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package com.sun.jdi;


Provides access to the class of an array and the type of
its components in the target VM.

Author:Robert Field, Gordon Hirsch, James McIlree
See Also:
  • ArrayReference
Since: 1.3
/**
 * Provides access to the class of an array and the type of
 * its components in the target VM.
 *
 * @see ArrayReference
 *
 * @author Robert Field
 * @author Gordon Hirsch
 * @author James McIlree
 * @since  1.3
 */
public interface ArrayType extends ReferenceType {

    
Creates a new instance of this array class in the target VM.
The array is created with the given length and each component
is initialized to is standard default value.

Params:
  • length – the number of components in the new array
Throws:
Returns:the newly created ArrayReference mirroring the new object in the target VM.
/**
     * Creates a new instance of this array class in the target VM.
     * The array is created with the given length and each component
     * is initialized to is standard default value.
     *
     * @param length the number of components in the new array
     * @return the newly created {@link ArrayReference} mirroring
     * the new object in the target VM.
     *
     * @throws VMCannotBeModifiedException if the VirtualMachine is read-only - see {@link VirtualMachine#canBeModified()}.
     */
    ArrayReference newInstance(int length);

    
Gets the JNI signature of the components of this
array class. The signature
describes the declared type of the components. If the components
are objects, their actual type in a particular run-time context
may be a subclass of the declared class.

Returns:a string containing the JNI signature of array components.
/**
     * Gets the JNI signature of the components of this
     * array class. The signature
     * describes the declared type of the components. If the components
     * are objects, their actual type in a particular run-time context
     * may be a subclass of the declared class.
     *
     * @return a string containing the JNI signature of array components.
     */
    String componentSignature();

    
Returns a text representation of the component
type of this array.

Returns:a text representation of the component type.
/**
     * Returns a text representation of the component
     * type of this array.
     *
     * @return a text representation of the component type.
     */
    String componentTypeName();

    
Returns the component type of this array,
as specified in the array declaration.


Note: The component type of a array will always be
created or loaded before the array - see
The Java Virtual Machine Specification, section 5.3.3 - Creating Array Classes. However, although the component type will be loaded it may not yet be prepared, in which case the type will be returned but attempts to perform some operations on the returned type (e.g. fields()) will throw a ClassNotPreparedException. Use ReferenceType.isPrepared() to determine if a reference type is prepared. 
See Also:
Returns:the Type of this array's components.
/**
     * Returns the component type of this array,
     * as specified in the array declaration.
     * <P>
     * Note: The component type of a array will always be
     * created or loaded before the array - see
     * <cite>The Java Virtual Machine Specification</cite>,
     * section 5.3.3 - Creating Array Classes.
     * However, although the component type will be loaded it may
     * not yet be prepared, in which case the type will be returned
     * but attempts to perform some operations on the returned type
     * (e.g. {@link ReferenceType#fields() fields()}) will throw
     * a {@link ClassNotPreparedException}.
     * Use {@link ReferenceType#isPrepared()} to determine if
     * a reference type is prepared.
     *
     * @see Type
     * @see Field#type() Field.type() - for usage examples
     * @return the {@link Type} of this array's components.
     */
    Type componentType() throws ClassNotLoadedException;
}