/*
* Copyright 2016 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.powermock.api.extension.listener;
import org.powermock.api.extension.InjectFieldSearcher;
import org.powermock.reflect.Whitebox;
import java.lang.reflect.Field;
import java.util.HashSet;
import java.util.Set;
/**
*
*/
@SuppressWarnings("unchecked")
class DefaultInjectFieldSearcher implements InjectFieldSearcher {
@Override
public Field findField(Object instance, MockMetadata mockMetadata) {
Set<Field> candidates = Whitebox.getFieldsAnnotatedWith(instance, mockMetadata.getAnnotation());
if (candidates.size() == 1) {
return candidates.iterator().next();
}
candidates = filterByQualifier(candidates, mockMetadata.getQualifier());
if (candidates.size() == 1) {
return candidates.iterator().next();
}
candidates = filterByType(candidates, mockMetadata.getType());
if (candidates.size() == 1) {
return candidates.iterator().next();
}
return null;
}
private Set<Field> filterByType(Set<Field> candidates, Class<?> type) {
if (type == null) {
return candidates;
}
return doFilterByType(candidates, type);
}
private Set<Field> doFilterByType(Set<Field> candidates, Class<?> type) {
Set<Field> fields = new HashSet<Field>();
for (Field candidate : candidates) {
if (candidate.getType().isAssignableFrom(type)) {
fields.add(candidate);
}
}
return fields;
}
private Set<Field> filterByQualifier(Set<Field> candidates, String qualifier) {
if (qualifier == null || qualifier.length() == 0) {
return candidates;
}
return doFilterByQualifier(candidates, qualifier);
}
private Set<Field> doFilterByQualifier(Set<Field> candidates, String qualifier) {
Set<Field> fields = new HashSet<Field>();
for (Field candidate : candidates) {
if (candidate.getName().equals(qualifier)) {
fields.add(candidate);
}
}
return fields;
}
}