab42e49
9 changed files with 486 additions and 108 deletions
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54
src/java.base/share/classes/java/lang/reflect/UndeclaredThrowableException.java
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@ -25,6 +25,12 @@
package java.lang.reflect;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamField;
import jdk.internal.misc.SharedSecrets;
/**
* Thrown by a method invocation on a proxy instance if its invocation
* handler's {@link InvocationHandler#invoke invoke} method throws a
@ -58,12 +64,6 @@ package java.lang.reflect;
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}.
@ -72,8 +72,7 @@ public class UndeclaredThrowableException extends RuntimeException {
* that was thrown
*/
public UndeclaredThrowableException(Throwable undeclaredThrowable) {
super((Throwable) null); // Disallow initCause
this.undeclaredThrowable = undeclaredThrowable;
super(null, undeclaredThrowable); // Disallow initCause
}
/**
@ -87,8 +86,7 @@ public class UndeclaredThrowableException extends RuntimeException {
public UndeclaredThrowableException(Throwable undeclaredThrowable,
String s)
{
super(s, null); // Disallow initCause
this.undeclaredThrowable = undeclaredThrowable;
super(s, undeclaredThrowable); // Disallow initCause
}
/**
@ -102,18 +100,38 @@ public class UndeclaredThrowableException extends RuntimeException {
* @return the undeclared checked exception that was thrown
*/
public Throwable getUndeclaredThrowable() {
return undeclaredThrowable;
return super.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", super.getCause());
out.writeFields();
}
}