Examples of com.sun.jdi.Type

com.sun.jdi.Type

The mirror for a type in the target VM. This interface is the root of a type hierarchy encompassing primitive types and reference types.

A Type may be used to represent a run-time type:

{@link Value}.type()

or a compile-time type:

{@link Field#type()}
{@link Method#returnType()}
{@link Method#argumentTypes()}
{@link LocalVariable#type()}
{@link ArrayType#componentType()}

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

Subinterfaces of {@link PrimitiveType}
Type declared in target as		Is mirrored as an instance of
`boolean`		{@link BooleanType}
`byte`		{@link ByteType}
`char`		{@link CharType}
`double`		{@link DoubleType}
`float`		{@link FloatType}
`int`		{@link IntegerType}
`long`		{@link LongType}
`short`		{@link ShortType}
`void`		{@link VoidType}
Subinterfaces of {@link ReferenceType}
Type declared in target as	For example	Is mirrored as an instance of
a class	`Date`	{@link ClassType}
an interface	`Runnable`	{@link InterfaceType}
an array		{@link ArrayType}
an array	`int[]`	{@link ArrayType} whose{@link ArrayType#componentType() componentType()} is{@link IntegerType}
an array	`Date[]`	{@link ArrayType} whose{@link ArrayType#componentType() componentType()} is{@link ClassType}
an array	`Runnable[]`	{@link ArrayType} whose{@link ArrayType#componentType() componentType()} is{@link InterfaceType}

@see PrimitiveType Subinterface PrimitiveType @see ReferenceType Subinterface ReferenceType @see Value Value - for relationship between Type and Value @see Field#type() Field.type() - for usage examples @author Robert Field @author Gordon Hirsch @author James McIlree @since 1.3

  private static void checkReferenceType(ReferenceType valueType,
      ReferenceType type) throws InvalidTypeException {
    if (valueType instanceof ArrayType) {
      if (type instanceof ArrayType) {
        try {
          Type valueComponentType = ((ArrayType) valueType)
              .componentType();
          Type componentType = ((ArrayType) type).componentType();
          if (valueComponentType instanceof PrimitiveType) {
            if (valueComponentType.equals(componentType)) {
              return;
            }
          } else if (valueComponentType instanceof ReferenceType

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   * @see IJavaStackFrame#getDeclaringType()
   */
  public IJavaClassType getDeclaringType() throws DebugException {
    Method method = getUnderlyingMethod();
    try {
      Type type = method.declaringType();
      if (type instanceof ClassType) {
        return (IJavaClassType) JDIType.createType(
            (JDIDebugTarget) getDebugTarget(), type);
      }
      targetRequestFailed(JDIDebugModelMessages.JDIStackFrame_0, null);

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   * @see org.eclipse.jdt.debug.core.IJavaStackFrame#getReferenceType()
   */
  public IJavaReferenceType getReferenceType() throws DebugException {
    Method method = getUnderlyingMethod();
    try {
      Type type = method.declaringType();
      return (IJavaReferenceType) JDIType.createType(
          (JDIDebugTarget) getDebugTarget(), type);
    } catch (RuntimeException e) {
      targetRequestFailed(
          MessageFormat.format(

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  public String getReferenceTypeName() throws DebugException {
    String genericSignature = getField().genericSignature();
    if (genericSignature != null) {
      return JDIReferenceType.getTypeName(genericSignature);
    }
    Type underlyingType = getUnderlyingType();
    if (underlyingType instanceof ReferenceType) {
      return JDIReferenceType
          .getGenericName((ReferenceType) underlyingType);
    }
    return getField().typeName();

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  /**
   * @see IJavaArray#getComponentType()
   */
  public IJavaType getComponentType() throws DebugException {
    try {
      Type type = ((ArrayType) getUnderlyingType()).componentType();
      return JDIType.createType(getJavaDebugTarget(), type);
    } catch (ClassNotLoadedException e) {
      targetRequestFailed(
          MessageFormat.format(
              JDIDebugModelMessages.JDIArrayType_exception_while_retrieving_component_type_of_array,

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        }
        try {
            // Set up parameters.
            Iterator<Type> argumentTypes = method.argumentTypes().iterator();
            while (argumentTypes.hasNext()) {
                Type next = argumentTypes.next();
                m.addParameter(TypeUtils.getTypeInfo(next));
            }
        } catch (ClassNotLoadedException ex) {
            Logger.getLogger(TypeUtils.class.getName()).log(Level.INFO, null, ex);
        }

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