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WildcardType.java
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83 lines (80 loc) · 2.49 KB
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/*
* Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.lang.reflect;
/**
* WildcardType represents a wildcard type expression, such as
* {@code ?}, {@code ? extends Number}, or {@code ? super Integer}.
*
* @since 1.5
*/
public interface WildcardType extends Type {
/**
* Returns an array of {@code Type} objects representing the upper
* bound(s) of this type variable. Note that if no upper bound is
* explicitly declared, the upper bound is {@code Object}.
*
* <p>For each upper bound B :
* <ul>
* <li>if B is a parameterized type or a type variable, it is created,
* (see {@link java.lang.reflect.ParameterizedType ParameterizedType}
* for the details of the creation process for parameterized types).
* <li>Otherwise, B is resolved.
* </ul>
*
* @return an array of Types representing the upper bound(s) of this
* type variable
* @throws TypeNotPresentException if any of the
* bounds refers to a non-existent type declaration
* @throws MalformedParameterizedTypeException if any of the
* bounds refer to a parameterized type that cannot be instantiated
* for any reason
*/
Type[] getUpperBounds();
/**
* Returns an array of {@code Type} objects representing the
* lower bound(s) of this type variable. Note that if no lower bound is
* explicitly declared, the lower bound is the type of {@code null}.
* In this case, a zero length array is returned.
*
* <p>For each lower bound B :
* <ul>
* <li>if B is a parameterized type or a type variable, it is created,
* (see {@link java.lang.reflect.ParameterizedType ParameterizedType}
* for the details of the creation process for parameterized types).
* <li>Otherwise, B is resolved.
* </ul>
*
* @return an array of Types representing the lower bound(s) of this
* type variable
* @throws TypeNotPresentException if any of the
* bounds refers to a non-existent type declaration
* @throws MalformedParameterizedTypeException if any of the
* bounds refer to a parameterized type that cannot be instantiated
* for any reason
*/
Type[] getLowerBounds();
// one or many? Up to language spec; currently only one, but this API
// allows for generalization.
}