Interface Location   All Superinterfaces: 
Comparable<Location>, Mirror
  public interface Location extends Mirror, Comparable<Location> A point within the executing code of the target VM. Locations are used to identify the current position of a suspended thread (analogous to an instruction pointer or program counter register in native programs). They are also used to identify the position at which to set a breakpoint.  The availability of a line number for a location will depend on the level of debugging information available from the target VM. 
 Several mirror interfaces have locations. Each such mirror extends a Locatable interface. 
 Strata 
 The source information for a Location is dependent on the stratum which is used. A stratum is a source code level within a sequence of translations. For example, say the baz program is written in the programming language "Foo" then translated to the language "Bar" and finally translated into the Java programming language. The Java programming language stratum is named "Java", let's say the other strata are named "Foo" and "Bar". A given location (as viewed by the sourceName() and lineNumber() methods) might be at line 14 of "baz.foo" in the "Foo" stratum, line 23 of "baz.bar" in the "Bar" stratum and line 71 of the "Java" stratum. Note that while the Java programming language may have only one source file for a reference type, this restriction does not apply to other strata - thus each Location should be consulted to determine its source path. Queries which do not specify a stratum (sourceName(), sourcePath() and lineNumber()) use the VM's default stratum (VirtualMachine.getDefaultStratum()). If the specified stratum (whether explicitly specified by a method parameter or implicitly as the VM's default) is null or is not available in the declaring type, the declaring type's default stratum is used (declaringType().defaultStratum()). Note that in the normal case, of code that originates as Java programming language source, there will be only one stratum ("Java") and it will be returned as the default. To determine the available strata use ReferenceType.availableStrata().
  Since: 1.3 See Also:   EventRequestManager StackFrame BreakpointEvent ExceptionEvent Locatable       Method Summary    
Modifier and Type
Method
Description


long
codeIndex()
 Gets the code position within this location's method. 


ReferenceType
declaringType()
 Gets the type to which this Location belongs. 


boolean
equals(Object obj)
 Compares the specified Object with this Location for equality. 


int
hashCode()
 Returns the hash code value for this Location. 


int
lineNumber()
 Gets the line number of this Location. 


int
lineNumber(String stratum)
 The line number of this Location. 


Method
method()
 Gets the method containing this Location. 


String
sourceName()
 Gets an identifing name for the source corresponding to this location. 


String
sourceName(String stratum)
 Gets an identifing name for the source corresponding to this location. 


String
sourcePath()
 Gets the path to the source corresponding to this location. 


String
sourcePath(String stratum)
 Gets the path to the source corresponding to this location. 

    Methods declared in interface java.lang.Comparable
 compareTo
  Methods declared in interface com.sun.jdi.Mirror
 toString, virtualMachine
     Method Details  declaringType ReferenceType declaringType() Gets the type to which this Location belongs. Normally the declaring type is a ClassType, but executable locations also may exist within the static initializer of an InterfaceType.  Returns: the ReferenceType containing this Location.   method Method method() Gets the method containing this Location.  Returns: the location's Method.   codeIndex long codeIndex() Gets the code position within this location's method.  Returns: the long representing the position within the method or -1 if location is within a native method.   sourceName String sourceName() throws AbsentInformationException Gets an identifing name for the source corresponding to this location.  This method is equivalent to sourceName(vm.getDefaultStratum()) - see sourceName(String) for more information.
  Returns: a string specifying the source Throws: 
AbsentInformationException - if the source name is not known   sourceName String sourceName(String stratum) throws AbsentInformationException Gets an identifing name for the source corresponding to this location. Interpretation of this string is the responsibility of the source repository mechanism.  Returned name is for the specified stratum (see the class comment for a description of strata). 
 The returned string is the unqualified name of the source file for this Location. For example, java.lang.Thread would return "Thread.java".
  Parameters: 
stratum - The stratum to retrieve information from or null for the declaring type's default stratum. Returns: a string specifying the source Throws: 
AbsentInformationException - if the source name is not known Since: 1.4   sourcePath String sourcePath() throws AbsentInformationException Gets the path to the source corresponding to this location.  This method is equivalent to sourcePath(vm.getDefaultStratum()) - see sourcePath(String) for more information.
  Returns: a string specifying the source Throws: 
AbsentInformationException - if the source name is not known   sourcePath String sourcePath(String stratum) throws AbsentInformationException Gets the path to the source corresponding to this location. Interpretation of this string is the responsibility of the source repository mechanism.  Returned path is for the specified stratum (see the class comment for a description of strata). 
 In the reference implementation, for strata which do not explicitly specify source path (the Java programming language stratum never does), the returned string is the package name of declaringType() converted to a platform dependent path followed by the unqualified name of the source file for this Location (sourceName(stratum)). For example, on a Windows platform, java.lang.Thread would return "java\lang\Thread.java".
  Parameters: 
stratum - The stratum to retrieve information from or null for the declaring type's default stratum. Returns: a string specifying the source Throws: 
AbsentInformationException - if the source name is not known Since: 1.4   lineNumber int lineNumber() Gets the line number of this Location.  This method is equivalent to lineNumber(vm.getDefaultStratum()) - see lineNumber(String) for more information.
  Returns: an int specifying the line in the source, returns -1 if the information is not available; specifically, always returns -1 for native methods.   lineNumber int lineNumber(String stratum) The line number of this Location. The line number is relative to the source specified by sourceName(stratum).  Returned line number is for the specified stratum (see the class comment for a description of strata).
  Parameters: 
stratum - The stratum to retrieve information from or null for the declaring type's default stratum. Returns: an int specifying the line in the source, returns -1 if the information is not available; specifically, always returns -1 for native methods. Since: 1.4   equals boolean equals(Object obj) Compares the specified Object with this Location for equality.  Overrides: 
equals in class Object
 Parameters: 
obj - the reference object with which to compare. Returns: true if the Object is a Location and if it refers to the same point in the same VM as this Location. See Also:   Object.hashCode() HashMap     hashCode int hashCode() Returns the hash code value for this Location.  Overrides: 
hashCode in class Object
 Returns: the integer hash code See Also:   Object.equals(java.lang.Object) System.identityHashCode(java.lang.Object)     

    
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