1/*
2 * Copyright 2001-2009 OFFIS, Tammo Freese
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package org.easymock.internal.matchers;
17
18import java.io.Serializable;
19
20import org.easymock.IArgumentMatcher;
21
22public class EqualsWithDelta implements IArgumentMatcher, Serializable {
23
24    private static final long serialVersionUID = -3018631689416120154L;
25
26    private final Number expected;
27
28    private final Number delta;
29
30    public EqualsWithDelta(Number value, Number delta) {
31        this.expected = value;
32        this.delta = delta;
33    }
34
35    public boolean matches(Object actual) {
36        Number actualNumber = (Number) actual;
37        return expected.doubleValue() - delta.doubleValue() <= actualNumber
38                .doubleValue()
39                && actualNumber.doubleValue() <= expected.doubleValue()
40                        + delta.doubleValue();
41    }
42
43    public void appendTo(StringBuffer buffer) {
44        buffer.append("eq(" + expected + ", " + delta + ")");
45    }
46}
47