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/*
* Copyright 2003-2009 OFFIS, Henri Tremblay
*
* 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;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
/**
* Will contain what was captured by the <code>capture()</code> matcher. Knows
* if something was captured or not (allows to capture a null value).
*
* @param <T>
* Type of the captured element
*/
public class Capture<T> implements Serializable {
private static final long serialVersionUID = -4214363692271370781L;
private CaptureType type;
private final List<T> values = new ArrayList<T>(2);
/**
* Default constructor. Only the last element will be captured
*/
public Capture() {
this(CaptureType.LAST);
}
/**
* Constructor allowing to select the capture type
*
* @param type
* capture type
*/
public Capture(CaptureType type) {
this.type = type;
}
/**
* Will reset capture to a "nothing captured yet" state
*/
public void reset() {
values.clear();
}
/**
* @return true if something was captured
*/
public boolean hasCaptured() {
return !values.isEmpty();
}
/**
* Return captured value
*
* @throws AssertionError
* if nothing was captured yet or if more than one value was
* captured
* @return The last captured value
*/
public T getValue() {
if (values.isEmpty()) {
throw new AssertionError("Nothing captured yet");
}
if (values.size() > 1) {
throw new AssertionError("More than one value captured: "
+ getValues());
}
return values.get(values.size() - 1);
}
/**
* Return all captured values. It returns the actual list so you can modify
* it's content if needed
*
* @return The currently captured values
*/
public List<T> getValues() {
return values;
}
/**
* Used internally by the EasyMock framework to add a new captured value
*
* @param value
* Value captured
*/
public void setValue(T value) {
switch (type) {
case NONE:
break;
case ALL:
values.add(value);
break;
case FIRST:
if (!hasCaptured()) {
values.add(value);
}
break;
case LAST:
if (hasCaptured()) {
reset();
}
values.add(value);
break;
// ///CLOVER:OFF
default:
throw new IllegalArgumentException("Unknown capture type: " + type);
// ///CLOVER:ON
}
}
@Override
public String toString() {
if (values.isEmpty()) {
return "Nothing captured yet";
}
if (values.size() == 1) {
return String.valueOf(values.get(0));
}
return values.toString();
}
}
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