01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: *
17: */
18: package org.apache.lenya.util;
19:
20: /**
21: * Assertion utility.
22: */
23: public final class Assert {
24:
25: /**
26: * @param parameterName The parameter name to use in the exception.
27: * @param object The object.
28: * @throws RuntimeException if the object is null.
29: */
30: public static final void notNull(String parameterName, Object object) {
31: if (object == null) {
32: throw new RuntimeException("The parameter ["
33: + parameterName + "] must not be null!");
34: }
35: }
36:
37: /**
38: * @param parameterName The parameter name to use in the exception.
39: * @param object The object.
40: * @throws RuntimeException if the object is null.
41: */
42: public static final void notNull(Object object) {
43: notNull("undefined", object);
44: }
45:
46: /**
47: * @param expression The expression to check.
48: * @param value The value.
49: * @throws RuntimeException if the value is not true.
50: */
51: public static final void isTrue(String expression, boolean value) {
52: if (!value) {
53: throw new RuntimeException("The expression [" + expression
54: + "] is not true!");
55: }
56: }
57: }
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