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/*
* Copyright © 2016-2017 European Support Limited
*
* 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.openecomp.core.impl;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang.StringUtils;
import org.openecomp.core.converter.errors.CreateToscaObjectErrorBuilder;
import org.openecomp.sdc.common.errors.CoreException;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;
import java.lang.reflect.Field;
import java.util.HashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class ToscaConverterUtil {
private static final String SET = "set";
private static final String DEFAULT = "default";
private static final String DEFAULT_CAPITAL = "Default";
private static final Set<String> DEFAULT_VALUE_KEYS;
private static final Logger LOGGER = LoggerFactory.getLogger(ToscaConverterUtil.class);
static {
DEFAULT_VALUE_KEYS =
Stream.of(DEFAULT, DEFAULT_CAPITAL).collect(Collectors.toSet());
}
private ToscaConverterUtil() {
// static utility methods only, prevent instantiation
}
public static <T> Optional<T> createObjectFromClass(String objectId,
Object objectCandidate,
Class<T> classToCreate) {
try {
return createObjectUsingSetters(objectCandidate, classToCreate);
} catch (Exception ex) {
throw new CoreException(
new CreateToscaObjectErrorBuilder(classToCreate.getSimpleName(), objectId)
.build(), ex);
}
}
private static <T> Optional<T> createObjectUsingSetters(Object objectCandidate,
Class<T> classToCreate)
throws ReflectiveOperationException {
if (Objects.isNull(objectCandidate)
|| !(objectCandidate instanceof Map)) {
return Optional.empty();
}
Map<String, Object> objectAsMap = (Map<String, Object>) objectCandidate;
Field[] classFields = classToCreate.getDeclaredFields();
T result = classToCreate.newInstance();
for (Field field : classFields) {
Object fieldValueToAssign = objectAsMap.get(field.getName());
String methodName = SET + StringUtils.capitalize(field.getName());
if(shouldSetterMethodNeedsToGetInvoked(classToCreate, field, fieldValueToAssign, methodName)) {
classToCreate.getMethod(methodName, field.getType()).invoke(result, fieldValueToAssign);
}
}
return Optional.of(result);
}
private static <T> boolean shouldSetterMethodNeedsToGetInvoked(Class<T> classToCreate,
Field field,
Object fieldValueToAssign,
String methodName) {
try {
return Objects.nonNull(fieldValueToAssign)
&& Objects.nonNull(classToCreate.getMethod(methodName, field.getType()));
} catch (NoSuchMethodException e) {
LOGGER.debug(String.format("Could not extract method '%s' from class '%s'. returning false " +
"with filedType '%s'.", methodName, classToCreate, field.getType()), e);
return false;
}
}
public static Optional<Object> getDefaultValue(Object entryValue,
Object objectToAssignDefaultValue) {
if (!(entryValue instanceof Map)
|| Objects.isNull(objectToAssignDefaultValue)) {
return Optional.empty();
}
return Optional.ofNullable(getDefaultParameterValue((Map<String, Object>) entryValue));
}
private static Object getDefaultParameterValue(Map<String, Object> entryValue) {
Object defaultValue = null;
Set<String> keys = new HashSet<>(entryValue.keySet());
keys.retainAll(DEFAULT_VALUE_KEYS);
if (CollectionUtils.isNotEmpty(keys)) {
defaultValue = entryValue.get(keys.iterator().next());
}
return defaultValue;
}
}
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