How to use method of org.easymock.internal.Result class

1/*
2 * Copyright 2001-2021 the original author or authors.
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;
17
18import org.easymock.IAnswer;
19
20import java.io.Serializable;
21import java.lang.reflect.Array;
22import java.lang.reflect.InvocationTargetException;
23import java.lang.reflect.Method;
24
25/**
26 * @author OFFIS, Tammo Freese
27 */
28public final class Result implements IAnswer<Object>, Serializable {
29
30    private static final long serialVersionUID = 5476251941213917681L;
31
32    private final IAnswer<?> value;
33
34    private final boolean shouldFillInStackTrace;
35
36    private Result(IAnswer<?> value, boolean shouldFillInStackTrace) {
37        this.value = value;
38        this.shouldFillInStackTrace = shouldFillInStackTrace;
39    }
40
41    public static Result createThrowResult(final Throwable throwable) {
42        class ThrowingAnswer implements IAnswer<Object>, Serializable {
43
44            private static final long serialVersionUID = -332797751209289222L;
45
46            public Object answer() throws Throwable {
47                throw throwable;
48            }
49
50            @Override
51            public String toString() {
52                return "Answer throwing " + throwable;
53            }
54        }
55        return new Result(new ThrowingAnswer(), true);
56    }
57
58    public static Result createReturnResult(final Object value) {
59        class ReturningAnswer implements IAnswer<Object>, Serializable {
60
61            private static final long serialVersionUID = 6973893913593916866L;
62
63            public Object answer() {
64                return value;
65            }
66
67            @Override
68            public String toString() {
69                return "Answer returning " + value;
70            }
71        }
72        return new Result(new ReturningAnswer(), true);
73    }
74
75    public static Result createDelegatingResult(final Object value) {
76        class DelegatingAnswer implements IAnswer<Object>, Serializable {
77
78            private static final long serialVersionUID = -5699326678580460103L;
79
80            public Object answer() throws Throwable {
81                Invocation invocation = LastControl.getCurrentInvocation();
82                try {
83                    Method m = invocation.getMethod();
84                    if(!m.isAccessible()) {
85                        m.setAccessible(true);
86                    }
87                    return m.invoke(value, convertVarargs(m, invocation.getArguments()));
88                } catch (IllegalArgumentException e) {
89                    throw new IllegalArgumentException("Delegation to object [" + value
90                            + "] is not implementing the mocked method [" + invocation.getMethod() + "]", e);
91                } catch (InvocationTargetException e) {
92                    throw e.getCause();
93                }
94            }
95
96            private Object[] convertVarargs(Method method, Object[] arguments) {
97                if(!method.isVarArgs()) {
98                    return arguments;
99                }
100                Class<?>[] paramTypes = method.getParameterTypes();
101                Object[] packedArguments = new Object[paramTypes.length];
102
103                int normalArgLength = paramTypes.length - 1;
104                int varargLength = arguments.length - paramTypes.length + 1;
105
106                // Copy all the non varargs arguments
107                System.arraycopy(arguments, 0, packedArguments, 0, normalArgLength);
108
109                // Now copy the varargs ones to a new array
110                Object varargs = Array.newInstance(paramTypes[packedArguments.length-1].getComponentType(), varargLength);
111                for (int i = 0; i < varargLength; i++) {
112                    Array.set(varargs, i, arguments[normalArgLength + i]);
113                }
114
115                // Put the vararg at the last place
116                packedArguments[packedArguments.length - 1] = varargs;
117                return packedArguments;
118            }
119
120            @Override
121            public String toString() {
122                return "Delegated to " + value;
123            }
124        }
125        return new Result(new DelegatingAnswer(), false);
126    }
127
128    public static Result createAnswerResult(IAnswer<?> answer) {
129        return new Result(answer, false);
130    }
131
132    public Object answer() throws Throwable {
133        return value.answer();
134    }
135
136    public boolean shouldFillInStackTrace() {
137        return shouldFillInStackTrace;
138    }
139
140    @Override
141    public String toString() {
142        return value.toString();
143    }
144}
145

Source: Result.java

/*
 * Copyright 2001-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.easymock.internal;

import org.easymock.IAnswer;

import java.io.Serializable;
import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * @author OFFIS, Tammo Freese
 */
public final class Result implements IAnswer<Object>, Serializable {

    private static final long serialVersionUID = 5476251941213917681L;

    private final IAnswer<?> value;

    private final boolean shouldFillInStackTrace;

    private Result(IAnswer<?> value, boolean shouldFillInStackTrace) {
        this.value = value;
        this.shouldFillInStackTrace = shouldFillInStackTrace;
    }

    public static Result createThrowResult(final Throwable throwable) {
        class ThrowingAnswer implements IAnswer<Object>, Serializable {

            private static final long serialVersionUID = -332797751209289222L;

            public Object answer() throws Throwable {
                throw throwable;
            }

            @Override
            public String toString() {
                return "Answer throwing " + throwable;
            }
        }
        return new Result(new ThrowingAnswer(), true);
    }

    public static Result createReturnResult(final Object value) {
        class ReturningAnswer implements IAnswer<Object>, Serializable {

            private static final long serialVersionUID = 6973893913593916866L;

            public Object answer() {
                return value;
            }

            @Override
            public String toString() {
                return "Answer returning " + value;
            }
        }
        return new Result(new ReturningAnswer(), true);
    }

    public static Result createDelegatingResult(final Object value) {
        class DelegatingAnswer implements IAnswer<Object>, Serializable {

            private static final long serialVersionUID = -5699326678580460103L;

            public Object answer() throws Throwable {
                Invocation invocation = LastControl.getCurrentInvocation();
                try {
                    Method m = invocation.getMethod();
                    if(!m.isAccessible()) {
                        m.setAccessible(true);
                    }
                    return m.invoke(value, convertVarargs(m, invocation.getArguments()));
                } catch (IllegalArgumentException e) {
                    throw new IllegalArgumentException("Delegation to object [" + value
                            + "] is not implementing the mocked method [" + invocation.getMethod() + "]", e);
                } catch (InvocationTargetException e) {
                    throw e.getCause();
                }
            }

            private Object[] convertVarargs(Method method, Object[] arguments) {
                if(!method.isVarArgs()) {
                    return arguments;
                }
                Class<?>[] paramTypes = method.getParameterTypes();
                Object[] packedArguments = new Object[paramTypes.length];

                int normalArgLength = paramTypes.length - 1;
                int varargLength = arguments.length - paramTypes.length + 1;

                // Copy all the non varargs arguments
                System.arraycopy(arguments, 0, packedArguments, 0, normalArgLength);

                // Now copy the varargs ones to a new array
                Object varargs = Array.newInstance(paramTypes[packedArguments.length-1].getComponentType(), varargLength);
                for (int i = 0; i < varargLength; i++) {
                    Array.set(varargs, i, arguments[normalArgLength + i]);
                }

                // Put the vararg at the last place
                packedArguments[packedArguments.length - 1] = varargs;
                return packedArguments;
            }

            @Override
            public String toString() {
                return "Delegated to " + value;
            }
        }
        return new Result(new DelegatingAnswer(), false);
    }

    public static Result createAnswerResult(IAnswer<?> answer) {
        return new Result(answer, false);
    }

    public Object answer() throws Throwable {
        return value.answer();
    }

    public boolean shouldFillInStackTrace() {
        return shouldFillInStackTrace;
    }

    @Override
    public String toString() {
        return value.toString();
    }
}