| Clover coverage report - Code Coverage for hivemind release 1.2.1 |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| Defense.java | 100% | 100% | 66.7% | 91.7% |
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| 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 | 5008 | public static void notNull(Object parameter, String parameterName) |
| 39 | { | |
| 40 | 5008 | 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 | } |
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