Examples of com.sun.jdi.Value

com.sun.jdi.Value

The mirror for a value in the target VM. This interface is the root of a value hierarchy encompassing primitive values and object values.

Some examples of where values may be accessed:

{@link ObjectReference#getValue(com.sun.jdi.Field) ObjectReference.getValue(Field)} - value of a field
{@link StackFrame#getValue(com.sun.jdi.LocalVariable) StackFrame.getValue(LocalVariable)} - value of a variable
{@link VirtualMachine#mirrorOf(double) VirtualMachine.mirrorOf(double)} - created in the target VM by the JDI client
{@link com.sun.jdi.event.ModificationWatchpointEvent#valueToBe() ModificationWatchpointEvent.valueToBe()} - returned with an event

The following table illustrates which subinterfaces of Value are used to mirror values in the target VM --

Subinterfaces of {@link PrimitiveValue}
Kind of value	For example - expression in target	Is mirrored as an instance of	{@link Type} of value {@link #type() Value.type()}
a boolean	`true`	{@link BooleanValue}	{@link BooleanType}
a byte	`(byte)4`	{@link ByteValue}	{@link ByteType}
a char	`'a'`	{@link CharValue}	{@link CharType}
a double	`3.1415926`	{@link DoubleValue}	{@link DoubleType}
a float	`2.5f`	{@link FloatValue}	{@link FloatType}
an int	`22`	{@link IntegerValue}	{@link IntegerType}
a long	`1024L`	{@link LongValue}	{@link LongType}
a short	`(short)12`	{@link ShortValue}	{@link ShortType}
a void		{@link VoidValue}	{@link VoidType}
Subinterfaces of {@link ObjectReference}
Kind of value	For example - expression in target	Is mirrored as an instance of	{@link Type} of value {@link #type() Value.type()}
a class instance	`this`	{@link ObjectReference}	{@link ClassType}
an array	`new int[5]`	{@link ArrayReference}	{@link ArrayType}
a string	`"hello"`	{@link StringReference}	{@link ClassType}
a thread	`Thread.currentThread()`	{@link ThreadReference}	{@link ClassType}
a thread group	`Thread.currentThread() .getThreadGroup()`	{@link ThreadGroupReference}	{@link ClassType}
a `java.lang.Class` instance	`this.getClass()`	{@link ClassObjectReference}	{@link ClassType}
a class loader	`this.getClass() .getClassLoader()`	{@link ClassLoaderReference}	{@link ClassType}
Other
Kind of value	For example - expression in target	Is mirrored as	{@link Type} of value
null	`null`	`null`	n/a

@author Robert Field @author Gordon Hirsch @author James McIlree @since 1.3

      boolean invokeNonvirtual) throws DebugException {
    if (receiverClass != null && receiverObject != null) {
      throw new IllegalArgumentException(
          JDIDebugModelMessages.JDIThread_can_only_specify_one_receiver_for_a_method_invocation);
    }
    Value result = null;
    int timeout = getRequestTimeout();
    try {
      // this is synchronized such that any other operation that
      // might be resuming this thread has a chance to complete before
      // we determine if it is safe to continue with a method invocation.

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      p = fThread.referenceType().fieldByName("priority"); //$NON-NLS-1$
      if (p == null) {
        requestFailed(
            JDIDebugModelMessages.JDIThread_no_priority_field, null);
      }
      Value v = fThread.getValue(p);
      if (v instanceof IntegerValue) {
        return ((IntegerValue) v).value();
      }
      requestFailed(
          JDIDebugModelMessages.JDIThread_priority_not_an_integer,

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  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o instanceof JDIValue) {
      Value other = ((JDIValue) o).getUnderlyingValue();
      if (fValue == null) {
        return false;
      }
      if (other == null) {
        return false;

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      VirtualMachineImpl vm) throws InvalidTypeException {
    List<Value> result = new ArrayList<Value>(values.size());
    Iterator<? extends Value> iterValues = values.iterator();
    Iterator<Type> iterTypes = types.iterator();
    while (iterValues.hasNext()) {
      Value value = iterValues.next();
      Type type = iterTypes.next();
      result.add(checkValue(value, type, vm));
    }
    return result;
  }

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   * @see IJavaDebugTarget#newValue(boolean)
   */
  public IJavaValue newValue(boolean value) {
    VirtualMachine vm = getVM();
    if (vm != null) {
      Value v = vm.mirrorOf(value);
      return JDIValue.createValue(this, v);
    }
    return null;
  }

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   * @see IJavaDebugTarget#newValue(byte)
   */
  public IJavaValue newValue(byte value) {
    VirtualMachine vm = getVM();
    if (vm != null) {
      Value v = vm.mirrorOf(value);
      return JDIValue.createValue(this, v);
    }
    return null;
  }

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   * @see IJavaDebugTarget#newValue(char)
   */
  public IJavaValue newValue(char value) {
    VirtualMachine vm = getVM();
    if (vm != null) {
      Value v = vm.mirrorOf(value);
      return JDIValue.createValue(this, v);
    }
    return null;
  }

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   * @see IJavaDebugTarget#newValue(double)
   */
  public IJavaValue newValue(double value) {
    VirtualMachine vm = getVM();
    if (vm != null) {
      Value v = vm.mirrorOf(value);
      return JDIValue.createValue(this, v);
    }
    return null;
  }

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   * @see IJavaDebugTarget#newValue(float)
   */
  public IJavaValue newValue(float value) {
    VirtualMachine vm = getVM();
    if (vm != null) {
      Value v = vm.mirrorOf(value);
      return JDIValue.createValue(this, v);
    }
    return null;
  }

View Full Code Here

   * @see IJavaDebugTarget#newValue(int)
   */
  public IJavaValue newValue(int value) {
    VirtualMachine vm = getVM();
    if (vm != null) {
      Value v = vm.mirrorOf(value);
      return JDIValue.createValue(this, v);
    }
    return null;
  }

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Related Classes of com.sun.jdi.Value

com.google.code.vimsztool.debug.eval.ExpEval

com.google.code.vimsztool.debug.ExpressionEval

org.drools.eclipse.debug.core.MVELStackFrame

org.eclipse.jdi.internal.ClassTypeImpl

org.eclipse.jdi.internal.StackFrameImpl

org.eclipse.jdi.internal.ValueImpl

org.eclipse.jdt.internal.debug.core.model.JDIArrayValue

org.eclipse.jdt.internal.debug.core.model.JDIClassType

org.eclipse.jdt.internal.debug.core.model.JDIDebugTarget

org.eclipse.jdt.internal.debug.core.model.JDIModificationVariable

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{@link ObjectReference#getValue(com.sun.jdi.Field) ObjectReference.getValue(Field)}	- value of a field
{@link StackFrame#getValue(com.sun.jdi.LocalVariable) StackFrame.getValue(LocalVariable)}	- value of a variable
{@link VirtualMachine#mirrorOf(double) VirtualMachine.mirrorOf(double)}	- created in the target VM by the JDI client
{@link com.sun.jdi.event.ModificationWatchpointEvent#valueToBe() ModificationWatchpointEvent.valueToBe()}	- returned with an event