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Cassandra support for Spring Data
/*
* Copyright 2020-2021 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.cql;
import org.springframework.lang.Nullable;
import com.datastax.oss.driver.api.core.cql.BatchStatement;
import com.datastax.oss.driver.api.core.cql.BatchableStatement;
import com.datastax.oss.driver.api.core.cql.BoundStatement;
import com.datastax.oss.driver.api.core.cql.PreparedStatement;
import com.datastax.oss.driver.api.core.cql.SimpleStatement;
import com.datastax.oss.driver.api.core.cql.Statement;
/**
* Utility to extract CQL queries from a {@link Statement}.
*
* @author Mark Paluch
* @since 3.0.5
*/
public class QueryExtractorDelegate {
/**
* Try to extract the {@link SimpleStatement#getQuery() CQL query} from a statement object.
*
* @param statement the statement object.
* @return the CQL query when {@code statement} is not {@code null}.
*/
@Nullable
public static String getCql(@Nullable Object statement) {
if (statement == null) {
return null;
}
if (statement instanceof CqlProvider) {
return ((CqlProvider) statement).getCql();
}
if (statement instanceof SimpleStatement) {
return ((SimpleStatement) statement).getQuery();
}
if (statement instanceof PreparedStatement) {
return ((PreparedStatement) statement).getQuery();
}
if (statement instanceof BoundStatement) {
return getCql(((BoundStatement) statement).getPreparedStatement());
}
if (statement instanceof BatchStatement) {
StringBuilder builder = new StringBuilder();
for (BatchableStatement batchableStatement : ((BatchStatement) statement)) {
String query = getCql(batchableStatement);
builder.append(query).append(query.endsWith(";") ? "" : ";");
}
return builder.toString();
}
return String.format("Unknown: %s", statement);
}
}