Java List Cast cast(List list, Class klass)

Description

Verifies that the passed list contains only elements of the given type, and returns it as a parameterized type.

License

Apache License

Declaration

@SuppressWarnings("unchecked")
public static <T> List<T> cast(List<?> list, Class<T> klass) 

Method Source Code

//package com.java2s;
// Licensed under the Apache License, Version 2.0 (the "License");

import java.util.List;

import java.util.Set;

public class Main {
    /**/*from w  w  w. j  ava 2  s.com*/
     *  Verifies that the passed list contains only elements of the given
     *  type, and returns it as a parameterized type. Throws if any element
     *  is a different type.
     */
    @SuppressWarnings("unchecked")
    public static <T> List<T> cast(List<?> list, Class<T> klass) {
        for (Object obj : list) {
            klass.cast(obj);
        }
        return (List<T>) list;
    }

    /**
     *  Verifies that the passed set contains only elements of the given
     *  type, and returns it as a parameterized type. Throws if any element
     *  is a different type.
     */
    @SuppressWarnings("unchecked")
    public static <T> Set<T> cast(Set<?> set, Class<T> klass) {
        for (Object obj : set) {
            klass.cast(obj);
        }
        return (Set<T>) set;
    }
}

Related

1. cast(final Collection list)
2. cast(final List list)
3. cast(List list)
4. cast(List list)
5. cast(List list)
6. cast(List from)
7. CAST_LIST(Class className, Object obj)
8. castList(Class clazz, Collection c)
9. castList(Class clazz, Collection c)