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Cassandra support for Spring Data
/*
* Copyright 2016-2024 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.mapping;
import java.util.function.Supplier;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import com.datastax.oss.driver.api.core.CqlIdentifier;
import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.metadata.Metadata;
import com.datastax.oss.driver.api.core.type.UserDefinedType;
/**
* Default implementation of {@link UserTypeResolver} that resolves a {@link UserDefinedType} by its name from
* {@link Metadata}.
*
* @author Mark Paluch
* @since 1.5
*/
public class SimpleUserTypeResolver implements UserTypeResolver {
private final Supplier metadataSupplier;
private final CqlIdentifier keyspaceName;
/**
* Create a new {@link SimpleUserTypeResolver}.
*
* @param session must not be {@literal null}.
* @since 3.0
*/
public SimpleUserTypeResolver(CqlSession session) {
Assert.notNull(session, "Session must not be null");
this.metadataSupplier = session::getMetadata;
this.keyspaceName = session.getKeyspace().orElse(CqlIdentifier.fromCql("system"));
}
/**
* Create a new {@link SimpleUserTypeResolver}.
*
* @param session must not be {@literal null}.
* @param keyspaceName must not be {@literal null}.
* @since 3.0
*/
public SimpleUserTypeResolver(CqlSession session, CqlIdentifier keyspaceName) {
Assert.notNull(session, "Session must not be null");
Assert.notNull(keyspaceName, "Keyspace must not be null");
this.metadataSupplier = session::getMetadata;
this.keyspaceName = keyspaceName;
}
/**
* Create a new {@link SimpleUserTypeResolver}.
*
* @param metadataSupplier must not be {@literal null}.
* @param keyspaceName must not be {@literal null}.
* @since 3.2.2
*/
public SimpleUserTypeResolver(Supplier metadataSupplier, CqlIdentifier keyspaceName) {
Assert.notNull(metadataSupplier, "Metadata supplier must not be null");
Assert.notNull(keyspaceName, "Keyspace must not be null");
this.metadataSupplier = metadataSupplier;
this.keyspaceName = keyspaceName;
}
@Nullable
@Override
public UserDefinedType resolveType(CqlIdentifier typeName) {
return metadataSupplier.get().getKeyspace(keyspaceName) //
.flatMap(it -> it.getUserDefinedType(typeName)) //
.orElse(null);
}
}