Eclipse JDT Plug-in Developer Guide (Galileo) - IJavaObject (Eclipse JDT API Specification)

Method Summary

void disableCollection ()
          Prevents this object from being garbage collected.

void enableCollection ()
          Permits this object to be garbage collected.

IJavaFieldVariable getField ( String name, boolean superField)
          Returns a variable representing the field in this object with the given name, or null if there is no field with the given name, or the name is ambiguous.

IJavaFieldVariable getField ( String name, String typeSignature)
          Returns a variable representing the field in this object with the given name declared in the type with the given signature, or null if there is no field with the given name, or the name is ambiguous.

IJavaThread getOwningThread ()
          Returns the threads which owns for the monitor associated to this object, or null if no thread owns the monitor.

IJavaObject[] getReferringObjects (long max)
          Returns objects that directly reference this object.

long getUniqueId ()
          Returns the unique id for this object.

IJavaThread[] getWaitingThreads ()
          Returns the threads waiting for the monitor associated to this object, or null if no thread is waiting for the monitor.

IJavaValue sendMessage ( String selector, String signature, IJavaValue[] args, IJavaThread thread, boolean superSend)
          Returns the result of sending the specified message to this object with the given arguments in the specified thread.

IJavaValue sendMessage ( String selector, String signature, IJavaValue[] args, IJavaThread thread, String typeSignature)
          Returns the result of sending the specified message on the specified declaring type to this object with the given arguments in the specified thread.

Methods inherited from interface org.eclipse.jdt.debug.core. IJavaValue

getGenericSignature, getJavaType, getSignature, isNull

Methods inherited from interface org.eclipse.debug.core.model. IValue

getReferenceTypeName, getValueString, getVariables, hasVariables, isAllocated

Methods inherited from interface org.eclipse.debug.core.model. IDebugElement

getDebugTarget, getLaunch, getModelIdentifier

Methods inherited from interface org.eclipse.core.runtime. IAdaptable

getAdapter

Method Detail

sendMessage


IJavaValue sendMessage(
String selector,
                       
String signature,
                       
IJavaValue[] args,
                       
IJavaThread thread,
                       boolean superSend)
                       throws 
DebugException

Returns the result of sending the specified message to this object with the given arguments in the specified thread. The given thread is resumed to perform the method invocation. The thread will suspend in its original location when the method invocation is complete. This method does not return until the method invocation is complete. Invoking a method in the target VM can result in breakpoints being hit, infinite loops, and deadlock.

Parameters:

selector - the selector of the method to be invoked

signature - the JNI style signature of the method to be invoked

args - the arguments of the method, which can be null or empty if there are none

thread - the thread in which to invoke the method

superSend - true if the method lookup should begin in this object's superclass

Returns:

the result of invoking the method

Throws:


DebugException

- if this method fails. Reasons include:

Failure communicating with the VM. The DebugException's status code contains the underlying exception responsible for the failure.
This object does not implement the specified method
An exception occurs while invoking the specified method
The given thread is already performing a message send, (status code IJavaThread.ERR_NESTED_METHOD_INVOCATION)
The given thread is not currently suspended (status code IJavaThread.ERR_THREAD_NOT_SUSPENDED)
The given thread was explicitly suspended (status code IJavaThread.ERR_INCOMPATIBLE_THREAD_STATE)

sendMessage


IJavaValue sendMessage(
String selector,
                       
String signature,
                       
IJavaValue[] args,
                       
IJavaThread thread,
                       
String typeSignature)
                       throws 
DebugException

Returns the result of sending the specified message on the specified declaring type to this object with the given arguments in the specified thread. The given thread is resumed to perform the method invocation. The thread will suspend in its original location when the method invocation is complete. This method does not return until the method invocation is complete. Invoking a method in the target VM can result in breakpoints being hit, infinite loops, and deadlock.

