php-java-bridge-users

[Php-java-bridge-users] Accessing enums

[Mark S. <mar...@me...>]

Hi,
I've been using the bridge for a couple of months now and this is the 
first problem I've had with it. 
I'm having trouble accessing the enum listed below. 

public class Test {
    public static enum Values {
        UNITS, VOLUME, SCORE
    }
In java I would reference it as Test.Values.UNITS
In php I'm calling $values = $test->Values after I instantiate the class 
and I get the following error:

java stack trace: [o(ByteArrayOutputStream):"java.lang.Exception: 
GetProperty failed: [o(Test):"@0"]->Values. Cause: 
java.lang.NoSuchFieldException: Values (with args:). Candidates: [] at 
php.java.bridge.JavaBridge.setException(JavaBridge.java:560) at 
php.java.bridge.JavaBridge.GetSetProp(JavaBridge.java:1303) at 
php.java.bridge.Request.handleRequest(Request.java:202) at 
php.java.bridge.Request.handleRequests(Request.java:221) at 
php.java.bridge.JavaBridge.run(JavaBridge.java:233) at 
php.java.bridge.ThreadPool$Delegate.run(ThreadPool.java:20) Caused by: 
java.lang.NoSuchFieldException: Values (with args:). Candidates: [] at 
php.java.bridge.JavaBridge.GetSetProp(JavaBridge.java:1286) ... 4 more "]

I've also tried $values = $test->Values() which does not throw an error 
but if I try to get the following I get another error:

$values->UNITS

"java.lang.Exception: GetProperty failed: 
[o(EnumMap$Values):"[]"]->UNITS. Cause: java.lang.NoSuchFieldException: 
UNITS (with args:).

Can you tell me what I'm doing wrong.

Thanks

RE: [Php-java-bridge-users] Accessing enums

[Jost B. <jos...@ya...>]

Hi Mark,

the syntax for namspace access is different than the
syntax for property access.  For example if you have a
class

public interface php {
 public interface java {
  public class bridge {
   public enum JavaBridge = {UNITS, VOLUME, SCORE};
  }
 }
}

the JavaBridge would be accessed via: 

 $bridge = new
JavaClass('php$java$bridge$JavaBridge');
 echo $bridge->UNITS;

this is to avoid name clashes with the class:

 $bridge = new
JavaClass("php.java.bridge.JavaBridge");

The different syntax makes sense, an I hope the PHP6
developers don't make the same mistake that sun made;
if you compile and place the above php.class into your
classpath, then no java developer can access the class
php.java.bridge.JavaBridge anymore because the java
compiler automatically rewrites the syntax
php.java.bridge.JavaBridge into
php$java$bridge$JavaBridge and stores this into the
.class file.

However, the real fun begins if you compile and place
the following java.class into your classpath:

public interface java {
 public class lang {
  public enum String = {one, two};
 }
}

After that a new java.lang.String() will return the
above enum. -- But I guess this problem is caught by
the java bytecode verifier...


Regards,
Jost Boekemeier



	

	
		
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