io.micronaut.cache.interceptor.DefaultCacheKeyGenerator Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original 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 io.micronaut.cache.interceptor;
import io.micronaut.core.annotation.AnnotationMetadata;
import io.micronaut.core.annotation.Introspected;
import io.micronaut.core.util.ArrayUtils;
/**
* A default implementation of the {@link CacheKeyGenerator} interface that uses the parameters of the method only.
*
*
This implementation is appropriate for most common cases but note that collisions can occur for classes that
* use the same cache and have overlapping signatures as the default implementation does not use the method itself
* when generating the key
*
* @author Graeme Rocher
* @since 1.0
*/
@Introspected
public class DefaultCacheKeyGenerator implements CacheKeyGenerator {
@Override
public Object generateKey(AnnotationMetadata annotationMetadata, Object... params) {
if (ArrayUtils.isEmpty(params)) {
return ParametersKey.ZERO_ARG_KEY;
}
if (params.length == 1) {
Object param = params[0];
if (param != null && !param.getClass().isArray()) {
return param;
} else {
return new ParametersKey(params);
}
} else {
return new ParametersKey(params);
}
}
}