com.bea.jvm
Interface CallTraceElement


public interface CallTraceElement

1.3 compatible version of StackTraceElement. Want this functionality in the API no matter the JDK level.

Author:
Marcus Hirt

Method Summary
 boolean equals(java.lang.Object obj)
          Returns true if the specified object is another CallTraceElement instance representing the same execution point as this instance.
 java.lang.String getClassName()
          Returns the fully qualified name of the class containing the execution point represented by this call trace element.
 java.lang.String getFileName()
          Returns the name of the source file containing the execution point represented by this stack trace element.
 int getLineNumber()
          Returns the line number of the source line containing the execution point represented by this call trace element.
 java.lang.String getMethodName()
          Returns the name of the method containing the execution point represented by this call trace element.
 ThreadSnapshot.Monitor[] getMonitors()
          Return the monitors that was taken by the thread at this stack trace element.
 boolean isNativeMethod()
          Returns true if the method containing the execution point represented by this call trace element is a native method.
 java.lang.String toString()
          Returns a string representation of this CallTraceElement.
 

Method Detail

getFileName

public java.lang.String getFileName()
Returns the name of the source file containing the execution point represented by this stack trace element. Generally, this corresponds to the SourceFile attribute of the relevant class file (as per The Java Virtual Machine Specification, Section 4.7.7). In some systems, the name may refer to some source code unit other than a file, such as an entry in source repository.

Returns:
the name of the file containing the execution point represented by this stack trace element, or null if this information is unavailable.

getLineNumber

public int getLineNumber()
Returns the line number of the source line containing the execution point represented by this call trace element. Generally, this is derived from the LineNumberTable attribute of the relevant class file (as per The Java Virtual Machine Specification, Section 4.7.8).

Returns:
the line number of the source line containing the execution point represented by this call trace element, or a negative number if this information is unavailable.

getClassName

public java.lang.String getClassName()
Returns the fully qualified name of the class containing the execution point represented by this call trace element.

Returns:
the fully qualified name of the Class containing the execution point represented by this call trace element.

getMethodName

public java.lang.String getMethodName()
Returns the name of the method containing the execution point represented by this call trace element. If the execution point is contained in an instance or class initializer, this method will return the appropriate special method name, <init> or <clinit>, as per Section 3.9 of The Java Virtual Machine Specification.

Returns:
the name of the method containing the execution point represented by this call trace element.

isNativeMethod

public boolean isNativeMethod()
Returns true if the method containing the execution point represented by this call trace element is a native method.

Returns:
true if the method containing the execution point represented by this call trace element is a native method.

toString

public java.lang.String toString()
Returns a string representation of this CallTraceElement. The format of this string depends on the implementation, but the following examples may be regarded as typical:

Overrides:
toString in class java.lang.Object
See Also:
Throwable.printStackTrace()

equals

public boolean equals(java.lang.Object obj)
Returns true if the specified object is another CallTraceElement instance representing the same execution point as this instance. Two call trace elements a and b are equal if and only if:
     equals(a.getFileName(), b.getFileName()) &&
     a.getLineNumber() == b.getLineNumber()) &&
     equals(a.getClassName(), b.getClassName()) &&
     equals(a.getMethodName(), b.getMethodName())
 
where equals is defined as:
     static boolean equals(Object a, Object b) {
         return a==b || (a != null && a.equals(b));
     }
 

Overrides:
equals in class java.lang.Object
Parameters:
obj - the object to be compared with this call trace element.
Returns:
true if the specified object is another CallTraceElement instance representing the same execution point as this instance.

getMonitors

public ThreadSnapshot.Monitor[] getMonitors()
Return the monitors that was taken by the thread at this stack trace element. With one exceptions, all these monitors are currently held by the thread. The one exception is if the thread is waiting for notification on a monitor. Even though this monitor was taken in some stack trace element, it is currently released by the thread. To be sure that the thread still holds the monitors returned by this function, you must check each of them against the "waitingOn" monitor of the thread, if any. Note the following about this method:

Returns:
an array of monitors taken by the thread at this stack frame.