|
|||||||||||||||||||
30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
Defense.java | 100% | 100% | 66.7% | 91.7% |
|
1 |
// Copyright 2004, 2005 The Apache Software Foundation
|
|
2 |
//
|
|
3 |
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
4 |
// you may not use this file except in compliance with the License.
|
|
5 |
// You may obtain a copy of the License at
|
|
6 |
//
|
|
7 |
// http://www.apache.org/licenses/LICENSE-2.0
|
|
8 |
//
|
|
9 |
// Unless required by applicable law or agreed to in writing, software
|
|
10 |
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
11 |
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
12 |
// See the License for the specific language governing permissions and
|
|
13 |
// limitations under the License.
|
|
14 |
|
|
15 |
package org.apache.hivemind.util;
|
|
16 |
|
|
17 |
import org.apache.hivemind.HiveMindMessages;
|
|
18 |
|
|
19 |
/**
|
|
20 |
* Simple utilities for defensive programming.
|
|
21 |
*
|
|
22 |
* @author Howard M. Lewis Ship
|
|
23 |
* @since 1.1
|
|
24 |
*/
|
|
25 |
public final class Defense |
|
26 |
{ |
|
27 | 0 |
private Defense()
|
28 |
{ |
|
29 |
// Prevent instantiation
|
|
30 |
} |
|
31 |
|
|
32 |
/**
|
|
33 |
* Check for null parameter when not allowed.
|
|
34 |
*
|
|
35 |
* @throws NullPointerException
|
|
36 |
* if parameter is null (the message indicates the name of the parameter).
|
|
37 |
*/
|
|
38 | 2900 |
public static void notNull(Object parameter, String parameterName) |
39 |
{ |
|
40 | 2900 |
if (parameter == null) |
41 | 1 |
throw new NullPointerException(HiveMindMessages.paramNotNull(parameterName)); |
42 |
} |
|
43 |
|
|
44 |
/**
|
|
45 |
* Check that a parameter is not null, and assignable to a particular type.
|
|
46 |
*
|
|
47 |
* @throws ClassCastException
|
|
48 |
* if not assignable (with a useable message)
|
|
49 |
*/
|
|
50 |
|
|
51 | 3 |
public static void isAssignable(Object parameter, Class expectedType, String parameterName) |
52 |
{ |
|
53 | 3 |
Defense.notNull(parameter, parameterName); |
54 |
|
|
55 | 3 |
if (!expectedType.isAssignableFrom(parameter.getClass()))
|
56 | 2 |
throw new ClassCastException(HiveMindMessages.paramWrongType( |
57 |
parameterName, |
|
58 |
parameter, |
|
59 |
expectedType)); |
|
60 |
} |
|
61 |
} |
|