com.wavemaker.runtime.data.transform.Transformers Maven / Gradle / Ivy
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* Copyright (C) 2022-2023 WaveMaker, Inc.
*
* 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 com.wavemaker.runtime.data.transform;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import org.apache.commons.lang3.ClassUtils;
/**
* @author Dilip Kumar
* @since 15/11/16
*/
public class Transformers {
private final Map, WMResultTransformer> transformerMap;
private Transformers() {
transformerMap = new HashMap<>();
transformerMap.put(Object.class, AliasToEntityLinkedHashMapTransformer.INSTANCE);
transformerMap.put(Map.class, AliasToEntityLinkedHashMapTransformer.INSTANCE);
transformerMap.put(Void.class, new VoidTransformer());
}
private static class TransformersHolder {
private static final Transformers INSTANCE = new Transformers();
}
public WMResultTransformer get(Class type) {
if (!transformerMap.containsKey(type)) {
synchronized (transformerMap) {
if (!transformerMap.containsKey(type)) {
transformerMap.put(type, new AliasToMappedClassResultTransformer(type));
}
}
}
return transformerMap.get(type);
}
public static WMResultTransformer aliasToMappedClass(Class type) {
return TransformersHolder.INSTANCE.get(type);
}
public static Optional aliasToMappedClassOptional(Class type) {
if (ClassUtils.isPrimitiveOrWrapper(type) || Number.class.isAssignableFrom(type)) {
return Optional.empty();
} else {
return Optional.ofNullable(aliasToMappedClass(type));
}
}
}