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Cassandra support for Spring Data
/*
* Copyright 2016-2022 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
*
* https://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.springframework.data.cassandra.core.convert;
import org.springframework.data.cassandra.core.mapping.CassandraPersistentProperty;
import org.springframework.data.mapping.model.SpELExpressionEvaluator;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import com.datastax.oss.driver.api.core.data.UdtValue;
/**
* {@link CassandraValueProvider} to read property values from a {@link UdtValue}.
*
* @author Mark Paluch
* @since 3.0
*/
public class UdtValueProvider implements CassandraValueProvider {
private final UdtValue udtValue;
private final SpELExpressionEvaluator evaluator;
/**
* Create a new {@link UdtValueProvider} with the given {@link UdtValue} and {@link SpELExpressionEvaluator}.
*
* @param udtValue must not be {@literal null}.
* @param evaluator must not be {@literal null}.
*/
public UdtValueProvider(UdtValue udtValue, SpELExpressionEvaluator evaluator) {
Assert.notNull(udtValue, "UDTValue must not be null");
Assert.notNull(evaluator, "SpELExpressionEvaluator must not be null");
this.udtValue = udtValue;
this.evaluator = evaluator;
}
@Nullable
public T getPropertyValue(CassandraPersistentProperty property) {
String spelExpression = property.getSpelExpression();
if (spelExpression != null) {
return this.evaluator.evaluate(spelExpression);
}
return (T) this.udtValue.getObject(property.getRequiredColumnName());
}
@Override
public boolean hasProperty(CassandraPersistentProperty property) {
return this.udtValue.getType().contains(property.getRequiredColumnName());
}
@Override
public Object getSource() {
return this.udtValue;
}
}