sebastiandietrich / privilegedaccessor Goto Github PK

... because PrivilegedAccessor is marked as Deprecated.

Attantion: invokeMethod(final Object instanceOrClass, final String 
methodSignature, final Object... arguments) is not 1:1 delegation, because 
Object... are changed into Object[] in StrictPA.

description copied from sourceforge:

Hi.

I've repackaged the existing source to use Ant to generate the jar, javadocs 
and distribution versions. The java source files themselves are completely 
unchanged, however they were separated into main and test sub-folders.

The ant build.xml file can also run the junit tests, after pulling down the 
junit library using Ivy.

Please see the attached zip file.

E.

see http://code.google.com/p/maven-gcu-plugin/wiki/Usage

What steps will reproduce the problem?
1. write a private method than expects an int[]
2. call it with PA.invokeMethod

Should work as expected, throws exception instead


   public void testAutoboxing() throws Exception {
      int[] Ints = new int[] {1, 2, 3};
      PA.invokeMethod(this.child, "setPrivateInts(int[])", Ints);
      assertEquals(Ints, PA.getValue(this.child, "privateInts"));
   }

Would you please support this case:

public class MyClass {
    // My private method throws a exception
    private int myPrivateMethod(int p) throws MyException {
        throw new MyException();
    }
}

// This test expects MyException
@Test(expected = MyException.class)
public void testMyPrivateMethod() {
    PA.invokeMethod(myInstance, "myPrivateMethod", 0);
}

description copied from sourceforge:

Hi,
I downloaded PA and have started using it at work, but
found I couldn't pass arrays of any type as arguments
to methods. A small modification to
PrivilegedAccessor.java makes this possible.
It's a little bit hacky (have to instantiate an array
object and call getClass() ) but it works. You can
avoid object instantiation for arrays of primitives,
but didn't bother, it was more code for no extra value.

I created a bunch of tests while I was working this
out, so I thought I might as well attach them as well.
There's probably some duplication with you current
tests, I haven't really checked, but I'll clean them up
later if you're interested in keeping them.
... Actually not, I can only attach one file. I can
send them on later if you like.

I'd also like to add some handling for inner classes,
and have some ideas brewing for extending the API if
you would be interested.

Cheers,
nut

e.g. the following code does not work:
PA.setValue(String.class, "serialVersionUID", 1); //sets the static final field 
serialVersionUID 

Either replace checked Exceptions with RuntimeException or add new methods not 
declaring checked exceptions.

E.g. 
PA.new(insatnce).value("fieldName", value).method("methodName", arguments)

OR

PA.new(instance).field("fieldName").value(value).method("methodName").arguments(
arguments)

OR 

PA.new(instance).f("fieldName").v(value).m("methodName").a(arguments)

What steps will reproduce the problem?
1. write a class with a private method with varargs
2. try to call that method from outside of that class using PA
3. you will get an IllegalArgumentException based on a NoSuchMethodException

What is the expected output? What do you see instead?
should run fine and call that method


Testcase in PATest that shows that functionality:
public void testInvokeMethodWithVarargs() throws Exception {
   PA.invokeMethod(this.parent, "setNamesWithVarargs(String...)", "Charly", "Browne");
   assertEquals("Charly", PA.getValue(this.parent, "privateName"));
   assertEquals("Browne", PA.getValue(this.parent, "privateObject"));
}

This should not work and instead throw an IllegalArgumentException

This is a bug in PA and not in PrivilegedAccessor, since PA works with varargs, 
while PrivilegedAccessor works with Object[]

There is not licence nor in jar neither in source files.

What steps will reproduce the problem?
1. private constructor expecting primitives (e.g. int, float)
2. try to call it using primitives or object types
3. does not work since varargs are converted to object types

getMethodSignatures() returns the method name and arguments.  It would be 
helpful to have a version of this getMethodSignaturesWithReturnType() that also 
includes the return type in the String.

Examples of data returned in the existing method are:
getMethodSignatures()
wait()
wait(long)
registerNatives()
equals(java.lang.Object)

Here are versions of those same methods using the new method
getMethodSignaturesWithReturnType()
void wait()
void wait(long)
void registerNatives()
boolean equals(java.lang.Object)

Attached is an implementation of this new method in PrivilegedAccessor and PA 
as well as their associated test classes.  The code is based on the trunk 
version of these files.

copied from old sourceforge location:

The PA could access Fields and invoke methodes only if
the names are KNOWN. 
For this the PA should contain methods to get this names.

I would suggest to implement new features like :
List getFieldNames(Object obj)
List getMethodNames(Object obj)

and for further Information methods like this:
getInformation(<fieldOrMethodname>)
which creates an output like this:

private long <fieldOrMethodname> = 33
protected java.lang.String uppercase(java.lang.String
string)

Perhaps a "scanObject" Method could be useful, which
shows all Fields and methods from the Object like this:

this.is.my.package.structure.Person:
Fields:
private java.lang.String name = "this is the name"
private int age = 33
...
Methods:
public java.lang.String getName()
protected java.lang.String
uppercase(java.lang.String string)
...

best regards,
Matthias Herp

automatically deploy snapshots to maven central
semi-automatically deploy releases to maven central

see 
https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage
+Guide


P.S. continuous delivery is IMHO not a good idea for libraries/frameworks

Groovy like Expand - dynamically defining object structure/behaviour.

PA.newExpando().field("fieldName").value(value)

PA.instantiate("java.lang.String").getValue("value"); // returns the private 
final character storage

should be possible by returnig a dynamic proxy to String

but this proxy should behave like the original class, i.e.
PA.instantiate("java.lang.String").hashCode(); should still work

invokeMethod() with Object[] is currently not supported (since varargs are 
converted to Object[])

find a solution for that

What steps will reproduce the problem?
1. define a private constructor with an array argument
2. try to invoke that constructor using PA
3. you'll get an IllegalArgumentException

What is the expected output? What do you see instead?
Constructor should be called fine without exeption


Unit-Test:
assertEquals(this.child, PA.instantiate(Child.class, new Class[] 
{String[].class}, new String[] {"Charlie", "Browne"}));

description copied from old sourceforge repository:

final java.lang.reflect.Method m = Database.class.getDeclaredMethod(init, 
File.class);
m.setAccessible(true);
m.invoke(Database.class, dir);
//PrivilegedAccessor.invokeMethod(Database.class,"init(final File dir)", dir);
The commented line should have the same effect as the 3 reflect above it. 
However, that's no the case. Why?
The code is on:

http://memorizeasy.googlecode.com/svn-history/r94/trunk/MemorizEasy/src/com/mysi
mpatico/memorizeasy/test/DatabaseTest.java
http://memorizeasy.googlecode.com/svn-history/r94/trunk/MemorizEasy/src/com/mysi
mpatico/memorizeasy/engine/Database.java