Parameters:

selector - the selector of the method to be invoked

signature - the JNI style signature of the method to be invoked

args - the arguments of the method, which can be null or empty if there are none

thread - the thread in which to invoke the method

typeSignature - the signature of the type in which the method is defined or null if the method should be invoked normally using polymorphism

Returns:

the result of invoking the method

Throws:


DebugException

- if this method fails. Reasons include:

Failure communicating with the VM. The DebugException's status code contains the underlying exception responsible for the failure.
This object does not implement the specified method
An exception occurs while invoking the specified method
The given thread is already performing a message send, (status code IJavaThread.ERR_NESTED_METHOD_INVOCATION)
The given thread is not currently suspended (status code IJavaThread.ERR_THREAD_NOT_SUSPENDED)
The given thread was explicitly suspended (status code IJavaThread.ERR_INCOMPATIBLE_THREAD_STATE)

Since:

2.0.1

getField


IJavaFieldVariable getField(
String name,
                            boolean superField)
                            throws 
DebugException

Returns a variable representing the field in this object with the given name, or null if there is no field with the given name, or the name is ambiguous.

Parameters:

name - field name

superField - whether or not to get the field in the superclass of this objects.

Returns:

the variable representing the field, or null

Throws:


DebugException

- if this method fails. Reasons include:

Failure communicating with the VM. The DebugException's status code contains the underlying exception responsible for the failure.

getField


IJavaFieldVariable getField(
String name,
                            
String typeSignature)
                            throws 
DebugException

Returns a variable representing the field in this object with the given name declared in the type with the given signature, or null if there is no field with the given name, or the name is ambiguous.

Parameters:

name - field name

typeSignature - the signature of the type in which the field is defined

Returns:

the variable representing the field, or null

Throws:


DebugException

- if this method fails. Reasons include:

Failure communicating with the VM. The DebugException's status code contains the underlying exception responsible for the failure.

getWaitingThreads


IJavaThread[] getWaitingThreads()
                                throws 
DebugException

Returns the threads waiting for the monitor associated to this object, or null if no thread is waiting for the monitor.

Returns:

the thread waiting for the monitor, or null.

Throws:


DebugException

- if this method fails. Reasons include:

The VM is not able to retrieve the monitor information
Failure communicating with the VM. The DebugException's status code contains the underlying exception responsible for the failure.

Since:

3.1

getOwningThread


IJavaThread getOwningThread()
                            throws 
DebugException

Returns the threads which owns for the monitor associated to this object, or null if no thread owns the monitor.

Returns:

the thread which owns the monitor, or null.

Throws:


DebugException

- if this method fails. Reasons include:

The VM is not able to retrieve the monitor information
Failure communicating with the VM. The DebugException's status code contains the underlying exception responsible for the failure.

Since:

3.1

getReferringObjects


IJavaObject[] getReferringObjects(long max)
                                  throws 
DebugException

Returns objects that directly reference this object.

Parameters:: max - the maximum number of references to retrieve or 0 for all references
Returns:: objects that directly reference this object
Throws:: DebugException
Since:: 3.3

enableCollection

void enableCollection()
                      throws 
DebugException

Permits this object to be garbage collected. Has no effect if this VM does not support enabling/disabling of garbage collection of specific objects.

Throws:: CoreException - if request fails; DebugException
Since:: 3.4
See Also:: IJavaDebugTarget

disableCollection

void disableCollection()
                       throws 
DebugException

Prevents this object from being garbage collected. Has no effect if this VM does not support enabling/disabling of garbage collection of specific objects.

Throws:: CoreException - if request fails; DebugException
Since:: 3.4
See Also:: IJavaDebugTarget

getUniqueId

long getUniqueId()
                 throws 
DebugException

Returns the unique id for this object.

Returns:: unique id or -1 if this value is null
Throws:: DebugException
Since:: 3.4

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Eclipse JDT
Release 3.5

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org.eclipse.jdt.debug.core Interface IJavaObject

sendMessage

sendMessage

getField

getField

getWaitingThreads

getOwningThread

getReferringObjects

enableCollection

disableCollection

getUniqueId

org.eclipse.jdt.debug.core
Interface IJavaObject