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@@ -1,109 +0,0 @@
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/*
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* Copyright 2015-2021 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.data.mongodb.repository.query;
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import org.springframework.core.convert.converter.Converter;
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import org.springframework.data.mapping.PersistentEntity;
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import org.springframework.data.mapping.PersistentProperty;
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import org.springframework.data.mapping.PersistentPropertyAccessor;
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import org.springframework.data.mapping.PreferredConstructor;
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import org.springframework.data.mapping.PreferredConstructor.Parameter;
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import org.springframework.data.mapping.SimplePropertyHandler;
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import org.springframework.data.mapping.context.MappingContext;
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import org.springframework.data.mapping.model.EntityInstantiator;
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import org.springframework.data.mapping.model.EntityInstantiators;
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import org.springframework.data.mapping.model.ParameterValueProvider;
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import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
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import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
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import org.springframework.util.Assert;
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/**
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* {@link Converter} to instantiate DTOs from fully equipped domain objects.
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*
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* @author Oliver Gierke
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* @author Mark Paluch
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*/
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class DtoInstantiatingConverter implements Converter<Object, Object> {
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private final Class<?> targetType;
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private final MappingContext<? extends PersistentEntity<?, ?>, ? extends PersistentProperty<?>> context;
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private final EntityInstantiator instantiator;
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/**
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* Creates a new {@link Converter} to instantiate DTOs.
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*
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* @param dtoType must not be {@literal null}.
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* @param context must not be {@literal null}.
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* @param entityInstantiators must not be {@literal null}.
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*/
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public DtoInstantiatingConverter(Class<?> dtoType,
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MappingContext<? extends MongoPersistentEntity<?>, MongoPersistentProperty> context,
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EntityInstantiators entityInstantiators) {
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Assert.notNull(dtoType, "DTO type must not be null!");
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Assert.notNull(context, "MappingContext must not be null!");
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Assert.notNull(entityInstantiators, "EntityInstantiators must not be null!");
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this.targetType = dtoType;
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this.context = context;
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this.instantiator = entityInstantiators.getInstantiatorFor(context.getRequiredPersistentEntity(dtoType));
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}
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/*
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* (non-Javadoc)
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* @see org.springframework.core.convert.converter.Converter#convert(java.lang.Object)
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*/
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@Override
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public Object convert(Object source) {
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if (targetType.isInterface()) {
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return source;
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}
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final PersistentEntity<?, ?> sourceEntity = context.getRequiredPersistentEntity(source.getClass());
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final PersistentPropertyAccessor sourceAccessor = sourceEntity.getPropertyAccessor(source);
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final PersistentEntity<?, ?> targetEntity = context.getRequiredPersistentEntity(targetType);
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final PreferredConstructor<?, ? extends PersistentProperty<?>> constructor = targetEntity
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.getPersistenceConstructor();
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@SuppressWarnings({ "rawtypes", "unchecked" })
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Object dto = instantiator.createInstance(targetEntity, new ParameterValueProvider() {
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@Override
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public Object getParameterValue(Parameter parameter) {
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return sourceAccessor.getProperty(sourceEntity.getPersistentProperty(parameter.getName().toString()));
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}
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});
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final PersistentPropertyAccessor dtoAccessor = targetEntity.getPropertyAccessor(dto);
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targetEntity.doWithProperties(new SimplePropertyHandler() {
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@Override
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public void doWithPersistentProperty(PersistentProperty<?> property) {
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if (constructor.isConstructorParameter(property)) {
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return;
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}
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dtoAccessor.setProperty(property,
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sourceAccessor.getProperty(sourceEntity.getPersistentProperty(property.getName())));
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}
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});
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return dto;
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}
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}
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Oliver Drotbohm